How Do Real Estate Investments Produce Income? Contracts & Leases

Retail Properties

Retail properties include neighborhood centers, grocery-anchored centers, power centers, lifestyle centers, single-tenant retail buildings, and regional malls. Income is generated primarily through rent paid by retailers, restaurants, service providers, and other consumer-facing tenants. Retail leases often include base rent, expense reimbursements, rent escalations, and, in some cases, percentage rent tied to the tenant’s sales performance.

Lease terms vary by tenant type and property format. Smaller shop tenants may sign shorter leases, often 3 to 10 years, while national retailers and anchor tenants often sign longer leases, commonly 5 to 15 years or more. Anchor tenants may receive lower rent or more favorable terms because their presence can increase foot traffic, support smaller tenants, and improve the overall marketability of the center.

Retail performance depends on trade-area demographics, consumer spending, tenant sales, visibility, access, parking, tenant mix, foot traffic, and competition from both nearby centers and e-commerce. Strong retail assets are increasingly those that offer convenience, necessity-based goods, food and beverage, services, entertainment, or other uses that are harder to replace online. Current retail fundamentals remain relatively healthy in many U.S. markets because new supply has been limited and vacancy remains low, but performance is becoming more selective by location, format, and tenant category.

Primary risks include tenant credit, store closures, weak sales productivity, lease rollover, co-tenancy clauses, changing consumer behavior, e-commerce pressure, and property obsolescence.

Industrial Properties

Industrial properties include warehouses, distribution centers, logistics facilities, manufacturing buildings, cold storage, research and development space, and flex space. Income is generated by leasing space to tenants that use the property for storage, production, distribution, fulfillment, or light industrial operations.

Industrial leases are often structured as triple-net leases, where tenants pay base rent plus some or all property-level expenses, including taxes, insurance, utilities, maintenance, and common-area costs. However, responsibility for structural repairs, roof, HVAC, and major capital items depends on the specific lease terms. Lease terms often range from 3 to 10 years, with 5 to 10 years common for warehouse and distribution tenants. Longer terms are more common for build-to-suit facilities, manufacturing users, credit tenants, and properties requiring significant tenant-specific improvements.

Industrial demand is driven by e-commerce, third-party logistics, supply-chain strategy, transportation costs, port and highway access, labor availability, manufacturing activity, and proximity to end customers. Modern logistics facilities with high clear heights, efficient loading, strong power capacity, trailer parking, and good transportation access are generally more competitive than older, functionally obsolete buildings.

Primary risks include tenant credit, lease rollover, market vacancy, transportation access, building functionality, environmental issues, capital repair obligations, zoning constraints, and changes in supply-chain or logistics demand.

Hospitality Properties

Hospitality properties include hotels, resorts, extended-stay hotels, and other lodging assets. From a commercial real estate perspective, the key issue is how the owner receives economic return from the property. Unlike traditional office, retail, industrial, or residential assets, hospitality properties may be structured as leased real estate, owner-operated businesses, managed assets, franchised hotels, or a combination of these models.

When the property is leased to a hotel operator, the owner’s income is governed by the lease. Rent may be structured as fixed rent, percentage rent, or a combination of both. Fixed rent provides the owner with more predictable income. Percentage rent gives the owner a share of the hotel’s performance, usually based on a negotiated percentage of rooms revenue, total hotel revenue, or revenue above a stated threshold. Some leases also include a minimum guaranteed rent plus percentage rent, giving the owner downside protection and participation in upside performance.

When the owner retains hotel operating exposure, income is driven by the hotel’s operating performance, including occupancy, average daily rate, revenue per available room, operating expenses, brand fees, management fees, and capital reserves. In a hotel management agreement, the owner typically owns the hotel economics and pays a third-party operator to manage the property. In a franchise structure, the owner or tenant pays a hotel brand for the right to use the brand name, reservation system, loyalty program, and operating standards.

Hospitality underwriting therefore focuses on both the real estate and the hotel operating structure. Key considerations include lease term, rent formula, rent coverage, operator credit, brand affiliation, management or franchise agreements, capital expenditure obligations, furniture, fixtures, and equipment reserves, seasonality, tourism and business travel demand, local competition, and labor costs. Compared with many other property types, hospitality assets are more exposed to operating volatility because property-level performance can change quickly with travel demand, pricing, brand performance, and economic cycles.

Specialty and Other Property Types

Specialty real estate includes self-storage facilities, medical office buildings, senior housing, hospitals, data centers, agricultural land, mixed-use developments, life science facilities, student housing, and other niche property types. These assets are grouped together because they do not fit cleanly into the traditional residential, office, retail, industrial, or hospitality categories. Each subtype has its own income drivers, lease structures, operating requirements, and risk profile.

Self-storage facilities generate income from rental agreements for storage units, often on a month-to-month basis. Revenue depends on occupancy, rental rates, unit mix, move-in and move-out activity, tenant duration, insurance or administrative fees, and local supply. Because leases are short-term, owners can adjust rents frequently, but income can also be sensitive to competition and customer turnover.

Healthcare properties include medical office buildings, outpatient clinics, senior housing, and hospitals. Medical office income is often generated through leases with physician groups, health systems, or specialty providers. These tenants may require expensive buildouts, specialized infrastructure, and longer occupancy periods. Senior housing and hospitals may involve more complex structures, including leases, management agreements, operating businesses, or joint ventures. Key risks include regulation, reimbursement pressure, operator quality, tenant credit, licensing, and specialized capital expenditure needs.

Data centers generate income by leasing highly specialized space, power capacity, and cooling infrastructure to cloud providers, technology companies, enterprises, or colocation users. Revenue may be based on leased square footage, power capacity, metered power usage, or service-related charges, depending on the structure. Key underwriting factors include power availability, grid interconnection, cooling capacity, redundancy, fiber connectivity, tenant credit, security, and the cost of ongoing infrastructure upgrades.

Agricultural land generates returns through crop production, grazing leases, ground leases, conservation uses, or long-term land appreciation. Income depends on soil quality, water rights, commodity prices, operating costs, tenant farming arrangements, and development potential. Mixed-use properties combine multiple uses, such as residential, retail, office, hotel, or entertainment, so underwriting must evaluate each component separately and then assess how the uses interact.

When a property’s current use no longer generates adequate returns, investors may evaluate whether the asset could be converted to a higher-value use. This process, known as adaptive reuse, is closely tied to the concept of highest and best use: the use that is legally permissible, physically possible, financially feasible, and maximally productive.

Adaptive reuse has become especially relevant in the office sector, where weak demand for older or less competitive office buildings has coincided with strong housing demand in many urban markets. Therefore, offices have been converted to residential properties to unlock the related value for the community. For example, according to RentCafe, the U.S. office-to-apartment conversion pipeline reached approximately 70,700 units in 2025, and later increased to roughly 90,000 units in 2026. However, these figures represent units in the conversion pipeline, not necessarily completed apartments.

The strategy creates value only when the expected increase in property value exceeds the full cost and risk of conversion. Investors must consider acquisition basis, construction costs, design limitations, building code compliance, permitting, tenant buyouts or lease termination costs, financing, carrying costs, and the expected income from the new use.

A proposed conversion must be legally and politically feasible. Projects may require rezoning, variances, entitlement approvals, environmental review, building-code modifications, and coordination with local government. Developers may also need to engage with neighborhood residents, business owners, and community groups, particularly when a conversion increases density, changes traffic patterns, reduces parking, or introduces multifamily housing into an area where residents may object.

Buying and selling real estate involves transaction costs that reduce total returns. Investors should include these costs when projecting cash-on-cash return, IRR, equity multiple, and net sale proceeds. The estimates below are rough underwriting assumptions and should be adjusted based on property type, deal size, location, financing structure, and negotiated terms.

Below is an overview of the different types of costs that should be considered with any transaction; we will cover these concepts in more detail during related modeling exercises. A complete underwriting model should include acquisition costs at purchase, financing costs at closing, operating and capital costs during ownership, and disposition costs at sale.

Although the legal effect of purchase agreements and leases differs, both are governed by basic contract law and, in many cases, additional rules that apply specifically to real estate transactions. For a real estate contract to be enforceable, it generally must satisfy the core requirements of contract law as well as additional requirements that apply specifically to real property transactions. If a required element is missing, the agreement may be unenforceable, void, or voidable, depending on the nature of the deficiency and applicable state law.

When one party fails to fulfill its contractual obligations, the non-breaching party may have several legal remedies available. The appropriate remedy depends on the type of contract, the nature of the breach, the contract terms, and applicable state law.

The period after signing a real estate contract and before closing, occupancy, or lease commencement typically involves due diligence, financing, documentation, and closing preparation. The specific steps depend on whether the transaction is a purchase, a lease, residential, commercial, financed, or cash-funded.

A contingency is a condition that must be satisfied, waived, or otherwise resolved before a party is required to proceed with the transaction. Contingencies are important because they allocate risk between the buyer and seller during the period between contract execution and closing. If a contingency is not satisfied within the required timeframe, the contract may allow the buyer or seller to terminate the agreement, renegotiate terms, or proceed only after formally waiving the condition. Common purchase contract contingencies include:

Many purchase contracts are closely tied to the buyer’s financing plan. Even when the loan documents are separate from the purchase contract, the ability to close often depends on whether the buyer’s lender approves the loan, completes underwriting, confirms collateral value, clears title and survey issues, and funds the loan on time.

A lender may require an acceptable appraisal, clean title, environmental reports, property insurance, entity documents, guarantees, reserves, tenant estoppels, SNDAs, or other closing deliverables before funding. If these conditions are not satisfied, the buyer may not receive the loan proceeds needed to close. For that reason, purchase contracts often include financing contingencies, lender approval deadlines, and closing conditions tied to loan funding.

In commercial real estate, the purchase contract, loan commitment, and closing process are connected, but they are not the same document. The purchase contract governs the buyer’s and seller’s obligations to complete the sale. The loan documents govern the borrower’s and lender’s rights, funding conditions, repayment obligations, collateral, covenants, defaults, and remedies. The financing structure itself, including senior debt, mezzanine debt, preferred equity, common equity, guarantees, reserves, covenants, and lender protections, will be discussed in more detail in the capital stack portion of this course.

RESPA and Consumer Mortgage Transactions

The Real Estate Settlement Procedures Act, or RESPA, is primarily a consumer protection law for residential mortgage settlement practices. It requires certain disclosures, restricts kickbacks and referral fees, regulates escrow practices, and provides protections related to mortgage servicing transfers. For a commercial real estate course, RESPA is usually not a central topic because loans made primarily for business, commercial, or agricultural purposes are generally exempt. Most CRE transactions instead focus on negotiated loan terms, title review, environmental diligence, surveys, entity authority, lender underwriting, covenants, guarantees, and closing conditions. Students should understand RESPA at a high level because it affects many residential mortgage transactions, but it is less relevant to most commercial acquisitions, commercial leases, and business-purpose real estate financing.

Lease structures vary by how much of the property’s operating costs the tenant pays. This allocation fundamentally affects the risk and return profile for both parties. The spectrum runs from gross leases, where the landlord bears most operating expense risk, to absolute net leases, where the tenant bears most property-level cost risk. Base rent generally adjusts to reflect this allocation: gross lease rents are often higher because the landlord is absorbing more expenses, while net lease rents are often lower because the tenant pays many expenses separately.

Lease agreements do more than state the rent amount. They define the tenant’s right to use and occupy the leased premises, the landlord’s ongoing obligations, the allocation of operating costs, and the economic risks each party accepts. For real estate investors, lease terms directly affect revenue predictability, operating expenses, capital expenditures, financing risk, valuation, and exit value.

Duration and Renewal

Lease terms can range from month-to-month residential agreements to long-term commercial leases lasting 10, 15, 25 years, or more. Longer lease terms can provide income stability for the landlord and occupancy certainty for the tenant, but they may reduce the landlord’s ability to adjust rents to market if rent escalations are limited. A lease should clearly define the commencement date (which is separate from the signature date), as well as the expiration date, rent commencement date, delivery conditions, and any free rent period. These dates are especially important when the tenant is taking possession before rent begins, when landlord work must be completed before occupancy, or when tenant improvements delay opening. Options can materially affect future cash flows: renewal options may reduce downtime risk but may limit the landlord’s ability to mark rent to market; expansion rights, rights of first offer, and rights of first refusal affect future leasing flexibility; contraction or early-termination rights can reduce expected income and increase vacancy risk. These provisions should be reflected in sensitivity cases, especially for large tenants or single-tenant assets.

Rent Escalation Mechanisms

Many commercial leases include provisions for rent increases over the lease term. Common escalation mechanisms include fixed increases (rent rises by a stated dollar amount or percentage at scheduled intervals, such as 3% annually); CPI adjustments (rent adjusts based on changes in the Consumer Price Index or another inflation measure, sometimes with caps, floors, or both); and percentage rent (common in retail, requiring the tenant to pay base rent plus a percentage of gross sales above a specified breakpoint, which allows the landlord to share in the tenant’s upside if sales exceed a threshold). The lease should carefully define gross sales, exclusions, reporting requirements, audit rights, and the breakpoint calculation.

Common Area Maintenance (CAM) Charges

In multi-tenant properties, tenants often share the cost of maintaining and operating common areas such as lobbies, hallways, elevators, parking lots, landscaping, security, restrooms, and shared building systems. These costs are commonly referred to as common area maintenance, or CAM, charges. CAM is usually allocated based on each tenant’s proportionate share of the property, often measured by rentable square footage, but the lease controls the exact calculation. Tenants may pay estimated CAM monthly, followed by an annual reconciliation comparing estimated payments to actual costs. CAM provisions are heavily negotiated because they affect the tenant’s total occupancy cost and the landlord’s ability to recover property-level expenses. Important issues include exclusions, administrative fees, capital expenditure treatment, audit rights, controllable expense caps, and whether costs are grossed up for occupancy.

Assignment and Subletting

Assignment and subletting provisions control whether the tenant can transfer some or all of its lease rights to another party. An assignment generally transfers the tenant’s leasehold interest to a new tenant for the remaining lease term. A sublease transfers less than the tenant’s full leasehold interest, such as only part of the space or only part of the remaining term. Most commercial leases require the landlord’s prior written consent before assignment or subletting. Whether the landlord may withhold consent in its sole discretion, or may not unreasonably withhold consent, depends on the lease language and applicable law. Even after an assignment or sublease, the original tenant may remain liable under the lease unless the landlord expressly releases it. These provisions affect tenant flexibility, landlord control over the tenant mix, credit risk, and the marketability of the space.

Tenant Improvement (TI) Allowances

In office, retail, and some industrial leases, the landlord may provide a tenant improvement allowance to help the tenant customize the leased premises. The allowance is often stated as a dollar amount per square foot and may be used for construction, design, permitting, fixtures, building systems, signage, or other approved costs. A TI allowance is an economic concession from the landlord. It reduces the tenant’s upfront cash burden, but it is typically reflected in the overall rent economics of the deal; the landlord may recover the cost through higher base rent, a longer lease term, stronger credit support, or other negotiated terms. For this reason, analysts should not evaluate rent in isolation; they should consider the full economic package, including base rent, free rent, TI allowance, leasing commissions, renewal options, and expected downtime. If the landlord funds improvements, the TI allowance is usually modeled as an upfront leasing cost or capital expenditure rather than an operating expense, which reduces near-term cash flow and affects yield, payback period, levered returns, and valuation. Analysts should model TI allowances in three stages: before the lease (the landlord’s upfront capital requirement and the tenant’s decision to sign), during the lease (net effective rent, cash flow timing, return on cost, and risk allocation), and after expiration (whether the space can be reused, whether additional capital is needed to re-lease, and whether the tenant has restoration obligations).

The lease and work letter should specify the scope of work, approval rights, construction deadlines, payment procedures, responsibility for cost overruns, and what happens if the allowance is not fully used. They should also specify who owns the improvements during the lease term and at expiration. Improvements permanently attached to the property often become part of the real estate, while removable trade fixtures, furniture, equipment, signage, and tenant-specific personal property may remain the tenant’s. The residual value of the improvements also matters: generic improvements (standard office layouts, HVAC upgrades, restrooms, building infrastructure) may benefit future tenants and reduce future leasing costs, while highly specialized improvements (branded retail layouts, executive headquarters buildouts, restaurant kitchens, labs, medical or data-heavy space) may have limited value to the next tenant and may even create demolition or restoration costs. In major commercial leases, TI ownership and restoration provisions can be as economically important as the stated rent.

Use Restrictions and Exclusivity

Use clauses define what activities the tenant may conduct in the leased premises. A narrow use clause gives the landlord more control over the property and tenant mix, while a broader use clause gives the tenant more operational flexibility. Exclusivity clauses, common in retail leases, may prevent the landlord from leasing space in the same property or shopping center to a competing business. These provisions can protect the tenant’s business model, but they can also limit the landlord’s future leasing flexibility and affect the property’s value.

Maintenance, Repairs, and Capital Expenditures

A lease should clearly allocate responsibility for maintenance, repairs, replacements, and capital expenditures. Depending on the lease structure, the landlord may be responsible for structural elements, roof, foundation, exterior walls, building systems, parking areas, and common areas, while the tenant may be responsible for interior maintenance, utilities, trade fixtures, and damage caused by its operations. This allocation is economically significant, and a lease labeled "triple net" may still leave the landlord responsible for major structural repairs or capital replacements unless the lease shifts those obligations to the tenant.

Insurance, Indemnity, and Risk of Loss

Commercial leases usually require one or both parties to maintain insurance, such as property, liability, business interruption, or workers’ compensation coverage appropriate for the property and tenant use. Indemnity provisions allocate responsibility for certain claims, losses, damages, or liabilities, determining which party bears the financial risk if someone is injured, property is damaged, environmental issues arise, or the tenant’s operations create legal exposure.

Default and Remedies

Leases should define what constitutes default, what notice and cure periods apply, and what remedies are available. Tenant defaults may include failure to pay rent, unauthorized assignment, prohibited use, failure to maintain insurance, abandonment, or violation of material lease terms. Landlord defaults may include failure to deliver possession, failure to maintain required building systems, or interference with the tenant’s rights. Remedies may include late fees, interest, damages, termination, eviction, self-help rights, rent abatement, injunctive relief, or other remedies permitted by the lease and applicable law.

Casualty and Condemnation

Casualty provisions address what happens if the property is damaged by fire, flood, earthquake, or another event: whether the landlord must restore the property, whether rent is abated during restoration, and when either party may terminate. Condemnation provisions address what happens if the government takes all or part of the property through eminent domain, allocating rights to condemnation awards and determining whether the lease continues or terminates after the taking.

Estoppels, SNDAs, and Lender Requirements

In financed commercial properties, lenders often require tenant estoppel certificates and subordination, non-disturbance, and attornment agreements, known as SNDAs. An estoppel certificate confirms key lease facts, such as rent, term, defaults, options, and amendments. An SNDA establishes the relationship among the tenant, landlord, and lender if the property is foreclosed. These documents affect financing, lender risk, tenant protection, and the property’s sale or refinancing process.

Beyond base rent and lease term, commercial leases include many provisions that affect underwriting, NOI, cash flow timing, re-tenanting risk, and valuation. Analysts should not model a lease based only on the headline rent. They should read the lease to determine what income is collectible, what expenses are recoverable, when rent begins, which costs remain with the landlord, and what rights may change the cash flow profile over time.

Two of the provisions above appear so often in office and retail underwriting that they deserve a full numeric walkthrough: the expense stop (or base year) and net effective rent. Consider a 5-year office lease for 10,000 rentable square feet at a starting base rent of $30.00 per square foot per year with 3% annual escalations. The landlord grants 3 months of free rent and a $50.00 per square foot tenant improvement allowance. Year 1 operating expenses are $10.00 per square foot and are expected to grow 4% per year. The lease uses a base-year structure, so the expense stop equals the Year 1 expense level of $10.00 per square foot.

Expense Stop Recoveries

Each year, the tenant reimburses the landlord for operating expenses above the stop, per square foot, multiplied by the rentable area. In Year 1, expenses equal the stop ($10.00), so the reimbursement is $0. In Year 2, expenses grow to $10.00 × 1.04 = $10.40 per square foot; the excess over the stop is $0.40, so the tenant reimburses $0.40 × 10,000 = $4,000. In Year 3, expenses are $10.816 per square foot (an excess of $0.816), producing a reimbursement of $8,160. In Year 4, expenses reach about $11.25 (an excess of about $1.25), producing about $12,486. In Year 5, expenses reach about $11.70 (an excess of about $1.70), producing about $16,986. Over the full term the landlord recovers approximately $41,632, an average of roughly $8,326 per year. Notice the pattern: recoveries start at zero and grow every year, because the stop is fixed while expenses compound above it.

Net Effective Rent (NER)

Free rent and the TI allowance are real economic concessions, so practitioners typically spread them across the term to compare deals on a single number. Base rent in this lease is $300,000 in Year 1, then $309,000, $318,270, approximately $327,818, and approximately $337,653, which totals approximately $1,592,741 over the 5 years. The free rent is valued at the Year 1 rate: 3 × ($300,000 ÷ 12) = $75,000. The TI allowance costs the landlord $50.00 × 10,000 = $500,000. Net effective rent = (total base rent − free rent − TI allowance) ÷ term ÷ square feet = ($1,592,741 − $75,000 − $500,000) ÷ 5 ÷ 10,000 ≈ $20.35 per square foot per year. The $30.00 face rate overstates the landlord's true economics by nearly $10 per square foot per year in this example, which is why competing proposals are generally compared on NER rather than headline rent.

Continuing with Ridgeline Terrace (our running example for this chapter, with an Effective Gross Income of $2,209,500), we now build out each operating expense component. Ridgeline Terrace is a 100-unit multifamily property.

Property Taxes

Property taxes are imposed by local governments and are typically based on the property’s assessed value multiplied by the applicable tax rate. The tax rate may include multiple components, such as county, city, school district, special assessment, or other local charges. In some markets, this rate is referred to as a millage rate. For Ridgeline Terrace, assume an assessed value of $25,000,000 and an effective property tax rate of 1.1% → $275,000. For underwriting, investors should not rely only on the seller’s current tax bill; they should review the assessment history, local reassessment rules, appeal procedures, exemptions, special assessments, and whether a sale is likely to increase the assessed value. This is especially important when the purchase price is materially higher than the current assessed value, because a post-acquisition reassessment can reduce NOI and materially affect valuation.

Insurance Costs

Property insurance protects the owner against covered physical losses such as fire, wind, and hail. Some risks, such as flood, earthquake, named storm, or certain wind exposures, may require separate coverage, endorsements, higher deductibles, or specialized policies. Owners also typically carry liability coverage as part of the broader insurance program, but liability insurance protects against third-party claims rather than physical damage to the building itself. For multifamily properties, insurance has become a major underwriting issue: a Federal Reserve analysis published in FEDS Notes in September 2025 found that average multifamily property insurance costs increased from approximately $39 per unit per month in 2019 to $68 per unit per month in 2024, in real terms, an increase of about 74% over five years ($68 ÷ $39 − 1 ≈ 74%). For Ridgeline Terrace, assume 100 units and an insurance cost of $68 per unit per month → 100 × $68 × 12 = $81,600. Analysts should not simply trend the seller’s historical insurance by a normal inflation rate; they should review current premiums, renewal quotes, deductibles, coverage exclusions, lender requirements, and whether the property is in a high-risk market. Rising insurance costs directly reduce NOI unless the lease structure allows recovery from tenants: in multifamily and gross lease properties insurance is generally a landlord operating expense, while in net lease structures some or all insurance may be reimbursed by tenants, so only the unrecovered portion reduces landlord NOI.

Management Fees Scale Inversely with Property Size

Property management companies handle day-to-day operations, including leasing, rent collection, maintenance coordination, tenant communication, vendor oversight, budgeting, and reporting. Management fees are commonly calculated as a percentage of collected revenue or effective gross income. Fees often decline as property size increases because larger properties benefit from economies of scale. For Ridgeline Terrace, assume EGI of $2,209,500 and an underwritten management fee of 5% → $110,475. Even owner-managed properties should include a market-based management fee in underwriting; excluding management fees can overstate sustainable NOI. For lender underwriting, management fees are often normalized even when the borrower reports little or no actual management expense.

Repairs and Maintenance Preserve Property Value

Repairs and maintenance (R&M) covers the day-to-day costs of keeping the property functional and habitable: plumbing repairs, HVAC servicing, appliance repair, painting, landscaping, snow removal, pest control, and general upkeep. These are recurring expenses that do not materially extend the useful life of building components; that distinction separates R&M from capital expenditures. For multifamily properties, a common budgeting benchmark is $750 to $1,500 per unit per year, depending on property age, condition, and climate; older properties typically have higher R&M costs. For Ridgeline Terrace, we assume $100,000 (about $1,000 per unit per year), consistent with the operating-expense summary below.

Utility Costs

Utility expenses may include water, sewer, gas, electricity, trash removal, recycling, and other municipal or service charges. The amount paid by the landlord depends on the lease structure, metering setup, local utility rates, tenant reimbursement provisions, and the property’s physical systems. In many multifamily properties, tenants pay their own in-unit electric and gas bills if separately metered, while the landlord pays for water, sewer, trash removal, common-area electricity, and other shared systems. For Ridgeline Terrace, assume tenants pay their own in-unit gas and electricity, while the landlord pays water, sewer, common-area electric, and trash removal → $72,000. Analysts should distinguish between gross utility expense and net utility expense after tenant reimbursements, because only the unrecovered portion reduces landlord NOI.

Administrative Costs Cover the Business of Property Ownership

Administrative expenses include the recurring costs required to manage the business side of property operations: legal fees, accounting, bookkeeping, tax preparation, advertising and marketing, office supplies, software, bank fees, permits, licenses, postage, and professional services. These costs are often overlooked in preliminary underwriting because they may appear small, but they can accumulate meaningfully. For Ridgeline Terrace, assume administrative costs of $42,000 per year. Analysts should distinguish between recurring administrative operating expenses and non-recurring or capitalized costs (leasing commissions, tenant improvements, transaction costs, financing costs, and acquisition/disposition costs are generally modeled separately from NOI).

Other Expenses Capture Remaining Operational Costs

The "other expenses" category captures recurring property-level operating costs that do not fit neatly into the major categories: security services, elevator maintenance contracts, fire alarm and life-safety monitoring, access control, amenity services, pest control, and other recurring service contracts. This category should not be used to absorb costs that belong in a more specific category, nor to hide non-operating items, capital expenditures, leasing commissions, financing costs, reserves, or owner-level expenses. For Ridgeline Terrace, assume other recurring operating expenses of $30,000 per year for security, elevator maintenance, fire monitoring, and amenity services.

Operating expenses include the recurring costs required to operate and maintain the property. They generally exclude financing costs, major capital items, owner-specific tax items, and non-cash accounting charges. These excluded items are still important to investor returns, but they are usually shown below NOI in the cash flow analysis.

The following table summarizes the operating expense analysis for Ridgeline Terrace. All figures are annual.

Net Operating Income equals Effective Gross Income minus total operating expenses: $2,209,500 − $711,075 = $1,498,425. This is "standard" NOI, shown before replacement reserves, debt service, capital expenditures, leasing costs, depreciation, and income taxes.

The Operating Expense Ratio (OER) measures what percentage of effective gross income is consumed by operating expenses. For Ridgeline Terrace: $711,075 ÷ $2,209,500 = 32.2%. This means approximately 32 cents of every dollar of effective gross income is used to pay operating expenses, leaving approximately 68 cents before debt service, capital expenditures, reserves, leasing costs, and income taxes.

For many stabilized multifamily properties, a rough operating expense ratio range is approximately 35% to 50%. Properties below this range may be operating efficiently, but they may also have understated expenses, deferred maintenance, unusually low taxes, unusually low insurance, owner self-management, or expenses excluded from the model. Properties above this range may have higher taxes, insurance, utilities, payroll, maintenance needs, or service levels, but they are not automatically poor investments if the higher expense load supports stronger rents, occupancy, or tenant retention.

An OER significantly below market expectations should prompt investigation, not automatic celebration. The analyst should ask whether all expenses are properly included, whether maintenance has been deferred, whether property taxes and insurance reflect post-acquisition expectations, whether management fees are normalized, and whether utilities are correctly allocated. OER should be evaluated together with per-unit expenses, property age, location, amenity level, staffing model, lease structure, tax reassessment risk, and insurance market conditions.

Callback / preview: Here the cap rate is used as a one-year snapshot of value on the Ridgeline example. The mechanics (deriving a cap rate, and how it differs from the discount rate and the exit cap) are developed in Week 5 (Pricing & Risk).

Once Net Operating Income is calculated, investors can use a capitalization rate, or cap rate, to estimate property value. A cap rate measures the relationship between a property’s annual NOI and its market value or purchase price.

Cap Rate = NOI ÷ Property Value   |   Property Value = NOI ÷ Cap Rate

A cap rate is sometimes described as the property’s unlevered yield based on one year of NOI. "Unlevered" means the calculation ignores debt financing; it focuses on the property’s income before debt service, capital structure, income taxes, and investor-specific financing decisions.

For Ridgeline Terrace, with NOI of $1,498,425 and a purchase price of $25,000,000, the going-in cap rate is $1,498,425 ÷ $25,000,000 = 5.99%, or approximately 6.0%. This means the buyer is paying a price that produces a first-year unlevered NOI yield of approximately 6.0%, before debt service, capital expenditures, reserves, leasing costs, and income taxes.

Cap rates and values move inversely. If NOI stays the same, a lower cap rate implies a higher property value, while a higher cap rate implies a lower property value. Cap rates are affected by market interest rates, investor return requirements, property quality, location, tenant credit, lease terms, expected rent growth, expense risk, capital expenditure needs, and market liquidity.

Cap rates are useful because they provide a simple way to compare income-producing properties. However, they are limited because they usually rely on a single year of NOI. A cap rate does not fully capture future rent growth, expense growth, lease rollover, capital expenditures, debt financing, sale price, or the timing of cash flows. This limitation is why cap rates are often taught before discounted cash flow analysis: a cap rate provides a quick snapshot of current income relative to value, while a DCF model projects future cash flows year by year and discounts them back to present value. Cap rates introduce the relationship between income and value; DCF introduces the time value of money.

Preview: A cap rate is a snapshot; a DCF tells the whole story over time by discounting each year’s cash flow plus a terminal sale value. We introduce the idea here but compute it in full (terminal value, exit cap, and levered vs. unlevered flows) in Week 5 (Pricing & Risk).

In the prior section, we introduced capitalization rates as a shortcut for converting one stabilized year of NOI into value (Value = NOI ÷ Cap Rate). This is useful, but incomplete. A cap rate gives a snapshot of value based on one income figure. Real estate investors also care about how cash flows change over time, when those cash flows are received, how much capital the property will require, and what the property may sell for in the future. Discounted cash flow analysis, or DCF, addresses these questions by projecting future cash flows and discounting them back to today. The core principle is simple: a dollar received in the future is worth less than a dollar received today, because investors require compensation for time, risk, inflation, and opportunity cost.

Core DCF Formula

A simplified real estate DCF values a property as the present value of annual cash flows plus the present value of the sale proceeds at the end of the holding period:

Property Value = Σ [CF_t ÷ (1 + r)^t] + [Net Sale Proceeds ÷ (1 + r)ⁿ]

Where CF = annual property cash flow, r = discount rate or required return, n = number of periods in the holding period, and Net Sale Proceeds = estimated sale value minus selling costs and, in a levered model, any loan payoff. A DCF can be built on either an unlevered or levered basis. An unlevered DCF uses property-level cash flows before debt service; a levered DCF uses equity cash flows after debt service, financing costs, and loan payoff. The cash flows and discount rate need to match: do not use an equity return target to discount unlevered property cash flows, and do not use an unlevered discount rate to discount levered equity cash flows.

The DCF formula above is assembled from a few standard time-value-of-money (TVM) formulas, the same tools behind several practice problems in this chapter, so it helps to keep them in one place (r = periodic rate, n = number of periods):

• Present value of a single sum: PV = FV ÷ (1 + r)ⁿ.
• Present value of a level annuity: PV = PMT × [1 − (1 + r)⁻ⁿ] ÷ r.
• Future value of a level annuity, and the sinking-fund deposit: FV = PMT × [((1 + r)ⁿ − 1) ÷ r]; solving for the deposit, PMT = FV × [r ÷ ((1 + r)ⁿ − 1)].
• Deferred annuity: value the annuity as of the period before its first payment using the annuity formula, then discount that lump sum back to today using the single-sum formula.

NOI is often the starting point for a real estate DCF, but it is not always the final cash flow used in the model. A simple DCF may use NOI as annual cash flow. A more complete DCF may deduct items below NOI, such as replacement reserves, capital expenditures, tenant improvements, leasing commissions, free rent, downtime, or other costs required to maintain or re-lease the property. The key is to label the metric clearly: NOI before reserves measures recurring property operating income; cash flow after reserves reflects recurring capital needs; cash flow after leasing costs and capital expenditures gives a fuller view of property cash flow; and levered cash flow deducts debt service and financing-related costs.

Terminal Value and Exit Cap Rate

The terminal value, also called the reversion value, is the estimated sale value of the property at the end of the holding period. In many real estate DCFs, terminal value is the largest component of total value, so its assumptions matter heavily. A common method applies an exit cap rate to the property’s projected NOI in the year after sale: Terminal Value = NOI in Year After Sale ÷ Exit Cap Rate. For example, if the investor sells at the end of Year 5, the terminal value is commonly based on projected Year 6 NOI, because the buyer at the end of Year 5 is buying the future income stream beginning after the acquisition. If selling costs are included, Net Sale Proceeds = Terminal Value − Selling Costs.

Assume Ridgeline Terrace has Year 1 NOI of $1,498,425 and: NOI grows 3.0% per year; the investor holds for 5 years; the property is sold at the end of Year 5; the exit cap rate is 6.25%; selling costs are 2.0% of sale price; the unlevered discount rate is 8.0%; and the example ignores debt, capital expenditures, leasing costs, and reserves. Year 5 NOI is projected to be $1,686,491, so Year 6 NOI is $1,686,491 × 1.03 = $1,737,085. Using a 6.25% exit cap rate, Terminal Value = $1,737,085 ÷ 6.25% = $27,793,364. After 2.0% selling costs, Net Sale Proceeds = $27,793,364 × 98.0% = $27,237,497. Discounting each annual cash flow and the net sale proceeds back to today at 8.0% produces an estimated DCF value of approximately $24,861,000. Under these assumptions, an investor requiring an 8.0% unlevered return would estimate Ridgeline Terrace to be worth approximately $24.9 million. If the purchase price is below that amount, the expected return may exceed 8.0%; if above, the expected return may fall below 8.0% unless the investor can improve operations, increase NOI growth, reduce risk, or justify a lower required return.

Cap Rate vs. Discount Rate

A cap rate converts one year of NOI into value. A discount rate converts multiple future cash flows into present value. An exit cap rate estimates the future sale value of the property. These are related, but not interchangeable: the cap rate is a market pricing metric, the discount rate is the investor’s required return, and the exit cap rate is an assumption about how the market may value the property at sale.