Triangulation & Taxes: 47 Key Terms

By Devon Coombs, CPA, MBA · Teaching Professor of Finance, Santa Clara University · Reviewed August 2026

Triangulation refers to checking a valuation against independent evidence, such as a broker opinion of value, before committing to a decision, while taxation determines how much of a property's return an investor actually keeps. Terms in this area range from valuation checks such as appraisal smoothing and the BOV to tax concepts such as adjusted basis, after-tax cash flow, cost segregation, and the cost recovery period. Week 6 of the free Real Estate Finance course pairs these two topics because a deal is generally judged on its after-tax results rather than its pre-tax pro forma. This vocabulary helps an analyst verify a value and measure what remains once taxes are applied.

These terms are taught in Week 6: How Do We Decide and Check Our Work? Triangulation, Decisions & Taxes of the free Real Estate Finance course; the full course glossary collects every chapter in one place.

active income: Wages and income from businesses in which the taxpayer materially participates, a separate bucket from passive and portfolio income under the Section 469 rules.
adjusted basis: Original cost basis plus capital improvements minus accumulated depreciation. At sale, gain equals amount realized minus adjusted basis, so depreciation, by reducing basis, increases taxable gain.
after-tax cash flow: Cash flow after debt service minus taxes, or plus tax savings when taxable income is negative and the loss is currently usable against other passive income. Abbreviated ATCF.
amount realized: The sale price net of selling costs, the starting point for measuring taxable gain at disposition.
appraisal smoothing: Lag and dampening in appraisal-based indices (such as NCREIF’s) relative to actual market movements, because appraised values update slowly and trail closed-transaction pricing at turning points.
ATCF: After-Tax Cash Flow: cash flow after debt service minus tax paid, or plus tax savings when the year’s taxable income is a usable loss.
BOV: Broker Opinion of Value: a broker’s informal estimate of value carrying current market intelligence but no appraisal standing.
broker opinion of value: A broker’s informal estimate of value (a BOV) reflecting current market intelligence on bids, concessions, and failed deals. Useful market evidence, but not an appraisal, so evaluate it for bias.
cash-out refinance: A new, larger loan that retires the existing balance and distributes the difference as borrowed cash to the owner. Generally not taxable because borrowed money must be repaid; it raises debt service and equity risk.
cost recovery period: The statutory depreciation life: generally 27.5 years for residential rental property and 39 years for nonresidential (commercial) real property under GDS, recovered straight-line with the mid-month convention.
cost segregation: A study that carves shorter-lived personal-property and land-improvement components out of a building so they can be depreciated over shorter, accelerated recovery periods instead of the 27.5- or 39-year building life.
dealer property: Real estate held primarily for sale to others: inventory for flippers, condo converters, and subdividers. Gains are taxed as ordinary income, with no depreciation and no capital-gain treatment regardless of holding period.
deferral benefits: Tax advantages from postponing tax rather than avoiding it: principally depreciation, like-kind exchanges (Section 1031), and Opportunity Zone reinvestment. The tax returns later, often at sale.
depreciable basis: The portion of original cost basis allocated to improvements; land is excluded because it is not depreciable. The worked deal’s 80% allocation of a $30M basis is $24,000,000 of depreciable building basis.
depreciation recapture: Gain at sale attributable to prior depreciation deductions, taxed ahead of ordinary capital-gain treatment. For real property it is unrecaptured Section 1250 gain, taxed at a maximum 25% federal rate.
GRM: Gross Rent Multiplier: price ÷ gross annual rent. A quick screen for smaller rental properties; ignores vacancy, operating expenses, and income quality.
gross rent multiplier: A blunt quick screen for small rental properties: price ÷ gross annual rent. A $5M property with $500,000 of gross rent is a 10.0x GRM. Ignores vacancy, expenses, and income quality.
historic rehabilitation credit: A federal tax credit generally equal to 20% of qualified rehabilitation spending on certified historic structures used in an income-producing activity, claimed ratably over five years under current rules.
hold-versus-sell analysis: A marginal decision measured from today forward: compare today’s net sale proceeds against the return from staying invested. The original purchase price is sunk and excluded from the economics.
investment property: Real estate held for appreciation, such as raw land, a capital asset producing capital gain or loss on sale, generally with no depreciation absent business use.
investment value: The maximum price a specific investor can pay and still earn their required return, given that buyer’s assumptions, financing, strategy, and tax position. In the worked deal, $29,489,486 at a 7.5% unlevered hurdle.
like-kind exchange: A Section 1031 exchange: a deferral mechanism that rolls gain on qualifying business or investment real estate into replacement property if strict timing and identification rules are met. Defers tax; does not erase it.
market value: The most probable price a property should bring in a competitive and open market under normal sale conditions. An opinion of the most probable price, not a guarantee of the exact transaction price.
MIRR: Modified Internal Rate of Return: uses realistic, separate financing and reinvestment rates instead of IRR’s own rate. Repairs IRR’s reinvestment assumption, mattering most when interim cash flows are large or the IRR is high.
modified internal rate of return: MIRR: a return measure that replaces IRR’s implicit reinvestment-at-the-IRR assumption with explicit, separate financing and reinvestment rates. On the worked deal, 8.41% at a 5.0% reinvestment rate versus an 8.57% IRR.
NCREIF: National Council of Real Estate Investment Fiduciaries: publisher of the appraisal-based NCREIF Property Index (NPI) of institutional property returns.
NCREIF NPI: The NCREIF Property Index: a quarterly, appraisal-based index of institutional U.S. commercial real estate performance dating to 1977. Useful for trend context, but it can lag turning points and show appraisal smoothing.
NPI: NCREIF Property Index: a quarterly, appraisal-based benchmark of institutional commercial real estate returns. Appraisal-based, so it can lag market pricing.
original cost basis: Purchase price plus capitalized acquisition costs, the starting point for both depreciation and the eventual gain calculation.
passive activity loss rules: The Section 469 rules that confine passive losses to passive income, suspending and carrying forward the excess until passive income arises or the activity is sold in a fully taxable disposition.
passive income: Income from rental real estate and from businesses without material participation. Passive losses generally offset only passive income, even when the owner manages the rental actively.
personal residence: A home held for the owner’s own use. No depreciation; a limited gain exclusion on sale; interest and property-tax deductions subject to limits.
portfolio income: Interest, dividends, and gains on securities, a bucket separate from passive income. Passive losses do not shelter portfolio income.
price per square foot: A quick-check metric for office, retail, and industrial pricing: price ÷ rentable or gross building area. Confirm the square-footage basis is consistent before comparing.
price per unit: A multifamily quick-check metric: price ÷ number of units. A $36,000,000 ask on 120 units is $300,000 per unit, compared against recent comparable trades to flag an aggressive price.
RCA: MSCI Real Capital Analytics: transaction-based data on commercial sales (generally above $2.5 million), including prices, volume, and cap-rate evidence. Avoids appraisal smoothing but reflects only assets that actually traded.
reinvestment assumption: IRR’s built-in premise that interim cash flows compound at the IRR itself, often unrealistic for high IRRs or large early distributions. The flaw MIRR repairs with an explicit reinvestment rate.; NPV vs IRR IRR vs MIRR
Section 1031: The like-kind exchange provision: defers gain on qualifying business or investment real estate by rolling it into replacement property under strict, time-sensitive rules.
Section 1231: The trade-or-business property class. Its signature asymmetry: net gains receive capital-gain treatment while net losses are deductible against ordinary income.
Section 1231 property: Real estate used in a trade or business, including rental operations, held over one year. Depreciable, with a taxpayer-friendly asymmetry: net gains are taxed as capital gains, net losses are deductible as ordinary losses.
suspended losses: Passive losses disallowed in the current year and carried forward until released by passive income or by a fully taxable disposition of the entire activity to an unrelated party.
tax shelter: Cash income shielded from current tax, principally by the depreciation deduction, which reduces taxable income without a current cash outlay. Generally a deferral, with the tax surfacing at sale.
trade or business property: Real estate used in a trade or business, including rental operations, the Section 1231 class. Depreciable, with capital-gain treatment on net gains and ordinary-loss treatment on net losses.
triangulation: Building a defensible value range from multiple independent approaches and metrics (income, sales comparison, and cost) rather than trusting one number. Convergence builds confidence; divergence flags where assumptions need scrutiny.
unrecaptured Section 1250 gain: The depreciation-attributable slice of gain on real property, taxed at a maximum 25% federal rate for individuals, favorable to the 35% ordinary rate that valued the deductions, and deferred until sale.
up-front financing costs: Loan fees amortized over the contractual loan term (not the amortization schedule), with the unamortized balance deducted against ordinary income when the loan is retired.
USPAP: Uniform Standards of Professional Appraisal Practice, published by The Appraisal Foundation. Requires a scope of work sufficient for credible results and reconciliation of the approaches applied, not every approach in every assignment.

More Real Estate Finance term guides

Put the vocabulary to work: the free calculators and decision guides apply these terms, and the free Real Estate Finance course teaches them in context.