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OCC Comptroller’s Handbook: Commercial Real Estate LendingInternal rate of return (IRR) is the annualized return that ties together every dollar a property moves: your initial investment, the cash flow each year, and the lump sum when you sell or refinance. Formally, it is the discount rate that makes the present value of all those cash flows net to zero. In plain terms, it answers 'what yearly rate did my money actually earn, given when each dollar arrived?'
IRR's strength is that it respects timing. A dollar collected in year one is worth more than the same dollar in year ten, and IRR builds that in, which makes it the standard yardstick for comparing a rental against other multi-year investments. Its weakness is that it assumes you can reinvest interim cash flows at the same rate and can behave oddly with unusual cash-flow patterns, so read it alongside the equity multiple, which ignores timing but shows total dollars returned.
IRR solves a cash-flow equation
Internal rate of return is the discount rate r that makes net present value equal zero: Σ CFₜ ÷ (1 + r)ᵗ = 0. For annual cash flows of −$100,000 at Year 0, then $8,000, $9,000, $10,000, $12,000, and $135,000 at Years 1 through 5, a deterministic bisection solver produces an annual IRR of 13.4413%. Substituting that rate into the stated annual-period equation yields an NPV within rounding distance of zero.
| Period | Cash flow | Interpretation |
|---|---|---|
| Year 0 | −$100,000 | Initial equity outflow |
| Year 1 | +$8,000 | Operating distribution |
| Year 2 | +$9,000 | Operating distribution |
| Year 3 | +$10,000 | Operating distribution |
| Year 4 | +$12,000 | Operating distribution |
| Year 5 | +$135,000 | Distribution including modeled exit proceeds |
| Solved IRR | 13.4413% | Annual intervals; NPV = 0 within solver tolerance |
Timing sensitivity is useful and dangerous
Moving the same dollars earlier generally raises IRR; delaying them lowers it. Exit value, sale date, refinancing, capital calls, and interim distributions therefore need explicit dates and sources. Irregular dates require an XIRR-style method rather than silently treating them as equal periods.
IRR can have multiple or no economically useful solutions when cash-flow signs change more than once. It also does not show absolute wealth created, scale, liquidity, risk, or whether interim proceeds can be reinvested at the computed rate. Compare NPV, equity multiple, duration, and assumptions alongside IRR rather than reading it as a guaranteed annual return.
Rental-property decision: audit the modeled exit before comparing IRRs
For a rental acquisition, connect Year 0 to closing and initial capital records, annual distributions to property cash-flow reports, later capital calls to approved project funding, and the final $135,000 to a sale bridge showing price, costs, debt payoff, and equity proceeds. Recalculate IRR under a later sale, lower price, higher capital need, and delayed distribution before comparing it with another property.
A common misuse is quoting 13.4413% as though the property earned that rate each year. The example has uneven annual distributions and a large modeled exit; the single solved rate summarizes that complete sequence. Changing the exit assumption can move the result even when current operations are unchanged, so the cash-flow table and scenario record belong beside the percentage.
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Written and maintained by the Aptoria editorial teamEditorial method reviewed July 28, 2026. Aptoria reviews scope, source fit, examples, limitations, links, and publication gates. This record does not claim attorney, CPA, lender, appraiser, or other independent professional sign-off.
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Related terms
Investing metrics
Equity multiple
The total dollars a property returns to you divided by the total dollars you invested, shown as a multiple like 2.0x over the whole hold.
Investing metrics
Cash-on-cash return
The annual pre-tax cash flow a property produces divided by the actual cash you invested in it.
Investing metrics
Cash flow
The cash left over each period after all income is collected and all expenses — including the mortgage — are paid.
Investing metrics
Capitalization rate (cap rate)
Capitalization rate is annual net operating income divided by a stated property price or value, expressed as a percentage.
Investing metrics
Pro forma
A forward-looking financial projection of a property's income, expenses, and returns — an estimate, not a record of actual results.
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