Ask two investors which metric matters and you will get an argument. It is a false fight. Cap rate and cash-on-cash return are not competing answers to one question — they are answers to two different questions, and the interesting part is what happens when they disagree.
The two formulas, and the one word that separates them
Cap rate = net operating income ÷ purchase price. NOI is your rent after vacancy, minus every operating expense — property tax, insurance, maintenance, management, repairs — but not your mortgage and not income tax.
Cash-on-cash = annual pre-tax cash flow ÷ total cash invested. Cash flow is that same NOI minus your annual mortgage payments. Cash invested is your down payment plus closing costs plus any rehab.
The entire difference is financing. Cap rate excludes your loan on purpose, so it describes the building itself — which is what makes it the only fair way to line two properties up side by side. Cash-on-cash includes your specific loan and counts only your own money, which is what makes it the honest measure of whether your capital is well deployed. Two investors can buy the identical building — identical cap rate — and post wildly different cash-on-cash returns purely on the strength of their loans.
The most useful thing this comparison reveals
Put the cap rate next to your mortgage rate. That single comparison tells you whether debt is working for you or against you.
- Cap rate above your mortgage rate → positive leverage. The property out-earns the cost of the money, so borrowing amplifies your return and cash-on-cash rises above the cap rate.
- Cap rate below your mortgage rate → negative leverage. The property earns 4% while the debt costs 7%. Every borrowed dollar drags your return down, and cash-on-cash falls below the cap rate.
Negative leverage is not automatically disqualifying — it describes a large share of the Canadian market and most of India's metros, where investors knowingly accept a monthly deficit in exchange for appreciation. But it should be a decision, not a surprise. If you are running negative leverage, you are betting on price growth, and you should say so out loud.
When to reach for which
Use cap rate when you are comparing
Screening a list of properties, benchmarking against the local market, or valuing a building — cap rate is the tool. Because it strips out financing, it is the only way to compare a cash purchase against a 75%-leveraged one without the loan structure contaminating the answer. The site's cap rate calculator shades 5–8% as the healthy band for US residential rentals — a rule of thumb, not a statistic. For reference, CBRE put the US average core multifamily going-in cap rate at 4.73% in Q3 2025, a figure for institutional Class A apartment buildings rather than single rental houses.
Use cash-on-cash when you are deciding
Once a specific property and a specific loan are on the table, cash-on-cash answers the practical question: for every dollar of my money in this deal, how much comes back in year one? Most investors treat 8–12% as healthy for a residential rental. Below roughly 8%, a hands-on rental struggles to justify itself against simpler passive alternatives once you price in the work and the risk.
What both of them quietly ignore
Here is the part that gets skipped. Cap rate and cash-on-cash are both year-one snapshots of current income. Neither one accounts for:
- Appreciation — often the largest component of total return, and entirely absent from both.
- Mortgage paydown — tenants converting your debt into equity every single month.
- Rent growth — the reason a break-even property in year one can cash-flow well by year five.
- Taxes — depreciation, recapture, and capital gains all sit outside both formulas.
This is exactly why a low-cap-rate coastal property can beat a high-cap-rate Midwest one on total return, and why arguing about which snapshot is superior misses the point. To see the whole picture you need a multi-year pro-forma and an IRR, which folds every year of cash flow plus the eventual sale into a single annualized number.
The short version
Screen with cap rate. Decide with cash-on-cash. Check the lender agrees with DSCR. Then judge the actual investment with IRR over your real hold period. Any one of those numbers alone will mislead you — reliably, and in a predictable direction.
One number: 6.71% versus 4.73%. That's Freddie Mac's 30-year mortgage average for the week of 09/03/2026 against CBRE's national going-in cap rate for core multifamily, H2 2025. At those two benchmarks, financed multifamily runs negative leverage nationally — and the same math scales down to a specific $350,000 property below, where DSCR fails outright at the identical rate.
The gap that makes this comparison worth having
Two figures, checked the same week, describe the same market from opposite sides. Freddie Mac's Primary Mortgage Market Survey put the 30-year fixed average at 6.71% for the week ending 09/03/2026 (15-year: 6.04%). CBRE's H2 2025 U.S. Cap Rate Survey put the national going-in cap rate for core multifamily — the closest thing to an institutional benchmark this market has — at 4.73%, with an average exit cap of 4.95%.
Put those next to each other and the conclusion is unavoidable: at national averages, borrowing to buy stabilized multifamily costs more than the asset yields unlevered. That's negative leverage, defined precisely — cap rate below the mortgage rate — and it isn't a fringe scenario or a badly negotiated deal. It's what the two most-cited national benchmarks say about the market as a whole, the week this page was checked.
The same fact, run through one $350,000 property
CBRE's 4.73% describes institutional Class A core multifamily — a different tier from a single small rental, so it isn't a number you can apply directly to your own deal. But the negative-leverage pattern holds even at a smaller scale with a higher, more representative cap rate. Take the $350,000 / $2,500-a-month property used throughout this site's investment calculators: manual-mode cap rate (5% vacancy, $9,000 in operating expenses) comes to 5.57% — a full 84 basis points above CBRE's institutional figure, reflecting the extra risk premium a small, self-managed deal typically commands. It is still below 6.71%.
| Metric | Result | What it means |
|---|---|---|
| Cap rate (unlevered) | 5.57% | Below the 6.71% cost of debt — negative leverage |
| Cash-on-cash (25% down, $101,500 invested) | −0.83% | Levering the deal makes the return worse, not better |
| DSCR (targeting 1.25×) | 0.96 | Fails even the lenient 1.0 break-even floor — a lender declines this loan as structured |
Cap rate, cash-on-cash and DSCR figures reproduced from this site's own calculator modules using their shared $350,000/$2,500/$9,000-opex/$262,500-loan prefill; see the cap rate, cash-on-cash and DSCR calculators for the full step-by-step arithmetic.
All three numbers are downstream of the same 6.71%-versus-5.57% gap. Cap rate flags it in the abstract; cash-on-cash converts it into an actual dollar loss; DSCR turns it into a lender's decline. That progression — property, then position, then lender — is the whole relationship between these metrics in one example.
The tax mechanics both ratios are silent on
Neither cap rate nor cash-on-cash accounts for depreciation, and it's worth being specific about why that omission can matter even on a negative-leverage deal. IRS Publication 527 requires residential rental property to be depreciated straight-line over 27.5 years under the mid-month convention, and only the building — land is never depreciable. Pub 527's own worked example allocates basis 85% to the building and 15% to land. Applied to the $350,000 property above, that would put building basis at $297,500 and straight-line depreciation at $297,500 ÷ 27.5 = $10,818 a year, before the mid-month convention trims the first partial year.
That deduction doesn't show up in cash-on-cash — it isn't a cash cost — but it can shelter other taxable income. IRS Publication 527 also describes a passive-activity special allowance of up to $25,000 (or $12,500 married filing separately and living apart) for taxpayers actively participating in the rental, available in full at modified AGI up to $100,000 ($50,000 MFS), phasing out 50 cents per dollar above that and disappearing entirely above $150,000 ($75,000 MFS). An investor within that income band who is running a small negative cash-on-cash return, as in the worked example above, may still be able to deduct depreciation against other income — a real offset that neither ratio on this page reflects.
The other side of that ledger arrives at sale. Depreciation taken over the hold reduces basis, and the gain attributable to it — unrecaptured Section 1250 gain — is taxed, per IRS Topic 409, "at a maximum 25% rate," not a flat 25%. The deduction that offsets income today is partly a deferral, not a permanent shelter, and any full accounting of a negative-leverage deal has to net the two against each other rather than counting the depreciation benefit alone.
When running negative leverage is a decision worth making
None of this makes the worked example above a bad investment by default — it makes it a decision that should be named, not discovered by accident. An investor who understands the −0.83% cash-on-cash figure, confirms the DSCR failure with their lender before writing an offer, and has modeled the depreciation shelter and the eventual recapture is making an informed appreciation bet. An investor who only checked the cap rate against a national headline and assumed the loan would obviously be approved is not.
The practical sequence is the one this site's calculators are built around: screen with cap rate, decide with cash-on-cash, confirm the loan actually clears with DSCR, and only then reach for the tax mechanics above to judge whether the after-tax picture changes the answer.
Methodology
The cap rate, cash-on-cash, and DSCR figures in this entry are reproduced directly from this site's own cap-rate, cash-on-cash, and DSCR calculator modules, using their shared $350,000 purchase price / $2,500 monthly rent / $9,000 annual operating expenses / $262,500 loan prefill, financed at Freddie Mac's PMMS 30-year average for the week ending 09/03/2026. The depreciation figure applies IRS Publication 527's own 85%/15% building-to-land worked ratio to that same $350,000 price; it illustrates the mechanism, not a claim about this specific property's actual basis allocation, which requires an appraisal or assessor's ratio.
Sources
- Freddie Mac — Primary Mortgage Market Survey, week ending 09/03/2026 — accessed 2026-09-07
- CBRE — U.S. Cap Rate Survey, H2 2025 — accessed 2026-09-07
- IRS Publication 527 — Residential Rental Property — accessed 2026-09-07
- IRS Topic No. 409 — Capital Gains and Losses — accessed 2026-09-07