Cap rate tells you what a property yields unlevered. Cash-on-cash tells you what your money earns after the mortgage — which, for a leveraged investor, is the number that actually matters. It is also the metric most sensitive to how a deal was financed, which is why two investors can buy the identical property and post very different returns.
The formula
Cash-on-Cash = Annual Pre-Tax Cash Flow ÷ Total Cash Invested. Cash flow is NOI minus debt service. Cash invested is down payment plus closing costs plus any up-front rehab — every dollar that left your account. A property with $57,200 of NOI and $41,000 of annual debt service produces $16,200 of cash flow; against $196,000 of cash in, that is an 8.3% cash-on-cash return.
Why it diverges from cap rate
Leverage. When the borrowing rate sits below the cap rate, cash-on-cash exceeds the cap rate — positive leverage magnifying the return on a smaller equity base. When the borrowing rate sits above the cap rate, cash-on-cash falls below it and can go negative while the property still shows a healthy cap rate. A 6% cap financed at 7.5% produces exactly that outcome, which is the arithmetic a lot of investors met the hard way as rates rose.
The mistake: forgetting it is a first-year snapshot
Cash-on-cash measures one year against one moment of investment. It does not account for principal paydown building equity, appreciation, tax benefits from depreciation, or rent growth over the hold. A property posting a modest 5% cash-on-cash in year one may be producing a far better total return by year five. Conversely, a strong first-year figure achieved by deferring maintenance is borrowing from year three.
What to include in cash invested
Down payment, closing costs, lender fees and points, inspection and appraisal, initial rehab, and any reserve the lender required you to fund. What not to include: financed amounts, and the property’s own subsequent cash flow reinvested. Investors who count only the down payment overstate the return, sometimes by two or three percentage points.
Using it to compare financing structures
This is where cash-on-cash earns its keep. Model the same purchase at 20%, 25% and 30% down; model it interest-only against fully amortising. Higher leverage raises cash-on-cash when leverage is positive, and lowers your DSCR at the same time — so the structure that maximises return and the structure that qualifies may not be the same one. The cash flow calculator makes that trade-off visible before you commit to a term sheet.
Cash-on-Cash Return FAQ
It depends on market, leverage and risk. Many buy-and-hold investors target the high single digits; value-add investors accept less initially in exchange for a larger exit. Judge it against what the same cash would earn elsewhere at comparable risk.
No. Cash-on-cash captures only cash flow against cash invested. Total return also includes principal paydown, appreciation and tax effects.
Convention is pre-tax, because tax outcomes vary by investor. Just be consistent when comparing deals.
Yes, whenever debt service exceeds NOI. That is not automatically a bad deal — some value-add and appreciation plays run negative early — but it must be intentional and funded.
Yes, and with no debt service it converges on the cap rate, with small differences from closing costs and capital items.
It raises cash-on-cash by removing principal from the payment, which also improves DSCR. The trade is no amortisation, so equity builds only through appreciation and you face the full balance at the end of the interest-only term.