The return on the cash you actually invest
Cash-on-cash return strips a rental deal down to one practical question: for every dollar of your own money tied up in the property, how much spendable cash does it hand back in the first year? It starts from net operating income — the rent after vacancy and operating costs, but before financing — and then subtracts the full annual debt service, both the principal and the interest on the mortgage. What remains is the cash flow that lands in your pocket. Dividing that by the cash you put in to acquire the property turns it into a percentage you can compare against other uses of the same money.
The cash-on-cash formula
Annual cash flow = NOI − Annual debt service
Cash-on-cash return = Annual cash flow ÷ Total cash invested
where NOI is net operating income, annual debt service is the year of mortgage payments (principal plus interest), and total cash invested is the down payment plus closing costs plus any rehab or initial repairs. The result is read as a percent.
Worked example
Take a rental that produces $39,000 of net operating income a year, carries $24,000 of annual mortgage payments, and took $120,000 of cash to acquire. Here is the return on the money you actually put in:
| Step | Amount |
|---|---|
| Net operating income (NOI)annual rent after vacancy and operating costs, before financing | $39,000 |
| − Annual debt servicea full year of mortgage payments — principal plus interest | $24,000 |
| = Annual pre-tax cash flow | $15,000 |
| ÷ Total cash investeddown payment + closing costs + upfront repairs | $120,000 |
| = Cash-on-cash return$15,000 of first-year cash flow on $120,000 of your own money | 12.5% |
Computed with this calculator's default settings — open the tool above and you'll see the same numbers, then change any input to match your own deal.
Why leverage makes it diverge from the cap rate
The crucial distinction is that cash-on-cash is a leveredreturn: it reflects the mortgage, so it measures what you earn on the cash you actually committed rather than on the property's full price. Thecap rate, by contrast, ignores the loan entirely. When a property out-earns the cost of its financing — its return on assets exceeds the loan rate — borrowing amplifies the result, and cash-on-cash climbs above the cap rate. This is positive leverage: the gap between what the property yields and what the debt costs accrues to your smaller slice of invested cash. The same mechanism runs in reverse. Pile on enough debt, or borrow at a high enough rate, and the debt service can swallow the operating income, dragging cash-on-cash below the cap rate or pushing first-year cash flow negative even when the cap rate is comfortably positive.
Because both figures lean on net operating income, it is worth pinning that number down first with theNOI calculator, and sizing the loan and its payments with themortgage calculatorbefore reading too much into the percentage either tool produces.
What cash-on-cash leaves out
For all its usefulness, cash-on-cash is a first-year cash snapshot, not a total return. It says nothing about the principal paydown that quietly builds your equity as the loan balance falls, nothing about appreciation if the property gains value, and nothing about the tax effects — depreciation chief among them — that can reshape the after-tax picture. Those omitted pieces are often where much of a real estate investment's eventual return comes from. Treat cash-on-cash as the answer to a narrow, honest question about year-one cash flow, and weigh it alongside the equity build, the expected appreciation, and your own tax situation rather than as a verdict on the deal by itself.
Frequently asked questions
What is cash-on-cash return?
Cash-on-cash return is the pre-tax cash flow a rental property throws off in a year, expressed as a percentage of the actual cash you put into it. Unlike a yield on the full purchase price, it counts only the money that left your pocket — the down payment, closing costs, and any upfront repairs — so it answers a very practical question: for every dollar of my own cash tied up in this deal, how many cents of spendable cash flow does it return in the first year?
How do you calculate cash-on-cash return?
Take the annual pre-tax cash flow and divide it by the total cash invested, then express the result as a percent. Annual cash flow is net operating income minus the full annual debt service — both the principal and interest portions of the mortgage payments. Total cash invested is the down payment plus closing costs plus any rehab or initial repairs. So a property generating 9,000 dollars of cash flow on 100,000 dollars of invested cash returns 9 percent cash-on-cash.
What is the difference between cash-on-cash return and cap rate?
The cap rate is an unlevered measure: net operating income divided by the property price, ignoring any mortgage. Cash-on-cash is a levered measure: it subtracts the debt service from that income and divides by the cash you actually invested rather than the full price. Because of the loan, the two can diverge sharply. When the property earns more than the loan costs, leverage lifts cash-on-cash above the cap rate; when financing is heavy or rates are high, cash-on-cash can fall below the cap rate or even turn negative while the cap rate stays positive.
What is a good cash-on-cash return?
There is no universal threshold, and a sound answer depends on the market, the risk, and what else your cash could earn. Many rental investors look for somewhere in the high single digits to low double digits, and compare the figure against safer alternatives such as the yield on a Treasury or a cap rate on a similar unlevered property. A higher number is not automatically better either, since it can reflect more leverage and therefore more risk. The honest use of the metric is as one input, weighed against the financing terms and your own required return.
Does cash-on-cash return include appreciation or principal paydown?
No. Cash-on-cash captures only the first-year pre-tax cash flow relative to your invested cash. It deliberately excludes the equity you build as the loan balance falls, any appreciation in the property value, and tax effects such as depreciation. Those can be large parts of a real estate investment total return, so cash-on-cash should be read as a cash-flow snapshot rather than a complete measure of how an investment performs over its full holding period.
Disclaimer: This calculator is foreducation and illustration only. Cash-on-cash return is a simplified, first-year pre-tax measure that ignores principal paydown, appreciation, and taxes, and the figures it produces are not valuations of any specific property. Nothing here is investment, tax, or financial advice.