Cash-on-Cash Return Calculator

Cash-on-cash return measures what your money actually earns, not what the property earns

Cap rate answers “what does this property produce against its price.” Cash-on- cash return answers a more personal question: what does the cash I actually wrote a check for produce, once the mortgage is factored in. For anyone using financing rather than paying cash, this is the number that actually determines whether the deal was worth doing.

The mechanics: total cash invested is the down payment plus closing costs plus any rehab spent before renting, and annual cash flow is what is left of the rent each month after operating expenses and the mortgage payment, multiplied by twelve.

Why leverage changes everything about this number

The same property produces a different cash-on-cash return depending entirely on how it is financed, which is the opposite of how cap rate behaves.

A larger down payment reduces the mortgage payment, which raises monthly cash flow. But it also increases the total cash invested, and that denominator often grows proportionally faster than the cash flow improves. The result is counterintuitive to newer investors: putting more money down frequently lowers the cash-on-cash return even as it lowers the monthly payment and the risk of the deal.

This is the essential leverage trade-off in real estate. A smaller down payment concentrates a smaller amount of capital against the same income stream, which can produce a dramatically higher percentage return — with the corresponding downside that a smaller equity cushion means less room to absorb a vacancy or a rate increase on a variable loan.

What belongs in total cash invested

Getting this figure right matters as much as getting the cash flow right, because an understated total cash invested inflates the return.

Include the down payment, every closing cost associated with the purchase, and any rehab or repair spending completed before the property is placed in service and rented. Do not include ongoing capital expenditure reserves — those affect monthly cash flow calculations, not the initial capital outlay this metric is measuring.

A common shortcut that overstates returns: ignoring closing costs entirely, or excluding rehab spent to get a unit rent-ready. Both are real cash that left your account before the first rent check arrived, and both belong in the denominator.

Reading a negative cash-on-cash return correctly

A negative number means the property costs more to hold each month than it brings in, once financing is included — and it is worth being precise about what that does and does not mean.

It does not automatically mean the deal is bad. Some investors accept negative cash flow in a strong-appreciation market, betting on equity growth rather than monthly income, particularly in expensive coastal markets where cash-flowing deals are rare. What it does mean is that the investment thesis has shifted entirely to appreciation, and that is a materially different and riskier bet than one built on cash flow — appreciation is not guaranteed in any given holding period, while contracted rent, properly underwritten, is close to it.

If the number here is negative and appreciation was not the plan going in, that is the calculation telling you the deal does not work as priced.

The financing decision this number is built to test

Because cash-on-cash return responds directly to the loan terms, it is the right tool for comparing financing options on the identical property — a 25 percent down conventional loan against a 20 percent down loan at a slightly higher rate, for instance.

Run the same purchase price, rent and operating expenses through both scenarios and compare the resulting cash-on-cash returns side by side. The loan that produces the higher return is not automatically the better choice — a smaller down payment also means a smaller equity cushion and a larger mortgage payment eating into cash flow if rent softens — but seeing both numbers side by side turns a financing decision from a gut feeling into an actual comparison.

Where this fits with the other return metrics

Cash-on-cash return is the second step in a three-step underwriting sequence, and it should never stand alone.

Start with the cap rate calculator to screen the asset against its market independent of financing. Layer in the actual loan terms here to see the return on the capital you would really invest. Then move to the full rental cash flow calculator, which adds vacancy, maintenance, management and capital expenditure reserves on top of the mortgage payment already included here — the number that determines what genuinely lands in your account each month, after every real cost a property incurs rather than just the obvious ones.

For an investor using the BRRRR strategy specifically, the BRRRR calculator extends this further by modeling what happens to invested capital once a refinance pulls some or all of it back out.