Cash-on-cash return shows how much yearly profit you earn on the actual cash you put into a property. It answers a simple question: for every dollar I invest, how much comes back each year?
Why this number feels personal
Most rental measures look at the whole property. Cash-on-cash looks at you — the real money that left your bank account. That makes it the number most owners check first, because it tells you what your own savings are doing. If you could leave that money somewhere safer and earn a similar return, the rental had better be worth the extra effort and risk. Cash-on-cash gives you a fair way to make that comparison instead of guessing.
The formula
Cash-on-cash return = yearly cash flow ÷ cash invested.
Yearly cash flow is the money left over after a full year of rent minus all costs, including your mortgage payment. Cash invested is the real money you put down — your down payment plus closing costs and any upfront repairs.
A worked example
Imagine you buy a rental and put in 50,000 of your own cash (down payment, closing costs, and a few fixes).
- After a year of rent minus all costs and the mortgage, you have 5,000 left over.
- Cash-on-cash return = 5,000 ÷ 50,000 = 0.10, or 10%.
That means your invested cash earned about 10% that year.
Walk through the pieces so the number feels real. The 50,000 is everything it took to get the keys: the down payment, the closing costs, and the small fixes you paid for. The 5,000 is the true leftover after a whole year of running the rental — rent collected, then every bill and the mortgage paid. Dividing the leftover by the cash you put in turns it into a clean percent you can compare with any other use of that money.
How it differs from cap rate
Cap rate ignores your loan and uses the full price. Cash-on-cash includes your loan and uses only the cash you actually put down. Because most buyers borrow most of the price, cash-on-cash is often the more personal number — it reflects your real out-of-pocket investment.
Why it is useful
It lets you compare a rental against other places you could park your money. If a property returns less than you would expect elsewhere for the risk, you may want to keep looking or negotiate a better price. It also shows the power of a smaller down payment: putting in less cash can raise the percent, though it usually means a bigger loan and a higher monthly payment, so weigh both sides.
How Underlisted helps
Cash-on-cash return is one of our free calculators. Enter your rent, costs, loan, and cash in, and we show the percent for you. You can check any home free and try a few down-payment amounts to see how each one changes your return.
Takeaway: cash-on-cash = yearly cash flow ÷ cash invested. It tells you what your real money is earning.