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Rental Property ROI & Cap Rate Calculator

Cap rate, cash-on-cash return, gross yield, and monthly cash flow for a rental property — computed instantly. Most "free" versions of this tool are lead magnets for a property management SaaS or ask for your email before showing results; this one doesn't, because it isn't trying to sell you anything else.

Cap rate and NOI are calculated the standard way: independent of financing (no mortgage payment included) — that's what makes cap rate comparable across an all-cash vs. financed purchase. Cash flow and cash-on-cash return DO include the mortgage payment, since that's real money leaving your pocket each month.

How it works

NOI and cap rate deliberately exclude the mortgage payment — that's the standard real-estate convention, since cap rate is meant to measure a property's return independent of how it's financed, keeping an all-cash purchase and a financed one comparable on the same basis. Cash-on-cash return and monthly cash flow, by contrast, do subtract the mortgage payment, since that's money actually leaving your pocket every month.

FAQ

Why is my cap rate different from my cash-on-cash return?
They measure different things — cap rate is NOI divided by the purchase price and ignores financing entirely, while cash-on-cash return is annual cash flow after the mortgage divided by your actual cash invested, so leverage can push cash-on-cash well above or below the cap rate.
Does this require an email address to see the results?
No — every figure recalculates instantly as you type, with nothing sent anywhere, which is a deliberate departure from the many "free" rental calculators that gate results behind a lead-capture form.

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