Cash-on-Cash vs. Cap Rate, the Difference Investors Miss

Published June 19, 2026 · DSCRRadar

Cap rate and cash-on-cash return both measure rental profitability, and they’re constantly confused. The one-sentence difference: cap rate ignores your mortgage; cash-on-cash includes it.

Cap rate, the property’s yield

Cap rate = net operating income ÷ property value. It tells you the unlevered return, what you’d earn owning the place free and clear. It’s the right metric for comparing properties and markets on a level playing field.

Cash-on-cash, your actual return

Cash-on-cash = annual cash flow ÷ cash invested. It accounts for your down payment and financing. It’s the right metric for deciding whether a deal makes you money after the mortgage.

Why the gap matters in 2026

In a low-rate world, financing boosted returns and cash-on-cash often beat cap rate. In 2026’s higher-rate environment the opposite is common. A property with a healthy 6% cap rate can produce a negative cash-on-cash return once a mortgage near 6.8% is layered on with 25% down. That’s the trap the Investor Yield Index is built to expose, and why the Index counts both metrics rather than cap rate alone.

Which to use?

Screening markets and comparing deals → cap rate
Deciding if your financed deal cash-flows → cash-on-cash
Qualifying for a DSCR loan → DSCR

Run all three on your exact numbers with the investment property calculator.

DSCR calculator → Cap rate calculator → Investor Yield Index →