Cap Rate vs Cash-on-Cash Return: When to Use Each Metric

Ask ten landlords how a property is doing and most will quote either a cap rate or a cash-on-cash figure. They answer different questions, and confusing them leads to poor decisions.

Why metrics matter

Metrics let you compare properties consistently and quickly. Each one has blind spots, so knowing what a number leaves out is as important as knowing what it measures.

Cap rate

Cap rate equals net operating income divided by purchase price or value. It describes the property's income relative to its price, ignoring how you finance it.

Example: $9,000 NOI on a $120,000 property equals a 7.5 percent cap rate.

Cash-on-cash return

Cash-on-cash return equals annual pre-tax cash flow divided by the total cash you invested (down payment, closing costs, and upfront repairs).

Example: $2,400 of annual cash flow on $32,000 invested equals 7.5 percent.

The core difference

Cap rate measures the property. Cash-on-cash return measures your investment in it, including the effect of your loan.

Financing changes the picture

One building, bought by two people with different loans, can show two very different results based on interest rate, down payment, and loan term. Higher rates can push cash-on-cash below the cap rate; favorable financing can push it above.

When cap rate is useful

• Comparing properties or markets regardless of financing.
• Quickly screening many deals.
• Estimating value for income properties.
• Tracking how a property performs over time.

When cash-on-cash is useful

• Measuring the return on your own money.
• Comparing financing options for the same property.
• Planning how capital will grow across a portfolio.

Common mistakes

• Using seller NOI that omits expenses.
• Comparing cap rates across very different property types or locations.
• Ignoring capital reserves in either metric.
• Treating either number as a forecast rather than an estimate.

Limits

Cap rate ignores financing, appreciation, and tax effects. Cash-on-cash ignores loan paydown, appreciation, and the timing of future cash flows.

Use both

Screen with cap rate, then decide with cash-on-cash, coverage ratio, and a stress test. The S8 Atlas Deal Analysis tool shows multiple metrics for each listing so you can see the full picture.