Cap Rate vs. Cash-on-Cash Return: What's the Difference?

These two metrics get confused constantly, largely because they sound similar and both measure "return" — but they answer genuinely different questions.

The Core Difference, in One Line

Cap rate measures return on the property, ignoring financing. Cash-on-cash return measures return on your actual cash invested, including financing.

Cap Rate: The Unleveraged View

Cap Rate = NOI ÷ Purchase Price

This tells you how the property performs as if you paid all cash — no mortgage, no leverage. It's useful for comparing properties on a level playing field, regardless of how each one might be financed.

Cash-on-Cash Return: The Real-World View

Cash-on-Cash Return = Annual Cash Flow ÷ Total Cash Invested

Here, "annual cash flow" is what's left afteryour mortgage payment, and "total cash invested" is your actual out-of-pocket money — down payment, closing costs, any rehab costs. This tells you the return on the actual dollars you put into the deal.

Why They Can Tell Very Different Stories

Here's where it gets interesting: a property can have a strong cap rate but a weak cash-on-cash return, or vice versa, depending on financing.

Example: A $300,000 property with an 8% cap rate generates $24,000 in NOI. If you put 20% down ($60,000) and your mortgage payment eats $18,000 a year, your annual cash flow is $6,000.

Cash-on-Cash Return = $6,000 ÷ $60,000 = 10%

In this case, leverage actually boostedyour return above the cap rate — a common outcome when the cost of debt is lower than the property's unleveraged return, sometimes called "positive leverage."

But flip the interest rate higher, and the math can reverse — a mortgage payment that eats too much of the NOI can drag your cash-on-cash return belowthe cap rate. That's why looking at just one of these numbers can be misleading.

Use Both, Not Just One

A responsible underwriting process looks at cap rate to judge the property itself, and cash-on-cash to judge the actual deal you're personally financing. Neither number alone tells the whole story.

Both Calculated Automatically, Formula Included

Aurum Reserve calculates both cap rate and cash-on-cash return for every deal, alongside DSCR, annual cash flow, and a full year-by-year projection — with every formula shown so you can verify the math yourself, not just trust the output.