Cap Rate vs. Cash-on-Cash Return: Which Matters More?
Two rental-property metrics, two very different answers — and a worked example showing exactly where they diverge.
Cap rate measures a property's return as if you paid all cash — NOI divided by price — and ignores financing entirely. Cash-on-cash return measures the return on the actual cash you put in, after subtracting your mortgage payment. They can point in completely different directions: a property with a healthy 6.5% cap rate can produce a cash-on-cash return under 1% once a high-rate mortgage is factored in.
Run your own numbers through our cap rate calculator and cash-on-cash return calculator to see both sides of a specific deal.
Ask two real estate investors whether a deal is "good," and you might get two different answers depending on which number they're looking at. Cap rate and cash-on-cash return both try to answer "what does this property return?" — but they start from opposite assumptions about how you paid for it. Mixing them up, or worse, using only one, is one of the most common ways new investors misjudge a deal. Here's exactly what each one measures, why they diverge, and which one should drive your decision.
Cap Rate: The Unlevered Return
Capitalization rate — cap rate — measures a property's net operating income against its price, completely independent of how it's financed.
NOI is annual rental income minus operating expenses — property tax, insurance, maintenance, management fees, and a vacancy allowance — but never the mortgage payment. That exclusion is the entire point: cap rate is designed to answer "how good is this property as an asset," stripped of any specific buyer's financing decisions, so it stays comparable whether you'd pay all cash, put 10% down, or put 40% down.
This is what makes cap rate the standard metric appraisers, brokers, and commercial investors use to compare properties at a glance, and why you'll see it quoted in listings the way a stock's P/E ratio gets quoted next to its price.
Cash-on-Cash Return: What You Actually Pocket
Cash-on-cash return takes the opposite approach — it's built entirely around your specific financing.
Annual cash flow is NOI minus your actual annual mortgage payment (principal and interest). Cash invested is your down payment plus closing costs — not the full purchase price. This tells you the return on the dollars that actually left your bank account, which is the number that matters when you're deciding whether a deal beats putting that same cash into an index fund or another property.
Worked Example: Same Property, Two Different Stories
Take a $350,000 rental generating $32,400 in annual gross rent, with $9,720 in annual operating expenses:
| Metric | Calculation | Result |
|---|---|---|
| NOI | $32,400 − $9,720 | $22,680/yr |
| Cap rate | $22,680 ÷ $350,000 | 6.48% |
On paper, a 6.48% cap rate lands squarely in "good" territory. Now finance it with 25% down ($87,500) plus $7,000 in closing costs, at 6.75% on a 30-year loan:
| Metric | Calculation | Result |
|---|---|---|
| Cash invested | $87,500 down + $7,000 closing | $94,500 |
| Annual debt service | $1,702.57/mo × 12 | $20,430.84/yr |
| Effective rent (5% vacancy) | $32,400 × 0.95 | $30,780/yr |
| Annual cash flow | $30,780 − $9,720 − $20,430.84 | $629.16/yr |
| Cash-on-cash return | $629.16 ÷ $94,500 | 0.67% |
Same property, same rent roll, same expenses — but the cash-on-cash return is 0.67%, not 6.48%. Nearly the entire NOI is going straight to debt service. This isn't a bad property; it's a property financed at a rate that leaves almost no room for cash flow. A buyer who only checked the cap rate would think they'd found a solid deal. A buyer who checked cash-on-cash would immediately see the financing is the problem, not the property.
Positive vs. Negative Leverage
What happened in that example has a name: negative leverage. It occurs whenever your mortgage rate is higher than the property's cap rate — borrowing money costs more than the asset yields, so debt drags your return down below the unlevered number.
Positive leverage (mortgage rate < cap rate)
- Cash-on-cash return rises above cap rate
- Debt is amplifying your return, not eating it
- More common when rates are low relative to local cap rates
Negative leverage (mortgage rate > cap rate)
- Cash-on-cash return falls below cap rate — sometimes near zero
- Debt service consumes most or all of NOI
- Common in higher-rate environments like the one shown above
Neither situation is inherently a "mistake" — plenty of investors accept thin near-term cash flow in exchange for appreciation and equity paydown. The point is knowing which one you're in before you buy, not after.
Use cap rate when you're
- Comparing two properties as pure assets, before deciding how to finance either one
- Talking to a broker or reading listings, where cap rate is the standard shorthand
- Evaluating a deal you might buy in cash
Worth knowing: Cap rate and cash-on-cash return are only equal for an all-cash purchase. The moment you add a mortgage, they measure different things — and the gap between them is essentially a measurement of how your financing is helping or hurting the deal.
Which One Should You Trust?
Use both, for different jobs. Cap rate is the fastest way to screen and compare deals before financing enters the picture — it's the number that lets you say "Property A is a better asset than Property B" independent of how either gets paid for. Cash-on-cash is the number that tells you what a specific deal, with your specific financing, will actually put in your pocket each year. A property can pass the cap rate screen and still fail the cash-on-cash test once real financing terms are applied — which is exactly what the worked example above shows.
If you're deciding whether to buy a specific property with a specific loan quote in hand, cash-on-cash return is the more honest answer to "is this actually worth it." If you're comparing markets or shopping a list of listings, cap rate keeps the comparison clean.
Frequently Asked Questions
Is cash-on-cash return always lower than cap rate?
No, it depends on financing. When your mortgage rate is low relative to the cap rate, leverage boosts cash-on-cash above cap rate — a phenomenon called positive leverage. When your mortgage rate is high relative to the cap rate, cash-on-cash falls below cap rate, sometimes dramatically, which is negative leverage.
Which metric should I use to compare two properties?
Use cap rate to compare the underlying quality of two deals independent of how you'd finance them — it's the closer thing to an apples-to-apples comparison. Use cash-on-cash to judge what a specific deal will actually put in your pocket given your actual financing terms and down payment.
What is a good cap rate?
6-8% is commonly considered a solid, moderate-risk cap rate in most US markets, with under 4% typical in expensive, low-risk metros and 8%+ often signaling higher risk or a less competitive market. What counts as "good" varies significantly by location and asset class.
What is a good cash-on-cash return?
Many investors target 8-12% cash-on-cash return as a solid benchmark, though this depends heavily on financing terms, market, and risk tolerance. A property can have an excellent cap rate and still produce a mediocre cash-on-cash return if it's financed at a high interest rate with a small down payment.
Does cap rate ever equal cash-on-cash return?
Only for an all-cash purchase, since cash-on-cash return is defined using actual cash invested — with no mortgage, the cash invested equals the purchase price, and cash flow equals NOI, making the two metrics identical by definition.
Why did my cash-on-cash return drop so much when rates went up?
Cash-on-cash return is highly sensitive to your mortgage rate because debt service is subtracted directly from a relatively small NOI figure. A rate increase from 4.5% to 7% on the same loan amount can add thousands in annual interest, which comes straight out of cash flow — while cap rate, which ignores financing entirely, doesn't move at all.
