Cash-on-Cash Return Calculator

Why Cash-on-Cash Return Is the Investor's Reality Check

Cash-on-cash return answers the question most individual investors actually care about: of the money I personally wrote a check for, how much am I getting back each year? Unlike cap rate, which treats every deal as if it were bought in cash, this metric puts your mortgage back into the picture — because for most investors, the mortgage is exactly what makes a deal affordable in the first place, and exactly what determines whether it produces real cash flow or just breaks even on paper.

That makes cash-on-cash return the more personal of the two metrics. Two investors buying the identical property with different down payments and different loan terms will get two different cash-on-cash numbers — which is the point. It's measuring your specific deal, not the property in the abstract.

How to Use This Calculator

This metric is sensitive to financing details, so precision here pays off:

1. Purchase price, down payment, and closing costs

Use your actual planned down payment percentage, not a round number, since it directly sets both your cash invested and your loan amount — the two halves of this entire calculation.

2. Mortgage rate and term

Use a rate you've actually been quoted where possible. Because debt service is subtracted directly from NOI, even a half-point difference in rate can move your cash-on-cash return by a meaningful amount.

3. Upfront rehab

Include any repairs or updates you'll pay for before the property starts generating income — this is real cash out the door and belongs in your invested total, not treated as a separate, forgotten expense. If you're renovating to flip rather than hold, the House Flip Profit Calculator is the better tool for that specific math.

4. Gross rent, vacancy, and operating expenses

These feed into NOI the same way they would for a cap rate calculation. Use real, defensible numbers — the same caution about seller pro formas applies here as it does anywhere else in real estate underwriting.

5. Compare the result against your own target return

There's no universal "good" cash-on-cash number — it depends on your market, your risk tolerance, and what you could earn putting the same cash elsewhere. Decide your target before you run the numbers, not after, so the result doesn't quietly talk you into a deal that doesn't actually meet your bar.

The Math Behind Cash-on-Cash Return

The Cash-on-Cash Return Calculator measures your annual pre-tax cash flow as a percentage of the actual cash you put into a deal — down payment, closing costs, and upfront repairs — after accounting for your mortgage payment.

Total cash invested

Cash Invested = Down Payment + Closing Costs + Upfront Rehab

Annual cash flow

Cash Flow = NOI − Annual Debt Service (mortgage principal & interest)

Cash-on-cash return

CoC Return = (Annual Cash Flow ÷ Total Cash Invested) × 100

Unlike cap rate, this metric is levered — it reflects the amplifying effect (positive or negative) that financing has on your actual out-of-pocket return.

Worked examples

Example A — a moderate-leverage deal. A $500,000 property with 25% down ($125,000) plus 3% closing costs ($15,000) totals $140,000 in cash invested. With $48,000 gross rent, 5% vacancy, $14,500 in operating expenses, and a $375,000 loan at 6.75% over 30 years, NOI comes to $31,100 and annual debt service to about $29,187 — leaving just $1,913 in annual cash flow, for a cash-on-cash return of only 1.37%. On paper this deal has a healthy NOI, but the mortgage payment consumes nearly all of it.

Example B — the same deal with a smaller down payment. Drop the down payment to 15% ($75,000) instead of 25%, keeping closing costs the same. Cash invested falls to $90,000, but the larger $425,000 loan raises annual debt service to roughly $33,079 — which now exceeds NOI entirely. Cash flow turns negative, at about −$1,979/year, for a cash-on-cash return of −2.20%. Less cash tied up doesn't help if the added debt service outpaces it: this specific deal is worse with more leverage, not better, which is exactly why it's worth testing more than one down payment scenario before committing rather than assuming smaller down payments always improve returns.

Tips for Best Results

• 💡 Leverage can boost or hurt your return A larger loan lowers your cash invested but raises debt service — the net effect on CoC return depends on the spread between NOI yield and your mortgage rate.
• 💡 Pair with cap rate for the full picture The Cap Rate Calculator shows the property's unlevered strength; cash-on-cash shows what financing does to your specific return — look at both together.
• 💡 Test multiple down payment scenarios Because cash invested and debt service move in opposite directions as leverage changes, the down payment size that maximizes CoC return isn't always obvious without testing it directly.
• 💡 Set your target return before you shop Deciding your minimum acceptable cash-on-cash return in advance keeps a good-sounding pitch from talking you into a deal that doesn't actually clear your bar.

Common Mistakes to Avoid

• ⚠️ Common mistake: ignoring vacancy and capex A deal that only "works" at 0% vacancy and zero repairs isn't a safe deal — stress-test your numbers before committing.
• ⚠️ Common mistake: forgetting appreciation and paydown Cash-on-cash return excludes equity gains — total return is often meaningfully higher once appreciation and loan paydown are included.

Frequently Asked Questions