Cash-on-cash return is the metric most working landlords actually watch year to year, because unlike cap rate or total ROI, it answers one specific question: for every dollar of my own cash I put into this deal, how much cash am I getting back this year? Here’s the formula, a full worked example, and where it breaks down.
The Formula
Cash-on-cash return = Annual Pre-Tax Cash Flow ÷ Total Cash Invested, expressed as a percentage.
- Annual pre-tax cash flow is the money left over after collecting rent and paying every operating expense and the mortgage payment (principal + interest) — but before accounting for income taxes.
- Total cash invested is every dollar of your own money that went into acquiring the deal: down payment, closing costs, and any immediate repair or renovation budget. It does not include the financed portion of the purchase price.
Worked Example
Take a $300,000 single-family rental purchased with 20% down:
- Down payment (20%): around $60,000
- Closing costs: around $6,000
- Initial repair budget: around $4,000
- Total cash invested: around $70,000
Operating year one:
- Gross rent: around $2,400/month, or $28,800/year
- Vacancy + operating expenses (taxes, insurance, maintenance, management — roughly 45% of gross rent is a common all-in estimate): around -$12,960/year
- NOI: around $15,840/year
- Mortgage payment (80% financed, ~7% rate, 30-year): around -$13,440/year
- Annual pre-tax cash flow: around $2,400/year
Cash-on-cash return = $2,400 ÷ $70,000 = around 3.4%.
That number often surprises new investors expecting double digits — and it’s the honest reality of a lot of leveraged rental deals bought at market rates today. A 3-4% cash-on-cash return isn’t a bad deal if the property is also appreciating and the tenant is paying down your loan balance, but it’s a thin cushion if a big repair shows up.
Why Cash-on-Cash Isn’t the Whole Picture
Cash-on-cash only measures the cash flow slice of your return. It deliberately ignores two other components that matter a great deal over a multi-year hold: principal paydown (the portion of your mortgage payment reducing loan balance, which is real equity you’re building) and appreciation (property value growth, which is unrealized until sale or refinance). In the example above, if roughly $4,200 of that year’s mortgage payment went to principal, your “total return” including paydown is closer to 9.4% even though cash-on-cash alone shows 3.4%. Investors who only look at cash-on-cash sometimes pass on genuinely good long-term deals that simply carry more debt-service weight in year one.
Cash-on-Cash vs. Cap Rate vs. IRR
| Metric | What It Measures | Accounts for Financing? | Best Use |
|---|---|---|---|
| Cap Rate | NOI ÷ Purchase Price | No | Comparing properties as if bought all-cash |
| Cash-on-Cash | Annual cash flow ÷ cash invested | Yes | Judging your actual leveraged cash return this year |
| IRR | Annualized return over the full hold, including sale proceeds | Yes | Comparing the full multi-year investment, not just year one |
What Counts as a “Good” Cash-on-Cash Return?
Benchmarks vary heavily by market and risk tolerance, but a widely used rough guide among buy-and-hold investors is: below 4% is thin and leans on appreciation to make the deal work; 6-8% is a solid, common target for stabilized long-term rentals; 10%+ usually means either a lower-priced market, a value-add angle (under-market rents you’re about to raise), or a more cash-heavy purchase with a smaller mortgage payment eating into the return.
Common Calculation Mistakes
The most frequent error is leaving out closing costs and the initial repair budget from “total cash invested” — using only the down payment inflates the return. The second most common mistake is using the seller’s pro forma rent instead of a verified trailing rent roll or your own comparable-rent research, which overstates the annual cash flow input. Finally, some investors calculate cash-on-cash using gross rent instead of NOI after all operating expenses, which produces a number with no real relationship to the cash that actually lands in your account.
Frequently Asked Questions
Does cash-on-cash return change every year?
Yes. As rent rises, your mortgage payment (on a fixed-rate loan) stays flat, so cash-on-cash return typically improves year over year on a well-performing rental, even without refinancing.
Should I use cash-on-cash return to compare an all-cash purchase to a financed one?
Not directly — an all-cash purchase will always show a much lower cash-on-cash percentage because the “cash invested” figure is so much larger, even though the actual dollar cash flow may be similar or higher. Cap rate is the better apples-to-apples metric for comparing deals regardless of financing structure.
Is a spreadsheet or a calculator app better for this?
Either works, but a simple spreadsheet you build yourself forces you to see every line item (vacancy, capex reserve, management fee) rather than trusting a black-box calculator’s default assumptions, which is worth the extra ten minutes when you’re underwriting a deal you might actually buy.
Verdict
Cash-on-cash return is the right metric for answering “what’s my actual leveraged cash return this year,” but it should never be the only number you look at before buying — pair it with principal paydown and a realistic appreciation assumption to see the full return picture, and always build the calculation from a verified rent roll and a real (not optimistic) expense ratio.
