Cash-on-Cash Return Calculator Formula

Understand the math behind the cash-on-cash return calculator. Each variable explained with a worked example.

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Formulas Used

Cash-on-Cash Return

cash_on_cash = (annual_pre_tax_cash_flow / total_cash_invested) * 100

Monthly Cash Flow

monthly_cash_flow = annual_pre_tax_cash_flow / 12

Simple Payback Period

payback_years = annual_pre_tax_cash_flow > 0 ? total_cash_invested / annual_pre_tax_cash_flow : 0

Variables

Variable	Description	Default
`annual_pre_tax_cash_flow`	Annual Pre-Tax Cash Flow(USD)	7200
`total_cash_invested`	Total Cash Invested(USD)	75000

How It Works

Cash-on-Cash Return

Cash-on-cash (CoC) return measures the yield on the actual cash you put into a deal, reflecting the impact of leverage.

Formula

CoC Return = Annual Pre-Tax Cash Flow / Total Cash Invested x 100

Cash Invested Includes

Down payment

Closing costs

Initial repairs and improvements

Any cash reserves required by the lender

Worked Example

An investor puts $75,000 total cash into a deal and receives $7,200 annual pre-tax cash flow.

annual_pre_tax_cash_flow = 7200total_cash_invested = 75000

01Cash-on-cash return: $7,200 / $75,000 x 100 = 9.60%
02Monthly cash flow: $7,200 / 12 = $600
03Simple payback period: $75,000 / $7,200 = 10.4 years

When to Use This Formula

Evaluating how efficiently your actual cash invested in a rental property is generating annual returns, accounting for leverage from a mortgage.
Comparing two investment properties where different down payments and loan terms make it impossible to compare using price or NOI alone.
Deciding between paying all cash versus financing a property — cash-on-cash return shows how leverage amplifies (or diminishes) your return on the cash you put in.
Presenting investment performance to partners in a straightforward metric that answers "what annual percentage return am I getting on the money I actually put in?"
Screening potential deals against a minimum return threshold — many investors require at least 8-10% cash-on-cash before pursuing further due diligence.

Common Mistakes to Avoid

Using gross rental income instead of annual pre-tax cash flow — cash-on-cash return requires net cash flow after all operating expenses AND debt service (mortgage payments), not just rent collected.
Forgetting to include all cash invested in the denominator — total cash invested includes the down payment, closing costs, renovation costs, and any other out-of-pocket expenses, not just the down payment.
Confusing cash-on-cash return with cap rate — cap rate ignores financing and measures the property's return, while cash-on-cash measures the return on your actual cash outlay. A property with a 6% cap rate can have a 12% cash-on-cash return with favorable financing.
Ignoring that cash-on-cash return changes over time — as rents increase and the mortgage balance decreases, cash flow improves, so the year-one figure does not represent the long-term return.
Not accounting for vacancy and maintenance reserves in cash flow — using 100% occupancy and zero maintenance reserves inflates the annual cash flow and makes the return look unrealistically high.

Frequently Asked Questions

What is a good cash-on-cash return?

Many investors target 8-12% cash-on-cash return. Above 12% is excellent. Below 5% may not justify the effort and risk of real estate versus passive investments like index funds.

How is CoC different from cap rate?

Cap rate ignores financing entirely and measures property-level return. CoC accounts for your actual cash invested and debt service, showing the leveraged return on your money.

Does CoC include appreciation or tax benefits?

No. CoC only measures cash flow return. Total return also includes appreciation, principal paydown, and tax benefits like depreciation. CoC is a conservative, cash-only metric.

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