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Home Equity & Real Estate

Cap Rate vs. Cash-on-Cash Return: How to Analyze a Rental Property

Cap rate measures the property; cash-on-cash measures your deal. Learn both, how financing changes them, and the expense assumptions that make or break a rental.

Updated 4 min read By the Calcvera editorial team
Run your own numbers Rental Property Calculator — Cash flow, cap rate, cash-on-cash return and DSCR for a rental property.

Two numbers dominate rental property analysis: the capitalization rate (cap rate) and the cash-on-cash return. They sound similar, but they answer different questions:

  • Cap rate: how good is this property?
  • Cash-on-cash return: how good is this deal, with my financing?

Using the right one at the right time, with realistic expenses, is how investors avoid properties that look great on paper and lose money in practice.

Start with net operating income

Both metrics begin with net operating income (NOI): the property’s income after operating expenses, but before mortgage payments.

NOI = rent + other income − vacancy − operating expenses

Operating expenses include:

  • property taxes;
  • insurance;
  • HOA dues;
  • utilities you pay;
  • repairs and maintenance;
  • property management;
  • a reserve for capital expenditures such as roofs, HVAC and appliances.

Mortgage payments, depreciation and your income taxes are not operating expenses.

Cap rate: the property’s yield

Cap rate = annual NOI ÷ purchase price (or value)

Cap rate is what the property would return if you bought it with cash. Because it ignores financing, it’s ideal for comparing properties and markets with each other.

  • High-cost, high-demand areas often trade at cap rates of about 4%–6%.
  • Lower-cost markets often trade at 7%–10% or more.
  • Higher cap rates usually come with more risk, more management work or slower appreciation.

Cash-on-cash: your deal’s yield

Cash-on-cash return = annual cash flow ÷ total cash invested

Here, cash flow is what’s left after the mortgage payment (NOI minus debt service). Cash invested includes your down payment, closing costs and any upfront repairs. Cash-on-cash tells you what your own money is earning, and it changes with how you finance the property.

Worked example

A $220,000 home rents for $2,200 a month.

Operating figures

  • Vacancy: 5%.
  • Property taxes: $2,800 a year.
  • Insurance: $1,500 a year.
  • Maintenance, management and capital expenditure reserves: 21% of rent.

Financing

  • Down payment: 25%.
  • Closing costs: $5,500.
  • Loan: 7% over 30 years.

Results

  • NOI: about $15,236 a year, so the cap rate is about 6.9%.
  • Mortgage payment: $1,097.75 a month, leaving cash flow of about $172 a month ($2,063 a year).
  • Cash invested: $60,500 in total ($55,000 down plus $5,500 closing costs), so the cash-on-cash return is about 3.4%.

Test your own deal with the rental property calculator.

How financing changes the picture

Borrowing magnifies returns in both directions. The dividing line is the loan’s mortgage constant: annual principal and interest divided by the loan amount. For a 7% 30-year loan, it is about 8%.

  • Positive leverage. When the cap rate is above the mortgage constant, each borrowed dollar earns more than it costs, so cash-on-cash rises above the cap rate.
  • Negative leverage. When the cap rate is below the mortgage constant, borrowing lowers your return. The example above, with a 6.9% cap rate against an 8% constant, has mild negative leverage. It still cash flows, but only because of the 25% down payment.

With mortgage rates in the 6%–7% range, negative leverage is common. Investors respond by:

  • putting more money down;
  • buying in higher-cap-rate markets;
  • adding value through renovation (see the BRRRR calculator);
  • accepting low cash flow in exchange for expected appreciation and loan paydown.

Expense assumptions make or break the numbers

The most common analysis mistake is leaving out expenses that don’t show up every month. Typical planning ranges:

  • Vacancy: 5%–8% of rent.
  • Repairs and maintenance: 5%–10%.
  • Capital expenditures reserve: 5%–10%.
  • Property management: 8%–10% of collected rent, even if you manage it yourself, because your time is worth something.

Operating expenses often total 35%–50% of rent before the mortgage, which is where the “50% rule” comes from. If a seller’s numbers show 20%, they are probably leaving something out.

Other metrics worth checking

  • DSCR (debt service coverage ratio): rent ÷ (principal, interest, taxes, insurance and HOA). It shows how lenders judge whether the rent covers the loan; see the DSCR loan calculator.
  • Break-even occupancy: the occupancy rate at which income covers all expenses and the mortgage. Lower is safer.
  • The 1% rule: monthly rent as a percentage of price. It’s a fast screen for whether to look closer, not a decision rule.
  • Total return: cash flow plus principal paydown plus appreciation plus tax benefits. Cash flow is the most reliable part; the others are real but less certain.

A quick analysis checklist

  1. Verify the rent with comparable listings, not the seller’s projection.
  2. Get real quotes for insurance, and check the tax bill after the sale, since reassessment can raise it.
  3. Budget vacancy, maintenance, capital expenditures and management, even if the seller didn’t.
  4. Calculate NOI and the cap rate, then compare them with similar properties.
  5. Add your financing, then check cash flow, cash-on-cash return and DSCR.
  6. Stress-test: 10% lower rent, a rate 1 point higher, a major repair in year one.
  7. Decide whether the deal still works under the stressed assumptions.

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Key terms

About this guide. Written by the Calcvera editorial team, first published September 25, 2026 and last reviewed September 25, 2026. It is general education, not financial, tax or legal advice. See our editorial policy or report an error.