Cap Rate Explained: Your Questions Answered, Plus a 5-Round Challenge

Last reviewed: October 2026 · By the MortgageCompass Editorial Team · How we research

Cap rate is one of the first numbers property investors learn, and one of the most misused. Instead of a lecture, this guide answers the questions new investors actually ask, in the order they usually ask them. Halfway through, you can test yourself with a five-round challenge.

The capitalization rate is the yearly net income a property produces, before any mortgage payments, as a percentage of what the property costs. It tells you what return you would earn if you bought it in cash, which makes it a quick way to compare properties of different prices on equal terms.

Divide the net operating income (NOI) by the purchase price or current value, then multiply by 100.

Here is a worked example for a $300,000 duplex renting for $2,500 a month in total:

• Gross rent for the year: $30,000
• Minus 5% for empty months and unpaid rent: $28,500 collected
• Minus operating costs: property tax $3,600, insurance $1,800, maintenance $2,400 and management at 8% of collected rent, $2,280. Total: $10,080
• Net operating income: $18,420
• Cap rate: $18,420 ÷ $300,000 = 6.14%

Anything you must pay to keep the property rented and running: property taxes, landlord insurance, repairs and maintenance, property management, HOA or condo fees, utilities you pay as the landlord, and an allowance for vacancies. Set aside money for big items such as roofs and boilers too, even if nothing breaks this year. What does not count: mortgage principal and interest, income tax, depreciation and one-off renovation costs, which belong in the price instead.

Often it is, but cap rate describes the property, not your financing. Two buyers of the same house, one paying cash and one borrowing 80%, own an asset with the same cap rate. Leaving the loan out is what makes cap rates comparable. To measure the return on your own money after the mortgage, use cash-on-cash return instead: yearly cash flow after loan payments divided by the cash you put in.

There is no single answer, because cap rate reflects both return and risk. CBRE’s H1 2026 Cap Rate Survey put the average across all commercial property types at roughly 6.6%, with prime apartments in New York City at about 5% to 5.5% and some suburban offices above 10%. Lower cap rates usually mean buyers expect stability or price growth; higher ones usually mean more risk, older buildings or weaker locations.

For a buyer using a mortgage, the most useful benchmark is your borrowing rate. Freddie Mac’s 30-year average was 7.40% on October 15, 2026, and loans on investment properties usually cost more than that. When a property’s cap rate is below your mortgage rate, borrowing lowers your return instead of raising it, which investors call negative leverage. Check today’s mortgage rates before you run the numbers.

Back to the duplex: with 25% down and a $225,000 loan at 7.9% over 30 years, the mortgage costs about $19,624 a year. That is more than the $18,420 net operating income, so the property has negative cash flow of around $1,200 a year before tax, even with a respectable 6.14% cap rate. The cap rate is unchanged; the financing is what makes the deal negative.

Yes. Each round below has three properties and one trap that catches real buyers. Pick the one with the highest cap rate.

No. A 10% cap rate on a building in a declining area with frequent vacancies can be a worse investment than a 5.5% cap rate on a well-kept property in a growing city. The higher number is partly compensation for risk. Ask why the cap rate is high before treating it as a bargain.

Yes, by turning the formula around: price = net operating income ÷ target cap rate. If you want at least 7% on the duplex above, the most you would pay is $18,420 ÷ 0.07, or about $263,000, rather than the $300,000 asking price. Many investors start negotiations this way.

Gross rental yield divides the yearly rent by the price, without taking off any costs, so it always looks higher. Net yield takes off costs and is close to cap rate; in the UK and Australia, “net yield” is the term most investors use for the same idea. Our guide on how to calculate rental yield covers both.

The formula is the same, but income and costs are far less predictable. Use realistic occupancy, include cleaning, platform fees, furnishing and utilities, and check local rules before you buy. Our short-term rental profitability calculator builds those costs in.

• It is a one-year snapshot. It says nothing about rent growth, price growth or future repairs.
• It is only as good as your inputs. A seller’s cap rate often uses best-case rent and leaves out vacancy or management.
• It ignores financing, tax and the cost of your time.
• It is hard to compare across very different markets or property types.

Use cap rate to shortlist properties quickly, then look at cash flow after the mortgage, the condition of the building and the local rental market before you make an offer.

Rebuild every cap rate yourself from the rent roll, the tax bill and an insurance quote, and always add a vacancy allowance. If your number is well below the one in the listing, you have just found your negotiating point.

Sources

• CRE Daily: CBRE H1 2026 Cap Rate Survey
• Freddie Mac: Primary Mortgage Market Survey
• IRS Publication 527: Residential Rental Property

This guide is for informational purposes only and is not investment, tax or financial advice. Property values and rents can fall as well as rise. Examples use illustrative figures; do your own research or speak to a qualified adviser before buying an investment property.