Cap Rate Calculator

Read as a yield, a 5.3% cap rate means the property generates 5.3% of its price in operating income each year before financing. Read as a price signal, it is the market's verdict on risk: buyers accept lower cap rates where they believe income is safe and likely to grow, and demand higher ones where they do not.

This is why low cap rates cluster in expensive, stable metropolitan markets and high cap rates appear in smaller or declining ones. A 4% cap rate in a supply-constrained coastal city and a 9% cap rate in a shrinking rural town are not a bad deal and a good deal — they are two different risk propositions priced accordingly.

Cap rate also works in reverse as a valuation tool. Divide a property's NOI by the prevailing market cap rate and you get an estimate of its value, which is how commercial property is routinely appraised. Raising NOI by $5,000 in a market trading at 6% adds roughly $83,000 of value — a far more direct lever than waiting for appreciation.

Marketing materials routinely present optimistic NOI figures, and the omissions are consistent enough to check for by name. An NOI that ignores vacancy, management and capital reserves can overstate the cap rate by two percentage points or more.

Vacancy and collection loss —

no property is occupied 100% of the time. Budget 5–10% of gross rent; more in transient markets.

Property management —

typically 8–10% of collected rent. Include it even if you self-manage — your time has value, and you may not always want the job.

Capital expenditure reserve —

roofs, boilers, water heaters and appliances all fail eventually. A reserve of 5–10% of rent smooths costs that arrive in lumps.

Maintenance and repairs —

routine upkeep, distinct from capital items. Older properties consume more.

Turnover costs —

cleaning, painting, repairs and letting fees between tenancies, plus the empty weeks themselves.

Never included —

mortgage principal and interest, depreciation, and your income tax. These belong to you, not to the property.

Because it ignores financing, cap rate says nothing about whether a deal produces cash for you. A property with a healthy 6% cap rate can still lose money monthly if the loan is large enough — the building performs while the investment does not.

It also ignores appreciation, tax treatment, principal paydown and your own time. Those are frequently the larger part of real estate returns, particularly the tax position, where depreciation can shelter income that a cap rate calculation shows as fully taxable.

And it breaks down entirely for single-family homes in owner-occupier markets, where prices are set by what residents will pay to live somewhere rather than by investment yield. A cap rate in that setting is arithmetically valid and practically meaningless.

Use cap rate to compare properties and to test a price against the market. Use cash-on-cash return, debt service coverage and a full cash-flow projection to decide whether to buy.

Because cap rate is NOI divided by value, and commercial value is derived from NOI, increasing operating income does double duty — it raises your yield and the asset's worth simultaneously.

The levers are unglamorous: bring below-market rents to market as leases renew, reduce vacancy through better tenant retention, appeal an over-assessment on property tax, re-tender insurance, and where the lease structure permits, pass utility costs to tenants.

This is the mechanism behind value-add investing. On a property in a 6% market, permanently cutting $3,000 of annual expense adds roughly $50,000 of value — considerably more reliable than hoping the market moves.