Cap Rate Calculator

What cap rate is actually measuring

Capitalization rate, or cap rate, is an unlevered real-estate yield. It compares a property's annual net operating income with the price or value assigned to the property. That makes it useful when investors want to compare the income power of one asset with another before buyer-specific financing enters the picture.

The distinction matters because cap rate is not the same as levered cash flow. Mortgage principal and interest do not belong inside NOI. If one buyer uses more debt than another, the levered cash flow can change dramatically even though the property itself is producing the same operating income. Cap rate is meant to keep the focus on the building rather than on the buyer's financing structure.

A practical cap-rate worksheet therefore needs to show where NOI came from. If the entered NOI is too optimistic because vacancy, management, repairs, taxes, or insurance were understated, the cap rate can look attractive while the property economics are actually weaker than they first appear.

How this cap rate calculator builds the result

In direct NOI mode, the page takes annual NOI and property value and calculates the cap rate immediately. That route is useful when you already have a stabilized NOI figure from an appraisal, offering memorandum, lender worksheet, or your own operating statement. The same worksheet then compares the result with a target market cap rate and shows the value implied by that target.

In rent-and-expense mode, the calculator builds NOI from annual scheduled rent, recurring other income, vacancy and credit loss, and annual operating expenses. Vacancy reduces rent, other income is added back, and operating expenses are subtracted to produce NOI. The result sheet then shows cap rate, monthly NOI, gross yield before vacancy, expense ratio, and implied values at several common market cap rates.

That structure is more useful than a one-line ratio because it exposes whether the result is being driven by rent, by vacancy, by expense load, or simply by a high or low purchase price. It also makes it easier to compare the entered deal with a market-level cap-rate assumption instead of reading the headline percentage in isolation.

The calculator also works backward from the target cap rate to show the annual NOI needed at the entered price, the NOI surplus or shortfall, and the implied value gap between the entered property value and the value supported by the target cap rate. Those reverse outputs are useful when the real question is not only "what is the cap rate?" but "how much income or price movement would make this deal match the market?"

Using cap rate with financing and market context

Cap rate still excludes debt service, but investors often compare the unlevered property yield with a current financing reference rate to spot negative-leverage risk. If the cap rate is materially below the borrowing rate, debt can pressure cash-on-cash return even when the property has positive NOI. If the cap rate clears the financing reference rate by a comfortable margin, leverage may be less of a drag, although loan terms, amortization, reserves, and closing costs still need separate analysis.

This page keeps that comparison in the result area without mixing mortgage payments into NOI. The financing reference spread is a context signal, not a new cap-rate formula. It helps you decide whether to move to a deeper cash-flow model, negotiate price, revisit rent assumptions, or compare the same NOI against a different target market cap rate.

Market context matters just as much. A reasonable cap rate depends on property type, location, lease quality, tenant risk, growth expectations, local regulation, and the interest-rate environment. Use the quick presets as starting points, then replace them with property-specific rent rolls, operating statements, vacancy assumptions, and comparable-sale evidence before treating the result as decision-ready.

Worked example: 54,000 of annual rent on a 500,000 property

Suppose a rental property is priced at 500,000, produces 54,000 of scheduled annual rent, 1,800 of other annual income, assumes 5% vacancy, and carries 18,000 of annual operating expenses. Vacancy reduces scheduled rent by 2,700, leaving 51,300 of effective rental income. Adding the 1,800 of other income produces 53,100 of effective gross income.

Subtracting 18,000 of operating expenses leaves NOI of 35,100. Dividing 35,100 by the 500,000 property value gives a cap rate of about 7.02%. If the local market is trading closer to a 6.5% cap rate, the same NOI would imply a value of roughly 540,000 rather than 500,000. That comparison does not prove the property is mispriced, but it tells you the entered price is lower than the value implied by that target market yield.

At that same 6.5% target cap rate, the 500,000 price would require about 32,500 of NOI. The example therefore has an NOI cushion of about 2,600 above the target threshold. If the financing reference rate were 7.25%, however, the unlevered cap rate would sit slightly below the borrowing-rate reference, so the investor should not assume leverage will improve the cash return without a separate debt-service model.

The worked example also shows why gross yield and cap rate are not interchangeable. Gross yield uses top-line rent and ignores vacancy and operating expenses. Cap rate uses NOI, which is why it is usually the more decision-useful number when the goal is to compare real estate on an operating basis.

What cap rate does not answer on its own

Cap rate is a fast screening ratio, not a complete investment decision. It does not tell you how much debt service the property can support, whether major capital expenditures are approaching, how lease rollover risk is distributed, or whether future rent growth or rent decline is likely. Two properties can show the same cap rate while carrying very different structural, tenant, or financing risks.

Cap rate is also market-sensitive. A 5% cap rate can be aggressive in one market and conservative in another depending on location, asset quality, tenant quality, lease duration, interest-rate backdrop, and growth expectations. Use this page to frame the operating yield and valuation relationship, then pressure-test the assumptions with full due diligence before relying on the result for a purchase, refinance, or underwriting decision.

The calculator's target cap rate, implied value, NOI gap, price-to-NOI multiple, and financing-reference spread are screening aids. They do not replace local comparable sales, broker opinions of value, appraisals, lender underwriting, environmental review, lease review, insurance quotes, tax reassessment checks, or a reserve plan for repairs and capital projects.