Cap Rate Calculator

Whether you’re analyzing a single-family rental, a strip mall, or a 20‑unit apartment building, the cap rate instantly shows you a property’s unleveraged income return. Use this free cap rate calculator to convert net operating income and value into a capitalization rate, derive a property’s worth from a target cap rate, or back‑into the NOI you need to hit your return goals.

This calculator is for educational purposes and does not constitute financial advice.

What Is the Capitalization Rate?

The capitalization rate, or cap rate, measures the annual return a property generates from its operations, before financing costs. Expressed as a percentage, it lets you compare different investment properties on an apples‑to‑apples basis, regardless of how you fund the purchase.

Investors rely on cap rate to decide whether a deal meets their return requirements. A higher cap rate signals a higher potential return–but also typically comes with greater risk. The metric is widely used in commercial and residential real estate to gauge market pricing and to estimate property value when NOI is known.

Cap Rate Formula and Calculation

The cap rate formula is straightforward:

Cap Rate = (Net Operating Income / Current Property Value) × 100%

Net Operating Income (NOI) is the annual income the property earns after all operating expenses are paid, but before debt service and income taxes. Operating expenses include:

• Property taxes
• Insurance
• Repairs and maintenance
• Property management fees
• Utilities (if paid by the owner)
• Vacancy and credit loss reserves

The formula deliberately excludes mortgage principal and interest, depreciation, and capital improvements. This keeps cap rate a pure measure of the property’s earnings power, independent of an owner’s financing structure.

How to Use the Cap Rate Calculator

The calculator works in three directions. Enter any two values, and it computes the third.

• Calculate cap rate: Provide the property’s current market value and its annual NOI. For example, a $500,000 property that brings in $40,000 in NOI yields an 8% cap rate.
• Estimate property value: If you know the NOI and the cap rate that similar properties trade for, the calculator estimates the property’s worth. This is the direct capitalization method used by appraisers.
• Find required NOI: Given a property’s asking price and your target cap rate, the tool tells you the net operating income the property must generate to meet that return.

Example Calculation

Imagine a duplex listed at $300,000. Gross annual rent totals $36,000. After paying property taxes, insurance, a 5% vacancy reserve, and routine maintenance, total operating expenses are $12,000.

• NOI = $36,000 – $12,000 = $24,000
• Cap Rate = ($24,000 / $300,000) × 100% = 8%

If similar duplexes in the area trade at a 7.5% cap rate, the same NOI suggests a possible market value of $320,000 ($24,000 / 0.075). The calculator above automates these comparisons so you can quickly screen listings.

What Is a Good Cap Rate?

There is no single “good” cap rate–it depends on market conditions, property type, location, and your risk tolerance. As a rough guide, Class A properties in top‑tier cities may show cap rates of 4–5%, while value‑add or Class C properties in secondary markets can reach 8–10% or higher.

In 2026, following a period of elevated interest rates, cap rates have expanded across many sectors. An apartment building that traded at a 4.5% cap rate in 2021 might now change hands closer to 5.5–6%. Always compare against recent sales of truly similar properties rather than chasing an arbitrary number.

Factors That Influence Cap Rate

• Location: Prime urban submarkets command lower cap rates because of high demand and perceived stability. Suburban or rural areas often trade at higher cap rates.
• Property type: Multifamily assets typically have lower cap rates than retail or office due to more stable income streams. Hospitality and single‑tenant net‑lease properties can have wider spreads.
• Tenant quality and lease duration: A long‑term lease to a national credit tenant lowers risk and cap rate. Short‑term or month‑to‑month leases increase uncertainty and push cap rates up.
• Interest rates: When borrowing costs rise, investors require higher returns, putting upward pressure on cap rates. The reverse occurs when rates fall.
• Economic growth: Strong job and population growth compress cap rates; stagnant or declining markets see cap rate expansion.

Cap Rate vs. Cash on Cash Return

Cap rate measures the return on the entire property value, assuming no debt. It ignores how the purchase is financed.

Cash‑on‑cash return, on the other hand, equals the annual pre‑tax cash flow divided by the total cash invested (down payment + closing costs). A property with an 8% cap rate might produce a 12% cash‑on‑cash return if financed with a mortgage, because the investor’s initial cash outlay is lower.

Because cap rate isolates the asset’s performance, it’s the go‑to metric for comparing deals across different markets. Cash‑on‑cash return helps you evaluate the specifics of your financing plan.

Limitations of Cap Rate

• Excludes debt and taxes: Cap rate doesn’t reflect mortgage payments, tax benefits, or depreciation. Two properties with identical cap rates can deliver vastly different after‑tax cash flows.
• Ignores future income changes: The calculation assumes a static NOI. It doesn’t account for rent growth, lease expirations, or large capital expenditures.
• A snapshot, not a forecast: Cap rate tells you today’s return based on current numbers. It doesn’t measure total return (income + appreciation) or the time value of money.
• Market‑driven distortions: In overheated markets, low cap rates may not signal low risk, just high prices. The metric must be paired with due diligence on rent rolls, expenses, and local trends.