Cap Rate Calculator
Calculate cap rate with our free Cap rate Calculator. Compare rates, see projections, and make informed financial decisions.
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Where NOI = Net Operating Income (Annual Rental Income minus Annual Operating Expenses), and Property Price is the purchase price or current market value. The result is expressed as a percentage. A higher cap rate indicates a higher potential return on investment relative to the property's price.
Last reviewed: January 2026
Worked Examples
Example 1: Single-Family Rental Property
Example 2: Multi-Unit Apartment Building
Background & Theory
The Cap Rate Calculator applies the following established principles and formulas. Real estate investment analysis relies on a set of income-based metrics that translate property performance into comparable figures. Net Operating Income (NOI) is the annual income generated by a property after operating expenses but before debt service and taxes: NOI = Gross Rental Income - Vacancy Allowance - Operating Expenses. The capitalization rate (cap rate) expresses the relationship between NOI and property value: Cap Rate = NOI / Property Value. A higher cap rate signals greater income relative to price — and typically greater perceived risk or a weaker market — while lower cap rates characterize prime assets in supply-constrained markets. The Gross Rent Multiplier (GRM) offers a quicker, rougher valuation: GRM = Purchase Price / Annual Gross Rent. Investors use it to filter properties before conducting full underwriting. The Loan-to-Value (LTV) ratio, calculated as the mortgage balance divided by appraised value, determines a borrower's leverage and is a primary driver of both mortgage rate and lender approval. Conventional lenders in the US typically require LTV below 80 percent to avoid private mortgage insurance. Cash-on-cash return measures annual pre-tax cash flow as a percentage of total cash invested: CoC = Annual Cash Flow / Total Cash Invested. This metric is distinct from overall return because it isolates the performance of the equity component after servicing debt. Mortgage amortization creates a second wealth-building channel alongside appreciation: each monthly payment reduces the outstanding principal, transferring ownership from the lender to the borrower over the loan term. Standard amortization formula: M = P[r(1+r)^n] / [(1+r)^n - 1], where P is principal, r is the monthly rate, and n is the number of payments. In early years, most of each payment is interest; in later years, principal repayment accelerates. Appreciation and income return together constitute total return, and the optimal mix between them varies by market cycle, property type, and investor tax situation.
History
The history behind the Cap Rate Calculator traces back through the following developments. Formal systems of property rights trace their roots to ancient civilizations. Roman law developed sophisticated concepts of ownership, usufruct, and easements that influenced Western legal systems for two millennia. English common law codified property rights through statutes of mortmain and the Statute of Uses, laying groundwork for the modern mortgage — derived from the Old French meaning dead pledge, because the debt died either when repaid or when the creditor foreclosed. In the United States, the Homestead Act of 1862 granted 160 acres to settlers who improved the land, catalyzing westward expansion and creating a culture of owner-occupied housing. The federal government's role expanded dramatically in the twentieth century. The Great Depression devastated real estate values; the Federal Home Loan Bank System was created in 1932 and the Federal Housing Administration in 1934 to restore mortgage credit and standardize the long-term amortizing mortgage. The GI Bill of 1944 subsidized home loans for veterans, fueling the suburban boom of the 1950s and 1960s. Rising homeownership rates transformed real estate into the primary store of wealth for American middle-class households. The Savings and Loan crisis of the 1980s exposed the dangers of maturity mismatch — funding long-term mortgages with short-term deposits — combined with deregulation and fraud. Approximately 1,000 thrift institutions failed, costing taxpayers an estimated 160 billion dollars. The Resolution Trust Corporation was created in 1989 to manage and sell off failed institutions' assets. The 2008 global financial crisis stemmed from the originate-to-distribute model in which mortgage originators sold loans into securitization vehicles with little regard for borrower creditworthiness. The collapse of the subprime market triggered a cascade of writedowns at global financial institutions and led to the deepest recession since the 1930s. The Dodd-Frank Act of 2010 introduced qualified mortgage standards and risk-retention requirements. Post-pandemic monetary easing drove US home prices to record highs between 2020 and 2022, followed by a sharp slowdown as the Federal Reserve raised rates aggressively from 2022 onward.
Key Features
- Calculate monthly mortgage payments for fixed and adjustable rate loans and generate a full amortization table showing principal, interest, and remaining balance for every payment period.
- Evaluate investment property value using cap rate by dividing net operating income by purchase price, and compute gross rent multiplier to quickly compare acquisitions.
- Measure cash-on-cash return by dividing annual pre-tax cash flow by total cash invested, giving a direct profitability metric that accounts for financing structure.
- Determine the minimum monthly rent required to break even on operating expenses, mortgage, and vacancy allowance so you can assess market rent feasibility before purchasing.
- Estimate total closing costs including origination fees, title insurance, prepaid items, and transfer taxes as a percentage of purchase price for buyer and seller sides.
- Project property value and equity over a 1-30 year horizon using configurable annual appreciation rates, showing how principal paydown and price growth build net worth.
- Compare gross and net rental yield across multiple properties or markets by factoring in purchase price, annual rent, vacancy rate, and operating expense ratio.
- Track loan-to-value ratio over time and identify when you cross LTV thresholds that trigger PMI removal or unlock favorable refinancing conditions.
Frequently Asked Questions
Formula
Cap Rate = NOI / Property Price × 100
Where NOI = Net Operating Income (Annual Rental Income minus Annual Operating Expenses), and Property Price is the purchase price or current market value. The result is expressed as a percentage. A higher cap rate indicates a higher potential return on investment relative to the property's price.
Worked Examples
Example 1: Single-Family Rental Property
Problem: A property costs $250,000, generates $2,000/month in rent ($24,000/year), and has $6,000 in annual operating expenses. What is the cap rate?
Solution: NOI = $24,000 - $6,000 = $18,000\nCap Rate = $18,000 / $250,000 = 0.072 = 7.2%\nGross Yield = $24,000 / $250,000 = 9.6%
Result: Cap Rate: 7.2% | NOI: $18,000 | Gross Yield: 9.6%
Example 2: Multi-Unit Apartment Building
Problem: A 4-unit building costs $500,000, generates $4,800/month total rent ($57,600/year), and has $18,000 in annual expenses. What is the cap rate?
Solution: NOI = $57,600 - $18,000 = $39,600\nCap Rate = $39,600 / $500,000 = 0.0792 = 7.92%\nGross Yield = $57,600 / $500,000 = 11.52%
Result: Cap Rate: 7.92% | NOI: $39,600 | Gross Yield: 11.52%
Frequently Asked Questions
What is a cap rate in real estate?
The capitalization rate (cap rate) is the ratio of a property's Net Operating Income (NOI) to its purchase price or current market value. It measures the expected rate of return on a real estate investment, assuming you purchased the property with all cash (no mortgage). A higher cap rate generally indicates higher potential returns but often comes with higher risk. Cap rates typically range from 4-10% depending on property type, location, and market conditions.
What is a good cap rate for investment property?
A 'good' cap rate depends on the market and property type. In prime urban markets, cap rates of 4-6% are common. In suburban or secondary markets, 6-8% is typical. In rural or higher-risk areas, 8-12% may be expected. Class A properties in major cities might have cap rates as low as 3-4%, while value-add properties in emerging markets might exceed 10%. Always compare cap rates within the same market and property type for meaningful analysis.
How does cap rate differ from cash-on-cash return?
Cap rate measures the property's return regardless of financing — it assumes an all-cash purchase. Cash-on-cash return measures the actual return on the cash you invested, including the effects of leverage (mortgage). If you buy a $300,000 property with $60,000 down, your cash-on-cash return is based on that $60,000, not $300,000. With favorable financing, cash-on-cash return can be significantly higher than cap rate. In Cap Rate Calculator, cash-on-cash assumes all-cash purchase, making it equal to cap rate.
What expenses should I include in a cap rate calculation?
Include all recurring operating expenses: property taxes, property insurance, property management fees (typically 8-12% of rent), maintenance and repairs (budget 1-2% of property value annually), vacancy allowance (typically 5-10% of gross rent), utilities paid by the landlord, landscaping, HOA fees, and pest control. Do NOT include mortgage payments, capital improvements, depreciation, or income taxes. Underestimating expenses is the most common mistake in cap rate calculations.
Is my data stored or sent to a server?
No. All calculations run entirely in your browser using JavaScript. No data you enter is ever transmitted to any server or stored anywhere. Your inputs remain completely private.
How do I interpret the result?
Results are displayed with a label and unit to help you understand the output. Many calculators include a short explanation or classification below the result (for example, a BMI category or risk level). Refer to the worked examples section on this page for real-world context.
References
Reviewed by Sahil, Senior Finance & Tax Editor · Editorial policy