Cap Rate Calculator by Zip Code: Measure Property Performance

Cap rate is the most common metric for comparing income properties. Unlike rental yield, cap rate uses net operating income, making it a purer measure of property performance. This guide explains how to calculate and compare cap rates by zip code.

What Is Cap Rate?

Cap rate = Net Operating Income / Property Value

Net Operating Income (NOI) is all rental income minus operating expenses, excluding mortgage payments. Cap rate tells you the unleveraged return on a property.

Why Use Cap Rate?

Cap rate strips out financing differences. Two investors with different mortgages can compare the same property objectively using cap rate. It also standardizes comparison across markets.

Cap Rate by Zip Code: How to Find Data

1. Find average rents on rental listing sites filtered by zip code.
2. Estimate operating expenses at 30-40% of gross rent.
3. Find median property prices from recent sales.
4. Calculate NOI and divide by property value.

Cap Rate Benchmarks

Cap Rate	Assessment
Below 4%	Premium market, likely strong appreciation
4-6%	Balanced market
6-8%	Cash-flow focused market
Above 8%	High yield, possibly higher risk

Using Our Calculator

Our cap rate calculator simplifies the math. Enter annual NOI and property value. It outputs cap rate instantly. Use it to compare properties in different zip codes without getting lost in spreadsheets.

Example: A property generating $24,000 annual NOI, purchased for $400,000:

• Cap rate: 6.0%

If a comparable property in another zip code costs $350,000 with $21,000 NOI:

• Cap rate: 6.0%

Same cap rate, different scale. Choose based on your capital and risk preference.

Cap Rate vs Interest Rates

When interest rates rise, cap rates typically follow. A property bought at 5% cap rate with 3% financing was profitable. At 7% financing, the same property might lose money monthly. Always compare cap rate to your cost of capital.

Limitations

Cap rate ignores financing, taxes, and future appreciation. It assumes stable income. A property with deferred maintenance might show an inflated cap rate until repairs hit.

Use cap rate as one tool among several. Combine it with cash-on-cash return and total ROI for a complete picture. Our full suite of real estate calculators covers all three.