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Rental Property Calculator

Analyze cash flow, cap rate and cash-on-cash return for a rental property.

Reviewed by the KakouCalc editorial team · Updated July 2026

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Monthly Cash Flow
$58.04
Cap Rate
6.30%
Cash-on-Cash Return
1.16%
NOI (Annual)
$18,900.00
Mortgage Payment
$1,516.96
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How to use the Rental Property Calculator

The Rental Property Calculator is free and runs entirely in your browser — no sign-up, and nothing you enter leaves your device. It opens pre-filled with a realistic example, so you can see how it works before replacing any figure with your own; the results update as you type. Press Calculate to refresh the result panel, or Reset to return to the example.

The inputs it asks for:

  • Purchase Price — a dollar amount.
  • Down Payment — a dollar amount.
  • Mortgage Rate — a percentage (enter 6 for 6%).
  • Mortgage Term (yrs) — a number.
  • Monthly Rent Income — a dollar amount.
  • Monthly Operating Expenses — a dollar amount.
  • Vacancy Rate — a percentage (enter 6 for 6%).

Worked example

Using the example values — Purchase Price $300,000.00, Down Payment $60,000.00, Mortgage Rate 6.5%, Mortgage Term (yrs) 30, Monthly Rent Income $2,500.00, Monthly Operating Expenses $800.00, and 1 more — the Rental Property Calculator returns a Monthly Cash Flow of $58.04. It also reports Cap Rate (6.30%), Cash-on-Cash Return (1.16%), NOI (Annual) ($18,900.00).

Prefer your own numbers? Change any field above and this recomputes instantly.

Educational information, not financial advice. See our methodology for how these tools are built and checked.