Formula guide

Rent vs Buy Calculator formula

This tool uses a standard estimation formula that updates instantly as you change the inputs.

How the input values are used

Monthly rent (USD)

The numeric value in USD is used in the calculation; keep units consistent.

Home price (USD)

The numeric value in USD is used in the calculation; keep units consistent.

Down payment (USD)

The numeric value in USD is used in the calculation; keep units consistent.

Mortgage rate (%)

The numeric value in % is used in the calculation; keep units consistent.

Comparison horizon (years)

The numeric value in years is used in the calculation; keep units consistent.

How to interpret the result

  • The result uses Monthly rent (USD) and Home price (USD). Change one variable at a time to compare its effect on the outcome.
  • Check whether relevant fees, taxes, and timing assumptions are included before using the estimate.
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