FreeByte

Rent affordability calculator

What rent your income supports.

Built and reviewed by Dovanic, Founder and editor, FreeByteLast reviewed: 2026-08-18
$
30%
$

Affordable rent

$1,390

40x annual rule

$1,740

With these inputs, affordable rent comes to $1,390. 40x annual rule works out to $1,740.

At 25% of income
$1,450
At 35% of income
$2,030

What moves the number · Affordable rent

Input−10%Now+10%
Gross monthly income$1,216$1,390$1,564
Share of income$1,216$1,390$1,564
Other debt payments$1,425$1,390$1,355

Solve for an input

Whatmakesequal

Compare scenarios

Save this set of inputs, change something, then save again to compare the outcomes side by side.

What rent your income supports.

A worked example

Starting figures

Gross monthly income
$5,800
Share of income
30%
Other debt payments
$350

What it returns

Affordable rent
$1,390
40x annual rule
$1,740
At 25% of income
$1,450
At 35% of income
$2,030

How to read the results

With the defaults above, affordable rent works out at $1,390.

Related calculators

Mortgage overpayment calculatorMortgage refinance calculatorLoan-to-value calculatorGift allowance calculatorDeposit interest calculatorMoving cost calculator