Rent Affordability Calculator
Check what rent you can comfortably afford from your income and existing debts.
Last updated · View algorithm, constants and default inputs (JSON)
About this calculator
Use the same currency throughout. This budget scenario subtracts estimated utilities from your target rent limit and from 45% of gross monthly income minus monthly debt payments. The 30% benchmark is often used to describe housing-cost burden in U.S. statistics, but it is not a personal affordability rule. The 40× result is an optional comparison, not a universal landlord requirement.
Worked example
calculated with the default values below
Monthly gross income 6,000 $ · Other monthly income 0 $ · Monthly debt payments 400 $ · Target rent-to-income ratio 30 % · Utilities per month 150 $ Total monthly income 6,000 $ · Maximum rent after utilities at your ratio 1,650 $ · Maximum rent after debts and utilities 2,150 $ · Recommended rent ceiling 1,650 $ · Annual income at 40× rent (illustration) 66,000 $
General background references
Disclaimer
These calculators give estimates for general information only. They are not financial, tax or investment advice and do not take your personal circumstances into account. Before borrowing, investing or filing, confirm the numbers with a qualified adviser in your jurisdiction.
Implementation source
This record describes the implementation used by this page. It is not independent validation. External references, when available, support only the stated formula or definition; estimates and custom rules retain their own assumptions.
Formula and variables
Rₜ = max(0, (I+O)×p÷100 − U); R_d = max(0, (I+O)×0.45 − D − U); R = min(Rₜ, R_d); L = 40×R
- I
- Monthly gross income
- O
- Other monthly income
- D
- Existing monthly debt payments
- p
- Target rent-to-income ratio (%)
- U
- Estimated utilities per month
- Rₜ
- Target-ratio rent limit after utilities
- R_d
- R_d is the 45% gross-income ceiling after debts and utilities.
- R
- Recommended rent ceiling
- L
- Annual income at 40× monthly rent (illustration)
Utilities are deducted from both rent limits. The 30% target and 45% gross-income cap are planning assumptions, not universal affordability rules. The 40× output is an optional screening comparison; landlord requirements vary. Move-in funds are displayed as entered.
Frequently asked questions
How does the calculator estimate a rent ceiling?
It subtracts estimated utilities from both limits: your chosen share of gross income and a sample cap equal to 45% of gross monthly income minus monthly debt payments. It recommends the lower nonnegative rent amount. These are budgeting assumptions, not a universal affordability rule or a landlord decision. The 40× output is an optional screening comparison; local requirements vary.