Rent
Rent-to-income ratio
An applicant's rent as a percentage of their gross income — a screening affordability benchmark.
Glossary
Rent
Primary references on this page:
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HUD: Housing discrimination under the Fair Housing ActRent-to-income ratio compares the rent to an applicant’s income to gauge affordability. A widely used benchmark is that rent should be no more than about 30% of gross monthly income — equivalently, that income should be around 3× the rent — though every landlord sets their own threshold.
It’s one input in screening, not the whole picture: savings, other debts, and rental history matter too. Whatever benchmark you choose, apply it consistently to every applicant and write it down — both because that’s fairer and because inconsistent standards can create fair-housing exposure.
Calculate a ratio without turning it into an approval verdict
If monthly rent is $1,800 and verified gross monthly income under a written policy is $6,000, the ratio is 30%. Equivalently, income is 3.33 times rent. That arithmetic does not decide whether the household can or should rent the unit: it omits utilities, debt, savings, income stability, household obligations, and any alternative evidence that current law or policy requires a housing provider to consider.
The often-cited 30% figure comes from housing-cost-burden policy and research contexts; it is not a universal private-landlord approval rule. Gross rent in affordability research may include utilities, while an applicant screen may use contract rent. Label the numerator, income definition, period, and verification rule so different measures are not presented as the same ratio.
A defensible landlord use
Use the ratio as one consistently administered affordability input, with a dated policy, source record, calculation, reviewer, and reason code. If a result triggers more review, the next step should already be defined rather than improvised for an individual applicant.
Do not use protected characteristics, proxies for protected characteristics, or selectively requested documents to change the result. An adverse decision may also trigger notice or record duties depending on the information used and the jurisdiction. Qualified review is appropriate before deploying a screening standard.
This is general educational information, not legal or tax advice. Rules vary by state and locality and change over time — check your local law and confirm specifics with a qualified professional.