Rent-to-Income Calculator
The 3× rule, worked in both directions: enter an income to see the rent it supports, or enter your asking rent to see the income an application needs to show.
The 3× rule is a convention, not a law. Some states and cities restrict minimum-income requirements, especially for tenants with housing subsidies, so check local rules before applying a hard cutoff.
General information for landlords, not legal advice. Statutes change and cities add their own rules; confirm current law where the property sits, or ask a local landlord-tenant attorney.
What the rent-to-income ratio measures
The rent-to-income ratio compares what a tenant would pay in rent against what they earn. Landlords use it as an affordability screen: if the rent would swallow too much of the gross income, the risk of missed payments climbs, no matter how good the application looks otherwise.
The convention runs in two directions, and the calculator above handles both. Start from an income to find the highest rent it comfortably supports, or start from your asking rent to find the income an application needs to show.
How the 3× rent rule works
The most common version asks for gross monthly income of at least three times the rent. Gross means before taxes and deductions, straight off the pay stub or offer letter. Run the multiplication monthly or annually; the answer is the same either way.
Three is a rounded cousin of the classic guideline that housing should stay under 30% of gross income. Keeping rent to a third of earnings leaves room for taxes, a car, groceries, and the occasional bad month. Tighter markets sometimes run at 2.5×, while some owners of higher-end units ask for 3.5×.
Income needed = monthly rent × 3 × 12 months
Max affordable rent = annual gross income ÷ 12 ÷ 3
Example: $2,000.00 rent × 3 = $6,000.00/mo, or $72,000.00 a year
A worked example: two applications, one unit
Riverside Apartments lists a one-bedroom at $1,450.00 a month and screens at 3×. Two applications come in the same week.
The first applicant earns $28.00 an hour, full time. The second earns $21.00 an hour, which is solid income that still lands short of the line at this rent. Short is not the end of the road: a co-signer, or a roommate whose income combines on a joint application, changes the arithmetic.
- Applicant 1: $28.00 × 2,080 hrs = $58,240.00 a year, $4,853.33 a month. Max rent at 3× is $1,617.78. Qualifies.
- Applicant 2: $21.00 × 2,080 hrs = $43,680.00 a year, $3,640.00 a month. Max rent at 3× is $1,213.33. Falls short.
- Applicant 2 plus a roommate earning $30,000.00: $73,680.00 combined, $6,140.00 a month, max rent $2,046.67. Qualifies together.
Using the ratio consistently and fairly
An income ratio is only defensible when it is applied the same way to every application. Write the multiplier into your criteria, use gross income every time, and count every lawful source: wages, self-employment, benefits, support payments, and housing assistance where the law says so.
Several states and cities have source-of-income laws that require counting vouchers, and some require applying the ratio only to the portion of rent the tenant actually pays. A 3× demand on the full rent can be unlawful for a voucher holder whose own share is a few hundred dollars, so check the rules where the property sits before setting a hard cutoff.
One more habit worth keeping: save the math. Note the income you verified, the multiplier you applied, and the result, in the tenant file. If a decision is ever questioned, the arithmetic is your best witness.
Common questions
What is the 3x rent rule?
The 3x rent rule says a tenant should earn at least three times the monthly rent in gross income. For a $2,000.00 apartment, that means $6,000.00 a month or $72,000.00 a year before taxes. It is a widely used shorthand for the guideline that housing should take up no more than about a third of gross income.
Is the ratio based on gross or net income?
Gross income, meaning pay before taxes and deductions. Pay stubs, offer letters, and tax returns all state gross figures, which keeps verification simple and consistent across applicants. Using net income would make the same rule stricter and harder to verify.
How do landlords verify income?
The usual documents are recent pay stubs, an offer letter for a new job, W-2s or tax returns for a longer view, and bank statements or 1099s for self-employed applicants. Ask for the same documents from every applicant and keep copies with the application.
How does the rule work for roommates or joint applications?
Combine the gross incomes of everyone signing the lease and compare the total against the rent. Two roommates earning $40,000.00 each have $80,000.00 of combined income, which supports about $2,222.22 of rent under a 3x rule.
Can I require more than 3x the rent?
You can set a stricter multiplier such as 3.5x if you apply it uniformly to every application, though it will shrink your applicant pool. Check local law first: some jurisdictions restrict minimum-income requirements, and source-of-income rules can require a different calculation for tenants with housing assistance.
What ratio should a renter aim for?
From the tenant side, the same math is a budget check: rent at or under a third of gross income leaves room for everything else. Someone earning $60,000.00 a year has $5,000.00 a month gross, which puts a comfortable ceiling near $1,666.67.
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