Rent Budget Calculator

"Spend 30% of your income on rent" is the most repeated line in personal finance, and almost nobody says where it comes from or what happens past it. This rent budget calculator uses the actual federal standard: the 20-50% income-share bands the U.S. government and Census Bureau use to sort housing into affordable, cost-burdened, and severely cost-burdened.^[1] The 30% line traces to the Brooke Amendment of 1969 (a 25% cap on public-housing rent), raised to 30% by housing laws in 1981 and 1983.^[1]

Federal housing policy still defines "affordable" as costing no more than 30% of income. Households paying more are "cost burdened," and those paying more than half their income are "severely cost burdened." In 2023, 49.5% of U.S. renter households were cost burdened, and 26.5% severely so.^[1]

The four tiers this calculator shows

Enter your income in any form, salary, monthly, or hourly with your usual hours, and the calculator converts it to gross monthly and multiplies by each percentage.

What it leaves out

This is base rent only, no utilities, renters insurance, parking, or moving costs, and it doesn't adjust for where you live: 30% of your income is the same dollar figure in a cheap town and an expensive coast, even though it rents very different apartments. Read it as an income ceiling, then hold it against real listings.

Source: Congressional Research Service, "Housing Cost Burdens in 2023: In Brief".

You get all four numbers at once, but day to day most renters work off one. Here's how to land on yours.

Conservative (20%) suits anyone pushing hard on savings or debt, and sits close to Dave Ramsey's stricter guidance once you adjust gross versus net.^[2] Recommended (30%) is the federal affordability line and the right default the first time you measure against it. Stretched (40%) is the honest tier for an expensive metro where 30% won't reach the apartment you need. The 50% band is a limit, not a plan, HUD's "severely cost burdened" line^[1] with almost no room for an emergency, which the Emergency Fund Calculator exists to cover. When unsure, start at Recommended and let local listings move you.

At the leasing office, ask for the gross rent, not the headline base rent, since utilities, parking, and amenity fees can bump a unit into the next tier, and check the income requirement first, many landlords want annual income of at least 40 times the monthly rent, the 30% rule in another form. Keep move-in costs (deposit plus first and sometimes last month) as a one-time savings goal, and re-run the number whenever your income shifts. If the budget won't stretch to the apartment you want, raise the number rather than settle: a roommate is the biggest lever (run each income on its own, then split fairly with the Rent Split Calculator), asking for a lower rate or waived fees works more often than expected, and widening the search a few blocks often buys more for the same money. Once rent is set, the Grocery Budget Calculator handles the next-biggest monthly line.

The most common way renters drift into a cost-burdened budget is applying 30% to take-home pay when the figure is built on gross income, which sets the number too high, for a net version use a tighter percentage like Ramsey's 25%. Close behind is forgetting the rest of the housing bill, insurance, parking, and utilities can tip a unit that hit the rent budget exactly into cost-burdened territory. And a national percentage says nothing about your city, so check local listings before trusting a tier, especially on seasonal or commission income, where you should budget off a conservative read of what you actually earn.