Rent is the biggest recurring decision most budgets ever make. This calculator turns income into a range — comfortable, standard, and ceiling — rather than one false-precision number.
The 30% rule and where it came from
Since 1981, US housing policy has labeled households spending over 30% of gross income on housing as cost-burdened. The threshold stuck: landlords screen against it (often phrased as "income must be 3× rent"), and budget frameworks build on it. On $5,000 gross monthly income, 30% is a $1,500 rent budget.
Reading your range
Below 25%, housing sits lightly on the budget and savings breathe — that's the comfortable line. Between 30% and 40%, each point squeezes the flexible buckets. Past 40%, you're deep in rent-burdened territory: one surprise expense from stress. The slider lets you set your own share deliberately — the honest move in expensive cities isn't pretending 30% works, it's choosing 35% consciously and trimming elsewhere.
Why debts subtract straight off the top
A $600 car payment doesn't care what your rent is — it's owed regardless. Subtracting fixed debt payments from the housing budget keeps the combined obligation load inside the guideline, the same logic mortgage lenders apply as debt-to-income ratios. Working on the debt side? The debt payoff and credit card payoff calculators find the fastest route out.
Gross vs net, and the bigger picture
The rule uses gross income because that's what landlords verify. If you'd rather plan from take-home pay, aim for 35–40% of net as the equivalent zone — then let the 50/30/20 budget calculator place rent inside the needs bucket and show what's left.
A guideline, not financial advice.