The 30% rule
The oldest guideline in renting: keep housing costs at or below 30% of gross income. On a $5,000 monthly income that's $1,500. The rule persists because it usually leaves enough for savings, debt, and living once other essentials are covered. It's a starting point, not a law — but consistently blowing past it is the most common cause of a permanently tight budget.
Why your other debts change the answer
The 30% rule assumes typical debt levels. If you already carry heavy car or loan payments, the same rent becomes a squeeze. That's why this calculator also shows a ceiling based on a 43% total debt-to-income limit minus your existing payments — the same logic landlords and lenders use. The lower of "30% of income" and "what's left under the DTI cap" is your honest maximum.
Costs renters forget
- Utilities (electricity, gas, water, internet) can add $150–$300+ monthly on top of rent.
- Renter's insurance — inexpensive but real.
- Upfront cash: most leases need first month plus a deposit (sometimes last month too), so budget 2–3× the monthly rent to move in.
When 30% is impossible
In expensive cities, 30% may not rent anything livable, and many people spend 40–50% out of necessity. If that's you, protect savings at all costs (even 10%), consider roommates to split fixed costs, or weigh a longer commute against the rent difference. High rent relative to income is a structural signal — sometimes the real fix is location or housemates, not tighter budgeting.