Rent Affordability Calculator

Find how much rent you can afford based on your income using the 30% rule, plus a debt-aware estimate. Enter your monthly income and debts for an instant, validated recommendation.

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Rent Affordability

How much rent can I afford?

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Recommended Max Rent
Debt-Aware Max (36% rule)
Annual Rent at Max
Rent vs Remaining Income

How Much Rent Can You Afford?

The most common guideline is the 30% rule: spend no more than 30% of your gross (pre-tax) monthly income on rent. If you earn $5,000 per month, that's a $1,500 maximum. Many landlords use a related rule — requiring that your annual income be at least 40× the monthly rent (the "40x rule"), which works out to about the same 30% threshold.

The 30% rule is a starting point, not a hard limit. In high-cost cities many people spend 35–50% (becoming "rent-burdened"), while aggressive savers target 20–25%. A smarter check factors in your other debts: the 36% rule says total monthly debt payments, including rent, shouldn't exceed 36% of gross income. This calculator shows both the straight percentage recommendation and a debt-aware maximum so you can budget realistically.

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The 30% Rule

Max rent = 30% of gross monthly income. A widely used affordability benchmark for budgeting and landlord screening.

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The 36% Rule

Total debts plus rent should stay under 36% of gross income. The debt-aware figure subtracts your existing monthly debt payments.

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High-Cost Cities

In expensive metros, 30% may be unrealistic. Spending over ~30% makes you "rent-burdened" — fine short-term, but watch your savings rate.

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Landlord 40x Rule

Many landlords require annual income ≥ 40× monthly rent (e.g., $60,000/yr qualifies for $1,500 rent). That mirrors the 30% guideline.

Formula & Logic

The traditional guideline caps rent at 30% of gross income, a threshold that originated in US housing policy and is now the standard definition of being "cost-burdened". Many landlords apply a stricter test, requiring gross annual income of 40 times the monthly rent — which works out at 30% exactly, since 40 × monthly rent ÷ 12 months is 3.33 times annual rent. The guideline is increasingly unrealistic in expensive metros, where a majority of renters exceed it, and the more useful personal test is what remains after rent and taxes rather than the ratio itself.

Maximum rent = Gross monthly income × 30%Landlord test: Gross annual income ≥ 40 × monthly rentCost-burdened above 30%; severely cost-burdened above 50%

where:

gross income
before tax — the convention both the guideline and landlords use
30%
the affordability threshold in US housing policy
40×
the equivalent landlord screening rule

Assumptions: Uses gross income, so the share of take-home pay is considerably higher — often 40% or more of what actually lands in the account. Excludes utilities, renters insurance and parking, which many buildings charge separately.

Step-by-Step Example: What Rent Does $78,000 Support?

Apply both the 30% rule and the landlord 40× test, then check against take-home pay.

  • Gross salary$78,000
  • Estimated take-home$4,850/month
  1. Gross monthly income: $78,000 ÷ 12 = $6,500.
  2. The 30% guideline: $6,500 × 0.30 = $1,950 a month.
  3. The landlord 40× test: $78,000 ÷ 40 = $1,950 — the same figure, as expected.
  4. Now against take-home: $1,950 ÷ $4,850 = 40.2% of actual income.
  5. Remaining after rent: $4,850 − $1,950 = $2,900 for everything else.
  6. At a stricter 25% of gross the rent would be $1,625, leaving $3,225.

Result$1,950 a month qualifies — but that is 40% of take-home pay

The gap between 30% of gross and 40% of net is the reason the guideline feels tighter in practice than it sounds. Someone in a high-tax state sees an even wider gap, which is why the ratio is better treated as a landlord screening threshold than a personal affordability test.

Rent Affordability FAQ

The 30% rule recommends spending no more than 30% of your gross (pre-tax) monthly income on rent. At $4,000/month income, that's a $1,200 max. It's a long-standing budgeting guideline that helps ensure enough is left for savings, debt, and other living costs.
The 30% rule traditionally uses gross (pre-tax) income, and that's what landlords screen against. However, budgeting against your take-home (net) pay is more conservative and realistic — if 30% of gross feels tight after taxes, target a lower percentage. Enter your gross income here and adjust the percentage to taste.
The 36% rule (the back-end DTI ratio lenders use) says your total monthly debt payments — rent plus car loans, student loans, credit cards, etc. — should not exceed 36% of gross monthly income. This calculator's debt-aware figure takes 36% of your income and subtracts your existing debts to show a safer rent ceiling.
Under the 30% rule you'd want about $6,667 gross per month ($80,000/year), since $2,000 ÷ 0.30 = $6,667. Many landlords using the 40x rule would require roughly $80,000 annual income for $2,000 rent. Enter $2,000 worth of income scenarios above to see your own threshold.

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✔ Written & reviewed by Dr Sam — 20+ yrs in management & research leadership📅 Last updated June 2026📑 How we build & check these