Rent Affordability Calculator
Calculate the maximum rent you can afford based on your gross monthly income using the 30% rule.
How to use this tool
- Enter gross monthly income and rent budget rule in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your maximum monthly rent and the full breakdown beneath it.
The 30% rule says rent should be no more than 30% of gross income. Adjust the percentage to match your own budgeting philosophy.
⚠ This tool provides general estimates for education only and is not financial, tax or legal advice. Figures may not reflect your situation — verify with a qualified professional.
Formula
Maximum Monthly Rent = Gross Monthly Income × (Rent Budget Rule ÷ 100)
Annual Rent Budget = Maximum Monthly Rent × 12
How it works
This calculator applies a user-defined income-to-rent percentage rule — most commonly the 30% rule — to determine the largest monthly rent that keeps housing costs within budget. Multiplying by 12 converts the monthly limit into an annual budget. The 30% threshold is a widely used guideline, but actual affordability depends on local costs, savings goals, and other fixed expenses; the rule percentage can be adjusted to reflect your personal situation.
Worked example
- Gross monthly income = $5,000; Rent budget rule = 30%.
- Maximum monthly rent = $5,000 × (30 ÷ 100) = $5,000 × 0.30 = $1,500.
- Annual rent budget = $1,500 × 12 = $18,000.
Maximum monthly rent: $1,500.00 | Annual rent budget: $18,000.00
Common mistakes to avoid
- Using net (take-home) pay instead of gross monthly income -- the 30% rule is applied to gross income by most landlords and lenders.
- Ignoring renters insurance, parking, and utilities when comparing the result to a listed rent, causing the true housing cost to exceed the calculated budget.
- Applying the 30% rule rigidly in high-cost cities where 30% of median income is far below median rent, leading to unrealistic expectations.
Key terms
- 30% rule
- A common personal finance guideline suggesting that no more than 30% of gross monthly income should be spent on housing costs.
- Gross monthly income
- Total monthly earnings before taxes and deductions, used as the base for the affordability calculation.
- Maximum monthly rent
- The highest rent payment considered affordable given your income and the chosen budget percentage.
- Annual rent budget
- The total amount you could spend on rent over a full year, equal to the monthly limit multiplied by 12.
- Rent burden
- The share of income consumed by rent; households spending more than 30% of income on rent are considered 'cost-burdened' by housing economists.
Frequently asked questions
- What is the 30% rule for rent?
- The 30% rule suggests spending no more than 30% of your gross monthly income on rent. Some financial advisors use a stricter 25% or 28% guideline to leave more room for savings and other expenses.
- Should I use gross or net income for the rent rule?
- The traditional 30% rule uses gross (pre-tax) income. If you use net (after-tax) income, you may want to use a higher percentage—around 35-40% of net—to arrive at a similar absolute dollar limit.