How Much House Can I Afford?
Understanding your home-buying budget is the most important first step. Learn the formulas lenders use and find the price range that fits your financial life.
The 28/36 Rule: The Foundation of Affordability
Most lenders evaluate your affordability using the 28/36 rule, a pair of debt-to-income (DTI) ratios that serve as guardrails for responsible borrowing.
The 28% Front-End Ratio
Your total monthly housing costs — including principal, interest, taxes, and insurance (PITI) — should not exceed 28 percent of your gross monthly income. For example, if your household earns $8,000 per month before taxes, your maximum housing payment would be $2,240.
The 36% Back-End Ratio
Your total monthly debt payments — housing costs plus car loans, student loans, credit cards, and other obligations — should stay below 36 percent of your gross monthly income. Using the same $8,000 income, that means no more than $2,880 in total debt payments.
Keep in mind that these are guidelines, not hard limits. Some loan programs allow DTI ratios as high as 45 to 50 percent with compensating factors like strong credit scores or significant reserves.
The Income Multiplier Method
A quick way to estimate your price range is the income multiplier approach. As a general rule, most buyers can comfortably afford a home priced at 2.5 to 3 times their annual gross income. With a strong financial profile and low existing debt, some buyers stretch to 4 or even 5 times their income.
| Annual Income | Conservative (2.5x) | Moderate (3.5x) | Aggressive (5x) |
|---|---|---|---|
| $75,000 | $187,500 | $262,500 | $375,000 |
| $100,000 | $250,000 | $350,000 | $500,000 |
| $150,000 | $375,000 | $525,000 | $750,000 |
These are rough estimates. Your actual buying power depends on your credit score, down payment, interest rate, and existing debts.
Key Factors Lenders Evaluate
Your maximum loan amount is not determined by income alone. Lenders look at the full picture to assess risk and ensure you can comfortably repay the mortgage.
Credit Score
Your credit score directly influences the interest rate you qualify for. Higher scores unlock lower rates, which translates to a larger purchase price within the same monthly payment. Most conventional loans require a minimum score of 620, while FHA loans may accept scores as low as 580.
Down Payment
A larger down payment reduces your loan amount and may eliminate the need for private mortgage insurance (PMI). Putting down 20 percent avoids PMI entirely, but many programs allow as little as 3 to 3.5 percent down.
Employment History
Lenders typically want to see at least two years of stable employment in the same field. Gaps in employment or frequent job changes can raise red flags, though there are exceptions for career advancement moves.
Existing Debt Obligations
Car payments, student loans, credit card minimums, and other recurring debts all reduce the amount available for a mortgage payment. Paying down debt before applying can significantly increase your buying power.
Cash Reserves
Having two to six months of mortgage payments in savings after closing demonstrates financial stability and can help you qualify for a larger loan or better terms.
Property Taxes and Insurance
These costs vary dramatically by location and are included in your monthly housing expense calculation. A home with high property taxes may reduce the loan amount you qualify for compared to one with lower taxes at the same price.
How to Calculate Your Budget Step by Step
- 1
Calculate Your Gross Monthly Income
Add up all sources of income before taxes: salary, bonuses, freelance income, investment income, and any other regular earnings. If you are buying with a partner, combine both incomes.
- 2
Apply the 28 Percent Rule
Multiply your gross monthly income by 0.28 to find your maximum monthly housing payment. This amount should cover principal, interest, taxes, insurance, and HOA fees if applicable.
- 3
Tally Your Monthly Debts
List every recurring monthly obligation: car payments, student loans, credit card minimums, personal loans, and child support or alimony. This total plus your housing payment must stay below 36 percent of your gross income.
- 4
Factor in Your Down Payment
Your down payment determines how much you need to borrow. A larger down payment reduces your monthly payment and may eliminate PMI. Use your savings to determine the maximum home price: loan amount plus down payment equals purchase price.
- 5
Use a Mortgage Calculator
Plug your numbers into a mortgage calculator to see the exact monthly payment at different price points and interest rates. This gives you a realistic picture of what you can afford rather than relying on estimates alone.
Comfortable Budget vs. Maximum Approval
Just because a lender approves you for a certain amount does not mean you should borrow the maximum. The approval number reflects what you can technically repay, not what leaves room for savings, vacations, emergencies, and everyday life.
A good rule of thumb is to target a monthly payment that feels comfortable even if your income dipped slightly. Consider future expenses like children, career changes, and home maintenance costs (typically one to two percent of the home's value per year).
The best way to find your true comfort zone is to work with a mortgage professional who can run the numbers for your specific situation and help you see the full picture — not just the monthly payment, but the long-term financial impact.
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