House Affordability Calculator

Income

Your gross monthly income is the foundation of affordability calculations. Lenders typically use your pre-tax income to determine how much you can borrow. Higher income allows you to qualify for a larger loan, assuming other factors are favorable.

Existing Debt

Your existing monthly obligations (car loans, student loans, credit card payments, etc.) affect how much additional debt you can take on. Higher existing debt reduces your capacity for a mortgage payment.

Down Payment

The amount you can put down upfront affects both the loan amount needed and potentially the interest rate. A larger down payment may help you qualify for better loan terms and avoid private mortgage insurance (PMI) if it's at least 20% of the home price.

Interest Rate

Even small changes in interest rates can significantly impact affordability. Lower rates increase your buying power by reducing the monthly payment for the same loan amount.

Property Taxes and Insurance

These ongoing expenses are part of your monthly housing costs. Higher property tax rates or insurance premiums reduce the amount you can put toward principal and interest payments.

Credit Score

While not directly factored into this calculator, your credit score significantly impacts the interest rate you'll qualify for. A better credit score typically means lower interest rates and higher affordability.

Front-End Ratio (28%)

Your monthly housing costs (principal, interest, taxes, and insurance) should not exceed 28% of your gross monthly income. This is sometimes called the housing ratio.

Back-End Ratio (36%)

Your total monthly debt payments (including housing costs, plus car loans, student loans, credit card minimums, etc.) should not exceed 36% of your gross monthly income. This is also called the debt-to-income (DTI) ratio.

How Lenders Use the Rule

Lenders use these ratios as starting points, but other factors may affect your approval:

• Strong credit scores or substantial assets might allow for higher ratios
• FHA loans may allow back-end ratios up to 43%
• Some conventional loans might permit up to 45% for back-end ratios with compensating factors
• VA loans focus more on residual income rather than strict ratio requirements

Improve Your Credit Score

A higher credit score can qualify you for lower interest rates, which increases your buying power. Focus on paying bills on time, reducing credit card balances, and avoiding new credit applications before applying for a mortgage.

Pay Down Existing Debt

Reducing or eliminating other debt obligations frees up more of your income for housing costs. Target high-interest debt first, such as credit cards.

Save for a Larger Down Payment

A larger down payment reduces the loan amount needed and may eliminate the need for PMI. Consider using gift funds from family, down payment assistance programs, or delaying your purchase to save more.

Consider Different Loan Terms

A 30-year loan will have lower monthly payments than a 15-year loan, which could help you qualify for a more expensive home. However, you'll pay more in interest over the life of the loan.

Look in Different Areas

Property tax rates and insurance costs vary by location. Looking in areas with lower property taxes or insurance rates can increase your home buying budget.

Consider Housing Costs Beyond the Mortgage

Remember that homeownership includes costs beyond your mortgage payment, such as maintenance, utilities, and potentially HOA fees. Budget for these to avoid becoming "house poor."