Mortgage Affordability Calculator

How This Mortgage Affordability Calculator Works

This mortgage affordability calculator estimates how much house you may be able to afford based on your income, monthly debt, down payment, mortgage interest rate, loan term, property tax estimate, homeowners insurance, PMI, HOA fees, and debt-to-income assumptions.

The calculator first estimates your gross monthly income. It then compares a housing debt-to-income limit with a total debt-to-income limit. The lower available housing budget is used to estimate a home price that fits the numbers entered.

What this calculator includes

• Annual household income

• Monthly debt payments

• Down payment amount

• Mortgage interest rate

• Loan term

• Housing DTI and total DTI limits

• Estimated property taxes

• Estimated homeowners insurance

• Optional PMI, HOA fees, and monthly budget buffer

• Estimated affordable home price

• CSV, PDF, and print options

What Is Debt-to-Income Ratio?

Debt-to-income ratio, often called DTI, compares monthly debt payments to gross monthly income. Mortgage affordability estimates often look at two ratios: the housing ratio and the total debt ratio.

• Ratio: Housing DTI
  What It Measures: Estimated housing payment divided by gross monthly income.
  Common Planning Estimate: About 28% for a conservative planning estimate.

• Ratio: Total DTI
  What It Measures: Housing payment plus other monthly debt divided by gross monthly income.
  Common Planning Estimate: About 36% for a conservative planning estimate.

Some loan programs and lenders may allow higher ratios, while others may require lower ratios depending on credit, reserves, loan type, and other risk factors.

What Affects How Much House You Can Afford?

Income

Higher income generally increases the amount of monthly housing payment that may fit within a debt-to-income estimate.

Monthly debt

Car payments, student loans, credit cards, personal loans, and other debt payments reduce the amount of monthly budget available for a mortgage payment.

Down payment

A larger down payment can lower the loan amount, reduce monthly principal and interest, and may reduce or eliminate PMI.

Interest rate

Higher interest rates reduce affordability because more of the monthly payment goes toward interest. Lower rates can increase estimated affordability.

Taxes, insurance, PMI, and HOA fees

These costs can significantly affect affordability because they are part of the monthly housing payment even though they do not reduce the mortgage balance.

Mortgage Affordability vs. Mortgage Payment

A mortgage affordability calculator works backward from income and debt to estimate a possible home price. A mortgage payment calculator starts with a home price and estimates the monthly payment.

• Calculator: Mortgage Affordability Calculator
  Main Purpose: Estimate a possible home price based on income, debt, down payment, and DTI assumptions.
  Best For: Planning before shopping for homes.

• Calculator: Mortgage Payment Calculator
  Main Purpose: Estimate the monthly payment for a specific home price and loan amount.
  Best For: Comparing specific homes and mortgage scenarios.

• Calculator: Mortgage Amortization Calculator
  Main Purpose: Show how the mortgage balance changes over time.
  Best For: Reviewing principal, interest, payoff date, and extra payment impact.

Related Mortgage and Finance Calculators

Use these related CalcuCenter tools to compare payments, amortization, affordability, refinancing, renovation financing, and general loan costs.

• Mortgage Payment Calculator
  Estimate monthly housing cost including principal, interest, taxes, insurance, PMI, and HOA.

• Mortgage Amortization Calculator
  See principal, interest, remaining balance, payoff dates, and extra-payment savings.

• Mortgage Refinance Calculator
  Compare current and proposed mortgage payments, closing costs, break-even time, and savings.

• FHA 203(k) Renovation Loan Calculator
  Estimate renovation financing, repair budgets, mortgage insurance, and monthly costs.

• Loan Payment Calculator
  Estimate monthly payments, total interest, extra payments, and payoff timing.

• All Mortgage Calculators
  Browse mortgage tools for payments, amortization, affordability, refinancing, and renovation financing.

Mortgage Affordability Calculator FAQ

How much house can I afford?

How much house you can afford depends on income, monthly debt, down payment, interest rate, loan term, property taxes, insurance, PMI, HOA fees, and debt-to-income limits.

What debt-to-income ratio should I use?

A common conservative estimate is 28% for housing costs and 36% for total debt, but actual lender requirements may vary by loan type, credit profile, reserves, and other factors.

Does a larger down payment increase affordability?

Yes. A larger down payment can reduce the loan amount, lower the monthly principal and interest payment, and may reduce PMI.

Do property taxes and insurance affect affordability?

Yes. Property taxes and homeowners insurance are part of the monthly housing cost and can reduce the home price that fits within a monthly budget.

Does this calculator include PMI and HOA fees?

Yes. You can enter monthly PMI and monthly HOA fees. These costs are included in the estimated monthly housing payment.

Why is the estimate different from a lender preapproval?

A lender may use different income rules, credit requirements, debt calculations, loan program guidelines, taxes, insurance estimates, and underwriting standards.

Can I use this before shopping for a house?

Yes. This calculator is useful for early planning because it estimates a home price range before you compare specific properties.

Is this affordability calculator exact?

No. It provides estimates for planning and education. Actual affordability and loan approval may vary based on lender rules, credit, income documentation, taxes, insurance, PMI, HOA fees, and loan type.