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Home Affordability Calculator

Find out how much house you can afford based on your income, debts, and down payment using the 28/36 DTI rule.

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How Much House You Can Afford
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Maximum Home Price
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Max Monthly Payment
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Debt-to-Income Ratio
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Principal & Interest
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Property Taxes
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HOA Fees

How Much House Can You Afford?

Buying a home is the largest financial decision most people will ever make, and understanding how much you can truly afford is the critical first step. Lenders, financial advisors, and real estate professionals all rely on a set of established guidelines to determine a safe borrowing range. The most widely used standard is the 28/36 rule, which forms the foundation of the calculations in this tool.

The 28/36 Rule Explained

The 28/36 rule establishes two key thresholds for your debt-to-income (DTI) ratio. The front-end ratio (28%) states that your total monthly housing costs should not exceed 28% of your gross monthly income. Housing costs include your mortgage principal and interest, property taxes, homeowner's insurance, and any HOA fees. This calculator uses the 28% front-end ratio to determine the maximum home price you can afford.

The back-end ratio (36%) takes a broader view. It says that your total monthly debt obligations — housing costs plus all other recurring debts like car payments, student loans, credit card minimums, and personal loans — should stay below 36% of your gross monthly income. If your existing debts are high, the back-end ratio may limit how much you can borrow even if the front-end ratio would allow more. This calculator accounts for both ratios and uses the more conservative result.

Understanding Debt-to-Income Ratios

Your DTI ratio is one of the most important factors lenders evaluate when reviewing a mortgage application. A lower DTI signals to lenders that you have a healthy balance between debt and income, making you a less risky borrower. Most conventional lenders prefer a back-end DTI of 36% or lower, though some government-backed loan programs like FHA loans may allow DTI ratios up to 43% or even 50% in certain cases. However, just because a lender will approve a higher DTI does not mean it is financially wise. A DTI above 36% leaves very little room for unexpected expenses, savings, or lifestyle changes.

Hidden Costs of Homeownership

The monthly mortgage payment is only one part of the true cost of owning a home. Many first-time buyers are caught off guard by expenses that do not show up in a basic mortgage calculation. Closing costs typically range from 2% to 5% of the home purchase price and are due at the time of sale. If your down payment is less than 20%, most lenders require private mortgage insurance (PMI), which can add $50 to $200 or more per month. Home maintenance and repairs are an ongoing reality — a common rule of thumb is to budget 1% to 2% of your home's value each year for upkeep. A $300,000 home means $3,000 to $6,000 annually for things like HVAC servicing, roof repairs, plumbing issues, and appliance replacements. Utility bills, landscaping, and potential special assessments in HOA communities add even more.

Tips for First-Time Home Buyers

Save more than the minimum down payment. While some loan programs allow down payments as low as 3% or 3.5%, a larger down payment reduces your loan amount, eliminates PMI, and lowers your monthly payment. Aim for 20% if possible. Get pre-approved, not just pre-qualified. Pre-approval involves a thorough review of your finances and gives you a concrete budget when house hunting. Do not spend up to your maximum. Just because you qualify for a $350,000 home does not mean you should buy one. Leave a buffer in your budget for savings, emergencies, and enjoying life outside of your mortgage. Factor in future changes. Consider whether your income is likely to change, whether you plan to start a family, and whether the property taxes in your area tend to increase over time. Shop around for mortgage rates. Even a quarter-point difference in your interest rate can save tens of thousands of dollars over the life of a 30-year loan. Compare offers from at least three lenders before committing.

This calculator provides a starting point based on widely accepted lending standards. Your actual borrowing capacity will depend on your credit score, employment history, the specific loan program you choose, and other factors that lenders evaluate on a case-by-case basis. Use the results as a guide, and consult with a qualified mortgage professional for personalized advice.