Mortgage Affordability Calculator

As you start touring homes, it helps to know your real budget. This may not be what a lender might approve, but what fits comfortably into your life. Income, existing commitments, your down payment, and today's interest rates all shape that number.

This is especially useful for buyers relocating from overseas or across the country, who are often navigating an unfamiliar market and mortgage process for the first time, and for anyone comparing Wellesley, Newton, Weston, and other towns with different property tax rates.

Use the calculator below to get a starting estimate. It's a planning tool, not a mortgage pre-approval..

Estimate how much home you may be able to afford. Adjust the numbers below to match your situation.

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Car loans, student loans, credit cards, and other recurring debts — not including your future mortgage.

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Based on Freddie Mac's most recently published national average for a 30-year fixed rate. Your actual rate will depend on your lender and credit profile.

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Annual rate, as a percentage of home value. Varies by town — adjust to match where you're looking.

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Estimated monthly payment

Principal & interest $0
Property tax $0
Homeowners insurance $0
Total estimated monthly payment $0

Estimated home price you can afford

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Your contact info

This estimate uses a common lending guideline: keeping your total monthly housing payment at or below 28% of gross income, and total monthly debts (including housing) at or below 36%, per the Consumer Financial Protection Bureau. Actual loan approval depends on your credit, lender, and full financial picture — this is a starting point for planning, not a pre-approval.

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