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Mortgage Affordability & Pre-Qualification Calculator

Find your maximum home price based on your income, existing debts, and current mortgage rates. Uses the same debt-to-income ratios that lenders apply during underwriting.

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Updated 2025–2026

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Mortgage Affordability & Pre-Qualification Calculator

Find your maximum home price based on your income, existing debts, and current mortgage ra...

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📊 Affordability Analysis
Max Monthly Payment
Max Loan Amount
Max Home Price
Monthly Payment (at max)

*Based on front-end DTI. Lenders also consider credit score, reserves, and back-end DTI.

What is the Affordability Calculator?

Mortgage affordability is determined primarily by your debt-to-income (DTI) ratio — the percentage of your gross monthly income that goes toward debt payments. Lenders use two key ratios: the front-end ratio (housing costs only, typically capped at 28–31%) and the back-end ratio (all debt including housing, typically capped at 36–43%). Our calculator uses industry-standard DTI thresholds to estimate the maximum home price you can qualify for given your income, existing debts, and down payment.

How to Use This Calculator

  • 1Enter your annual household gross income (before taxes).
  • 2Add your total monthly debt payments (car loans, student loans, credit cards — minimum payments).
  • 3Enter your available down payment amount.
  • 4Input the current interest rate you expect to qualify for.
  • 5Select your loan term (30, 20, or 15 years).
  • 6Choose a DTI ratio target — 28% is conservative, 36% is standard, 43% is the FHA maximum.
  • 7Click Calculate to see your maximum monthly payment, loan amount, and home price.

⚖️ Attorney's Role

Before signing a purchase contract, your real estate attorney reviews the terms, contingencies, and timeline to ensure the contract protects you if financing falls through. Attorney-drafted financing contingencies give you the legal right to exit the contract and recover your earnest money if you can't secure a mortgage at acceptable terms.

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Frequently Asked Questions

Everything you need to know about affordability in real estate transactions

At a $100,000 salary with no existing debts, a 20% down payment, 6.75% rate, and standard 36% DTI, you could afford approximately $380,000–$430,000. With debts or a lower down payment, that range drops. Use our calculator with your specific numbers for a personalized estimate.
DTI is the percentage of your gross monthly income used for debt payments. Lenders calculate two types: front-end DTI (housing costs only — typically max 28–31%) and back-end DTI (all monthly debts — typically max 36–43%). The lower your DTI, the better your loan approval odds and the more favorable your interest rate.
Your credit score directly impacts the interest rate you receive. A 760+ score may qualify for rates 0.5–1.0% lower than a 680 score. On a $400,000 mortgage, that difference can mean $100–$200/month more or less in payment, significantly affecting your affordability range. Get pre-approved to know your actual rate.
Pre-qualification is an informal estimate based on self-reported information. Pre-approval involves a hard credit pull and document verification — it's a conditional commitment from the lender. Sellers and their attorneys take pre-approval much more seriously. Always get pre-approved before making an offer in competitive markets.
A 30-year mortgage has lower monthly payments but higher total interest. A 15-year mortgage saves significantly on interest but requires higher monthly payments. Your real estate attorney can advise on which structure works best given your financial goals, especially if you plan to sell within a certain timeframe or use the property for estate planning.

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