Home Affordability Calculator – How Much House Can You Afford?

Why Use This Affordability Calculator

Buying a home is one of the biggest financial decisions you’ll make. This affordability calculator helps you understand your budget before you start house hunting. Whether you’re asking “how much home can we afford?” or “how much house payment can I afford?”, this tool helps you:

• 💰 Find Your Maximum Home Price — know exactly how much house you can afford.
• 📊 Understand Your DTI — see your front-end and back-end debt-to-income ratios.
• 📈 See the Full Monthly Payment — includes taxes, insurance, and HOA fees.
• 🔁 Compare Scenarios — adjust inputs to see how they affect affordability.
• 📜 Track Your History — save, review, and export past calculations to CSV or Excel.
• 🔒 100% Private — all calculations run locally; your data never leaves your browser.

How the Home Affordability Calculator Works

Key Formulas

Front-End DTI = (Housing Expenses ÷ Gross Monthly Income) × 100

Back-End DTI = (Total Monthly Debts ÷ Gross Monthly Income) × 100

Maximum Home Price Calculation

1. Calculate maximum monthly housing payment based on:
   • Front-End DTI limit: (Annual Income ÷ 12) × (Front-End DTI / 100)
   • Back-End DTI limit: ((Annual Income ÷ 12) × (Back-End DTI / 100)) − Monthly Debts
2. Take the lower of the two limits.
3. Subtract property tax, insurance, and HOA fees to get the maximum principal & interest payment.
4. Use the mortgage formula to calculate the maximum loan amount.
5. Add your down payment to get the maximum home price.

How to Use This Home Affordability Calculator

1. Select your account currency from the picker in the site header.
2. Enter your annual household income (before taxes).
3. Enter your monthly debt payments (credit cards, auto loans, student loans, etc.).
4. Enter your down payment.
5. Enter the mortgage interest rate.
6. Choose your loan term.
7. Enter property tax, insurance, and HOA fees for your area.
8. Adjust the DTI limits if needed (default: 28% front-end, 36% back-end).
9. The tool updates instantly — see your maximum affordable home price, monthly payment, and DTI ratios.

Frequently Asked Questions

How much house can I afford?

The amount depends on your income, debts, down payment, interest rate, and lender guidelines. This home affordability calculator gives you a clear estimate based on standard DTI limits.

How is maximum home price calculated?

The affordability calculator uses your income, debts, down payment, and interest rate to determine the maximum loan amount you can qualify for — then adds your down payment to show the total home price you can afford.

What are front-end and back-end DTI limits?

Front-end DTI is the percentage of your income going toward housing costs. Back-end DTI includes all monthly debts. Lenders typically use 28% and 36% as guidelines, but this calculator lets you adjust them.

How expensive of a house can I afford?

This home affordability calculator factors in your full financial picture — including taxes, insurance, and HOA fees — so you can see how expensive of a home you can truly afford.

How much home can you afford on a $100,000 salary?

With a $100,000 salary, minimal debts, and a 20% down payment, you can typically afford a home in the $300,000-$400,000 range, depending on interest rates and taxes. Use this calculator to get a personalized estimate.

Is my data stored anywhere?

No. All calculations run locally in your browser. History and presets are saved in your browser’s localStorage — nothing is sent to a server.