Finance

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Home Affordability Calculator.

Calculate how much house you can afford based on income and debts

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Set your values

Results update as you type.

Your finances

Include car loans, student loans, credit card minimums, and other recurring debt — but not rent or your future mortgage.

Property details

Maximum home price

$322,340
moderate affordability
Monthly payment: $2,333.00

Monthly payment

$2,333.00
Loan amount: $302,340.00

Loan amount

$302,340.00
Debt-to-income ratio: 34.0%

Debt-to-income ratio

34.0%
Principal & interest: $1,911.00

Principal & interest

$1,911.00

Budget insight

At this home price, your total monthly debt payments would come to a debt-to-income ratio of 34.0%.

FAQs

What is the 28/36 rule?

It is a common lender guideline: you should spend no more than 28% of your gross monthly income on housing costs, and no more than 36% on total debt payments (including mortgage, car loans, etc.).

What is Debt-to-Income (DTI) ratio?

DTI is your total monthly debt payments divided by your gross monthly income. Most conventional loans require a DTI below 43%, though some government programs go higher.

Does this include property taxes and insurance?

Yes, our calculator estimates property taxes and homeowners insurance to give you a more accurate picture of your total monthly housing payment.

Cite this calculator

Canonical URL: https://mathify.one/fr/finance/home-affordability

Cite as: Mathify. (2026). Calculateur de Capacite d'Achat. https://mathify.one/fr/finance/home-affordability

Use Cases

Plan your home search budget

Determine a realistic price range before browsing listings, so you focus on homes you can afford.

Example: Input $80,000 income and $500 monthly debts to see a max home price.

Compare affordability scenarios

Adjust down payment or debt levels to see how they affect your buying power.

Example: Increase down payment from 10% to 20% to see a higher price range.

Frequently Asked Questions

How does the home affordability calculator work?
It uses your income and debts to estimate a comfortable home price range, typically by applying a debt-to-income ratio and down payment assumptions.
What inputs do I need to use this calculator?
You'll need your gross annual income, monthly debt payments, down payment amount, and possibly interest rate and loan term to get an estimate.
Is the result a guaranteed loan approval amount?
No, it's an estimate. Lenders consider additional factors like credit score, assets, and exact debt ratios, so final approval may differ.

Tips & Common Mistakes

Tips

  • Enter your gross annual income (before taxes) for accuracy.
  • Include all monthly debt payments like car loans, student loans, and credit card minimums.
  • Consider a down payment of at least 20% to avoid private mortgage insurance (PMI).
  • Use the result as a starting point, then get pre-approved by a lender.

Common Mistakes to Avoid

  • Forgetting to include all monthly debts, which can overestimate affordability.
  • Using net income instead of gross income, leading to a lower estimate.
  • Ignoring additional homeownership costs like property taxes, insurance, and maintenance.

Last updated: August 13, 2026