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Mortgage Affordability Calculator
Estimate how much house you can afford using front-end and back-end DTI rules, with transparent monthly cost breakdown.

This estimate is for informational planning only and is not lending, tax, legal, or underwriting advice.

Quick Estimate
US-focused affordability estimate using front-end and back-end DTI rules.

Step 1: Income and debt

Before tax income from all stable sources.

Car loans, student loans, credit card minimums, etc.

Advanced options
Conservative / Standard / Aggressive
Three scenario cards help you compare risk appetite quickly.
Conservative
Front 28% / Back 36%

$433,395

Housing budget: $3,150.00/mo

Back-end achieved: 35.56%

Standard
Front 31% / Back 43%

$483,775

Housing budget: $3,487.50/mo

Back-end achieved: 38.55%

Aggressive
Front 33% / Back 50%

$517,386

Housing budget: $3,712.50/mo

Back-end achieved: 40.55%

How we calculated this

1) Gross monthly income = annual income / 12.

2) Front-end max housing = income × front-end limit.

3) Back-end max housing = income × back-end limit - monthly debts.

4) Allowed housing budget = minimum of front-end and back-end budgets.

5) Binary search solves for home price where monthly housing cost (PITI + HOA + PMI) stays within budget.

PMI is estimated and can be overridden in Advanced options.

Mortgage Affordability Calculator

Use this calculator to estimate a practical home budget based on your income, debt load, and housing cost assumptions.

Housing cost includes principal and interest, property tax, homeowners insurance, HOA and PMI (if applicable).

Final loan approval depends on lender rules, underwriting, and verified financial documentation.

  • US-focused assumptions
  • Transparent DTI math
  • Scenario comparisons for risk tolerance

What counts as housing costs (PITI + HOA + PMI)

PITI includes principal, interest, taxes, and insurance. We then add HOA and PMI to represent full monthly housing burden.

Understanding DTI (front-end vs back-end)

Front-end focuses on housing only; back-end includes all monthly debt obligations. Lenders often evaluate both together.

Common affordability scenarios

  • Higher debt payments reduce affordability even with strong income.
  • Lower rates can increase affordability more than modest down payment changes.
  • High tax and HOA regions reduce maximum price relative to low-cost regions.

FAQ

What is DTI?

Debt-to-income ratio compares monthly debt obligations to gross monthly income. Lenders often review both housing-only and total-debt DTI.

Does HOA count in affordability?

Yes. HOA is included as a monthly housing cost because it impacts real monthly affordability.

When do I pay PMI?

PMI is generally required when down payment is below 20%. This calculator estimates PMI and lets you override rate assumptions.

How do property taxes affect affordability?

Higher annual tax reduces how much principal and interest you can support at the same monthly budget.

How does 15 vs 30 year term change results?

Shorter terms raise monthly principal and interest, which usually lowers maximum affordable home price.

How does interest rate change affordability?

Higher rates raise monthly principal and interest at the same loan amount, reducing affordability.

Is this a lender approval result?

No. This is an informational estimate only. Final lending decisions require underwriting and verified documentation.

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Before you use this tool

Turnaa calculators and generators are built to help you prepare drafts and estimates faster. They are intended for informational use and workflow support, not as legal, financial, tax or accounting advice.

Useful notes

  • Always review generated outputs before sharing, signing or filing.
  • Tax and legal rules can vary by country, state and business type.
  • Use official advisors and authorities for final compliance decisions.

Legal disclaimer

  • No attorney-client, tax advisor or fiduciary relationship is created.
  • Outputs may contain errors and should be independently validated.
  • Turnaa is not liable for decisions made solely using generated drafts.