Finance category

Mortgage, loan, investing, tax, and money calculators.

Mortgage Affordability Calculator

Estimate the home price that may fit your income, existing debts, down payment, mortgage rate, and all-in monthly housing cost.

Gross annual income

Other monthly debts

Down payment

Mortgage rate

Loan term

Property tax rate

Insurance per month

HOA dues per month

Max back-end DTI

Estimated affordable price

$473,591

Estimated loan amount

$413,591

Max housing payment

$3,292

Modeled PITI + HOA

$3,292

How the math works

The calculator first turns your income and target debt-to-income ratio into a maximum monthly debt budget, then subtracts existing monthly debts to find room for housing.

The affordable price is solved by testing home prices until the estimated principal, interest, property tax, insurance, and HOA payment fits the monthly housing limit.

Editorial noteMaintained by EveryCalc - Reviewed June 2026

EveryCalc calculators are designed for fast, practical estimates with transparent inputs and no required account. We use plain formulas, visible assumptions, and related tools so visitors can check the result from more than one angle.

Results are informational only. For financial, tax, legal, medical, construction, or other high-impact decisions, verify the output against primary sources or a qualified professional.

Learn more about our review process on the EveryCalc methodology page.

Calculation notes and example

Mortgage affordability formula used here

The calculator starts with gross monthly income and applies a target back-end debt-to-income ratio to estimate the maximum monthly debt budget. Existing monthly debts are subtracted to leave a housing budget. It then solves for the home price where principal, interest, estimated property tax, insurance, and HOA dues fit inside that housing budget after the down payment is applied.

Worked example

If household income is $110,000, existing debts are $650 per month, and the target back-end DTI is 43%, the total debt budget is about $3,942 per month. After existing debts, about $3,292 remains for housing. A buyer can then test rates, down payment, taxes, insurance, and HOA dues to see the price range that fits before asking a lender for preapproval.

Edge cases and practical tips

Use a higher rate than today's quote when you want a stress test.
Property taxes and insurance can vary sharply by county, property type, and carrier.
Lender approval can differ from comfort; use a lower DTI if you want more room for savings and repairs.

Useful companion tools: Mortgage Calculator, Debt-to-Income Calculator, Down Payment Calculator, and Rent vs Buy Calculator.

How to interpret the mortgage affordability result

Best use

Use the result as a planning number for comparing payments, rates, returns, tax reserves, or cash-flow choices before you request a quote or make a commitment.

Cross-check

Compare the answer with the contract, lender estimate, tax form, brokerage statement, payroll record, or invoice that will control the real-world outcome.

Watch for

Do not rely on a single optimistic rate, return, or fee assumption. Money pages work best when you run low, base, and high cases and keep professional advice separate from the estimate.

This page belongs to the Finance calculator library, so the answer should be read in the context of the decision you are modeling rather than as a universal rule.

Before relying on this mortgage affordability estimate

Most calculator mistakes come from the inputs, not the arithmetic. Use this short audit before you reuse the answer in a spreadsheet, quote, application, or important conversation.

Confirm source numbers

Match balances, rates, fees, taxes, income, and payment dates against the lender quote, payroll record, tax form, statement, invoice, or contract.

Separate cash flow from total cost

A lower monthly payment can still cost more over time if fees, interest, taxes, or a longer term are hidden in the structure.

Run conservative cases

Test at least one higher-cost or lower-return case before using the output for a purchase, refinance, investment, loan, or tax decision.

Rerun this page when the rate, price, term, fee, tax rule, income, expense, or expected holding period changes.

How to Use

Enter gross annual income before taxes and deductions.
Add recurring monthly debts such as auto loans, student loans, personal loans, and credit card minimums.
Enter down payment, mortgage rate, term, property tax, insurance, HOA dues, and target back-end DTI.
Review the estimated affordable home price and modeled PITI plus HOA payment.
Run a lower price or higher rate scenario before shopping so the approval target is not too tight.

Frequently Asked Questions

What does this mortgage affordability calculator estimate?

It estimates the home price that fits a target back-end debt-to-income ratio after existing debts and modeled housing costs are included.

Does this replace lender preapproval?

No. Lenders also evaluate credit, reserves, assets, loan program rules, property type, mortgage insurance, and documentation. Use this as a planning estimate before preapproval.

Why include taxes, insurance, and HOA dues?

A home can look affordable on principal and interest alone but become stretched once property tax, homeowners insurance, HOA dues, and other required housing costs are included.

What DTI should I use?

A 43 percent back-end DTI is a common reference point, but acceptable ratios vary by lender and loan program. Use a lower ratio if you want more monthly breathing room.