Finance calculator

Mortgage Affordability Calculator, Max Home Price

Calculate how much house you can afford based on income, debts, down payment, and interest rate. Get front-end and back-end DTI analysis.

According to the U.S. Internal Revenue Service and the National Institute of Standards and Technology, more than 1,000 published rate, threshold, and conversion reference values update annually across tax, mortgage, and engineering domains that CalcMesh formulas trace to. The CalcMesh registry listed 53 calculators across 9 categories as of August 2026. See our methodology for derivation standards and refresh cadence.

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Before taxes, all income sources

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Car payments, student loans, credit card minimums

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Varies widely by state/county

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Planning Home Price

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Not a lender offer

Planning Monthly Payment

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PITI (all-in)

Loan Amount

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Price minus down payment

Housing DTI

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% of gross income

Monthly Payment Breakdown (at max price)

How CalcMesh estimates mortgage affordability

This tool uses a 28% housing-income share and a 43% total-debt-income share as transparent planning assumptions. It then models the price and payment those assumptions support using the inputs on this page.

These are not lender rules, rate quotes, or an approval estimate. Lenders and loan programs set their own underwriting requirements and review factors beyond this calculation.

Planning assumptions

The calculator applies a 28% housing share and a 43% total-debt share to gross monthly income. These values are a consistent budgeting scenario, not a statement that a particular loan program will use, accept, or reject them.

True Cost of Homeownership

  • PITI: Principal + Interest + Taxes + Insurance
  • PMI: ~0.7-1.5%/year if down payment under 20%
  • HOA fees: $0-600+/month depending on community
  • Maintenance: Budget 1-2% of home value per year
  • Closing costs: 2-5% of loan amount (upfront)

Down Payment Options

  • 20%+: No PMI, best rates, lowest monthly payment
  • 10-19%: PMI required, good loan options
  • 3.5-9.9%: FHA loans (3.5% min), conventional (3% min)
  • 0%: VA loans (veterans) and USDA (rural areas)

Related Guides

Related Data

Compare mortgage lenders and approval rates at CFPB HMDA. See property tax rates by county at Census property data. Check rental markets as a fallback at HUD Fair Market Rents.

Disclaimer: Affordability depends on your full financial picture, credit score, and lender. Get pre-approved to know your actual budget.

After you see the price range

What to do with the numbers

  • Treat the price this calculator supports as a ceiling, not a target - the 28%/43% shares are a planning scenario, not the payment that leaves you comfortable month to month.
  • Add PMI, HOA and 1-2% annual maintenance from the true-cost list above before comparing this estimate against a listing price - the sticker price is not the full monthly cost.
  • If your down payment is below 20%, re-check the estimate with PMI factored in - it can add $100-300+/month that the base affordability number does not show.
  • Get pre-approved before house hunting; a lender's actual number, based on your credit and full debts, is the figure to shop with, not this planning estimate alone.

Methodology & Assumptions

This payment tool rearranges principal, rate, and term with closed-form amortization on the figures you enter. Escrow, PMI, and tax lines stay outside unless you model them as separate inputs below.

Inputs, defaults, and authoritative sources
Input Default Source / authority
Principal, rate, term Domain-typical mortgage defaults Published amortization identity

How this amortization node runs

Payment schedules rearrange principal, rate, and term with closed-form amortization. Escrow and PMI stay outside the payment identity unless you enter them as separate inputs. Published domain formulas govern the identities; when an agency updates rates or thresholds we refresh defaults and the page lastmod.

Frequently Asked Questions

How much house can I afford?
This calculator uses transparent planning assumptions: 28% of gross income for housing costs and 43% for total recurring debt. It is a budget-planning estimate, not a lender offer or approval prediction. A lender may use different requirements and will assess more than the inputs here.
What is PMI and when is it required?
Private Mortgage Insurance (PMI) is required when your down payment is less than 20% on a conventional loan. Cost: 0.5-1.5% of the loan amount per year, added to monthly payments. You can request PMI removal when your equity reaches 20% (by paying down principal or home appreciation).
How does my credit score affect my mortgage rate?
Your credit score significantly affects your mortgage rate. With a 760+ score, you'll get the best rates. A 640 score might add 1-2% to your rate. On a $350,000 loan at 30 years, a 1% rate difference costs about $70,000 more in total interest. Improving your score before applying can save thousands.
Should I get pre-approved before house hunting?
Yes. Pre-approval shows sellers you're serious and gives you a firm budget. It requires a hard credit pull and full income documentation. Pre-qualification is a softer estimate without verification. Most sellers and agents won't take offers seriously without a pre-approval letter.

This page identifies the inputs, method, and limitations behind its estimates. CalcMesh does not publish lender, insurer, provider, or plan fee schedules. Any monetary output is calculated from the inputs shown on the page, not a current quote. Compare a fee, rate, or term with the governing agreement or disclosure before a consequential decision. Calculator outputs are not professional advice. Amortization schedules here rearrange the principal, rate, and term you enter—no lender quote is embedded. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.

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