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Home Affordability Calculator (28/36 Rule)

Find out the maximum home purchase price and monthly mortgage payment you qualify for based on income, credit debts, and banking debt-to-income (DTI) underwriting standards.

real_estate_agent Standard: Fannie Mae / Freddie Mac DTI
verified 28% Front-End / 36% Back-End Model
lock Zero Data Tracking - 100% Client-Side
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Income & Recurring Monthly Debts

Underwriting Inputs
$
$30,000 $200,000 $400,000
Car loans, student loans, credit card minimums
$ /mo
$
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Mortgage & Underwriting Criteria

%
Maximum Affordable Home Price
Max Monthly Housing (PITI)
P&I, Taxes & Insurance
Max Loan Amount
Plus down

Debt-to-Income (DTI) Qualification

Front-End (Housing)
Back-End (Total Debts)

help Frequently Asked Questions

What is the 28/36 rule for home affordability?

The 28/36 rule is a standard banking metric: your housing costs (PITI mortgage payment, property taxes, home insurance) should not exceed 28% of your gross monthly income (front-end DTI), and total debt obligations (housing plus student loans, car loans, credit cards) should not exceed 36% (back-end DTI).

How does monthly debt affect how much house I can buy?

Lenders evaluate your total Debt-to-Income (DTI) ratio. Every $100 you pay toward a monthly car loan or student loan reduces the maximum mortgage payment you qualify for by approximately $100, which lowers your buying power by $15,000–$20,000 in home price.

How much cash down payment do I really need?

While 20% down eliminates Private Mortgage Insurance (PMI), many conventional loans permit down payments as low as 3% to 5%, and FHA loans require 3.5%. VA and USDA loans offer 0% down for eligible borrowers.

What hidden costs should first-time homebuyers budget for?

Beyond down payment and monthly mortgage, budget 2%–5% of the loan amount for closing costs (loan origination, appraisal, title insurance), plus an ongoing 1%–2% of home value annually for maintenance and repairs.