Home Affordability Calculator
Car, student loans, etc.
Range: 10 - 30
Annual rate
Annual rate
Maximum Home Price
$359,267.94
16.7% down payment
Maximum Loan Amount
$299,267.94
30-year mortgage
Total Monthly Payment
$2,500.00
Principal & Interest
$1,991.04
Property Tax
$359.27
Insurance
$149.69
Income & Debt Analysis
Home Price by Down Payment
| Down Payment | Home Price | Loan Amount | Monthly Payment |
|---|---|---|---|
| $20,000.00 | $326,290.10 | $306,290.10 | $2,500.00 |
| $40,000.00 | $342,779.02 | $302,779.02 | $2,500.00 |
| $60,000.00 | $359,267.94 | $299,267.94 | $2,500.00 |
| $80,000.00 | $375,756.86 | $295,756.86 | $2,500.00 |
| $100,000.00 | $392,245.78 | $292,245.78 | $2,500.00 |
Understanding DTI Ratios
- 28% (Conservative): Traditional guideline for housing costs only
- 36% (Standard): Common maximum for total debt including housing
- 43% (Maximum): Highest ratio typically allowed for qualified mortgages
About the Home Affordability Calculator
The Home Affordability Calculator estimates the maximum home price you can comfortably purchase based on your income, existing debts, down payment, and prevailing mortgage rates. Rather than guessing, it works backward from lender guidelines to translate your monthly budget into a realistic purchase price and a target loan amount. It is the natural first step before getting pre-approved, helping you shop in a price range that won't strain your finances.
Affordability is driven primarily by two debt-to-income (DTI) ratios that lenders use to qualify borrowers. The front-end ratio caps your housing payment (principal, interest, property taxes, homeowners insurance, and any HOA dues) at roughly 28 percent of gross monthly income, while the back-end ratio limits total debt payments to about 36 to 43 percent. The calculator applies these thresholds along with your interest rate and loan term to size a monthly payment, then converts that payment into a maximum mortgage and home price.
Use it to test how different variables move your buying power: a larger down payment lowers the loan and avoids private mortgage insurance, a higher credit score earns a better rate, and paying down a car loan or credit card frees up room under the back-end ratio. It pairs well with a Mortgage Calculator for the full payment breakdown once you settle on a price, and a Loan Calculator for the auto or student debt you may want to clear first.
A practical tip is to budget below your theoretical maximum so you retain savings for closing costs, maintenance, and emergencies; lenders qualify you for a ceiling, not a comfortable number. Also account for property taxes and insurance, which vary widely by location and can add hundreds of dollars to a payment that looks affordable on principal and interest alone.
Frequently asked questions
- What is the 28/36 rule?
- It is a common lending guideline: keep your housing payment at or below 28 percent of gross monthly income (front-end ratio) and total debt payments at or below 36 percent (back-end ratio). Some loan programs stretch the back-end ratio to 43 percent or higher.
- Does a bigger down payment let me afford more house?
- Yes. A larger down payment reduces the loan amount and monthly payment, and reaching 20 percent down eliminates private mortgage insurance, both of which increase the home price you can afford within the same monthly budget.
- Why does the calculator ask about my other debts?
- Car loans, student loans, and credit card minimums count toward your back-end debt-to-income ratio. Higher existing debt reduces how much of your income can go toward a mortgage, lowering your affordable price.
- Should I buy at the maximum the calculator shows?
- Generally no. The maximum is a lender ceiling, not a comfort level. Buying below it preserves cash for closing costs, repairs, furnishing, and unexpected expenses, and lowers the risk of becoming house-poor.
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