Home Affordability Calculator

What is Home Affordability?

Home affordability refers to how much house you can comfortably afford based on your income, debts, down payment, and other financial factors. Lenders typically use two key ratios to determine affordability: the front-end ratio (housing costs ÷ gross income) and the back-end ratio (total debt payments ÷ gross income). Most lenders prefer a front-end ratio of 28% or less and a back-end ratio of 36% or less.

Key Factors in Home Affordability

Several factors determine how much house you can afford:

• Gross Income: Your total income before taxes and deductions
• Down Payment: Typically 3-20% of home price; 20% avoids PMI
• Monthly Debts: Car loans, student loans, credit cards, other obligations
• Interest Rate: Current mortgage rates affect monthly payments significantly
• Property Taxes: Vary by location, typically 1-2% of home value annually
• Home Insurance: Required by lenders, varies by home value and location
• HOA Fees: Monthly fees for condos and planned communities
• Credit Score: Affects interest rates and loan approval

Understanding DTI Ratios

Debt-to-Income (DTI) ratio is a key metric lenders use:

• Front-End DTI (28% Rule): Mortgage payment (PITI) ÷ Gross monthly income ≤ 28%
• Back-End DTI (36% Rule): All monthly debts ÷ Gross monthly income ≤ 36%
• Qualified Mortgage Limit: Most lenders allow up to 43% DTI
• Preferred Range: 36% or lower for best loan terms
• Example: $85k income = $7,083/month gross; 28% = $1,983 max housing payment

The 28/36 Rule Explained

The 28/36 rule is a traditional guideline for home affordability:

• 28% for Housing: Your total housing costs (mortgage, taxes, insurance, HOA) should not exceed 28% of gross monthly income
• 36% for Total Debt: All debt payments (housing + car + student loans + credit cards) should not exceed 36% of gross monthly income
• Why it matters: Following this rule helps ensure you can comfortably afford your home while maintaining other financial obligations

How to Increase Your Affordability

Strategies to increase how much house you can afford:

• Save for larger down payment: Reduces loan amount and monthly payment
• Pay down debts: Lower DTI ratio increases borrowing power
• Improve credit score: Better rates save thousands over loan term
• Increase income: Side hustles or career advancement boost affordability
• Consider longer loan term: 30-year loans have lower payments than 15-year
• Look in affordable areas: Location significantly impacts home prices
• First-time buyer programs: Many programs offer down payment assistance

Using This Calculator

Follow these steps to determine your home affordability:

• Step 1: Enter your annual gross income
• Step 2: Enter your down payment amount and percentage
• Step 3: Enter all monthly debt payments
• Step 4: Enter current interest rate and loan term
• Step 5: Enter property tax rate, insurance, and HOA fees
• Step 6: Review your maximum home price and affordability ranges
• Step 7: Check your DTI ratio and monthly payment breakdown