Home Affordability Calculator
Estimate the maximum home price that fits your income, debt, and monthly budget constraints.
What this calculator tells you
A how much home can you afford calculator gives you a practical estimate of the maximum home price that may fit your budget. Instead of guessing based on a listing price, it starts with your monthly income and debt obligations, then applies debt-to-income (DTI) limits commonly used in mortgage underwriting.
The estimate includes principal and interest, plus ongoing ownership costs like property tax, homeowners insurance, HOA dues, and PMI when applicable. That makes the number more realistic than a simple mortgage-only estimate.
How affordability is calculated
1) Income-based monthly housing budget
Lenders often check two DTI thresholds:
- Front-end DTI: Housing costs as a percentage of gross monthly income (often around 28%).
- Back-end DTI: Total monthly debt (housing + other debts) as a percentage of gross monthly income (often around 36% to 43%).
The lower of these two limits becomes your estimated maximum monthly housing payment.
2) Converting monthly budget to home price
After finding your monthly housing cap, the calculator works backward to estimate a home price that keeps your total housing costs within that cap. It accounts for:
- Mortgage principal and interest
- Property tax
- Homeowners insurance
- HOA dues
- Private Mortgage Insurance (PMI), if down payment is below 20%
What each input means
Annual household income
Use gross income before taxes. Include stable income sources you can document.
Monthly debt payments
Include minimum required payments for credit cards, auto loans, student loans, personal loans, and other recurring debts.
Down payment
A larger down payment can increase affordability, reduce monthly payment, and potentially eliminate PMI.
Interest rate and loan term
Higher rates reduce purchasing power. Longer terms reduce monthly payments but increase total interest paid over time.
Ways to improve how much home you can afford
- Lower monthly debts: Paying off or refinancing debt can improve back-end DTI.
- Increase down payment: Reduces loan size and may avoid PMI.
- Shop mortgage rates: Even a small rate improvement can materially raise affordability.
- Consider lower-tax areas: Property taxes can significantly affect monthly carrying cost.
- Keep a cushion: Stay below your max to leave room for maintenance, utilities, and life changes.
Important reminders before you buy
This tool is a planning estimate, not a loan approval. Lenders may use different credit score requirements, reserve rules, closing cost assumptions, and DTI thresholds. Before making an offer, speak with a lender for a pre-approval and compare multiple loan scenarios.
Finally, affordability is not just what you can borrow—it is what you can comfortably manage while still meeting savings goals and maintaining financial flexibility.