How to use this calculator
Three numbers drive the estimate. Add the optional assumptions if you want a tighter answer.
- Annual income. Use gross pre-tax pay. If you are buying with a partner, combine both incomes.
- Monthly debts. Total the minimum payments on car loans, student loans, and credit cards. Leave out utilities and groceries.
- Down payment. The cash you plan to put toward the purchase. Below 20% adds PMI to the estimate.
- Advanced settings. Adjust the rate, DTI cap, property tax, insurance, and HOA to match your market.
Results update as you type. The housing-cost bar shows how much of your gross income the payment uses, so you can see whether the number is comfortable or stretched.
What determines how much house you can afford?
Lenders measure your debt-to-income ratio: the share of gross monthly income committed to debt payments, including the proposed mortgage. Conventional loans often cap total DTI near 36%, though stronger files can reach 43% or higher. The lower your other debts, the more of that allowance goes to housing.
The housing payment itself is more than principal and interest. Property tax typically runs 0.5% to 2.5% of value per year, homeowners insurance adds another slice, PMI applies below 20% down, and HOA dues can be significant. All of it competes for the same monthly budget.
The rate compounds the effect. At 6%, a $300,000 loan costs about $1,799 a month; at 8%, it costs about $2,201. That extra $400 does not just raise the payment, it lowers the price you can afford for the same budget.
Tips to increase your budget
- Pay down debts first - Clearing a $300 car payment frees that amount for housing and can add tens of thousands to your price range.
- Save a larger down payment - Reaching 20% removes PMI and increases purchasing power at the same monthly cost.
- Improve your credit score - Better scores bring lower rates, and a lower rate stretches the same payment across a bigger loan.
- Consider a longer term - A 30-year loan lowers the monthly payment compared with 15 years, raising the affordable price, though total interest grows.
- Shop taxes and insurance - Rates vary by location and provider. A cheaper quote or a lower-tax area puts more of your budget toward the mortgage itself.
Frequently asked questions
How is the affordable home price calculated?
The calculator starts with your gross monthly income, applies the DTI cap you choose, and subtracts your existing debts. What remains is the housing budget. It then solves for the price where principal, interest, property tax, insurance, PMI, and HOA all fit inside that budget.
What is the 28/36 rule?
It is a common lending guideline: housing costs at or below 28% of gross income, and all debt payments at or below 36%. Many conventional loans allow a higher total DTI, sometimes up to 43% or more, but staying near the guideline leaves room for savings and emergencies.
How does my down payment affect affordability?
A larger down payment shrinks the loan, removes PMI once you reach 20%, and lowers the monthly payment. That means the same housing budget supports a higher purchase price. Cash also covers closing costs, so keep a reserve rather than putting every dollar into the down payment.
Do my monthly debts really change how much house I can afford?
Yes, directly. Lenders include car loans, student loans, and minimum card payments in your DTI, so those dollars cannot also go to housing. Paying off a $300 monthly debt can add tens of thousands to your affordable price, depending on the rate.
How much does the interest rate matter?
A lot. On a $300,000 loan, a 6% rate costs about $1,799 per month, while 8% costs about $2,201. That $400 difference is roughly $144,000 over 30 years, and it lowers the price you can afford for the same monthly budget. Even an eighth of a point is worth negotiating.
What is included in the monthly housing cost?
Principal and interest on the loan, property tax, homeowners insurance, mortgage insurance if your down payment is below 20%, and any HOA dues. Utilities, maintenance, and repairs are separate, so budget roughly 1% of the home value each year for upkeep.
This calculator is an estimate for planning only. Actual approval depends on credit, reserves, employment history, the appraisal, and lender guidelines. Confirm your numbers with a loan officer before making an offer.
