Estimate using the 28/36 rule: housing costs at most 28% of gross income and total debts at most 36%. Lenders use their own rules. This is not financial advice.
How to use this calculator
Enter your income, your other monthly debts, the down payment you have and the mortgage rate. Press Calculate to see the home price that fits the 28/36 rule, with property tax and insurance included.
The formula
Housing budget = the smaller of 28% of monthly income and 36% of monthly income minus other debts
Price = loan + down payment, where the loan payment plus tax and insurance equals the budget
Example: With a $100,000 income, $500 of other debts, $60,000 down, a 6.5% 30-year loan, 1.1% property tax and $1,200 insurance, the budget is $2,333 a month and the home price is about $361,000.
What your home affordability estimate means
The calculator sets a monthly housing budget using the 28/36 rule, then works backward to the loan and home price that fit that budget. The housing budget covers principal, interest, property tax and insurance. Your maximum home price is that loan plus your down payment. Treat it as a ceiling, not a target.
A worked example
With $100,000 in gross yearly income, monthly income is about $8,333. Twenty-eight percent of that is about $2,333. The 36% limit is $3,000, minus $500 of other debts, or $2,500. The tool uses the lower figure, $2,333. With a $60,000 down payment, a 6.5% 30-year rate, 1.1% property tax and $1,200 a year for insurance, the estimated home price is about $361,000.
What changes the result
- Mortgage rate. A higher rate means more of each payment goes to interest, so the loan you can carry shrinks.
- Other debts. Car loans, student loans and card minimums count against the 36% limit. Paying one off can raise your budget.
- Down payment. Each extra dollar down adds directly to the price you can reach.
- Loan term. A 15-year loan has higher monthly payments, so it lowers the maximum price, though you pay much less interest overall.
- Property tax and insurance. Rates vary widely by area. High-tax areas take a big share of the budget.
Common mistakes
- Using take-home pay instead of gross income. The 28/36 rule is based on gross income.
- Ignoring HOA dues and mortgage insurance. If you put down less than 20%, many loans add a monthly insurance cost.
- Spending all your savings on the down payment. Keep money for closing costs, moving and repairs.
- Assuming the maximum is comfortable. Childcare, commuting and retirement saving are not in the formula.
Planning tips
Try a few scenarios, such as a rate one point higher or a smaller down payment, to see how much room you have. Budget about 1% of the home’s value each year for upkeep. Get pre-approved before you shop seriously, since lenders apply their own limits. This tool is educational and is not financial advice. A financial advisor or loan officer can review your full situation.

