A household earning $10,000 a month before tax reaches $3,600 of total debt at 36%. If existing debts take $900, the arithmetic leaves $2,700 for housing. A $1,200 child-care bill is absent from that ratio, so the household may choose $2,400.
Build affordability from the monthly bill
- Start with take-home cash flow. List reliable net income and the expenses that actually leave your account.
- Choose a comfortable all-in housing limit. Include the full mortgage-related payment, not only principal and interest.
- Reserve money for ownership costs. Maintenance, utilities, repairs and special assessments may not appear in a lender payment.
- Protect savings goals. Emergency reserves, retirement contributions, health costs and near-term goals should survive the purchase.
- Work backward to a price range. Test rates, down payments, taxes and insurance instead of using a single income multiple.
The 28/36 shortcut starts with gross income. On $10,000 a month, 28% is $2,800 for housing and 36% is $3,600 for total debt. The formula does not subtract a $1,200 child-care bill, payroll deductions or a personal savings target. Put those amounts into the household budget before choosing a price.
Debt-to-income ratio: useful, but not the whole answer
Debt-to-income ratio (DTI) compares recurring monthly debt obligations with gross monthly income.
Depending on the calculation and lender, included obligations may cover the proposed housing payment, auto loans, student loans, minimum credit-card payments, support obligations and other debts. Precise treatment varies by program and underwriting method.
You may hear a 28/36 rule: roughly 28% of gross income for housing and 36% for total debt. Treat it only as a planning rule of thumb, not a universal approval standard or a promise of affordability. Some loan decisions allow different ratios based on the whole file; a household can also qualify at a ratio that feels uncomfortable after taxes and non-debt expenses.
What belongs in the monthly housing number?
| Cost | Include in planning? | Notes |
|---|---|---|
| Principal and interest | Yes | Based on loan amount, rate and term. |
| Property taxes | Yes | Can change after sale or reassessment. |
| Homeowners insurance | Yes | Use a property-specific quote; separate hazard policies may apply. |
| Mortgage insurance | When applicable | Conventional PMI and government-program charges are not interchangeable. |
| HOA/condo dues | Yes | Review dues, reserves and potential special assessments. |
| Maintenance and repairs | Yes, outside the mortgage bill | Use the property’s age, condition and systems, not one universal percentage. |
| Utilities | Yes, outside the mortgage bill | Home size, climate and efficiency matter. |
Our PITI and payment guide explains these components in detail.
Worked example: qualification math versus comfort
- Gross monthly income: $10,000
- Take-home income after payroll deductions: $7,400
- Car loan: $450
- Student loan counted for planning: $350
- Credit-card minimums: $100
- Child care: $1,200 (not usually a debt in a basic DTI, but very real to cash flow)
- Retirement and emergency savings goal: $1,000 monthly
If the household tests total debt at 36% of gross income, the arithmetic ceiling is $3,600. Subtracting $900 of existing debts leaves a proposed housing amount of $2,700. But this is not an approval rule.
The household chooses a $2,400 mortgage-related limit after entering the $1,200 child-care bill and a $1,000 monthly savings target. It then keeps a separate line for maintenance and utilities. A preapproval does not see every bill on that list.
Convert a comfortable payment into a home-price range
Once you choose the all-in mortgage-related limit:
- Subtract monthly property taxes.
- Subtract homeowners insurance.
- Subtract HOA dues.
- Subtract estimated mortgage insurance if applicable.
- The remainder is the maximum principal-and-interest payment for this planning scenario.
- Use the rate and term to solve for the matching loan amount, then add the planned down payment.
This relationship is sensitive to rate and local taxes. A lower-tax property may support a different price at the same monthly limit. A larger down payment can reduce the loan but also reduce reserves. Test scenarios in our interactive mortgage calculator before choosing one price.
Worked price-range illustration
That leaves $2,150 for principal and interest. At an illustrative 6.50% fixed rate for 30 years, that payment supports a loan of roughly $340,000. With $60,000 down, the arithmetic price is roughly $400,000 before checking closing costs, appraisal, reserves and loan eligibility.
A different rate quote, property-tax bill, insurance premium or PMI amount changes the price. That is why online “salary to house price” multiples are weak planning tools.
Stress-test affordability before making an offer
- Income test: Could the payment survive a temporary reduction in variable pay or overtime?
- Tax and insurance test: What happens if both increase at renewal or reassessment?
- Repair test: Can you handle a deductible and a major system failure without revolving debt?
- HOA test: Is there room for a dues increase or special assessment?
- Rate test: If shopping an adjustable-rate loan, can the budget handle contractually possible increases?
- Cash test: After the down payment and closing costs, will adequate liquid reserves remain?
- Life test: Do child care, health, transportation, education and retirement goals still work?
Ways to improve affordability without stretching
- Consider a lower purchase price or a property with lower ongoing costs.
- Pay down expensive recurring debt when doing so does not erase reserves.
- Compare lenders using consistent Loan Estimate scenarios.
- Adjust the down payment only after modeling PMI, closing costs and remaining cash.
- Review multiple areas because property taxes, insurance and HOA dues can differ sharply.
- Avoid treating the longest available term as free affordability; check lifetime interest and your likely holding period in the amortization guide.
Frequently asked questions
How many times my salary can I afford?
No single multiple is reliable. Rates, debts, taxes, insurance, down payment, location and household expenses can make the same salary support very different prices.
Does DTI use gross or net income?
Lender DTI calculations generally use qualifying gross income, while a personal affordability budget should also study take-home cash flow after taxes, benefits and savings contributions.
Should I spend the full preapproval amount?
Not necessarily. Preapproval addresses conditional borrowing capacity, not your entire financial life. Choose the price that supports a resilient monthly plan.
How much should I budget for maintenance?
There is no perfect universal percentage. Consider the home’s age, roof, HVAC, plumbing, appliances, exterior, climate and inspection findings. Build both a monthly reserve and accessible emergency cash.
Can future rental income make a house affordable?
Only use income you can document and reasonably sustain. Lender treatment of rental income follows specific rules, while vacancy, repairs and management reduce the cash actually available.
Next steps
Worked examples were recalculated on September 9, 2026. The two CFPB links below were checked the same day.
Financial disclaimer: Educational planning information only, not financial, legal, tax or lending advice, prequalification or approval. Lender rules and household circumstances differ. Verify loan terms and seek qualified advice for major financial decisions.