How to use the debt to income calculator
- Enter your gross monthly income before taxes and any payroll deductions.
- Add your monthly housing payment, including mortgage or rent, property taxes, homeowners insurance and HOA dues.
- Sum all other monthly debt obligations such as auto loans, student loans, credit card minimums and personal loans.
- Adjust the threshold percentages if your lender uses different limits than the conventional 28/36 rule.
- Review your front-end and back-end ratios along with the status indicators to see where you stand.
How the debt to income ratio is calculated
The debt to income ratio (DTI) is expressed as a percentage. Lenders look at two separate figures.
The front-end ratio considers only housing costs:
Front-end DTI = Monthly housing payment / Gross monthly income x 100
The back-end ratio includes every recurring debt obligation:
Back-end DTI = (Housing + Other debts) / Gross monthly income x 100
For example, if your gross income is $6,000, your housing costs are $1,500 and your other debts total $500, the front-end ratio is 1,500 / 6,000 x 100 = 25% and the back-end ratio is 2,000 / 6,000 x 100 = 33.33%. Both numbers fall under the conventional 28/36 guidelines, meaning a typical lender would view this profile favorably.
Standard DTI thresholds by loan type
Different loan programs set different maximum ratios. The table below shows commonly cited guideline values for US loan programs. They are not current law, lenders add their own limits, and programs change over time, so confirm with your lender or the program handbook (HUD, VA, USDA).
| Loan program | Front-end limit | Back-end limit |
|---|---|---|
| Conventional (conforming) | 28% | 36% |
| FHA | 31% | 43% |
| VA | No fixed limit | 41% (flexible) |
| USDA | 29% | 41% |
This debt to income ratio calculator lets you edit the threshold fields so you can match whichever program you are applying for. If your ratios exceed these limits, lenders may require compensating factors like a high credit score or significant cash reserves.
What counts as debt and what does not
A common mistake when using a debt ratio calculator is including expenses that lenders ignore. Only contractual, recurring obligations count toward your DTI.
- Included: mortgage or rent, property taxes, homeowners insurance, HOA fees, auto loans, student loans, credit card minimum payments, personal loans, child support and alimony.
- Excluded: utilities, groceries, gas, subscriptions, entertainment, retirement contributions and voluntary extra payments above the minimum.
Always use the minimum required payment for revolving accounts like credit cards, not the amount you typically pay. Using a higher figure will inflate your back-end ratio unnecessarily.
Improving your DTI before applying
If your ratios are too high, you have two levers: reduce the numerator or increase the denominator.
- Pay down credit card balances to lower minimum payments.
- Avoid taking on new installment loans before applying.
- Refinance existing loans to extend the term and reduce the monthly obligation (though this increases total interest).
- Document additional income sources such as bonuses, overtime or rental income if your lender accepts them.
Once you have optimized your numbers here, you can plan a repayment strategy with a debt payoff calculator or estimate your future housing costs with a mortgage calculator.
DTI versus DSCR
The debt to income ratio measures a borrower's personal capacity to repay. For investment properties, lenders often use the debt service coverage ratio instead, which compares the property's net operating income to its debt service. A DTI focuses on your paycheck; DSCR focuses on the asset's cash flow. Understanding both metrics helps real estate investors prepare for different underwriting standards across residential and commercial lending.
This calculator gives estimates for information only. It is not financial, tax or legal advice.
Method and sources
Worked example: $6,000 gross monthly income, $1,500 housing cost and $500 of other debts. Front-end ratio 25.00%, back-end ratio 33.33%. At a 36% back-end limit the most you could add in other debt payments is $660.00 a month.
Method: front-end = housing / gross income, back-end = (housing + other debts) / gross income, both from monthly figures. The program limits in the table are commonly cited guidelines and are not rules of law; check HUD, VA, USDA or your lender's current overlay. Use gross income, minimum payments, and leave out utilities, groceries and insurance.
Worked examples
| Example | Input | Result |
|---|---|---|
| Conventional loan applicant | Gross monthly income ($): 7500; Monthly housing payment ($): 1800; Other monthly debt payments ($): 600; Front-end threshold (%): 28; Back-end threshold (%): 36 | Front-end ratio (housing): 24.00%; Back-end ratio (total debt): 32.00%; Total monthly debt: $2,400.00; Max housing at threshold: $2,100.00; Max other debt allowed: $900.00 |
| FHA loan applicant | Gross monthly income ($): 5000; Monthly housing payment ($): 1400; Other monthly debt payments ($): 500; Front-end threshold (%): 31; Back-end threshold (%): 43 | Front-end ratio (housing): 28.00%; Back-end ratio (total debt): 38.00%; Total monthly debt: $1,900.00; Max housing at threshold: $1,550.00; Max other debt allowed: $750.00 |
| Renter with student loans | Gross monthly income ($): 4500; Monthly housing payment ($): 1200; Other monthly debt payments ($): 450; Front-end threshold (%): 28; Back-end threshold (%): 36 | Front-end ratio (housing): 26.67%; Back-end ratio (total debt): 36.67%; Total monthly debt: $1,650.00; Max housing at threshold: $1,260.00; Max other debt allowed: $420.00 |
| High earner, low debt | Gross monthly income ($): 15000; Monthly housing payment ($): 3000; Other monthly debt payments ($): 200; Front-end threshold (%): 28; Back-end threshold (%): 36 | Front-end ratio (housing): 20.00%; Back-end ratio (total debt): 21.33%; Total monthly debt: $3,200.00; Max housing at threshold: $4,200.00; Max other debt allowed: $2,400.00 |
FAQ
What is a good debt to income ratio?
Many lenders cite 28% for the front-end ratio and 36% for the back-end ratio as conventional rules of thumb. Some programs allow higher back-end ratios, such as 43%, with compensating factors. Limits vary by lender.
Is DTI based on gross or net income?
Lenders calculate DTI using gross monthly income, which is your earnings before taxes, insurance premiums and retirement contributions are deducted.
Do utility bills count toward my DTI?
No. Utilities, groceries, transportation costs and subscriptions are living expenses, not contractual debt obligations, so they are excluded from the calculation.
What is the difference between front-end and back-end DTI?
The front-end ratio only includes housing-related costs like your mortgage, property tax and insurance. The back-end ratio adds all other recurring debts such as auto loans, student loans and credit card minimums.
Can I get approved with a DTI over 43%?
It depends on the lender and the loan program. Some programs allow higher ratios when you have strong credit, cash reserves or other compensating factors, while others cap it lower. Ask your lender for its limit.
Which income should I enter if I have a variable income?
Lenders typically average two years of documented income. Enter that average divided by 12 as the gross monthly income.