Your debt-to-income ratio (DTI) is the percentage of your gross monthly income that goes toward debt payments. Lenders treat it as a headline number: a good credit score with a bad DTI still gets a "no," while a solid DTI can keep your application alive even with an average score. This free calculator gives you both ratios lenders actually check — the front-end ratio (housing cost only) and the back-end ratio (all minimum debt payments).
The classic benchmark is the 28/36 rule: no more than 28% of gross income on housing, and no more than 36% on total debt. Most conventional mortgages require a back-end DTI of 45% or less, and the federal "qualified mortgage" standard caps it at 43%. Auto lenders are more flexible, but a DTI above 50% usually means higher rates or a denial. Knowing your number before you apply lets you pay down the right debts first instead of guessing.
Our calculator divides your monthly debt payments by your gross (pre-tax) monthly income, exactly the way underwriters do. Only recurring debt payments count — credit card minimums, car and student loans, mortgage or rent, personal loans, and child support. Day-to-day expenses like groceries, utilities, insurance, and taxes are not debts, so leave them out.
How to use the DTI Calculator
- Enter your gross monthly income — the total before taxes. If you are paid annually, divide by 12.
- Add your housing payment — rent, or mortgage principal plus interest.
- Add your other debt payments: car loan, student loans, credit card minimums, and any other recurring debts.
- Click Calculate DTI to see your front-end and back-end ratios plus a verdict on how lenders will read them.
- Test improvements: lower a payment or raise income and recalculate to see how fast your ratio — and your borrowing power — changes.
Tips for accurate results
- Use gross income (before tax), not take-home pay — lenders do the same.
- For credit cards, enter the minimum monthly payment, not the statement balance.
- Under 36% back-end DTI is healthy; 36–43% is workable; over 43% restricts most mortgages.
- Paying off a small balance in full can cut your ratio faster than chipping at a large one.
How to lower your debt-to-income ratio
You have two levers: raise income or cut debt payments. On the income side, a raise, overtime, or side income all help — lenders count stable, documented income. On the debt side, paying off a loan entirely removes its payment from the ratio, which is why eliminating a $200/month car payment often helps more than paying $5,000 off a mortgage. Refinancing high-interest debt into a lower monthly payment also moves the needle. Avoid opening new credit before a loan application: it adds payments before it adds history.
Frequently asked questions
What is a good debt-to-income ratio?
Most mortgage lenders want a back-end DTI of 43% or less, and the 28/36 rule (no more than 28% of income on housing, 36% on all debt) is a classic benchmark. Below 36% is generally considered healthy, while above 43% makes qualifying for new loans difficult.
Which debts count in the debt-to-income ratio?
Minimum credit card payments, car loans, student loans, mortgage or rent, and any other recurring debt payments count. Utilities, groceries, taxes, insurance premiums, and subscriptions are not debts and are excluded from the DTI calculation.
What is the difference between front-end and back-end DTI?
Front-end DTI is your housing cost divided by gross monthly income. Back-end DTI adds all other minimum debt payments to the housing cost, then divides by gross income. Lenders check both, but back-end DTI is the main qualification test.
Does debt-to-income ratio affect my credit score?
DTI is not a direct input to your credit score, but it matters to lenders when you apply for credit. Your credit score reflects how you handle debt; DTI reflects how much of your income is already committed. Both are used together in lending decisions.