Debt-to-Income Ratio Calculator
Calculate your debt-to-income (DTI) ratio, both front-end and back-end, and see whether it meets common mortgage limits and how much debt you could add or need to cut
Last updated: November 9, 2026
How to Use the Debt-to-Income Ratio Calculator
How to use the debt-to-income ratio calculator
- Enter your gross income. Use your pay before taxes, and choose whether you typed a monthly or yearly figure. Include steady extra income such as bonuses, rental income or a co-borrower's pay.
- Add your housing payment. Enter your rent, or the full monthly mortgage cost with property tax, insurance and HOA dues.
- Fill in your other debts. Add car, student loan, credit card and other required payments. For credit cards, use the minimum payment due, not the amount you usually pay.
- Read your ratios. The calculator shows your back-end DTI, your front-end ratio, and how much more debt you could add before reaching 36% or 43%. If you are above 36%, it shows how much monthly debt to pay off, or how much income you would need.
- Check the lender table. See how your numbers compare with common conventional, FHA, VA and USDA guidelines.
Lenders set their own rules, so treat these limits as general guidance rather than a promise of approval.
Formula & Methodology
How to calculate debt-to-income ratio
Your debt-to-income ratio (DTI) compares what you owe each month with what you earn before tax:
DTI = (Total monthly debt payments ÷ Gross monthly income) × 100
Example: you earn $6,000 a month before tax. Your monthly payments are rent or mortgage $1,500, car loan $400, student loan $300 and credit card minimums $150. That is $2,350 in total.
DTI = 2,350 ÷ 6,000 × 100 = 39.2%
Front-end and back-end DTI
Lenders look at two versions of the ratio:
- Front-end ratio (housing ratio): housing costs only ÷ gross income. In the example, 1,500 ÷ 6,000 = 25%.
- Back-end ratio (total debt ratio): housing plus all other monthly debt ÷ gross income. In the example, that is 39.2%.
The classic 28/36 rule says housing should stay under 28% of gross income and total debt under 36%. Many lenders go higher: FHA loans often allow 31% and 43%, and some conventional loans accept a back-end ratio up to 45% or more with strong credit.
What counts as debt
Included: rent or mortgage payments (with property tax, insurance and HOA dues), car loans and leases, student loans, credit card minimum payments, personal loans, child support and alimony.
Not included: utilities, groceries, phone and internet bills, subscriptions, insurance premiums, and income taxes. These are living costs rather than debts, and the ratio is based on income before tax.
Staying at a target ratio
To find how much more debt you can carry, multiply your gross monthly income by the target ratio and subtract what you already pay. With $6,000 of income and a 43% target, the ceiling is $2,580, which leaves $230 of room on top of $2,350.
About Debt-to-Income Ratio Calculator
Our debt-to-income ratio calculator is a free, easy-to-use tool designed to help you calculate your debt-to-income (dti) ratio, both front-end and back-end, and see whether it meets common mortgage limits and how much debt you could add or need to cut. For professionals or those who need quick calculations, our calculator provides accurate results instantly.
Frequently Asked Questions
What is a good debt-to-income ratio?
A back-end DTI of 36% or less is generally considered good, and under 20% is excellent. Between 36% and 43% is manageable for many loans. Above 43% it becomes harder to qualify for a mortgage, and above 50% most lenders will not approve one.
What is the difference between front-end and back-end DTI?
The front-end ratio counts only your housing costs, divided by your gross income. The back-end ratio adds all other monthly debt payments, such as car loans, student loans and credit card minimums. Mortgage lenders review both, and the back-end ratio is usually the stricter test.
How do I calculate my debt-to-income ratio?
Add up your monthly debt payments, divide the total by your gross monthly income (before tax), and multiply by 100. For example, $2,350 of debt on $6,000 of income is 39.2%.
What DTI do I need to get a mortgage?
It depends on the loan. Conventional loans typically want 36% or lower, though many accept up to 45% with strong credit and savings. FHA loans commonly allow up to 43%, VA loans have a 41% guideline, and USDA loans use about 41%. Lenders may go above these with compensating factors.
Does rent count in debt-to-income ratio?
For a mortgage application, lenders usually count the new housing payment you will make, not your current rent. Some other lenders, such as landlords or personal loan providers, do count rent. If you are checking readiness to buy, enter the mortgage payment you expect to have.
How can I lower my debt-to-income ratio?
Pay down balances, especially credit cards and small loans, so the monthly payments drop. You can also increase your income, avoid taking on new debt before applying, or refinance a loan to a lower payment. The ratio improves from either side: less debt or more income.
Does DTI affect my credit score?
No. Credit bureaus do not know your income, so DTI is not part of your credit score. Lenders calculate it separately, together with your credit history, when they decide whether to approve a loan and at what rate.
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