Debt-to-Income Calculator
Find the front-end and back-end DTI ratios lenders use to approve your mortgage.
A debt-to-income calculator shows the share of your gross monthly income that goes to debt. Enter your income, housing payment, and other monthly debts to see your front-end ratio for housing and your back-end ratio for all debt. On $7,500 a month with $1,800 housing and $600 other debt, your back-end DTI is 32%.
Debt-to-Income Ratio Calculator
Load a preset to start, then edit any field with your own numbers.
Household income before taxes, not take-home pay.
Mortgage payment including taxes, insurance, HOA, and PMI. For rent, use your rent.
Car, student, and personal loans plus minimum card payments and support. Not utilities or groceries.
Advanced settings: itemize your debts
Fill these in to add them up automatically. They replace the single debts field above when any are entered.
Please enter a gross monthly income greater than zero.
Your back-end DTI, all debt as a share of income
Front-end DTI = housing payment ÷ gross income
Back-end DTI = (housing + all other debt) ÷ gross income
Both use gross monthly income, the amount before taxes. Lenders weigh the back-end ratio most.
Show calculation breakdown
Back-End DTI
Your Ratios vs Lender Limits
Smart Insights
Your personalized breakdown will appear here.
What Is a Debt-to-Income Calculator?
A debt-to-income calculator measures how much of your income is already spoken for by debt. It is the single number lenders lean on hardest when they decide whether to approve a mortgage, often more than your credit score.
There are two versions. The front-end ratio looks at housing alone. The back-end ratio looks at all your debt together. Both are shares of your gross monthly income, the amount before taxes.
Who Uses a DTI Calculator
- Mortgage applicants checking whether they meet lender limits before applying.
- Buyers planning ahead who want to lower their DTI before shopping.
- Anyone managing debt who wants a clear read on their financial cushion.
Your DTI also sets how much house you can afford. To turn it into a maximum price, use the mortgage affordability calculator.
How the DTI Calculator Works
You give the tool three numbers and it returns both ratios along with how they compare to lender limits.
- Enter gross monthly income. Use household income before taxes.
- Enter your housing payment. Include taxes, insurance, HOA, and PMI, or use your rent.
- Enter other monthly debts. Add car, student, and card payments. You can itemize them in Advanced settings.
The results show your back-end DTI first, since that is the number lenders weigh most. Below it sit your front-end ratio, your comfort level, and how much monthly debt room you have before hitting the common 36% and 43% limits.
What Counts as Debt
Only recurring debt payments count: mortgage or rent, car loans, student loans, minimum card payments, and support payments. Utilities, groceries, insurance you pay directly, and subscriptions do not.
What DTI Do Lenders Want?
Most lenders follow the 28/36 guideline, with room to stretch for strong borrowers. Here is how the common thresholds break down.
| Back-End DTI | What It Signals | Typical Outcome |
|---|---|---|
| Under 36% | Comfortable debt load | Strong approval odds |
| 36% to 43% | Manageable but watched | Often approved with good credit |
| 43% to 50% | Stretched | Possible with compensating factors |
| Over 50% | High risk | Usually declined |
The 43% mark is a common ceiling for many qualified mortgages, though some programs allow higher with strong credit and reserves. The front-end housing ratio ideally stays under 28%.
How to Lower Your Debt-to-Income Ratio
DTI has two levers: the debt on top and the income on the bottom. You can push on either.
- Pay down a loan. Clearing a car loan or card removes its full payment from the ratio.
- Avoid new debt before applying. A new car loan right before a mortgage can sink your approval.
- Raise documented income. A raise, bonus, or documented side income lowers every ratio.
- Choose a smaller housing payment. A larger down payment or a cheaper home cuts the front-end ratio.
Paying off the mortgage faster does not change your current DTI, but clearing other debts does, and a smaller housing payment lowers the front-end side. Run different housing payments through the mortgage calculator to see the effect on your ratio.
The Fastest Lever
Retiring a single installment loan usually moves DTI more than any other quick action, because it removes the whole payment at once. Target the loan with the highest payment relative to its remaining balance.
DTI vs Credit Score
These two numbers measure different things and both matter for a mortgage. Your credit score reflects how reliably you repay. Your DTI reflects how much room your income has for a new payment.
A high score with a high DTI can still be declined, because the income simply does not stretch far enough. A modest score with a low DTI can be approved, because the payment is clearly affordable.
How They Work Together
Lenders read them side by side. A strong score can justify a higher DTI, and a low DTI can offset a weaker score. Your down payment plays into this too; see how it changes your loan in the down payment calculator.
Common DTI Mistakes
Using Net Income
DTI uses gross income, before taxes. Using take-home pay makes your ratio look worse than lenders see it.
Leaving Out the Full Housing Payment
Front-end DTI uses the full payment with taxes and insurance, not just principal and interest. Include escrow.
Counting the Wrong Bills
Utilities, groceries, and subscriptions are not debt. Only loan and card payments count. Adding the wrong items inflates your ratio.
Taking On Debt Mid-Application
A new loan between pre-approval and closing can change your DTI and cost you the loan. Hold off on big purchases until you close.
Debt-to-Income FAQs
What is a good debt-to-income ratio?
Under 36% is comfortable for most lenders. Many approve up to 43%, and some programs stretch higher with strong credit and reserves.
What is the difference between front-end and back-end DTI?
Front-end DTI counts only your housing payment against income. Back-end DTI counts all your debt, including housing. Lenders focus on the back-end ratio.
Does DTI use gross or net income?
Gross income, before taxes. Using net income makes your ratio look higher than lenders calculate.
What debts count in DTI?
Mortgage or rent, car loans, student loans, minimum card payments, and support payments. Utilities, groceries, and subscriptions do not count.
How do I lower my DTI quickly?
Pay off an installment loan to remove its whole payment, avoid new debt, or document more income. Clearing a loan usually moves the ratio most.
Can I get a mortgage with high DTI?
Sometimes. Above 43% is harder, but strong credit, a large down payment, and cash reserves can offset it with some lenders.
Is DTI more important than credit score?
Both matter. A high score cannot fix income that does not stretch, and a low DTI can offset a weaker score. Lenders read them together.
Is this DTI calculator free?
Yes. There is no signup and nothing you enter leaves your browser.
Further Reading and Sources
The DTI math here is simple and exact. Use these primary sources to check the rules:
- CFPB on Debt-to-Income explains how the ratio is calculated and used.
- Fannie Mae publishes the DTI limits for conforming loans.
- HUD Buying a Home covers FHA debt ratio guidelines.
Lender overlays and loan programs set their own limits. Confirm the exact thresholds with your lender.
Last updated August 21, 2026. This tool is provided for general informational and planning purposes only. It is not financial advice or a loan decision. Lenders set their own DTI limits and count debts differently. Confirm your figures with a licensed lender before applying.
Creator
Shakeel Muzaffar is the Founder and Editor-in-Chief of MultiCalculators.com, bringing over 15 years of experience in digital publishing, product strategy, and online tool development. He leads the platform's editorial vision, ensuring every calculator meets strict standards for accuracy, usability, and real-world value. Shakeel personally oversees content quality, formula verification workflows, and the platform's commitment to publishing tools that are genuinely useful for students, professionals, and everyday users worldwide.
Areas of Expertise: Editorial Leadership, Digital Publishing, Product Strategy, Online Calculators, Web Standards
