Lenders judge your loan application on one number more than almost any other: your debt-to-income ratio. See yours instantly, find out which lender tier you land in, and learn exactly how much room you have left to qualify.
Your debt-to-income ratio (DTI) is the single most important number a mortgage or loan underwriter looks at after your credit score. It compares the money going out each month on debt with the money coming in, and it tells a lender one thing: can this person comfortably take on another payment? This calculator works out both versions lenders use — front-end and back-end — the instant you type, tells you which approval tier you fall into, and shows exactly how much more monthly debt you could add before crossing the line. Most calculators just hand you a percentage; this one gives you the verdict and the next step.
The percentage updates live as you change any field, so you can immediately see what paying off a credit card or asking for a raise would do to your chances. That is the difference between a number and an answer.
The result then shows your back-end DTI (all debt), your front-end DTI (housing only), a visual split of where your income goes, and a verdict on your approval odds.
For example, if you earn $6,000 a month and your housing plus other debts total $2,200, your back-end DTI is 2,200 ÷ 6,000 = 36.7%. If your housing alone is $1,500, your front-end DTI is 1,500 ÷ 6,000 = 25%.
| Back-end DTI | What it means | Typical outcome |
|---|---|---|
| ≤ 36% | Comfort zone | Strong approval odds, best rates |
| 37–43% | Qualified-mortgage limit | Usually approved with good credit |
| 44–50% | Stretched | Possible via FHA / portfolio lenders with compensating factors |
| > 50% | Over the line | Most lenders decline; reduce debt first |
General industry guidelines for U.S. mortgages; individual lenders, loan types (FHA, VA, conventional) and credit profiles vary. Always confirm with your lender.
Use gross income, not take-home. Lenders qualify you on pre-tax income, so mixing in net pay makes your ratio look worse than it is. Count minimum payments, not balances. A $10,000 card balance with a $200 minimum counts as $200 in DTI, not $10,000. Do not forget debts that will appear on your credit report — co-signed loans and student loans in deferment can still be counted by underwriters. Lower DTI the fast way by paying off small loans entirely (which removes the whole monthly payment) rather than chipping at a big one. Boost income that counts: documented, stable income helps; one-off windfalls usually do not. And remember this is an estimate — your lender's exact calculation, loan program and credit score determine the final decision.
A back-end DTI of 36% or lower is widely considered good and gives you the strongest approval odds and best rates. Up to 43% is acceptable for most qualified mortgages, and some lenders stretch to 50% with strong credit and savings. Below 36% is the comfort zone.
Front-end DTI counts only your housing payment against your income. Back-end DTI counts your housing payment plus all other monthly debts. Lenders focus most on the back-end ratio because it reflects your total obligations, but some loan programs cap the front-end too.
Lenders use gross monthly income — your pay before taxes and deductions — so this calculator does too. Using take-home pay would overstate your ratio and misrepresent how a lender sees you.
Include the minimum monthly payments on your mortgage or rent, credit cards, auto loans, student loans, personal loans, and court-ordered payments like child support. Exclude utilities, insurance paid separately, groceries, taxes and subscriptions, which are expenses rather than debts.
Pay off a small loan entirely to remove its whole monthly payment, avoid taking on new debt before applying, or increase documented income. Paying down a credit card to reduce its minimum payment also helps. Even one fewer payment can move you under a key threshold.
It is possible. FHA loans and some portfolio lenders approve DTIs up to around 50% when you have compensating factors such as a high credit score, significant cash reserves, or a large down payment. Above 50%, most lenders decline, so reducing debt first is usually the better move.