Debt-to-Income Ratio Calculator
Enter your monthly debt payments and gross income to get your DTI ratio — the number lenders check first. The result shows where you land against the 36% and 43% thresholds that decide mortgage and loan approval, and how much room you have to the "healthy" band.
What DTI Ratio Is Needed for a Mortgage
There is no single pass/fail number, but the practical answer is 43% or lower for most loans, and under 36% for the best approval odds and pricing. Those two figures come from how mortgage underwriting actually works.
- 43% is the regulatory ceiling.The Qualified Mortgage rule caps conforming loans at 43% back-end DTI. Above that, the loan loses its legal safe harbor and most conforming products simply won't underwrite it.
- 36% is the comfort target. Conventional underwriters treat a back-end DTI under 36% — paired with a front-end (housing-only) ratio of 28% or less — as a clean approval. You qualify on rate, not on borderline judgment calls.
- FHA and VA loans bend the rules. FHA can approve DTIs in the high 40s, and sometimes past 50%, when you bring compensating factors like a strong credit score or cash reserves. VA loans weigh residual income alongside DTI, so a higher ratio can still pass.
One subtlety the calculator above doesn't split out: underwriters look at front-end DTI (your proposed housing payment alone) and back-endDTI (housing plus every other debt). This tool computes back-end DTI, the broader number — so when you're testing a mortgage scenario, enter the new house payment in the housing field rather than your current rent.
How to Lower Your DTI Quickly
DTI is a ratio, so you can only move it two ways: shrink the debt payments on top or grow the income underneath. Before a loan application, these are the fastest levers, roughly in order of impact:
- Pay off a credit card to zero. A card minimum is about interest plus 1% of the balance, so clearing a card removes its entire payment from the numerator — a much bigger swing than the same dollars on an installment loan. Targeting small balances first, the debt snowball way, knocks out whole payments fastest.
- Ask about excluding a near-finished loan.Many lenders let you leave out an installment loan with 10 or fewer payments remaining. If you're close, that payment can drop off your DTI entirely.
- Consolidate to a lower combined payment. Rolling several debts into one loan can cut your monthly outflow if the new payment beats the sum it replaces — run it through the debt consolidation calculator first, because stretching the term to get there usually costs more total interest.
- Don't open new credit before you apply. A financed car or a new card adds a payment to the numerator and can move you from approvable to declined overnight.
- Document more income. A 10% raise drops DTI by about 10%. Lenders count W-2 base pay immediately; bonus, commission, and side income usually need a two-year history.
For a full step-by-step on shrinking the debt side, see how to pay off debt fast.
DTI vs. Credit Score: Which Matters More?
They measure two different things, and a lender checks both because neither one answers the whole question. Your credit score is a track record — have you repaid borrowed money reliably in the past? Your DTI is a capacity test — can you afford the payment on what you want to borrow now?
Neither rescues the other. A 780 credit score won't save a 50% DTI application, because the income to cover the new payment simply isn't there. And a pristine 20% DTI won't save a score in the 500s, because the lender doubts you'll pay at all. Both have to clear the bar.
Which one is your binding constraint depends on your profile. Higher earners with thin or short credit files usually clear the score test easily and bump into DTI as the ceiling. Borrowers recovering from past delinquencies usually have manageable DTI but find their score is what holds approval back. Run your number in the calculator above, check your score separately, and fix whichever is closer to the line first — the good news is that paying down revolving balances improves both at once, since it lowers your DTI and your credit utilization in the same move.
Frequently asked questions
What DTI ratio do I need to qualify for a mortgage?
Most conventional lenders want a back-end DTI of 43% or lower, and they reserve their best pricing for borrowers under 36%. The 43% line is the Qualified Mortgage cap set by the Consumer Financial Protection Bureau — conforming loans generally won't underwrite past it. FHA loans can stretch into the high 40s (and occasionally past 50%) with strong compensating factors like a high credit score or large cash reserves, while VA loans use a residual-income test alongside DTI. So there's no single number, but 43% is the wall most borrowers should aim to stay under, and 36% is the target that unlocks the smoothest approval.
Is DTI calculated on gross or net income for a mortgage?
Gross — your income before taxes and deductions. Underwriters calibrate the 36% and 43% thresholds around pre-tax income, so that's what goes in the denominator. Wages and salary count immediately; bonus, commission, and self-employment income usually need a two-year documented history before a lender will average it in. The calculator above uses gross income to match how a lender will run your file.
What debts count toward DTI when applying for a loan?
Lenders include the minimum required payment on every recurring obligation that shows on your credit report or a court order: your proposed housing payment (principal, interest, taxes, and insurance), auto loans and leases, student loan payments, credit card minimums, personal loans, HELOCs, and court-ordered alimony or child support. They exclude living expenses — utilities, groceries, insurance not bundled into a mortgage, subscriptions, and savings contributions are not debt and don't count.
Does my DTI or my credit score matter more for approval?
They answer different questions, and a mortgage underwriter checks both. Credit score measures whether you've repaid debt reliably in the past; DTI measures whether you can afford to take on more debt now. A high score won't rescue a 50% DTI, because the income simply isn't there to cover the new payment — and a low DTI won't rescue a credit score in the 500s, because the lender doubts you'll pay at all. For getting approved at the best rate, both need to clear the bar; DTI tends to be the harder ceiling for higher earners with thin credit, while score is the binding constraint for borrowers with past delinquencies.
What's the fastest way to lower my DTI before applying?
Pay off or pay down revolving balances. A credit card minimum is roughly interest plus about 1% of the balance, so clearing a card to zero removes its entire payment from the numerator — a far bigger DTI swing than the same dollars applied to an installment loan, where the scheduled payment doesn't move until the loan is gone. Other fast levers: avoid opening new credit or financing a car in the months before you apply, ask a lender about paying off a short-term installment loan with 10 or fewer payments left (some let you exclude it), and document any raise or qualifying side income to grow the denominator.
How accurate is this DTI calculator?
It computes back-end DTI exactly — total monthly debt divided by gross monthly income — which is the number lenders cite most. The judgment call is what you put in: use the actual minimum payments a lender will pull from your credit report, and for a mortgage, include the proposed new housing payment rather than your current rent. Do that and the result will match what an underwriter calculates. The approval bands are guidelines; a specific lender's overlay may be stricter or looser.
Related debt tools
Debt Consolidation Calculator
See whether rolling several payments into one lowers your monthly DTI — and what it costs in total interest.
Debt Snowball Calculator
Clear balances smallest-first to remove payments from your DTI numerator one at a time.
How to Pay Off Debt Fast
The practical playbook for shrinking debt payments before a mortgage or loan application.
Estimates are educational only. Approval thresholds are general guidelines — individual lenders apply their own overlays, and FHA, VA, and non-QM programs use different limits. Use the actual minimum payments from your credit report and your proposed housing payment for a result that matches how an underwriter will run your file.