Debt-to-Income Ratio for a Mortgage
Your debt-to-income ratio is the number a lender uses to decide how much mortgage you qualify for. Enter your income, housing payment, and monthly debts below to see your DTI and whether it clears the limit for a conventional, FHA, or VA loan.
Your Monthly Numbers
Pre-tax pay, all borrowers combined
Principal, interest, taxes, insurance, HOA, PMI
Car, student, credit-card minimums, support
Front-End DTI
28.7%
Housing payment only
Back-End DTI
37.8%
Housing plus all other debts
Where You Stand by Loan Type
Measured against your 37.8% back-end DTI.
| Loan type | Standard limit | Stretch limit | Your status |
|---|---|---|---|
| Conventional | 36% | 45% | Possible with compensating factors |
| FHA | 43% | 50% | Qualifies |
| VA | 41% | — | Qualifies |
Guidelines, not guarantees. VA uses a residual-income test rather than a hard cap, so 41% is a benchmark — strong residual income can clear a higher ratio. Every lender adds its own overlays.
Turn Your DTI Into a Home Price
Know your housing budget instead of guessing at the payment above.
Front-End vs. Back-End DTI
Mortgage lenders track two ratios. Front-end DTI is your proposed housing payment — principal, interest, property taxes, homeowners insurance, plus HOA dues and PMI where they apply — divided by your gross monthly income. It answers a single question: can you carry the house itself?
Back-end DTI takes that same housing payment and adds every other recurring debt on top — car loans, student loans, credit-card minimums, personal loans, and any court-ordered support — before dividing by the same income. This is the number underwriters lean on, because it captures your whole obligation, not just the mortgage.
The shorthand is the 28/36 rule: keep housing at or below 28% of gross income and total debt at or below 36%. Hit both and you are comfortably inside conventional guidelines. Miss the back-end target and the loan can still work, but you move into the territory where the loan type — and your compensating factors — start to matter.
How to Calculate Your DTI
Grab a recent pay stub and a list of your fixed monthly payments, then work through four steps:
- Find gross monthly income. Pre-tax pay. A $96,000 salary is $8,000 a month. Combine all borrowers on the loan.
- Add up minimum debt payments. Auto, student loans (use 0.5%–1% of the balance if deferred), credit-card minimums, personal loans, alimony, child support.
- Add the proposed housing payment. Principal + interest + taxes + insurance + HOA + PMI — the new payment, not your current rent.
- Divide and convert. Total monthly debts ÷ gross monthly income × 100.
Worked example: $8,000 gross income, a $450 car payment, $200 student loan, and $75 credit-card minimum ($725 in debts), plus a $2,300 housing payment. Total obligations are $3,025, so back-end DTI is $3,025 ÷ $8,000 = 37.8%. Front-end DTI is $2,300 ÷ $8,000 = 28.75%. That file clears FHA and VA comfortably and sits just past the conventional 36% sweet spot — approvable, but a little more house or a little less debt would sharpen the rate.
DTI Limits by Loan Type
Each program draws its qualifying line in a different place. The “standard” column is what automated underwriting approves without a second look; the “stretch” column is how far the program goes when you bring compensating factors like cash reserves, a high credit score, or a low loan-to-value.
| Loan type | Front-end target | Standard back-end | Stretch back-end |
|---|---|---|---|
| Conventional | 28% | 36% | 45% (up to 50% with strong factors) |
| FHA | 31% | 43% | 50%+ with compensating factors |
| VA | — | 41% benchmark | Higher if residual income passes |
Conventional loans (Fannie Mae and Freddie Mac) start from the 28/36 rule but let automated underwriting approve up to 45%, and to 50% when reserves and credit are strong. FHAloans are the most flexible on DTI, qualifying many borrowers into the high-40s. VA loans skip the hard cap: the 41% figure is a benchmark, and what really matters is residual income — the cash left in your budget each month after the mortgage and major bills — so a veteran with plenty of leftover income can clear a higher ratio.
One caveat on every row: these are program guidelines, and individual lenders layer their own stricter rules — called overlays — on top. A lender that caps FHA at 45% is following its own policy, not FHA's. If one lender says no on DTI, another may still say yes.
How to Lower Your DTI Before You Apply
DTI is a fraction, so you can shrink the top (debt) or grow the bottom (income). Debt-side moves work faster:
- Pay off small revolving balances. A $1,500 card with a $75 minimum drags your DTI more per dollar than a large auto loan. Clearing it erases the whole payment from the ratio at once.
- Don't open new credit for six months. A financed car or couch can add four or five points to your DTI overnight and sink an otherwise solid file — the single most common last-minute deal-killer.
- Refinance or extend a high-payment loan. Stretching a 36-month auto loan to 60 months lowers the monthly figure that hits DTI, even though it costs more interest overall.
- Add a co-borrower. A spouse or family member's income (and debts) on the application can pull a borderline ratio back into range.
- Lower the housing payment. A bigger down payment, a longer term, or a cheaper home all cut the front-end number — and with it the back-end.
If your back-end DTI is above 50%, the honest answer is usually six to twelve months of paydown before reapplying. Pulling a ratio from 52% to 38% in that window typically unlocks a better rate than forcing an FHA approval at a stretched number — and leaves you a payment you can actually live with.
Frequently Asked Questions
What DTI do I need to qualify for a mortgage?
Most conventional loans want a back-end DTI at or below 36%, though automated underwriting routinely approves up to 45% and, with strong compensating factors, higher. FHA loans qualify up to 43% by default and can stretch toward 50% with reserves or a high credit score. VA loans use a 41% benchmark alongside a residual-income test, so a higher ratio can still pass if you have enough money left over each month. Lower is always cheaper — the best rates go to borrowers under about 36%.
What is the difference between front-end and back-end DTI?
Front-end DTI counts only your future housing payment — principal, interest, property taxes, homeowners insurance, plus HOA dues and PMI — divided by gross monthly income. Back-end DTI adds every other recurring debt: car loans, student loans, credit-card minimums, personal loans, and child support or alimony. Lenders look at both, but the back-end number is the one that usually decides your approval.
How do I calculate my debt-to-income ratio?
Add up your minimum monthly debt payments plus your proposed housing payment, then divide by your gross (pre-tax) monthly income and multiply by 100. For example, $3,025 in total monthly obligations divided by $8,000 in gross income is a 37.8% back-end DTI. Use gross income, not take-home pay, and include the new mortgage payment — not your current rent.
Does DTI use gross or net income?
Gross monthly income — what you earn before taxes, retirement contributions, and insurance premiums come out. Salaried borrowers divide annual salary by 12. Hourly workers use a 12-to-24-month average. Self-employed applicants use the two-year average of net earnings from their tax returns. Bonus and overtime income generally needs a two-year track record to count.
What debts count toward DTI on a mortgage application?
Recurring obligations that show on your credit report or a court order: auto loans and leases, student loans (lenders use the actual payment, or roughly 0.5%–1% of the balance if it is deferred or shows $0), credit-card minimum payments, personal loans, alimony, and child support. Utilities, groceries, insurance premiums, phone bills, and streaming subscriptions are not counted.
How can I lower my DTI before applying for a mortgage?
Pay down revolving balances to erase the monthly minimum, avoid taking on any new loan or credit line for six months before you apply, refinance or extend a high-payment loan to shrink its monthly figure, add a co-borrower's income, or lower the housing payment itself with a larger down payment or a less expensive home. Debt-side fixes work fastest because they cut the top of the ratio immediately.
Can I get a mortgage with a high DTI?
Yes, up to a point. FHA loans are the most forgiving, approving many borrowers into the high-40s and occasionally to 50% when compensating factors — cash reserves, a 700-plus credit score, or a low loan-to-value — offset the risk. But a high DTI usually means a higher rate and a smaller approved loan. Above roughly 50%, most automated underwriting declines the file outright, and a few months of debt paydown is the realistic path.
Keep Going
DTI decides how much you can borrow; these tools turn that into a price and a payment.
- The affordability calculator applies the 28/36 DTI rules to your income and debts and returns a maximum home price with a full PITI breakdown.
- The FHA loan calculator prices the low-down-payment option that stretches furthest on DTI, including its mortgage insurance.
- The PMI calculator and closing costs calculator fill in the other pieces of the payment and the cash you need at the table.
- For a plain-English primer on the number itself, see how to calculate your debt-to-income ratio.