- Your debt-to-income ratio (DTI) = total monthly debt payments ÷ gross monthly income.
- Front-end DTI counts housing only; back-end DTI counts all debts. Lenders care most about back-end.
- Worked example: $6,500 income → 28.5% front-end, 38.7% back-end.
- Key thresholds: 28/36 rule, 43% QM, up to ~57% FHA.
- Lenders count minimum payments, not balances.
- Fastest fixes: eliminate a whole payment, avoid new debt, include all income.
You earn a good salary. Your credit score is decent. Yet the lender says no. The culprit is often debt-to-income ratio.
DTI is the lender’s reality check. This guide shows exactly how it’s calculated, the thresholds that matter, and how to move yours into approval territory.
What DTI Is — and Why Lenders Obsess Over It
DTI = (total monthly debt payments ÷ gross monthly income) × 100. If you pay $2,500/month and earn $6,500, DTI is 38.5%.
Lenders love DTI because it’s forward-looking. DTI measures present capacity, while credit score summarizes past behavior.
Front-End vs Back-End DTI
- Front-end: housing costs only ÷ income.
- Back-end: all debts ÷ income. This is the number that most often decides applications.
How to Calculate Your DTI: Worked Example
Income: $6,500/month. Debts: Housing $1,850, Car $420, Student $180, Cards $65. Total: $2,515.
Front-end: $1,850 ÷ $6,500 = 28.5%. Back-end: $2,515 ÷ $6,500 = 38.7%.
Try our loan eligibility calculator.
What Counts as Debt
Counts: mortgage/rent, car, student, personal loans, card minimums, child support. Doesn’t count: utilities, groceries, subscriptions.
Key: it’s the minimum payment, not the balance. Gross income, not take-home.
Lender DTI Thresholds
- 28/36 rule: classic guideline for conventional mortgages.
- 43%: US Qualified Mortgage ceiling.
- ~57%: FHA maximum with compensating factors.
What Your DTI Range Tells You
| DTI | Meaning | Outcome |
|---|---|---|
| Under 20% | Excellent | Best pricing |
| 20–35% | Healthy | Smooth approvals |
| 36–43% | Caution | Approved, worse pricing |
| 44–50% | Stretched | Fewer options |
| Over 50% | Danger | Most decline |
7 Ways to Lower Your DTI
1. Pay off an entire small debt. Eliminating $180/mo on $6,500 income: 38.7% → 35.9%. Kill whole payments, not balances.
2. Don’t take new debt before applying.
3. Add verifiable income. $500/mo side income: 38.7% → 35.9%.
4. Consolidate debts into one lower payment. See debt consolidation guide.
5. Bigger down payment shrinks the new loan payment.
6. Extend term carefully — lowers payment but raises total interest.
7. Time application after payoffs post (30–60 days).
Common Mistakes
- Using take-home instead of gross income.
- Forgetting debts like card minimums.
- Paying balances not payments.
- Applying before payoffs post.
Action Plan
- List all monthly debt payments.
- Total gross monthly income.
- Compute both ratios.
- Compare to thresholds.
- Eliminate smallest payment entirely.
- Model new loan in EMI calculator.
If DTI Blocks You
- Borrow less.
- Add co-borrower.
- FHA programs tolerate higher DTI.
- Wait and repair.
Frequently Asked Questions
What is a good DTI?
Under 36% back-end is good; under 20% excellent. Over 50% most lenders decline.
How do I calculate DTI?
Total monthly debt payments ÷ gross monthly income × 100.
Front-end vs back-end DTI?
Front-end = housing only. Back-end = all debts. Classic guideline: 28/36.
Gross or net income?
Gross — before taxes. Include all verifiable income.
What counts as debt?
Minimum monthly obligations: mortgage, car, student, cards, etc. Not utilities.
What is the 28/36 rule?
Guideline: ≤28% housing, ≤36% total DTI.
Maximum DTI for mortgage?
43% QM ceiling; up to ~57% FHA.
Can I get a loan with high DTI?
Sometimes, but options narrow and rates worsen.
Does paying off debt lower DTI immediately?
Yes in principle, but reports take 30–60 days to update.
Why minimum payment not balance?
DTI measures monthly cash-flow capacity.
Does rent count?
Yes, as housing obligation.
How to lower DTI quickly?
Pay off an entire small debt to eliminate its payment.