Debt-to-Income Ratio Calculator
Calculate your debt-to-income ratio and see how lenders view your finances.
How the Debt-to-Income Ratio Works
Your debt-to-income ratio (DTI) is the percentage of your gross monthly income that goes toward required debt payments. It's the single most important number lenders use to decide whether you can afford a new loan — more important than your credit score for determining how much you can borrow. A lower DTI means more of your income is free to handle emergencies and a new loan payment.
The math is simple: divide total monthly debt payments by gross monthly income (before tax). If you earn $6,000 gross and pay $2,000 a month in debt obligations, DTI = 2,000 / 6,000 = 33.3%. Mortgage lenders treat DTI as a hard underwriting gate: go above 43% on a conventional loan and most lenders decline regardless of credit score.
This calculator does the math for you and checks your DTI against the main US mortgage thresholds: Conventional, FHA, VA, and USDA. Change any input to see your ratio update instantly.
The DTI Formula
Total Monthly Debt Payments— all required monthly payments: mortgage/rent, auto, student, credit-card minimums, personal loans, child supportGross Monthly Income— income before taxes and deductions (W-2 wages, self-employment, bonuses, documented side income)
Lenders typically compute two DTI ratios, not one: the front-end ratio (housing only) and the back-end ratio (all debt including housing). Both matter, but back-end is the one most commonly quoted and used as the approval threshold.
Front-End vs. Back-End DTI
A long-standing mortgage underwriting rule: keep front-end DTI (housing) at or below 28% of gross monthly income, and back-end DTI (all debt) at or below 36%. A household with $6,000 gross monthly income should keep housing under $1,680 and total debt payments under $2,160. It's conservative but bulletproof — if you can meet 28/36, you can handle almost any loan.
DTI Benchmark Table
Use this as a gut-check before you apply for any loan.
| DTI range | Rating | What it means |
|---|---|---|
| Below 36% | Good — Approved | Most lenders approve. Best rates available. You have cushion for surprises. |
| 36%–42% | Caution | Approvable for most loans; may pay higher rates or need compensating factors (large down payment, reserves). |
| 43%–49% | Mortgage risk | Above the Qualified Mortgage safe-harbor (43%). Some lenders decline; FHA may still approve with strong credit and residual income. |
| 50% and above | High risk | Most lenders decline. You are likely over-leveraged. Focus on debt reduction before new borrowing. |
Mortgage Program DTI Thresholds (2026)
| Program | Front-end max | Back-end max | Notes |
|---|---|---|---|
| Conventional (Fannie Mae / Freddie Mac) | 28% (guideline) | 43–50% | 45% is a common automated-underwriting cap; 50% allowed with strong compensating factors (reserves, high credit score). |
| FHA | 31% | 43% (up to 57% with compensating factors) | Per HUD Handbook 4000.1. Automated underwriting can approve above 43% with residual income and reserves. |
| VA | — (not used) | 41% (guideline) | No hard cap; VA focuses on residual-income table. DTI above 41% requires residual income to exceed 120% of guideline. |
| USDA (Rural Development) | 29% | 41% | Can be exceeded up to 32/44% with strong credit and reserves. |
| Jumbo (non-conforming) | — (varies) | 38–43% | Lender-defined. Large down payments and reserves required. |
Sources: Consumer Financial Protection Bureau Qualified Mortgage rule; HUD FHA Handbook 4000.1; VA Lenders Handbook M26-7; USDA Rural Development handbook; Fannie Mae / Freddie Mac selling guides. Last verified 2026-04-14.
What Counts — and What Doesn't
Counted as monthly debt
- Mortgage principal + interest (or rent)
- Property taxes, homeowners insurance, HOA (if PITI is used)
- Auto loans and leases
- Student loans — actual payment, or 1% of balance if in deferment (Fannie Mae / FHA rule)
- Credit card minimum payments (not total balance)
- Personal and installment loans
- Court-ordered child support and alimony
- Co-signed loans you legally owe
NOT counted
- Utilities (electric, gas, water, internet, phone)
- Groceries and food
- Gasoline and car maintenance
- Insurance premiums paid outside escrow (auto, health, life)
- 401(k) contributions and voluntary savings
- Streaming services and discretionary subscriptions
- Medical bills unless in collections or on a payment plan
Worked Example — Priya's DTI
How to Lower Your DTI
Pay off the smallest credit card balance — it removes the entire minimum payment from the DTI numerator. Refinance a high-rate auto loan to a longer term (trade-off: more total interest but lower monthly). Decline pre-approved credit card offers that don't reduce existing debt.
Accelerate payoff on the smallest loan (debt snowball), then roll that payment into the next one. Pay off car loans before applying for a mortgage. Consolidate high-rate credit cards into a lower-rate personal loan with a longer term (verify net DTI impact).
A $500/month raise lowers DTI as effectively as a $500/month debt payoff. Document side income with at least 2 years of tax returns — most lenders require that paper trail. Freelance or 1099 income requires 2 years of Schedule C filings to count.
How to Use This Calculator
- Enter your gross monthly income — pre-tax, annual salary ÷ 12.
- Fill in each debt category: mortgage/rent, car loan, student loan, credit card minimum, other.
- Read the DTI percentage and the verdict (Excellent / Good / Fair / Poor).
- Compare to lender thresholds in the benchmark and program tables above.
- Model "what-if" scenarios by reducing individual debts — see how paying off the smallest card changes your ratio.
- Before applying for a mortgage, compute your projected DTI with the new mortgage payment in place of rent.
Methodology & Assumptions
- Computes back-end DTI using the standard formula: total monthly debt payments ÷ gross monthly income × 100.
- Uses gross income (pre-tax), matching lender underwriting practice.
- Assumes all debts listed are legally required recurring payments.
- Does not separate front-end from back-end in the main output — front-end requires splitting housing from other debts (see the explainer above).
- All math runs in your browser; no data leaves your device.
Glossary
- Debt-to-Income Ratio (DTI)
- Total monthly debt payments divided by gross monthly income, expressed as a percentage. A core mortgage underwriting number.
- Front-end DTI
- Housing-only ratio: mortgage P&I + taxes + insurance + HOA + PMI, divided by gross monthly income. Traditional guideline: 28% max.
- Back-end DTI
- Total recurring debt ratio: housing plus all other required monthly debt payments, divided by gross monthly income. Traditional guideline: 36%; Qualified Mortgage cap: 43%.
- Gross monthly income
- Monthly income before taxes and deductions — the number lenders use for DTI.
- Qualified Mortgage (QM)
- A CFPB rule defining "safe harbor" mortgages. A key requirement: back-end DTI must not exceed 43% (except for small-lender portfolio loans).
- PITI
- Principal + Interest + Taxes + Insurance — the four components of a full mortgage payment used in front-end DTI.
- Residual income
- VA-specific measure: gross income minus all monthly obligations, taxes, and estimated living expenses. Must exceed a regional table.
- 28/36 rule
- A traditional guideline: keep front-end DTI ≤ 28% and back-end DTI ≤ 36% of gross monthly income.
- Credit utilization
- Credit card balances ÷ total credit limits. Different from DTI but correlated; both affect mortgage approval.
- Compensating factors
- Underwriting positives (large down payment, high reserves, long job tenure, high credit score) that allow lenders to approve above standard DTI limits.
Frequently Asked Questions
Total monthly debt payments divided by gross monthly income, expressed as a percentage. If you earn $6,000 gross per month and pay $2,000 in debt, DTI = 33.3%. Lenders use it to measure how much of your income is already committed.
Front-end = housing only (mortgage P&I + taxes + insurance + HOA + PMI), with a 28% traditional target. Back-end = housing + all other debts (auto, student, credit cards), with a 36% traditional target and a 43% Qualified Mortgage cap.
Conventional: back-end ≤ 43% (sometimes 50% with compensating factors). FHA: ≤ 43% (up to 57% with strong residual income). VA: 41% guideline, no hard cap. USDA: 29/41%. Below 36% is ideal.
Below 36% is good — most lenders approve, best rates available. 36–42% is caution zone. 43% is the Qualified Mortgage safe-harbor ceiling. Above 50% is high risk and usually declined.
Mortgage/rent, auto, student loans, credit card minimums, personal loans, child support, alimony. NOT counted: utilities, groceries, gas, phone, streaming services, 401(k) contributions, or insurance premiums paid outside escrow.
Pay off the smallest credit card (removes a minimum payment). Refinance high-rate loans to longer terms. Pay off an auto loan before applying for a mortgage. Document side income with 2 years of tax returns. Even $200/month in debt elimination shifts DTI by 3–4 points on a $6K income.
Directly no — FICO and VantageScore don't use DTI. Indirectly yes — high credit card balances drive both DTI and credit utilization (a major FICO factor).
Yes, current rent counts in back-end DTI. When applying for a mortgage, lenders compute a "proposed DTI" using the new mortgage payment in place of rent.
Front-end DTI ≤ 28%, back-end DTI ≤ 36% of gross monthly income. Conservative but bulletproof. On $6,000 gross, that's housing ≤ $1,680 and total debt ≤ $2,160.
Yes. Fannie Mae and most conventional lenders use the greater of the actual payment on the credit report or 1% of the outstanding balance. FHA uses 1% or the actual payment. This surprises many first-time buyers with deferred student loans.