DTI Improvement Calculator
Enter your income and every debt to see your current DTI, which program you qualify for, and exactly which debts to pay off first for maximum mortgage qualification impact. Includes income strategies and a prioritized action plan.
Ranked by DTI improvement per dollar spent — the most efficient debts to pay off first to qualify faster.
| Rank | Debt | Balance | Payment | New DTI | DTI Drop | More Home You Can Afford |
|---|---|---|---|---|---|---|
| #1 | Credit Card | $8,000 | $200/mo | 36.4% | -2.7% | +$75,843 |
| #2 | Auto Loan | $18,000 | $380/mo | 34.0% | -5.1% | +$103,595 |
| #3 | Student Loan | $35,000 | $310/mo | 35.0% | -4.1% | +$92,803 |
Prioritized steps to reach 43.0% DTI. Current DTI: 39.1%. Gap: 0.0%.
How to Use This DTI Improvement Calculator
This calculator is an action plan, not just a ratio display. Enter your income and each individual debt with its balance, rate, and payment — then the calculator tells you exactly what to do and in what order to qualify for your target mortgage.
Setting Up Your Debt List
Enter your Gross Monthly Income, the target Home Price and Down Payment percentage, and your current Mortgage Rate. Then add each debt with its name, balance, interest rate, and monthly payment. The calculator builds your complete debt picture and proposed mortgage payment to compute your actual DTI.
Advanced: Debt Payoff Impact Tab
The Debt Payoff Impact tab ranks your debts by DTI improvement per dollar — showing exactly which debt to pay off first to qualify fastest and how much more home you can afford after each payoff. The Income Strategies tab lets you add a co-borrower, bonus income, rental income, and part-time income to see how documented income reduces your DTI without paying off any debt. The Consolidation tab models whether combining debts into one lower-payment loan helps your DTI.
Pro: Full Action Plan and What Counts
The Full Action Plan gives you 5 prioritized steps with timelines and DTI impact estimates. The What Counts tab clarifies exactly which expenses count in mortgage DTI (auto loans do, utility bills do not, buy-now-pay-later increasingly does). The Qualification Matrix shows which loan programs you qualify for now versus after improvement.
DTI Improvement Formula
Front-End DTI = (Proposed Monthly PITI) / Gross Monthly Income × 100
DTI Reduction from Payoff = Paid-Off Monthly Payment / Gross Monthly Income × 100
Example: $380 auto loan / $7,500 income = 5.1% DTI reduction
Additional Qualifying Income = Co-Borrower + (Annual Bonus ÷ 24) + (Rental × 0.75) + Part-Time
Max Home Price = Max Qualifying Loan / (1 − Down Payment %)
Max Qualifying Loan = (Income × DTI Limit − Other Debts) × [Annuity Factor at Rate/Term]
The key insight: eliminating a $380/month debt from a $7,500 income base drops DTI by 5.1 percentage points. That same $380/month, if kept, would allow the lender to qualify you for an additional $58,000 in home price at today's rates. This is why paying off small high-payment debts is often more effective than paying down a large low-payment debt by the same dollar amount.
Example: David Improves His DTI to Qualify
Scenario: David earns $7,200/month and wants to buy a $380,000 home
| Gross Monthly Income | $7,200 |
| Auto Loan Payment | $445/mo ($22,000 balance) |
| Student Loan Payment | $280/mo ($28,000 balance) |
| Credit Card Minimum | $180/mo ($9,000 balance) |
| Proposed Mortgage (10% down) | $2,151/mo |
| Current DTI | 43.8% — barely over FHA 43% limit |
| Step 1: Pay off credit card ($9,000) | New DTI: 41.3% — qualifies for FHA |
| DTI Improvement | -2.5% from eliminating $180/mo payment |
| Additional Home Affordable | +$27,600 after payoff |
David paid off his credit card with savings, dropping DTI from 43.8% to 41.3%. He now qualifies for FHA financing on his $380,000 target home. The $9,000 spent on the credit card improved his qualifying loan amount by more than that amount.