Your credit score gets most of the attention. But when lenders are deciding whether to approve your application — and at what rate — debt-to-income ratio often matters just as much. We've seen borrowers with excellent credit scores get denied because their DTI was too high. We've also seen borrowers with mediocre scores get approved because their DTI was strong. Understanding DTI gives you a complete picture of your borrowing power.
What Is Debt-to-Income Ratio?
Two things to note: DTI uses gross income, not take-home pay. And it includes all minimum debt payments — credit cards, auto loans, student loans, personal loans, mortgage — but not living expenses like utilities, groceries, or insurance (those don't appear on your credit report).
How to Calculate Your DTI in 3 Steps
- Add up all minimum monthly debt payments. Include: mortgage or rent payment, car loan payment, student loan minimum payments, credit card minimum payments, personal loan payments, any other loan minimums. Do NOT include utilities, subscriptions, groceries, or insurance.
- Determine your gross monthly income. Use your pre-tax income. Include salary, wages, consistent freelance income (average of last 2 years), rental income, and any other documented regular income.
- Divide total monthly debt by gross monthly income. Multiply by 100 to get a percentage. That's your DTI.
DTI Thresholds by Loan Type
| Loan Type | Good DTI | Max DTI | Notes |
|---|---|---|---|
| Conventional Mortgage | Below 36% | 45%–50% | Back-end DTI; stricter than other loans |
| FHA Mortgage | Below 43% | 57% (with compensating factors) | More flexible for higher DTI borrowers |
| VA Mortgage | Below 41% | No official max | Residual income calculation also applies |
| Personal Loan (bank) | Below 36% | 43% | Some banks cap lower |
| Personal Loan (online lender) | Below 43% | 50% | Higher DTI accepted at higher APR |
| Business Loan (SBA) | Below 40% | 50% | Uses business + personal DTI |
| Auto Loan | Below 40% | 50% | Less strict than mortgage |
Front-End vs. Back-End DTI
Mortgage lenders use two DTI calculations, which is why mortgage DTI can feel complicated.
Front-end DTI (also called the housing ratio) measures only your proposed housing payment — principal, interest, taxes, and insurance (PITI) — divided by gross income. Most lenders want this below 28% to 31%.
Back-end DTI is what most people mean by DTI — all monthly debt payments (including housing) divided by gross income. This is the number lenders focus on most. When someone says "your DTI needs to be below 43%," they mean back-end DTI.
For personal loans, auto loans, and most non-mortgage products, only back-end DTI matters.
How to Lower Your DTI Before Applying
You have two levers: reduce debt or increase income. Here are the fastest approaches:
Pay off a small account entirely. Eliminating a minimum payment removes it from the DTI calculation completely. Paying off a $2,500 car loan with a $180 monthly payment is worth more to your DTI than paying $2,500 down on your $25,000 mortgage. Target the account with the smallest balance-to-payment ratio.
Don't close paid accounts. Once a debt is gone, keep the account open. Closing it doesn't help your DTI, but it does hurt your credit utilization ratio.
Add documented income sources. Side income, rental income, spousal income, part-time work — if you can document it consistently over 2 years (typically with tax returns), lenders can count it. More gross income in the denominator improves DTI immediately.
Apply with a co-borrower. Adding a second income to the application increases gross income in the calculation. The co-borrower's debts are also included, so this only helps if their income-to-debt ratio is stronger than yours alone.
Wait and pay down credit cards. If your DTI is too high for approval now, a 6-month aggressive payoff plan focused on your highest-minimum-payment accounts can substantially improve where you land. Use our debt consolidation calculator to model different payoff scenarios.