Before a lender looks at your credit score, they look at one simpler calculation: how much of your income is already committed to debt. It is called the debt-to-income ratio, and it quietly determines both whether you are approved and what rate you are offered.
How to calculate it
The ratio compares your total monthly debt payments with your gross monthly income.
The formula
- DTI = total monthly debt payments ÷ gross monthly income × 100
- Use minimum payments on revolving credit, not what you actually pay.
- Use gross income — before tax — because that is what lenders use.
If you earn $5,000 a month before tax and pay $400 on a car loan, $150 on a personal loan and $120 in credit card minimums, your DTI is:
($400 + $150 + $120) ÷ $5,000 = 13.4%
What counts as a good ratio
| DTI | Lender view | What it means for you |
|---|---|---|
| Under 20% | Strong | Access to the best rates; plenty of headroom |
| 20–36% | Acceptable | Approved at competitive rates in most cases |
| 36–43% | Caution | Higher rates, smaller limits, more scrutiny |
| Over 43% | High risk | Frequent declines, or only expensive offers |
The 43% line is the one most lenders treat as a hard limit.
Why lenders care so much
A credit score tells a lender how you have handled borrowing in the past. The debt-to-income ratio tells them whether you can handle more in the present. Both matter, but DTI is about capacity — the question of whether adding a payment would leave you stretched.
A borrower with a strong credit score but a 50% DTI is a risk, because any income disruption would make existing obligations difficult. A borrower with a modest score and 15% DTI often gets approved, because the numbers leave room to absorb a shock.
The difference between front-end and back-end ratios
Lenders sometimes use two versions:
| Ratio | What it includes | Typical limit |
|---|---|---|
| Front-end | Housing costs only (mortgage or rent) | Under 28% |
| Back-end | All debt payments, including housing | Under 36–43% |
Mortgage lenders look at both. Consumer lenders usually focus on the back-end ratio, since housing is typically the largest fixed cost.
How to improve your ratio
There are only three levers: reduce debt payments, increase income, or let time do the work by not adding new credit.
Clear revolving balances
Credit cards carry high minimum payments relative to their balance. Paying one down removes a disproportionate share of your monthly obligation.
Increase declared income
A raise, a second income, or a documented side income all lower the ratio directly. Lenders usually require evidence, so keep records.
Wait for debts to close
As loans are repaid and closed, the payments drop out of the calculation entirely. Sometimes waiting six months changes the answer completely.
See what a payment would do to your ratioWork out a monthly payment for a specific amount, then check it against your income.
Open the loan calculatorTiming matters. Multiple credit applications in a short period can signal distress to lenders and lower your score. Find out your DTI and your likely rate before you apply, and approach lenders in a considered order rather than firing off applications.
Frequently asked questions
What is a good debt-to-income ratio?
Under 36% is generally healthy and under 20% is comfortable. Many lenders grow hesitant above 43%, and some decline outright above that level.
Does DTI affect my interest rate?
Yes. A higher ratio signals greater risk, which typically means a higher offered rate, a smaller approved amount, or both.
How quickly can I lower my ratio?
Clearing a credit card balance can lower it within one billing cycle, since the minimum payment disappears from the calculation. Closing a loan has an immediate effect too.
Is rent included in the ratio?
Often yes, as a housing cost in the front-end calculation. Consumer lenders vary, so ask how they calculate it if you are near a threshold.
Sources and verification
Everything on this page that could be checked was checked against the primary sources below — regulators and government agencies rather than summaries of them. Where a figure is an illustrative example rather than a quoted statistic, the page says so.
- What is a debt-to-income ratio?Consumer Financial Protection Bureau (US)
- Mortgages: tools and resourcesConsumer Financial Protection Bureau (US)
- Consumer Credit — G.19 statistical releaseBoard of Governors of the Federal Reserve System (US)
Last reviewed by Mohamed Elnhas. If you find an error on this page, tell us — corrections are made to the page and noted, not quietly removed.