Your debt-to-income ratio (DTI) is one of the most important numbers in your financial life—even if you've never heard of it. Lenders care about it. You should too.
Here's everything you need to know.
What Is Debt-to-Income Ratio?
DTI measures what percentage of your monthly income goes toward debt payments. It's calculated by dividing your total monthly debt payments by your gross monthly income.
The formula:
DTI = (Monthly Debt Payments ÷ Gross Monthly Income) × 100
Example:
- Monthly debt payments: $1,800
- Gross monthly income: $5,000
- DTI: ($1,800 ÷ $5,000) × 100 = 36%
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Open Debt-to-Income CalculatorWhat Counts as Debt?
When calculating DTI, include:
Yes, include:
- Mortgage or rent payment
- Car loans
- Student loans
- Credit card minimum payments
- Personal loans
- Child support/alimony
- Any other loan payments
No, don't include:
- Utilities
- Insurance (unless rolled into mortgage)
- Groceries
- Subscriptions
- Gas
- Other non-debt expenses
What's a Good DTI Ratio?
| DTI Range | Rating | What It Means |
|---|---|---|
| Under 20% | Excellent | You have plenty of room to manage debt |
| 20-35% | Good | Healthy balance, most lenders are comfortable |
| 36-43% | Fair | Getting stretched; new credit may be harder |
| 44-50% | Concerning | Significant financial stress; limited options |
| Over 50% | Critical | High risk; take action to reduce debt |
For Mortgage Approval
Lenders typically want:
- Front-end DTI (housing only): Under 28%
- Back-end DTI (all debt): Under 36%
Some loan programs allow up to 43-50%, but you'll likely pay higher interest rates.
For General Financial Health
Many financial advisors recommend keeping total DTI under 35% for a comfortable lifestyle with room to save and handle emergencies.
Why DTI Matters
1. Loan Approval
When you apply for a mortgage, car loan, or credit card, lenders calculate your DTI. A high DTI signals risk—you might not be able to handle another payment.
2. Interest Rates
Even if you're approved with a high DTI, you'll often pay higher interest rates. Lenders charge more when they perceive more risk.
3. Financial Flexibility
A high DTI means most of your income is already committed to debt payments. There's little room for:
- Building savings
- Handling emergencies
- Taking advantage of opportunities
- Enjoying life
4. Stress
Living with a 50%+ DTI is stressful. Every unexpected expense becomes a crisis when there's no margin.
How to Lower Your DTI
You have two levers: reduce debt payments or increase income.
Reduce Debt Payments
Pay off debt: Every debt you eliminate removes a payment from your DTI calculation. Focus on smaller debts first for quick DTI wins.
Refinance: If you can get lower interest rates on existing debt, your monthly payments decrease.
Consolidate: Combining debts might lower your total monthly payment (but watch the total interest cost).
Avoid new debt: Every new loan or credit card balance increases your DTI.
Increase Income
Ask for a raise: Even a 5-10% raise improves your DTI.
Take on a side gig: Extra income can be used to pay down debt or simply improves the ratio.
Find a higher-paying job: The most impactful but also most difficult option.
DTI vs. Credit Score
People often confuse DTI with credit score, but they measure different things:
| Factor | Credit Score | DTI |
|---|---|---|
| What it measures | How well you manage credit | How much income goes to debt |
| Range | 300-850 | 0-100% (theoretically) |
| Based on | Credit history, utilization, etc. | Current income vs. payments |
| Shown on credit report | Yes | No |
You can have a great credit score (always pay on time) but terrible DTI (too much debt relative to income). Lenders look at both.
Common DTI Misconceptions
"Rent doesn't count since it's not debt"
Actually, lenders DO include rent (or mortgage) in DTI calculations. It's a recurring monthly obligation.
"I should only count minimums"
Correct! DTI uses minimum payments, not what you actually pay. If your minimum is $50 but you pay $200, use $50 for DTI.
"A low DTI means I'm doing great financially"
Not necessarily. A 10% DTI means little of your income goes to debt—but if that's because you earn $20,000/year, you might still be struggling. DTI is one metric among many.
"I need 0% DTI"
A mortgage and car loan at reasonable levels are normal. The goal isn't to have no debt; it's to have manageable debt that doesn't compromise your lifestyle or financial security.
Your DTI Action Plan
Step 1: Calculate your current DTI
Add up all monthly debt payments. Divide by gross monthly income. That's your number.
Step 2: Assess where you stand
Under 35%? You're in good shape. Over 43%? Time to take action.
Step 3: Set a target
If your DTI is high, what would it take to get under 35%? How much debt needs to go, or how much more income do you need?
Step 4: Make a plan
Whether it's attacking debt with the snowball method, negotiating a raise, or both—take concrete steps toward your target DTI.
The Bottom Line
Your DTI ratio is a snapshot of your financial obligations versus your income. It affects your ability to borrow, the rates you pay, and your overall financial stress level.
The magic number most people should aim for: under 35%.
If you're above that, don't panic—but do make a plan. Every debt you pay off brings that ratio down and opens up more financial freedom.