Debt-to-income ratio is one of those numbers you only hear about when you're applying for something. A mortgage, a car loan, a rental. A lender asks for it, quotes a threshold, and decides. Then the number disappears again.
Which is a shame, because DTI is one of the most honest financial metrics you can calculate for yourself. It answers a single, concrete question: of every dollar you earn, how much is already promised to a debt payment before it hits your checking account? That is a more useful signal than a credit score for deciding whether your money situation is healthy or slowly tightening.
This article covers what counts as a "good" DTI by lender standards, how to calculate yours in about two minutes, and why the answer a lender likes is not necessarily the answer that should satisfy you.
The Formula
Debt-to-income ratio is:
Total monthly debt payments ÷ Gross monthly income × 100
Two definitions matter before you calculate:
Gross monthly income is pre-tax. If you earn $72,000 per year, your gross monthly income is $6,000. Not your take-home. DTI uses the top-line number.
Monthly debt payments means the minimum required payments, not your actual payments. If you pay $500 a month on a credit card with a $25 minimum, the DTI formula uses $25. Lenders care about obligations, not habits. For this same reason, DTI does not include groceries, utilities, streaming subscriptions, or any other non-debt spending. Only the bills with a contractual minimum.
The 2026 Thresholds
Different lenders use slightly different cutoffs, but the zones below are close to universal in North America as of April 2026.
| DTI | Lender read | What it means for you |
|---|---|---|
| Under 28% | Excellent | Strong cash flow. Most major purchases are within reach. |
| 28%–36% | Healthy | Conventional loans approve easily. Room for unexpected expenses. |
| 36%–43% | Marginal | Most conventional mortgages still available, but rates and terms tighten. |
| 43%–50% | Stretched | Above the federal QM rule for conventional mortgages. FHA may still work. |
| Over 50% | Overextended | CFPB flags this zone as financial stress. Most doors close. |
Sources: Consumer Financial Protection Bureau Qualified Mortgage rule (12 CFR 1026.43); Fannie Mae Selling Guide B3-6-02 (2026); FHA Single Family Housing Policy Handbook 4000.1.
The 43% line is the one most people have heard of. It comes from the federal Qualified Mortgage (QM) rule, which is what lets lenders originate conforming mortgages with a safe-harbor protection. Loans above 43% back-end DTI exist, but the lender is doing extra work to prove the loan is repayable and typically charging for it.
Front-End vs. Back-End DTI
When a mortgage lender quotes "DTI," they usually mean back-end DTI: all monthly debt payments, housing included, divided by gross monthly income. Some also track front-end DTI: only housing costs divided by gross monthly income.
Housing costs in front-end DTI usually mean PITI: principal, interest, property tax, and insurance. Homeowners association dues and private mortgage insurance, if applicable, are added on top. Rent counts the same way if you're not the owner.
A Worked Example
Take a household with $6,000 gross monthly income. Monthly debt obligations look like this:
| Obligation | Monthly minimum |
|---|---|
| Rent | $1,650 |
| Car loan | $420 |
| Student loan (federal) | $240 |
| Credit card minimums (3 cards) | $185 |
| Total monthly debt | $2,495 |
Back-end DTI: $2,495 ÷ $6,000 = 41.6%.
Front-end DTI (housing only): $1,650 ÷ $6,000 = 27.5%.
This household has strong housing numbers but is in the marginal zone overall. The non-housing debt ($845 in car, student loan, and card minimums) is what's pushing the back-end DTI past 36%. A conventional mortgage may still be possible (under 43%), but the household has little room for a new car loan or a larger mortgage without crossing the 43% QM line.
This household is not in trouble by lender standards, but 41 cents of every pre-tax dollar is pre-assigned. Take out taxes and the share of take-home income going to debt is closer to half. That is what DTI is really measuring: how much of your future you have already spent.
How Each Debt Moves the Needle
The useful thing about DTI is that you can see exactly what each obligation costs you in percentage-points. On a $6,000 gross monthly income:
| Monthly debt payment | DTI impact |
|---|---|
| $100 | +1.67 points |
| $300 | +5.00 points |
| $500 | +8.33 points |
| $1,000 | +16.67 points |
| $1,500 | +25.00 points |
Each row: dollar amount divided by $6,000 gross monthly income.
Paying off the $420 car loan in the example above moves the household from 41.6% DTI to 34.6%: from "marginal" into "healthy." That is roughly seven percentage points for one account. For someone thinking about qualifying for a mortgage in 6 to 12 months, knocking out the one account that moves DTI the most is usually a more efficient move than trimming across everything at once.
Run your numbers in the DTI Calculator →
Two Ways to Improve DTI
There are only two levers: reduce monthly debt payments, or raise gross income. Everything else is a version of one of those.
Lever 1: Reduce monthly debt payments. Not the total debt balance, the required monthly minimums. Paying down a credit card below the minimum threshold does not change the $25 minimum until you close the account or pay it off entirely. Paying off a car loan 18 months early instantly removes that monthly payment from the DTI calculation. Consolidating higher-rate debt into a lower-rate personal loan with a longer term lowers the monthly payment (though it usually raises total interest paid, depending on the term, per the consolidation math article).
Lever 2: Raise gross income. A raise, a higher-paying job, a side hustle, an overtime pattern. DTI responds immediately to gross income changes because it's the denominator in the formula. Going from $6,000 to $6,500 gross monthly income drops the 41.6% DTI in the example above to 38.4%, without paying down a single dollar of debt.
The fastest DTI improvement is almost always paying off one smaller debt and adding any income increase at the same time. Paying off the $240 student loan minimum and adding $300 of reliable side income on a $6,000 gross moves DTI from 41.6% to roughly 35.8%: out of the marginal zone into healthy, in one step.
Where DTI Lies
DTI has one major blind spot that lenders do not care about but you should.
The formula uses gross income, not take-home. For someone in a high-tax bracket or a province/state with heavy deductions, the gap between gross and net can be 30% or more. A household showing a 35% back-end DTI on gross income may be sending closer to 50% of net income to debt payments. That is a meaningful difference, especially if the non-debt budget (groceries, utilities, childcare) is tight.
If you want the honest read on your cash flow, calculate DTI twice: once on gross (the version a lender sees) and once on net (the version that actually determines whether you have money left at the end of the month). The second number is the one that tells you if you're stretched.
DTI vs. Your Burden Score
DTI and the Burden Score measure related but different things. DTI answers "how much of your pre-tax income is committed to debt?" The Burden Score answers "how vulnerable are you if something goes wrong?" A household can have a mid-range DTI (35%) and still have a high Burden Score if its cash reserves are thin, its income is inconsistent, or its debt mix is expensive.
Lenders built DTI. It's a good measure of creditworthiness. It is not a complete measure of financial health. The Burden Score was built to fill that gap.
Quick Self-Check
Before you look up your DTI formally, a 60-second gut check:
- Add up your rent or mortgage payment, minimum car payment, minimum student loan payment, and minimum credit card payments. Round up.
- Divide by your gross monthly income (annual salary ÷ 12 if you're salaried; average of last 3 months if variable).
- Multiply by 100.
That number is your rough back-end DTI. Under 36% means you have margin. 36% to 43% means the next major obligation will tighten things. Above 43% means you are already past the line lenders use for standard mortgages, and you likely feel that tightness month to month.
The DTI calculator on Unburden breaks this out with each debt listed individually and shows front-end and back-end side by side, so you can see exactly which accounts are doing the damage.
Calculate Your DTI
Enter your income and your monthly debt payments. The DTI Calculator shows your front-end and back-end ratios, the lender bracket you fall in, and what paying off each account would do to the number.
Open the CalculatorSources & References
- Consumer Financial Protection Bureau, "What is a debt-to-income ratio?"
- Consumer Financial Protection Bureau, "Regulation Z, 12 CFR 1026.43 (Qualified Mortgage rule),"
- Fannie Mae, "Selling Guide B3-6-02: Debt-to-Income Ratios," 2026
- U.S. Department of Housing and Urban Development, "FHA Single Family Housing Policy Handbook 4000.1," April 2026
- Bankrate, "What Is Debt-to-Income Ratio?" April 2026
- NerdWallet, "Debt-to-Income Ratio: How to Calculate It," April 2026