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
There is no single legal cutoff for a "good" DTI. Each loan program publishes its own limits, and the United States and Canada measure the ratio differently. These are the published limits as of November 2026.
| Program | Published limit | Where it stretches |
|---|---|---|
| Fannie Mae conventional, manual underwriting (US) | 36% total DTI | Up to 45% when credit score and reserve requirements are met. |
| Fannie Mae conventional, Desktop Underwriter (US) | 50% total DTI | This is the maximum for loans run through the automated system. |
| FHA, manual underwriting (US) | 31% housing, 43% total | Up to 40% housing and 50% total for credit scores of 580 or higher with two compensating factors, such as verified cash reserves. |
| CMHC mortgage loan insurance (Canada) | 39% GDS, 44% TDS | Gross debt service (GDS) covers housing costs. Total debt service (TDS) adds all other debts. |
Sources: Fannie Mae Selling Guide B3-6-02; HUD Handbook 4000.1, section II.A.5.d; CMHC debt service calculator. Full list at the end of this article.
Lined up against those limits, this article uses five planning zones. The zones are a shorthand for reading your own number. No agency publishes them.
| DTI | Zone | What it means for you |
|---|---|---|
| Under 28% | Excellent | Well inside every limit in the table above. Strong cash flow. |
| 28%–36% | Healthy | At or under Fannie Mae's 36% baseline. Room for unexpected expenses. |
| 36%–43% | Marginal | Past the 36% baseline. Approval starts to lean on credit score, reserves, or automated underwriting. |
| 43%–50% | Stretched | Past FHA's base 43% ratio. Still inside Fannie Mae's 50% automated maximum, with less room on everything else. |
| Over 50% | Overextended | Above every published limit in the table above. More than half of gross income is committed before taxes. |
The 43% line is the one most people have heard of. It was the DTI cap in the federal General Qualified Mortgage (QM) loan definition. The Consumer Financial Protection Bureau's General QM final rule, issued in December 2020, removed that 43% limit and replaced it with price-based thresholds. 43% also appears as FHA's base total-debt ratio for manually underwritten loans.
Canadian lenders use the two debt service ratios instead. CMHC's calculator states that GDS must not exceed 39% and TDS must not exceed 44%. For uninsured mortgages at federally regulated lenders, the Office of the Superintendent of Financial Institutions (OSFI) sets a minimum qualifying rate: the greater of the mortgage contract rate plus 2% or 5.25%. The payment is tested at that higher rate, so the ratio a lender calculates can be higher than the one you get from your actual payment.
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.
In Canada the same split goes by different names. Gross debt service (GDS) is the front-end ratio and total debt service (TDS) is the back-end ratio. If a Canadian lender quotes you a TDS, compare it to CMHC's 44% TDS limit above.
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 is one illustrative household, not an average. It has strong housing numbers but sits in the marginal zone overall. The non-housing debt ($845 in car, student loan, and card minimums) is what pushes the back-end DTI past 36%. At 41.6% it is above Fannie Mae's 36% baseline for manually underwritten loans, under the 45% that program allows with stronger credit and reserves, and under FHA's 43% base ratio. A new car loan or a larger housing payment would use up that remaining room quickly.
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; is debt consolidation worth it covers when that trade makes sense).
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 often 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. 43% to 50% means you are past FHA's base ratio and near Fannie Mae's 45% and 50% ceilings, and you likely feel that tightness month to month. Above 50% is past every limit in the table above.
If your number is above 36%, the next question is which balance to clear. Snowball vs. avalanche compares the two standard orders, how to pay off credit card debt fast covers the card minimums, and the debt-free date guide shows how long the plan takes.
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.
Last reviewed: November 10, 2026. Replaced the single "2026 thresholds" table, which tied the 43% line to the federal Qualified Mortgage rule, with the limits each program publishes today: Fannie Mae 36%, 45% and 50%, FHA 31/43 and 40/50, and CMHC 39% GDS and 44% TDS. Corrected the 43% explanation, because the CFPB's General QM final rule, issued in December 2020, removed that limit. Removed an unsourced statement that the CFPB flags DTI above 50% as financial stress. Added the Canadian GDS and TDS ratios and the OSFI minimum qualifying rate, relabeled the five zones as this article's planning shorthand, added sources and links to five related posts. The worked example figures are unchanged. First published April 17, 2026.
Unburden is a planning tool. The Burden Score is an educational estimate, not financial advice. Consult a Licensed Insolvency Trustee for personalized debt guidance.
Sources & References
- Fannie Mae Selling Guide B3-6-02, Debt-to-Income Ratios (published April 2, 2025): 36% maximum for manually underwritten loans, up to 45% with credit score and reserve requirements, 50% through Desktop Underwriter
- HUD FHA FAQ: maximum qualifying ratios for manually underwritten loans (Handbook 4000.1, section II.A.5.d): 31/43 base ratios, up to 40/50 with two compensating factors
- CFPB: General QM Loan Definition final rule (issued December 10, 2020): removes the 43 percent DTI limit and replaces it with price-based thresholds
- CFPB: What is a debt-to-income ratio?: monthly debt payments divided by gross monthly income
- CMHC debt service calculator: GDS must not exceed 39%, TDS must not exceed 44%
- OSFI: minimum qualifying rate for uninsured mortgages (page modified January 29, 2026): the greater of the contract rate plus 2% or 5.25%
- Example figures: arithmetic on one illustrative household ($6,000 gross monthly income, $2,495 in required monthly payments); each ratio is payments divided by gross income, rounded to one decimal
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.
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See how these numbers work with your actual debt. Enter your balance, APR, and monthly payment into the debt payoff calculator to get your exact payoff date and total interest cost.