For a home loan, the major programs publish back-end debt-to-income (DTI) limits from 36% to 50%, depending on the program, the loan type and whether the file is underwritten by a person or by an automated system. DTI is your monthly debt payments divided by your gross monthly income. The federal 43% limit that many articles still quote no longer exists in the qualified mortgage rule, so the ceiling that matters is the one set by the program your loan will use.
Key takeaways
- Front-end DTI counts only the housing payment; back-end DTI adds every other monthly debt. Most programs limit the back-end figure, and FHA and USDA also limit the front-end figure.
- As of November 2026, the published limits are 36% for Fannie Mae manual underwriting (up to 45% when the borrower meets the credit score and reserve requirements in Fannie Mae's Eligibility Matrix) and 50% for Desktop Underwriter, 31/43 for FHA manual underwriting, 41% for VA and 29/41 for USDA, each with its own exception route.
- The federal qualified mortgage rule replaced its 43% DTI cap with a price test in a rule issued in December 2020. Lenders must still consider DTI or residual income and verify it.
- The same illustrative borrower at 42.9% back-end DTI is still under only one published ceiling, Desktop Underwriter's 50%, where approval still depends on the system's findings. Every manual route listed here needs an exception or a documented compensating factor.
- The ratio ceilings in the current rule texts are the same ones listed here. What did change for 2026 is the set of loan-size tiers in the federal price test, and FHA's October 2026 letter changes credit-score methodology, not ratios.
How DTI is calculated
The Consumer Financial Protection Bureau (CFPB) defines DTI as all monthly debt payments divided by gross monthly income, meaning pay before taxes and deductions. Mortgage lenders split it into two ratios.
Front-end DTI = proposed monthly housing payment / gross monthly income
Back-end DTI = (housing payment + other monthly debt payments) / gross monthly income
- Housing payment — principal, interest, property taxes, homeowners insurance, and any HOA dues or mortgage insurance that apply to the new loan
- Other monthly debt payments — the recurring obligations described in the next section
- Gross monthly income — qualifying income before taxes; Fannie Mae words its limit as a share of the borrower's stable monthly income
Fannie Mae's Selling Guide section B3-6-02 does not set a front-end limit at all, and neither does VA. FHA and USDA do, which is why a borrower with modest debts but a large housing payment can fail one program and pass another.
What counts as debt and income
The Fannie Mae section lists what goes into the monthly obligations total: the housing payment on the primary residence, installment debts lasting more than ten months, revolving debts, lease payments regardless of expiration date, and alimony, child support or maintenance lasting more than ten months. Installment debts with ten months or fewer remaining count only if they significantly affect the borrower's ability to meet credit obligations. Net losses from rental properties are included as well, and alimony may be subtracted from income instead of counted as a debt.
USDA lists what it leaves out for its guaranteed rural home loans. Under 7 CFR 3555.151, contributions to personal income taxes, retirement accounts, savings, commuting costs, union dues, childcare and other voluntary obligations are not counted in the total debt ratio. In community property states, the debts of a spouse who is not on the loan must be included. Utilities and groceries do not appear in either program's list of obligations.
Because the program definitions differ, the same household can show slightly different ratios depending on the loan type. A lender's worksheet, not a free online calculator, decides the final figure.
Worked example: front and back end
Illustrative example, not a real borrower. A household earns $7,000 gross per month. The proposed housing payment is $1,750 (principal and interest $1,400, property taxes $250, insurance $100). Other debts are a car loan of $350, a student loan of $250 and credit card minimums of $100, which is $700 combined.
- Front-end DTI = $1,750 / $7,000 = 25.0%
- Back-end DTI = ($1,750 + $700) / $7,000 = $2,450 / $7,000 = 35.0%
At 35.0% this household sits under the 36% Fannie Mae manual guideline, FHA's 31/43, VA's 41% and USDA's 29/41, so no program needs an exception. Now raise the housing payment to $2,300, for example by shopping for a pricier home, with the other $700 unchanged.
- Front-end DTI = $2,300 / $7,000 = 32.9%
- Back-end DTI = ($2,300 + $700) / $7,000 = $3,000 / $7,000 = 42.9%
| Program and route | Result at 32.9% / 42.9% |
|---|---|
| Fannie Mae manual underwriting | Above the 36% base; within 45% only if the credit score and reserve requirements in the Eligibility Matrix are met |
| Fannie Mae Desktop Underwriter | Under the 50% maximum; the system's findings decide the rest |
| FHA manual, score 580 or higher | Over 31 on the front end, so it needs the 37/47 tier with one compensating factor |
| VA | Rounds to 43%, over 41%, so it needs a documented justification, unless residual income exceeds the guideline by at least 20% |
| USDA | Over 29 and 41, so it needs a compensating factor and Rural Development approval, or acceptance by USDA's automated system |
The $550 housing increase adds 7.9 points to both ratios, enough to move the file from "no exception" to "exception or compensating factor" on every manual route. Seen from the other side, with $700 of other debt and $7,000 of income, the largest housing payment that fits each baseline is $1,820 under Fannie Mae's 36%, $2,030 under USDA's 29/41 (the front-end limit binds first) and $2,170 under both FHA's 31/43 and VA's 41%. Swap in your own income and debts to see where you land.
Limits by loan program, 2026
The table lists each published limit and the route past it. These are the programs' manual or baseline standards; automated underwriting systems can approve other combinations.
| Program and source | Baseline limit | Route to a higher ratio |
|---|---|---|
| Fannie Mae, B3-6-02 | 36% of stable monthly income, manual underwriting | Up to 45% with the credit score and reserves in the Eligibility Matrix; up to 50% for casefiles underwritten through Desktop Underwriter. Lower maximums can apply to cash-out refinances in Desktop Underwriter, to manually underwritten loans for borrowers without a credit score and to loans with a non-occupant borrower |
| FHA, Handbook 4000.1 manual matrix | 31% housing / 43% total | Score 580 or higher: 37/47 with one of cash reserves, minimal payment increase or residual income; 40/50 with two factors; 40/40 with no discretionary debt. Scores 500 to 579 or no score: 31/43 only. Energy-efficient homes: stretch ratios of 33/45 |
| VA, 38 CFR 36.4340 | 41% or less, rounded to the nearest whole percent, plus a residual income test | Above 41% or short on residual income: approval with the underwriter supervisor's written justification; second-level review waived above 41% when residual income exceeds the guideline by 20% or more |
| USDA, 7 CFR 3555.151 | 29% housing / 41% total, of repayment income | Compensating factors such as a credit score of 680 or higher, a minimal payment increase, savings after closing, or continuous employment with the current employer, with Rural Development approval or acceptance by an agency-approved automated system |
Fannie Mae and Freddie Mac
The Fannie Mae figures above are from the Selling Guide topic dated April 2, 2025. Freddie Mac sets its own ratio rules in section 5401.2 of its Single-Family Seller/Servicer Guide and runs loans through its own automated system, Loan Product Advisor. The two companies' limits are not interchangeable, so a lender's answer for a conventional loan depends on which company will buy it. For one Freddie Mac product, the HFA Advantage mortgage used by state housing finance agencies, Freddie Mac's August 2025 fact sheet sets no maximum housing ratio and a maximum debt payment-to-income ratio of 45% for manually underwritten loans, with Loan Product Advisor setting the limit otherwise. That sheet covers one product only, not every Freddie Mac loan.
FHA, VA and USDA
FHA's matrix is the manual standard. For loans scored by FHA's TOTAL Mortgage Scorecard, the current Handbook 4000.1 (updated August 12, 2026) says a file with an Accept may be eligible for insurance if the lender confirms the data entered is accurate and the loan meets all other FHA requirements. Some Accept files must still be downgraded to manual underwriting, for example after a recent bankruptcy discharge or foreclosure. VA's residual income guideline depends on loan size, family size and region. For a family of four borrowing $80,000 or more, the table in the regulation runs from $1,003 a month in the Midwest and South to $1,025 in the Northeast and $1,117 in the West. Exceeding the guideline by at least 20% means residual income of at least $1,203.60 in the Midwest or South and $1,340.40 in the West. USDA's guaranteed loans also require household income at or below the area's moderate income limit, a home used as the principal residence and an applicant who cannot get conventional mortgage credit.
What changed in 2025 and 2026
The big change came earlier. The CFPB's December 2020 General QM final rule removed the 43% DTI limit from the General QM definition and replaced it with price-based thresholds. A 2021 rule then delayed the mandatory compliance date until October 1, 2022.
Under 12 CFR 1026.43(e)(2), a General QM loan's annual percentage rate (APR) must stay below set margins over the average prime offer rate. The loan-size tiers for those margins are indexed to inflation each year, and the 2026 amounts in the official commentary to Regulation Z are:
- first-lien loans of $137,958 or more: APR less than 2.25 percentage points above the average prime offer rate (2025: $134,841)
- first-lien loans of $82,775 up to $137,958: less than 3.5 points (2025: $80,905)
- first-lien loans under $82,775: less than 6.5 points, with separate tiers for manufactured homes and second liens
The lender must still consider the consumer's DTI ratio or residual income and verify the income and debts behind it. The rule sets no DTI number, so the numbers in this article come from the programs, not from Regulation Z.
The current texts of the program rules cited here show the ceilings listed above: Fannie Mae's B3-6-02 dated April 2, 2025, FHA's Handbook 4000.1 as updated August 12, 2026, and the VA and USDA regulations on eCFR as of November 2026. That is a reading of the current rules, not a log of every lender bulletin, and Fannie Mae can revise the credit score and reserve conditions in its Eligibility Matrix separately. One related 2026 item is FHA Mortgagee Letter 2026-11, issued October 8, 2026. It changes how FHA picks a minimum decision credit score when scores come from several models, adding FICO 10T and VantageScore 4.0 alongside Classic FICO, for case numbers assigned on or after January 1, 2027. The letter says the existing minimum credit score thresholds stay unchanged and only aligns terminology in the manual ratio matrix; the ratios are the same. Regulation Z's current text contains no DTI percentage at all; the 36% figure often quoted as a new cap is Fannie Mae's manual baseline.
Frequently asked questions
Is DTI based on gross or take-home pay?
The CFPB defines it with gross monthly income, which is pay before taxes and deductions. Fannie Mae expresses its limit as a share of stable monthly income, and its DTI denominator is the total monthly income of the borrowers used to qualify.
Do rent, utilities and groceries count as debt?
Utilities and groceries are not on Fannie Mae's list of obligations, and USDA excludes items such as childcare, commuting costs and savings from the total debt ratio. Fannie Mae's list counts the housing payment on the principal residence, which for a purchase is the proposed new payment, and rent or mortgage payments only for non-occupant borrowers, second homes and investment properties.
Do student loans and car loans count if they are almost paid off?
Under Fannie Mae's rules, installment debts with more than ten months left count. Ones with ten months or less left count only if they significantly affect the borrower's ability to meet credit obligations, so a loan with a few payments remaining may drop out of the ratio.
Is there still a 43% maximum for a mortgage?
Not in the federal qualified mortgage definition, which now uses a price test. The lender still has to consider DTI or residual income, and FHA's baseline total ratio of 43% remains in its manual matrix. Other programs publish their own limits, listed in the table above.
Can a VA loan be approved above 41% DTI?
Yes. Under 38 CFR 36.4340, a ratio above 41% can be approved with the underwriter supervisor's written justification of compensating factors. When residual income exceeds the regional guideline by at least 20%, the second-level review and written justification are not required.
How to check your own ratio
- Add up your gross monthly income from stable, documented sources.
- List every monthly payment from your credit report and add the proposed housing payment: principal, interest, taxes, insurance and any HOA or mortgage insurance.
- Divide the housing payment alone by income for the front-end ratio, then everything by income for the back-end ratio.
- Compare both figures with the table above for the program you are considering, and note which exception route applies if you run over.
- Ask the lender which underwriting method and which agency or investor guidelines will apply to your file, since the limit depends on both.
This article is general education, not lending or financial advice. Program rules are summarized as of November 2026; confirm the current limits with a lender before you apply.
Sources
- Fannie Mae Selling Guide, B3-6-02 Debt-to-Income Ratios (April 2, 2025)
- Freddie Mac Single-Family Seller/Servicer Guide, section 5401.2
- Freddie Mac, HFA Advantage Mortgage fact sheet (August 2025)
- HUD Handbook 4000.1, FHA Single Family Housing Policy Handbook (update of August 12, 2026)
- HUD Mortgagee Letter 2026-11 (October 8, 2026)
- 38 CFR 36.4340, VA underwriting standards
- 7 CFR 3555.151, USDA guaranteed loan eligibility and repayment ability
- 12 CFR 1026.43, minimum standards for transactions secured by a dwelling
- Regulation Z official commentary, Supplement I to Part 1026 (2026 General QM thresholds)
- CFPB General QM Loan Definition final rule, December 2020
- CFPB General QM final rule, delay of mandatory compliance date, 2021
- CFPB, What is a debt-to-income ratio?
