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DTI Ratio for Mortgages 2026: Post-2022 CFPB QM Rule, Real Limits
Your DTI ratio is the single most important number in mortgage underwriting. It determines how much you can borrow, which loan programs you qualify for, and whether compensating factors can push your approval higher. This guide covers both front-end and back-end DTI, the eight CFPB Ability-to-Repay factors lenders must verify (12 CFR § 1026.43(c)(2)), and the critical 2022 change to the CFPB Qualified Mortgage rule that most calculator sites still get wrong.
The 43% DTI bright-line was eliminated in 2022. Most calculator sites still get this wrong.
The CFPB General QM Final Rule (12 CFR § 1026.43(e)(2)), published at 86 Federal Register 22844 on 26 April 2021 and effective 1 October 2022, replaced the pre-2022 43% back-end DTI bright-line with an Annual Percentage Rate (APR) threshold relative to the Average Prime Offer Rate (APOR).
A loan qualifies for the General QM safe-harbour if its APR does not exceed APOR by more than the applicable threshold. The thresholds depend on lien position and loan amount:
| Lien / Loan Size | APR Over APOR Threshold |
|---|---|
| First-lien, loan ≥ $124,331 | 2.25 percentage points |
| First-lien, $74,599 - $124,331 | 3.50 percentage points |
| First-lien, < $74,599 | 6.25 percentage points |
| Subordinate-lien, ≥ $74,599 | 3.50 percentage points |
| Subordinate-lien, < $74,599 | 6.50 percentage points |
Source: CFPB General QM Final Rule, 12 CFR § 1026.43(e)(2)(vi). Dollar thresholds adjust annually for inflation; verify the current-year figures at consumerfinance.gov/rules-policy/regulations/1026/43. The thresholds above are the 2025 dollar figures published in the CFPB's annual TILA / RESPA threshold-adjustment notice.
Why this matters in practice. Most conventional lenders continue to treat 43% back-end DTI as a soft operational ceiling because of Fannie Mae Selling Guide B3-6 and Freddie Mac Single-Family Guide § 5401.2 DTI caps, not because of the CFPB rule. Fannie Mae Desktop Underwriter and Freddie Mac Loan Product Advisor will return Approve / Eligible findings up to 50% back-end DTI in many scenarios. Lenders that originate loans under the General QM safe-harbour now manage QM eligibility through pricing (APR / APOR spread) rather than through the 43% DTI test. The bright-line is gone from the regulation; the habit persists in the industry.
What Is DTI and Why Lenders Care
DTI measures how much of your gross monthly income goes to debt payments. Lenders use two versions per the CFPB ATR rule (12 CFR § 1026.43(c)(2)(vii)) and the Fannie Mae Selling Guide B3-6 framework:
Front-End DTI
Housing costs / Gross monthly income
Includes only the proposed mortgage payment: principal, interest, property taxes, homeowner insurance, PMI / MIP, and HOA fees. Conventional lenders cap at 28%; FHA Handbook 4000.1 Section II.A.5.a.iii allows 31%.
Back-End DTI
(Housing + all debts) / Gross monthly income
Housing costs plus all monthly debt obligations per Fannie Mae B3-6-05: car loans, student loans, credit card minimums, personal loans, child support, alimony. This is the primary operational metric.
Worked example: $7,500/month gross income at PMMS 6.43% (2 July 2026)
Proposed housing payment (PITI): $2,100/month
Car loan: $400/month | Student loans: $300/month | Credit cards: $150/month
Front-end DTI: $2,100 / $7,500 = 28.0%
Back-end DTI: ($2,100 + $850) / $7,500 = 39.3%
Both ratios are within conventional and FHA operational ceilings. This borrower would likely be approved under Fannie Mae B3-6 and FHA Handbook 4000.1 Section II.A.5 standards.
The 8 CFPB Ability-to-Repay Factors
Under 12 CFR § 1026.43(c)(2), lenders originating a covered transaction must consider and verify these 8 underwriting factors. The rule derives from the Truth in Lending Act (15 U.S.C. § 1639c) and the Dodd-Frank Act § 1411.
- Current or reasonably expected income or assets (other than the collateral)
- Current employment status
- Monthly payment on the covered transaction
- Monthly payment on any simultaneous loan
- Monthly mortgage-related obligations (taxes, insurance, HOA, MIP)
- Current debt obligations, alimony, and child support
- Monthly debt-to-income ratio or residual income
- Credit history
Source: 12 CFR § 1026.43(c)(2)(i)-(viii). The CFPB does not specify how to weight the factors; lenders apply Fannie Mae, Freddie Mac, FHA, or VA selling-guide standards in practice.
Operational DTI Limits by Loan Type (Named Source for Each)
| Loan Type | Front-End | Back-End Standard | Back-End Maximum* | Named Source |
|---|---|---|---|---|
| Conventional | 28% | 43% | 50% (DU / LPA approval) | Fannie Mae Selling Guide B3-6-02; Freddie Mac SF Guide § 5401.2 |
| FHA | 31% | 43% | 50-57% (manual compensating) | HUD Handbook 4000.1 Section II.A.5.a.iii |
| VA | N/A | 41% (guideline) | Residual income test controls | VA Pamphlet 26-7 Chapter 4; 38 C.F.R. § 36.4340 |
| USDA | 29% | 41% | 44% (GUS approval) | USDA HB-1-3555 § 11.2 |
| QM safe-harbour (post-2022) | N/A | No DTI cap; APR/APOR test | Pricing-based, not DTI-based | CFPB 12 CFR § 1026.43(e)(2)(vi); 86 FR 22844 |
*Maximum DTI requires compensating factors per the cited source: high credit score, cash reserves, automated underwriting Approve / Eligible finding, or for VA, residual income exceeding the regional minimum by 120%+.
What Counts as Debt (and What Does Not)
Per Fannie Mae Selling Guide B3-6-05 (Monthly Debt Obligations) and FHA Handbook 4000.1 Section II.A.5.a.iv.
Counts Toward DTI
- + Car loans and lease payments
- + Student loans (Fannie 0.5% / Freddie 1% of balance if no documented payment)
- + Credit card minimum payments
- + Personal loans
- + Child support and alimony
- + Other installment debts on credit report
- + Co-signed loans (counts as your debt per Fannie B3-6-05)
Does NOT Count Toward DTI
- - Utilities (electric, gas, water)
- - Cell phone bill
- - Car insurance
- - Health insurance premiums
- - Groceries and food
- - Streaming and subscriptions
- - Current rent (replaced by mortgage)
Compensating Factors That Allow Higher DTI
Per Fannie Mae Selling Guide B3-6-02 and FHA Handbook 4000.1 Section II.A.5.d, these factors can support approval above standard operational DTI ceilings:
Cash Reserves
6+ months of mortgage payments in savings after closing. The single most powerful compensating factor for both conventional and FHA (Fannie Mae B3-4).
High Credit Score (720+)
Strong credit history. Fannie Mae Desktop Underwriter may approve DTIs up to 50% when combined with a 720+ FICO and other compensating factors (Selling Guide B3-6-02).
Minimal Payment Shock
New mortgage payment similar to or below current rent. Documented 12 months of on-time rent payments. FHA manual underwriting (4000.1 Section II.A.5.d) treats this as a primary compensating factor.
Significant Residual Income
Money left after all debts and living expenses. VA uses this as the controlling qualification metric (Pamphlet 26-7 Chapter 4 Table 6). For other loan types, high residual income can override DTI concerns.
How to Lower Your DTI Before Applying
Pay off the smallest debts first
A $3,000 credit card with a $90/month minimum reduces your DTI more per dollar spent than paying down a $30,000 student loan. Eliminating that $90/month frees up roughly $14,400 in mortgage capacity at the 43% operational ceiling per Fannie Mae B3-6-02 math.
Increase your documented income
Per Fannie Mae Selling Guide B3-3.1 (Income Verification), supplemental income must be documented for 24 months to count toward qualifying income. Start documenting overtime, bonus, freelance, or side income now if you plan to apply later.
Ask about debts with fewer than 10 payments remaining
Fannie Mae Selling Guide B3-6-05 allows lenders to exclude installment debts with fewer than 10 payments remaining from DTI. If your car loan has 8 payments left, ask if it can be excluded.
Be cautious with debt consolidation
Consolidating high-rate cards into a personal loan can lower monthly minimums (reducing DTI), but opening a new account affects your credit score per FICO scoring methodology. Do this 6+ months before applying to let the credit-score impact recover.