What's a good debt-to-income ratio for a mortgage?
Under 36% back-end is the classic benchmark and gets you the best pricing on conventional loans. The CFPB's qualified-mortgage rule sets a 43% ceiling for most conventional approvals, and FHA can go to about 57% with strong compensating factors like high credit scores or large reserves. Below 20% is considered excellent.
Is DTI based on gross or net income?
Always gross — your income before taxes, 401(k), and health-insurance deductions. For W-2 employees, that's annual salary ÷ 12. For self-employed borrowers, lenders typically average two years of net business income from Schedule C, K-1, or corporate returns. Using net pay will make your DTI look 20%–30% worse than what the lender actually computes.
What counts as a debt for DTI purposes?
Any recurring obligation that shows on your credit report: mortgage or rent, auto loans and leases, student loans, credit-card minimum payments, personal loans, HELOC payments, co-signed debts, and court-ordered alimony or child support. Business debts that you've personally guaranteed may also count.
Do utilities, phone bills, or groceries count?
No. DTI only includes contractual debt payments reported to the bureaus. Utilities, mobile-phone plans, streaming subscriptions, groceries, standalone health-insurance premiums, and gym memberships are excluded. They matter for your personal budget but not for the lender's qualification math.
How do I lower my DTI quickly?
The fastest moves are paying off small revolving balances to eliminate minimum payments, refinancing high-payment debts to longer terms, avoiding any new credit applications for 60–90 days before underwriting, and adding a co-borrower whose income raises the denominator. Even closing a $50 minimum changes your back-end ratio measurably on a $6,000 income.
What if I'm self-employed?
Lenders calculate income from two years of tax returns, not from gross receipts or bank deposits. They start with net profit on Schedule C (or K-1 ordinary income for S-corps and partnerships), add back depreciation and other non-cash deductions, then divide by 24 to get a monthly figure. If you write off heavily, your qualifying income for DTI will be much lower than what your bank statements show.
How is DTI different from credit utilization?
DTI compares monthly debt payments to monthly income, so it measures cash-flow capacity. Credit utilization compares revolving balances to credit limits and feeds your credit score. A borrower with maxed-out cards can still have a moderate DTI (if the minimums are small), and a borrower with a clean utilization profile can still have high DTI if their auto and mortgage payments are large.
Do deferred or income-driven student loans count?
Yes. Fannie Mae and Freddie Mac require lenders to use the documented monthly payment, or if zero, 1% (Fannie) or 0.5% (Freddie) of the outstanding balance as a hypothetical payment. FHA uses 0.5% if the statement payment is $0 or less than 0.5% of the balance. Use that imputed figure in the student-loan field for a realistic estimate.
Does a higher down payment lower my DTI?
Indirectly. A larger down payment reduces the loan amount, which reduces the monthly principal-and-interest payment and therefore both front-end and back-end DTI. It also removes PMI when you cross 20%, dropping the housing payment further. It doesn't change your income side, but it's one of the most powerful levers when DTI is the binding constraint on approval.
Does the calculator know my exact lender's overlay rules?
No — it applies the standard CFPB qualified-mortgage threshold (43%) and the classic 28/36 benchmarks. Individual lenders apply overlays on top of the agency guidelines (Fannie Mae, Freddie Mac, FHA, VA, USDA), and credit score, reserves, and loan-to-value all affect the final DTI cap. Use the result as a strong indicator, not a guarantee of approval.
