Self-employed guide
Self-employed vs W-2: how debt-to-income is calculated differently
Debt-to-income ratio, or DTI, is the same basic formula for everyone: total monthly debt payments divided by gross monthly income. The formula doesn't change for self-employed borrowers. What changes is how the "income" side of that equation gets calculated, and that difference is often what catches self-employed buyers off guard.
W-2 income is simple: gross pay, verified
For a salaried employee, a lender takes gross pay from recent pay stubs and W-2s, verifies it with the employer, and uses that figure directly. There's little interpretation involved. If you earn $8,000 a month gross, that's the number used in the DTI calculation.
Self-employed income requires a calculation, not a lookup
For a self-employed borrower, there's no pay stub to reference. Instead, underwriters calculate qualifying income from your tax returns, typically averaging two years of net income, then dividing by 12 to get a monthly figure. This is where the gap opens up: your bank account might show $10,000 a month moving through, but if your tax returns show $60,000 in net income for the year after deductions, your qualifying income is $5,000 a month, not $10,000.
Why this makes self-employed DTI look worse on paper
Because write-offs lower your taxable net income, they also lower the income figure used in your DTI calculation, even though your actual cash flow might comfortably support a mortgage payment. Two people with identical real-world spending power, one salaried and one self-employed with heavy write-offs, can show very different DTI ratios to a lender, purely because of how their income is documented.
What counts as debt is the same for both
Car loans, student loans, credit card minimums, and other recurring debts count the same way regardless of employment type. The new mortgage payment, including principal, interest, taxes, insurance, PMI, and HOA dues, is added to this total. Use the calculator to see your full estimated payment, then add your other monthly debts and divide by your calculated qualifying income (not your gross revenue) to estimate your real DTI.
Ways self-employed borrowers can improve their DTI on paper
Paying down or paying off existing debts before applying has an immediate, direct effect. Some borrowers also work with their CPA in the year or two before a purchase to balance legitimate tax savings against the effect heavy write-offs have on mortgage-qualifying income, since the two goals can pull in opposite directions.
Frequently asked questions
What DTI ratio do most lenders want to see?
Many conventional lenders prefer a total DTI under about 43-45%, though the exact ceiling varies by loan program, credit score, and down payment. Lower is generally safer for approval.
Does business debt count toward my personal DTI?
Generally, debt held solely in the business's name, with no personal guarantee, is typically excluded. Debt you personally guarantee, or that's in your personal name, usually does count. This varies by lender, so confirm directly for your situation.
Can I lower my DTI by paying off a car loan before applying?
Yes, paying off or significantly paying down an installment debt before applying can meaningfully lower your DTI, since that monthly payment is removed from the calculation entirely.