This self-employed mortgage income calculator helps you estimate qualifying income two different ways: using tax returns or using bank statements. Lenders don’t just look at your bank balance — they average your income using specific formulas that depend on which documentation method you use. Enter your numbers below to compare both methods and see which one works better for your situation.
The calculator below walks through both underwriting approaches side by side, using the same add-backs and averaging rules most mortgage lenders apply to self-employed borrowers.
The tax return method starts with your net profit from Schedule C and adds back non-cash deductions like depreciation, depletion, and amortization, since lenders recognize these don’t represent real cash outflow. Home office deductions are added back too, while non-deductible meals and entertainment are subtracted. Most lenders average this figure over the two most recent tax years, though a documented income decline of more than 10% can allow the most recent year to be used alone. For a deeper walkthrough of qualifying with tax returns, see our self-employed mortgage guide.
Bank statement loans work differently. Instead of tax returns, lenders average 12 to 24 months of business deposits and apply an expense factor to estimate real income, since not every dollar deposited is profit. Our calculator uses a standard 50% expense factor, though businesses with lower overhead may qualify for a more favorable factor with certain lenders. This method is popular among business owners whose tax returns show lower income due to legitimate write-offs. Learn more about qualifying options on our self-employed loans page.
These calculations reflect underwriting concepts outlined in Fannie Mae’s Selling Guide for self-employed borrower income analysis, though every lender applies its own overlays.
The right method depends on how your tax returns compare to your actual cash flow. If your net profit after add-backs is strong and consistent, the tax return method often produces a higher qualifying income with fewer restrictions. If you write off a large percentage of your revenue as business expenses, or your bank deposits are significantly higher than your reported net profit, the bank statement method may qualify you for a larger loan amount.
Many self-employed borrowers run both calculations before choosing a loan program, since bank statement loans sometimes carry different rate and down payment requirements than conventional tax-return-based loans. Comparing both numbers side by side, as this calculator does, helps you go into a conversation with your loan officer already knowing which direction makes the most sense for your goals.
Lenders typically use one of two methods: averaging net profit from two years of tax returns with specific add-backs, or averaging bank deposits and applying an expense factor. This calculator lets you estimate both side by side so you can see which method produces a stronger qualifying income.
Not all deposits qualify. Transfers between your own accounts, loan proceeds, and one-time gifts are typically excluded. The remaining eligible business deposits are averaged monthly and reduced by an expense factor to estimate usable income.
Yes. If your most recent tax year shows a documented decline of more than 10% from the prior year, check the box in the Tax Return Method section to use the most recent year alone rather than a two-year average.
