A bank-statement loan replaces tax returns with a deposit-based income calculation. Once you see the four steps, the program stops feeling like a black box — and you can estimate your own number before you ever apply.
Step 1 — Identify qualifying deposits
The underwriter starts with every deposit in the statement period, then removes the inflows that aren’t business income:
- Transfers between your own accounts
- Loan proceeds, credit-card advances, and refunds
- Gifts, tax refunds, and other one-time, non-business deposits
- For personal-statement programs, clearly personal inflows unrelated to the business
What remains is your qualifying deposit base — the money your business actually generated.
Step 2 — Apply the expense ratio
Deposits are gross revenue, so the lender reduces them by an expense factor to approximate net income. This is the number that most affects your result:
- Business statements typically use a larger factor — commonly around 50%, sometimes adjusted up or down based on your industry or a CPA letter attesting to your actual expense percentage.
- Personal statements use a smaller factor — often 10–20% — on the logic that business operating costs are paid from a separate business account.
If your real expenses are lower than the lender’s standard factor, a CPA letter documenting that can raise your qualifying income.
Step 3 — Average over the period
The adjusted total is divided by the number of months — 12 or 24 — to produce monthly qualifying income. The choice matters:
- A 12-month average rewards a strong recent year but lets one weak month swing the result.
- A 24-month average smooths seasonality and volatility, which can help lumpy earners qualify for more.
Step 4 — Run debt-to-income
That monthly income flows into a standard debt-to-income (DTI) ratio against your proposed housing payment and other obligations, exactly as a W-2 wage would. The documentation is unconventional; the ratio math is ordinary.
A worked example
| Step | Figure |
|---|---|
| Total deposits, 12 months | $480,000 |
| Less transfers & one-time inflows | −$30,000 |
| Qualifying deposit base | $450,000 |
| Expense factor (business, 50%) | −$225,000 |
| Annual qualifying income | $225,000 |
| Monthly qualifying income | $18,750 |
The same borrower’s tax return might show $95,000 of net profit. The bank-statement method nearly doubles the income the lender can use — not by inflating anything, but by measuring before the write-offs.
What strengthens the calculation
- Consistent deposits across the period read as durable income.
- Clean sourcing of large deposits avoids back-and-forth.
- Few or no NSFs/overdrafts support the healthy-cash-flow story.
- Separated accounts (business vs. personal) make qualifying deposits easy to identify.
Want a quick estimate of your own number? The bank-statement income estimator applies this same method to figures you enter.