Two business owners walk into the same loan. Same industry, same $50,000 a month landing in the bank, same credit, same house.

One qualifies on $50,000 a month of income. The other qualifies on $25,000.

Nothing about the businesses is different. What’s different is which set of statements got handed over, and what documentation came with them. That gap — a full 2x on the number that decides how much house you can buy — is the part of a bank statement loan almost nobody explains before you’re already in underwriting.

This page explains it. For the program parameters themselves — leverage, credit, loan size — see bank statement loans.

The one-sentence version

A bank statement loan doesn’t ask what you earned. It asks what came into your account, subtracts an assumed percentage for business expenses, and calls what’s left your income.

That assumed percentage is called the expense factor, and choosing it correctly is worth more than almost anything else in the file.

What the expense factor actually does

Nobody underwriting your loan is going to open your books. Instead, they take total eligible deposits and multiply by an assumed expense ratio — a stand-in for what it costs you to run the business. Whatever’s left is treated as your income.

A 50% expense factor on $50,000 of monthly deposits produces $25,000 of qualifying income. A 10% factor on the same deposits produces $45,000.

You didn’t spend a dollar differently. You just documented it differently.

The five paths, and what each one costs you

Here’s the range across current programs. These are maximums and minimums — where a specific borrower lands depends on the business, the documentation and the program.

How you document	Expense factor applied
Personal bank statements (plus two months of business statements)	None. 100% of eligible deposits count
1099 income	Fixed, as low as 10%
Business statements + CPA / EA / licensed tax preparer letter or P&L	As low as 10%, depending on program
Business statements, business-type schedule	As low as 20% for a service business with no employees
Business statements, standard treatment	50% — the default when nothing else is provided

Read that table again, because it contains the single most expensive default in non-QM lending. If you hand over business bank statements and nothing else, you are agreeing to have half your deposits deleted. That’s not a penalty. It’s just the number used when nobody has told the file anything more specific.

The personal statement path is the one people miss

If your business income reliably moves from the business account into your personal account, you may be able to qualify on the personal statements instead — and on that path there is typically no expense factor at all. Every eligible deposit counts.

The trade is documentation: you’ll generally need 12 or 24 months of personal statements plus about two months of business statements, and those business statements have to show real operating activity and visible transfers into the personal account. You’re proving the accounts are genuinely separate and that the money you’re pointing at is business income that already survived the expenses.

For a lot of self-employed borrowers who pay themselves a regular draw, this is the highest-income path available, and it’s the one that never comes up because they assumed “bank statement loan” meant business statements.

The business-type schedule

Some programs don’t apply a flat 50% — they set the factor by what you actually do and how many people you pay:

	No employees or contractors	1–5	More than 5
Service business	20%	40%	60%
Product business	40%	60%	80%

A consultant, a therapist, a solo agent, a contractor who subs nothing out — a service business with no payroll — can land at 20% rather than 50%. On $50,000 of deposits that’s $40,000 of qualifying income instead of $25,000.

The CPA letter is usually worth more than it costs

If your real expense ratio is genuinely below the standard factor, a letter from a CPA, an IRS Enrolled Agent, or a licensed tax preparer stating your actual expense percentage can replace the assumed one. Depending on the program, the floor goes as low as 10%.

The letter has to come from someone actively licensed who prepared or reviewed your recent returns, and the number has to be defensible — underwriting reviews the debit side of your statements to see whether the money going out actually matches the ratio being claimed. A 20% expense factor on an account where 60% of every month goes out to vendors will not survive.

But if the number is real, this is the highest-leverage few hundred dollars in the entire transaction.

Not every deposit is an eligible deposit

The other half of the math is what gets stripped out before the factor is even applied. Expect these to come out:

Transfers between your own personal accounts — moving your own money is not income
Credit card cash advances and business credit line draws — that’s borrowing, not revenue
Tax refunds
Gift funds
Product returns, refunds and credits — and any debit that reverses a deposit
Rental income — it comes out of the deposit pool and gets documented separately, typically at 75% of the lease
W-2 wages, retirement income, or anything already counted elsewhere — no double-dipping
Any deposit large enough to look unusual — commonly defined as one exceeding 100% of your average monthly sales. It doesn’t automatically die, but it has to be sourced, and if it can’t be, it’s gone

That last one catches good borrowers constantly. The equipment sale, the tax-year catch-up payment from a big client, the money you moved in to cover a slow month — each one has to be explained. Explained is fine. Unexplained is excluded.

Ownership percentage scales everything

You’re credited with deposits in proportion to what you own. Own 100% of the business, 100% of the eligible deposits are yours. Own 40%, you get 40%. Most programs want at least 25% ownership to use business statements at all — though sole proprietors filing a Schedule C are generally treated as self-employed without a separate ownership test. If your income arrives on 1099s rather than through a business account, the 1099 and P&L income path is usually the cleaner route.

12 months or 24 months?

Shorter isn’t automatically better and longer isn’t automatically safer.

If your business is growing, 12 months usually wins — it captures your current run rate instead of averaging it against a weaker prior year.

If your income is lumpy, 24 months can smooth a bad quarter into something that reads as stable.

Two things to know before you pick. On some programs the 24-month option qualifies you on the lower of the full 24-month average or the most recent 12 — so the longer look-back can’t be used to inflate a declining business. And on most programs a declining deposit trend triggers a written explanation of what happened, regardless of which period you chose. A 12-month option may also carry a pricing adjustment on some programs.

The details that quietly kill files

NSFs. Some programs cap it at three overdrafts in the last three months. A stretch of returned items can end a file that’s strong everywhere else. If you know that’s in your recent history, say so at the start — sometimes waiting two months is the whole fix.
Your most recent statement has to match. Underwriting compares the latest month against the qualifying average. If the average says $40,000 and last month was $9,000, expect questions.
Co-mingling. If you run business revenue and expenses through a personal account, that account gets treated as a business account — expense factor and all. The separation has to be real, not just intended.
Reserves. Typically 3 months of PITIA at or below 80% LTV, rising to 6, 9 or 12 months at higher leverage or larger loan amounts. On a cash-out refinance, the proceeds themselves can usually satisfy the requirement.

Where the program tops out

Once the income calculation is settled, the parameters are wide. These mirror the bank statement loan program page:

Up to 90% LTV on a purchase. Rate-and-term to roughly 85%, cash-out to roughly 80%
Loan amounts up to $20,000,000 on select portfolio scenarios; standard tiers run to $4,000,000
Credit from the low 600s at conservative leverage, with the best leverage and pricing at 680+
DTI considered up to roughly 55% on select programs, subject to credit score, leverage and residual income
12 or 24 months, personal or business statements
Primary residence, second home, and investment property — though for a pure rental, a DSCR loan often qualifies on the property’s rent instead and skips the deposit analysis entirely
30- and 40-year fixed, ARM, and interest-only structures on select programs

Every figure above is a maximum. They don’t all stack on one file, and the specific combination available to you depends on the whole picture.

What to do before you apply

Pull 12 and 24 months of both accounts and total the deposits yourself. You want to know your own number before anyone else calculates it.
Mark every deposit that isn’t revenue — transfers, refunds, credit line draws, that one large wire. Those come out.
Work out your real expense ratio. If it’s meaningfully below 50%, a CPA letter is probably the highest-return document in your file.
Check whether the personal statement path is open to you. If your draws are regular and the accounts are genuinely separate, it may skip the expense factor entirely.
Look at your last three months for NSFs before someone else does.

The honest summary

A bank statement loan is not a lower standard. It’s a different arithmetic — and unlike a tax return, the arithmetic has choices in it. Which statements you use, what documentation you attach, and which period you pick can move your qualifying income by a factor of two on identical deposits.

That’s why the structure matters more than the shopping. The difference between a good outcome and a declined file is usually not which lender you called. It’s whether anyone looked at the deposits before the file was submitted and picked the right path through them.

If you’re self-employed and you’d like someone to run the deposit math before it’s an application, that’s the conversation to have. You can get pre-approved or browse the full range of loan programs.

And if you’ve already been quoted on one structure and it doesn’t fit, that’s a fixable problem — see the program you were quoted isn’t the one you have to close.

Frequently asked questions

How is income calculated on a bank statement loan?

Total eligible deposits over 12 or 24 months are averaged monthly, an expense factor is applied to account for business costs, and the result is your qualifying income. On the personal statement path there is typically no expense factor at all.

What is an expense factor on a bank statement loan?

An assumed percentage of your deposits treated as business expenses. The standard treatment for business statements is 50%. With a CPA, Enrolled Agent or licensed tax preparer letter it can go as low as 10% on some programs, and a business-type schedule can put a service business with no employees at around 20%.

Do lenders use gross or net deposits for self-employed borrowers?

Neither exactly. They use eligible deposits — gross deposits minus transfers, refunds, credit line draws, gift funds and anything not genuinely business revenue — and then apply the expense factor to what remains.

Are personal or business bank statements better?

Personal statements often produce more qualifying income, because that path typically carries no expense factor. It requires that business income visibly flows into the personal account and that you can show about two months of business statements proving real operating activity.

Should I use 12 months or 24 months of statements?

Twelve if the business is growing, since it captures the current run rate. Twenty-four if income is lumpy and needs smoothing. Note that some programs qualify a 24-month file on the lower of the two averages, so the longer period won’t rescue a declining trend.

Can I get a bank statement loan if I have NSFs?

Sometimes. Some programs allow up to three in the last three months. If they’re recent and clustered, waiting a couple of months is occasionally the entire fix — worth checking before the file goes anywhere.

What credit score do I need?

Programs exist starting in the low 600s at conservative leverage. Meaningfully better leverage and pricing open up at 680 and above.

How much can I borrow?

Standard programs run to $4,000,000, with select portfolio scenarios up to $20,000,000. Maximum leverage reaches up to 90% LTV on a purchase, with lower ceilings on refinances.

Informational only and not a commitment to lend or an offer of credit. Program parameters shown are maximums; actual terms are determined at underwriting and not all applicants will qualify. Abo Capital, Company NMLS #1763084 · CA DRE #01167081 · FL MBR #MBR4882 · TX SML. Steve Abo, CDLP®, NMLS #358799. Equal Housing Opportunity.

How Lenders Calculate Income on a Bank Statement Loan