Expense Factor On A Bank Statement Loan — The Quick Read: The expense factor is the percentage of your business bank deposits that a lender treats as operating costs before counting the rest as income. It only applies to business accounts, not personal ones. The typical default is 50%, meaning half of your deposits get treated as income and half as assumed expenses. A CPA letter can lower that number for businesses with genuinely lean overhead, and industry type can push it the other way.
If you run a business and your traditional personal-income documentation understate what you actually take home, this one number decides how much income a lender will use to qualify you. Get it wrong, and you’re either underselling your own borrowing power or setting up a file that won’t survive underwriting review.
What Exactly Is the Expense Factor?
The expense factor is a haircut applied to gross business deposits before they count as qualifying income. Lenders assume that money hitting a business bank account isn’t pure profit — some of it pays rent, payroll, vendors, and other overhead before it ever becomes income the owner can spend.
Here’s the mechanic in plain terms: a lender averages your monthly business deposits over 12 or 24 months, then applies a fixed percentage as the “expense” side of the ledger. What’s left is what counts toward your debt-to-income calculation.
Personal bank statements skip this step entirely. If you’re paid into a personal account, or if you transfer money from your own business into your personal account, that income is generally counted without an expense deduction. Across the wholesale programs Lendmire places files with, those direct owner-to-personal transfers count at 100%, because there’s no mixing of business overhead with the deposit.
This is why the choice between personal-account and business-account documentation matters so much. Same income, potentially very different coverage figure.
How Does the Math Actually Work?
Take total eligible business deposits, strip out anything that isn’t real income — like transfers between your own accounts, loan proceeds, or refunds — then average what’s left over the statement period. Apply the expense factor to that average, and the remainder is your qualifying monthly income.
Say a business shows steady average monthly deposits after excluding non-income items. If the file uses a 50% expense factor, half of that average becomes qualifying income. If a CPA certifies a lower factor because the business genuinely keeps more of what comes in, more of that same deposit average counts. Same deposits, different qualifying income, purely because of which factor applies.
Across the network of programs Lendmire works with, the fixed-ratio menu generally follows a tiered structure. It scales with staffing levels and business type. Lean service businesses with few employees get lower ratios. Larger staffed operations or product-based businesses get higher ratios. If the fixed tiers don’t fit the business, there are two other paths: an accountant-provided ratio, or a profit-and-loss method (capped around 80%).
Why Does the Expense Factor Even Exist?
Lenders can’t verify a business’s true profit margin from a bank statement alone, so they build in a standard assumption instead of guessing. A bank statement shows cash moving in and out — it doesn’t show what’s payroll, what’s rent, and what’s actually left over for the owner.
Rather than manually reconstructing a business’s books from thousands of transaction lines, most non-QM programs default to a flat assumption and let the borrower prove a better number if one exists. It’s a shortcut that favors the lender until the borrower brings documentation that says otherwise.
Who Can Lower the Default Factor — and How Low Can It Go?
A CPA, enrolled agent, or qualifying tax preparer can certify a lower actual expense ratio. Across most wholesale non-QM programs, that floor sits meaningfully above zero — the certified number still has to reflect a plausible cost structure for the business. Self-certification by the borrower doesn’t count. It has to come from a third party who prepares or reviews the business’s finances.
This CPA letter is the single highest-leverage document in a bank statement file. A lean, one-person service business with minimal overhead has a real case for a lower certified ratio than the 50% default. A product-based business with inventory, staff, and physical overhead has a much weaker case, and an underwriter reviewing the file will expect the certified ratio to reflect that reality.
That’s also where files get flagged. Loan-level review data has shown real cases where a lender applied a service-business ratio to what was actually a product business with employees — a mismatch between the certified factor and the business type it’s supposed to represent. Getting the ratio right for the actual business, not just picking the lowest available number, is what keeps a file clean.
Does Every Lender Use the Same Default?
No. Lenders set the expense factor themselves — it’s not a fixed industry rule. So two lenders can look at the same business and come up with different qualifying income figures. Some programs use higher default numbers for expense-heavy industries like restaurants. They know these business types usually carry higher overhead, no matter how lean the owner runs things.
This is exactly why shopping the file across more than one program matters. Across the wholesale lenders Lendmire works with, the fixed-ratio tiers and the CPA-letter path both exist side by side — and the strongest outcome usually comes from matching the business type to the program built for it, not just taking whatever the first lender offers.
Business Statements vs. Personal Statements — Which Wins?
Personal statements skip the expense factor. But that doesn’t automatically make them the better path. Say your income only shows up cleanly in a business account — through invoices, client payments, or revenue that never gets pulled into a personal account. In that case, the expense-factor route on business statements may produce a higher usable income than trying to force the file onto personal statements alone.
The better path depends on where the money actually lands and how cleanly it can be documented. Say a business owner consistently transfers profit into a personal account every month. That person may qualify more easily using personal statements. But if revenue sits almost entirely in the business account, with irregular owner draws, it’s usually better to document the business account and work the expense factor down with a CPA letter.
Does the Expense Factor Apply to DSCR Loans?
No — DSCR loans don’t use an expense factor at all, because they don’t qualify off the borrower’s personal or business income in the first place. A complete DSCR loans guide walks through the full mechanics, but the short version is that these loans qualify primarily on property-level rental income covering the payment, subject to lender guidelines.
DSCR underwriting doesn’t average bank deposits. Instead, it looks at the property’s rent relative to its monthly obligation. Appraisers document that rent using standardized forms — Form 1007 for single-family and condo rentals, and Form 1025 for two-to-four-unit income properties. There’s no owner income review, no expense ratio, and no business-versus-personal account question.
This is a real fork for self-employed investors. If your traditional personal-income documentation or bank deposits create a messy or discounted income picture, and the property itself cash flows well, a DSCR loan sidesteps the entire expense-factor conversation. If you’re buying a property with a coverage ratio around or below 1.00, sub-1.00 programs exist through select lenders in the network — though leverage and terms adjust when coverage runs thin.
What Does This Look Like for a High-Net-Worth Borrower?
Across the wholesale network Lendmire works with, self-employed high-net-worth borrowers use bank statement programs sized from $300,000 up to $30,000,000 through two separate paths — a portfolio non-QM program carrying files to $6,000,000, and a bank portfolio program that runs 12-month-statement files up to $30,000,000 on its own leverage ladder. On a primary residence, leverage steps down as the loan size climbs: up to 90% at the smaller end, stepping to 85%, then 80%, with the top credit tier reaching 75% around the $3-4 million mark, and case-by-case review above that. Second homes and investment properties generally run about five points lower at every size tier.
Credit typically needs to clear a 660 floor on the standard portfolio program, rising to a 700 floor above the super-jumbo line. Debt-to-income can run as high as 50% on most files, and reserve requirements typically scale from three months up through nine months as loan size increases. Every figure above $4,000,000 gets reviewed case by case before it’s ever submitted — that’s not a formality, it’s how these files actually move through underwriting at that size.
One pattern shows up constantly across bank statement files in this network: business owners assume the expense factor is fixed and non-negotiable, then leave real qualifying income on the table because they never bring a CPA letter. The strongest files pair the right account type — business or personal — with a CPA letter tuned to the actual business, not just the lowest number a preparer will sign.
Key Terms Defined
Expense factor (expense ratio): The percentage of business bank deposits a lender assumes are operating costs, subtracted before the remainder counts as income.
Bank statement loan: A non-QM mortgage that qualifies a borrower using bank deposit history instead of traditional personal-income documentation.
Non-QM (non-qualified mortgage): A loan that doesn’t meet the specific criteria of a Qualified Mortgage, giving lenders flexibility on how they verify income.
DSCR (debt service coverage ratio): A ratio comparing a rental property’s income to its monthly debt obligation, used to qualify investment-property loans instead of personal income.
Qualifying income: The monthly income figure a lender actually uses to calculate your debt-to-income ratio, after any deductions like the expense factor are applied.
Bank statement lending overlaps with DSCR territory more than most borrowers realize — for a side-by-side look at which fits a given deal, DSCR vs. bank statement loans for investors breaks down the decision point.
Non-QM performance data has drawn scrutiny lately. Scotsman Guide reported an industry-wide impairment rate near 7.4%, and bank statement loans are among the segments showing the most stress. This is why underwriters scrutinize expense-factor documentation closely. They won’t just accept borrower-provided numbers at face value.
Frequently Asked Questions
Can I choose my own expense factor? No. You can’t self-certify a lower ratio — it has to come from a CPA, enrolled agent, or qualifying tax preparer who reviews or prepares the business’s actual financials. Self-selecting a favorable number without third-party backing gets flagged in underwriting.
Does a higher expense factor always hurt me? Yes, in the sense that it reduces qualifying income, but it also reflects the real cost structure of certain businesses. A restaurant or product business genuinely carries more overhead than a solo consultant, so a higher factor for that business type isn’t arbitrary — it’s closer to reality.
What if my business has no employees and low overhead? That’s exactly the profile where a lower fixed ratio or a CPA-certified figure tends to make the most sense. Across the network Lendmire works with, service businesses with no employees often sit at the lower end of the fixed-ratio tiers rather than the default used for staffed or product-based operations.
Should I use business or personal bank statements to qualify? It depends on where your income actually lands and how consistently. If profit reliably transfers from your business account into a personal account, personal statements may qualify more cleanly; if income sits mostly in the business account, documenting that account with a strong CPA letter is usually the better route.
Is a DSCR loan a way around the expense factor entirely? Yes, but only because DSCR loans qualify off the property’s rental income, not your personal or business bank deposits at all. If the property’s rent supports the payment, the expense-factor conversation doesn’t apply — though qualification still runs through lender guidelines, credit, and property review.
If you’re weighing whether a bank statement program or a DSCR loan fits your next purchase or refinance, Lendmire can help you compare options based on your income documentation, credit profile, leverage needs, and investment goals — reach out at 828-256-2183 or request a quote.
For current guidelines and terms, see Lendmire’s super jumbo bank statement loan programs page.
About Lendmire
Lendmire (NMLS# 2371349) is a DSCR-focused mortgage broker that helps arrange investor financing across 40 markets, including Washington, D.C., through wholesale and investor-lending channels. DSCR eligibility is generally reviewed by the lender around the property’s rental income rather than personal income documentation, subject to lender guidelines — which works for self-employed investors, LLC operators, and portfolios above four financed properties. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.
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References
1. McKissock Learning – Form 1007 & its Impact on Short-Term Rental Appraisals
2. Scotsman Guide – Warnings flash in the low-doc, low-credit-score, high-LTV corner of non-QM lending
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
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Legal disclosures. Lendmire (NMLS# 2371349) is a state-licensed mortgage brokerage that arranges financing through wholesale lender relationships. Lendmire is not a direct lender, depository institution, or registered financial advisor. The discussion above is general informational content about real estate financing — it is not financial, legal, or tax advice, and readers should consult licensed professionals for guidance on their individual circumstances. Loan inquiries are subject to lender underwriting; this article does not represent a commitment to lend. Loan terms, rates, and qualification standards vary by borrower, property, and state, and are subject to change at any time. Equal Housing Opportunity. NMLS Consumer Access: nmlsconsumeraccess.org.
