Win A Lower Expense Factor On A Service-business — The Quick Read: A bank statement loan turns your deposits into qualifying income after subtracting an assumed cost of running the business — the expense factor. Service businesses with no employees often start at a much better factor than a product-based company, and a CPA letter or better account structure can push it lower still. Get the factor down, and your qualifying income — and your buying power — goes up. Get it wrong, and an underwriter defaults to a much harsher number.
This isn’t a rate story or a speed story. It’s a documentation story, and the documentation decides the loan amount.
Key Takeaways
- The expense factor is the percentage of your deposits an underwriter assumes went to overhead before anything counts as your personal income.
- Service businesses with no employees often start lower than product-based or staff-heavy businesses on most files.
- A CPA letter can override a fixed ratio entirely — but only if it’s tied to the same months as your statements.
- Personal-account deposits often skip the haircut altogether, which changes the whole calculation for solo operators.
- Loan amounts through select wholesale programs run from $300,000 to $30,000,000, though anything above $4,000,000 gets reviewed case by case before submission.
What Is An Expense Factor, And Why Does It Move The Loan Amount So Much?
The expense factor is a haircut applied to your average monthly deposits before a lender counts any of it as qualifying income. It exists because bank statement loans skip traditional personal-income documentation. Lenders still need a defensible way to separate business overhead from money that’s actually yours.
The market default sits at 50%, according to Scotsman Guide, which describes how non-QM lenders calculate income for a self-employed borrower who can’t produce a W-2. That means half of every dollar deposited gets treated as overhead before your qualifying income is even calculated.
Across select programs in Lendmire’s wholesale network, the starting point for a service business is often better than that. Files with no employees are often treated with a somewhat lower factor, though this varies by lender and file, according to the same Scotsman Guide overview cited above. Add staff, and the ratio tends to move higher for a handful of employees, and higher still once a business runs a larger headcount or sells a physical product. The gap between the lowest and highest factors is the entire game — it can be the difference between qualifying income that’s meaningfully higher or lower on the exact same deposit total.
Key Terms Defined
Expense factor — the percentage of gross deposits an underwriter subtracts as assumed business overhead before calculating your qualifying income.
Bank statement loan — a non-QM mortgage that qualifies a self-employed borrower using 12 or 24 months of bank deposits instead of traditional personal-income documentation.
Non-QM — a mortgage that doesn’t meet the documentation standards of a Qualified Mortgage, but is still subject to the federal consumer-finance regulator’s repayment-capacity rule requiring a lender to reasonably determine you can repay the loan.
CPA letter — a written statement from a credentialed accountant or tax preparer certifying your actual operating-expense ratio, used to override the fixed default factor.
Qualifying income — the number a lender actually uses to size your loan, calculated as eligible deposits divided by the number of statement months, after the expense factor is applied.
The Setup: How A Service Business Gets Classified
Classification happens before any math runs, and it decides which factor applies before an underwriter even opens your statements. A consultant, attorney, financial advisor, or freelance designer with no staff and no inventory sits at the low end of the spectrum. Add payroll, a lease, or physical goods, and the factor climbs.
This is where mixed businesses get tricky. A business that both sells a product and bills for labor — a repair shop is the classic example — can land in either bucket depending on how the lender reads the revenue mix. If most of the deposit history clearly reads as service billing rather than product sales, that’s worth documenting up front, not discovering after an underwriter defaults you to the higher ratio.
Ownership matters too. Business account statements generally need at least 25% ownership in the entity before they count at all. Below that threshold, the statements typically don’t qualify as usable income documentation on most files.
The Mechanics: Step By Step
Step one — pick the lookback window. Most files run on 12 or 24 consecutive months of statements. Some bank-portfolio programs use a straight 12-month window. Statements have to be consecutive; a transaction history from your bank’s app usually won’t substitute.
Step two — separate personal from business. Personal account deposits are generally read closer to face value, without the same overhead haircut. Business account deposits get the expense factor applied because gross revenue commingles overhead with take-home pay. If your business income flows into a personal account as owner draws, that path can already avoid the haircut before you do anything else.
Step three — let the fixed ratio apply first. On most files, a no-employee service business starts around 20%. That’s already well below the 50% market default. If your real costs run close to that number, this step may be the whole strategy — no extra documentation needed.
Step four — bring in the accountant if the fixed ratio isn’t low enough. A CPA, enrolled agent, or qualified tax preparer can certify an actual expense ratio that’s lower than the fixed default, based on your real books. When accepted, that documented number replaces the fixed ratio and directly raises your qualifying income. The letter has to cover the same time period as your bank statements — a mismatch in dates is one of the fastest ways to get a letter rejected outright.
Step five — consider the profit-and-loss route instead. A P&L-based income calculation is available on many files, though it’s typically capped at 80% of the stated profit figure being counted as usable income, regardless of how low the underlying expense ratio looks. This route works best when your books are clean enough to support a P&L, but you don’t want to run the full deposit-analysis math.
Step six — count transfers correctly. Money moved from your own business account into your personal account typically counts at 100% on most files — no expense factor applied a second time. That matters if you’ve been sweeping owner profit into a personal account monthly; it’s already been through the business-side haircut once, and shouldn’t get haircut again on the personal side.
The CPA Letter: What Actually Moves The Number
The single biggest lever in this whole process is whether a credentialed professional puts a specific number in writing — not you, and not a spreadsheet you built yourself. A self-prepared profit-and-loss statement generally carries far less weight in underwriting than a signed letter from a CPA or enrolled agent covering identical months.
What the letter needs isn’t complicated, but it’s specific: the exact expense ratio, the exact time period matching your bank statements, and language tying that ratio to the business’s actual books rather than an estimate. A vague letter that says “expenses are low” without a number attached typically doesn’t move anything. Lendmire has more detail on how to structure this specific ask in its piece on using a CPA letter to lower your expense factor.
One caution worth stating plainly: a federal indictment in Florida involved a borrower accused of misrepresenting cash flow specifically to meet bank statement loan underwriting requirements. That’s not a reason to avoid documentation. It’s a reason the certified ratio has to reflect real books, not a number chosen to hit a target loan amount. A CPA letter is a professional certifying reality — not a negotiating tactic.
Personal Account Deposits: The Other Lever
Personal-statement programs skip the expense-factor haircut for many borrowers, on the theory that money already sitting in a personal account has cleared the business side of the ledger. For a solo consultant or advisor who routes net profit — not gross revenue — into a personal account, this path can outperform the business-account math without a CPA letter at all.
Here’s the tradeoff: this only works cleanly when the deposits genuinely represent take-home income — not gross client payments that still need to cover overhead. Take a contractor whose account shows subcontractor pass-through, where money arrives and immediately goes back out to crews. That contractor usually needs the opposite treatment. Lenders often exclude those pass-through deposits from the average entirely, or apply a higher effective factor, rather than a lower one.
Deposits run through a merchant processor add a similar wrinkle. A processor statement shows gross sales, fees, and chargebacks all together. Underwriters sometimes apply the expense factor against that gross figure rather than the net deposit that actually hit the account. Which base the factor applies to can change the qualifying-income outcome meaningfully. So it’s worth confirming this before assuming the lower business-account ratio automatically applies.
For a broader look at how this whole mechanic works across different account types, Lendmire’s guide on how the expense factor works on a bank statement loan walks through the calculation in more depth.
Where This Can Go Wrong
The most common mistake is treating a self-prepared P&L as equivalent to a CPA letter. It isn’t, and underwriters generally weight the two very differently. The second most common mistake is chasing a lower factor when the real cost savings barely move the number — if actual overhead already sits near the fixed default, paying for third-party certification adds cost and delay without meaningfully changing the outcome.
Industry data suggests underwriting on bank statement income has been a soft spot in recent loan performance. HousingWire reports that weaker performance on bank statement underwriting has been flagged as a factor in rising delinquencies across 2022–2024 vintages, even as 2025-vintage loans performed better after lenders tightened their credit boxes. The practical takeaway: aggressive, thin, or poorly documented expense ratios face more scrutiny today than they did a few years ago, not less.
There’s also a documentation trap worth naming directly. Schedule C tax categories show what you deducted for tax purposes — that’s a different question from what a bank-statement underwriter treats as real operating cost. The IRS instructions for Schedule C use the same expense-line structure for every industry, but which lines matter most varies by business. Vehicle expense dominates for a driver, supplies for a maker, professional fees for a consultant. A common mistake is pulling your tax-return expense ratio and assuming it equals your bank-statement expense factor. The two numbers are related, but they aren’t the same calculation.
Who This Strategy Fits — And Who It Doesn’t
This approach fits a solo or small-team service provider well — consultants, attorneys, financial advisors, healthcare practitioners, agency owners — whose real overhead runs meaningfully below what a fixed ratio assumes. It’s a strong option for someone buying or refinancing a primary residence, or a second home, using qualifying income drawn from their own business.
This approach fits less well for a business with real payroll, inventory, or a physical footprint. For those businesses, a higher fixed ratio is probably closer to reality anyway. And it’s the wrong tool entirely for an investor buying or refinancing a rental property rather than qualifying off personal business income. DSCR loans qualify primarily on the property’s own rental income covering the payment, subject to lender guidelines — bypassing the expense-factor mechanic altogether. Lendmire’s complete DSCR loans guide explains how that qualification path works for investors who’d rather keep their personal deposits out of the file entirely.
An investor juggling both — a primary-residence purchase on bank statement income and a rental acquisition on DSCR — will only run into the expense-factor question on the bank statement side. Across select wholesale programs in Lendmire’s network, sizes on the bank statement side of the ledger run $300,000 to $30,000,000, with credit typically starting around a 660 floor on portfolio programs (680 on bank-portfolio programs, 700 above the super-jumbo threshold), debt-to-income up to 50%, and reserves generally running 3 months on smaller balances up to 9 months on larger ones — every figure reviewed on a file-by-file basis and never a commitment to lend.
This is general information, not legal or tax advice. Anyone relying on an expense ratio, a CPA letter, or a P&L for loan qualification should confirm the specifics with a qualified accountant or attorney familiar with their own business structure.
Frequently Asked Questions
Does a lower expense factor always mean a bigger loan?
Usually, yes — a lower factor raises qualifying income, which typically raises maximum loan size and improves debt-to-income headroom. But the effect is only meaningful if the gap between your current factor and the lower one is large; shaving a few points off an already-low ratio rarely moves the needle much.
Can I use both a CPA letter and personal account deposits?
Often, yes, on files where the business shows both business-account and personal-account activity. Which combination produces the better outcome depends on how income actually moves through the accounts, so it’s worth running both scenarios before choosing which documentation path to submit.
What if my CPA won’t certify a specific ratio?
Then the fixed default ratio applies instead — 20%, 40%, or 50% depending on employee count and business type on most files, or the profit-and-loss method, typically capped around 80% of stated profit. A CPA letter is an upgrade path, not a requirement.
Does a new business qualify for a lower factor the same way?
Newer businesses generally need enough consecutive statement history — 12 or 24 months — to establish a deposit pattern in the first place. Without that history, the fixed ratios and CPA-letter path may not have enough data to apply cleanly.
Is this the same process for an investment property purchase?
No. Investment-property purchases generally route through DSCR underwriting, which drives lender review against the property’s rental income rather than the borrower’s personal or business deposits, so the expense-factor mechanic typically doesn’t apply there.
If you’re weighing a primary-residence bank statement loan against qualifying an investment purchase on rental income instead, Lendmire can help compare how each path prices out based on the property, the documentation available, and your broader goals.
For current guidelines and terms, see Lendmire’s super jumbo bank statement loan programs page.
Self-employed borrowers can compare both super jumbo programs on Lendmire’s self-employed mortgages page.
About Lendmire
As a DSCR and non-QM mortgage broker, Lendmire — NMLS# 2371349 — connects investors with wholesale lending channels across 40 markets, including Washington, D.C. The property’s rental income, not the borrower’s tax returns, is central to lender review, which works for self-employed operators and portfolios beyond four financed properties. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.
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References
1. Scotsman Guide – Rev Up the Engine for Non-QM Lending
2. Consumer Financial Protection Bureau – Ability-to-Repay Rule
3. HousingWire – Non-QM Originations Set to Reach $175B in 2026
4. IRS – Instructions for Schedule C (Form 1040)
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
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Disclosures. The information presented in this article is general market commentary, not financial, legal, or tax advice. Lendmire is a mortgage brokerage (NMLS# 2371349) — not a direct lender or depository institution — and loan placement is subject to lender underwriting. Nothing in this content represents a commitment to lend. Loan terms, pricing, and program availability vary based on borrower qualifications, property characteristics, and state of subject property, and are subject to change at any time. Lendmire complies with Equal Housing Opportunity requirements. Consumer access: nmlsconsumeraccess.org.
