CPA Letter Change The Expense Factor On A Super Jumbo Loan — The Quick Read: Yes, on a bank statement loan. A CPA letter can override the default expense factor lenders apply to business deposits, which raises qualifying income. It has zero effect on a DSCR loan, because DSCR underwriting never looks at personal income or business expenses in the first place. Which product you’re using decides whether the letter even matters.
That distinction trips up a lot of high-net-worth borrowers shopping a super jumbo purchase or refinance. They hear “CPA letter” in one conversation and assume it applies everywhere. It doesn’t. Below is the actual mechanic, the exceptions, and where it fits — or doesn’t — into a super jumbo file.
Key Terms Defined
Expense factor — the percentage of gross business deposits a lender treats as overhead before counting the rest as qualifying income on a bank statement loan.
Bank statement loan — a mortgage program that qualifies a self-employed borrower using deposit history instead of traditional personal-income documentation.
DSCR loan — a business-purpose investment loan that qualifies primarily on whether a property’s rental income covers its payment, subject to lender guidelines, not on the borrower’s personal income.
Super jumbo — a lender overlay term for loan sizes well above standard jumbo limits; there’s no federal dollar line that defines it, so it varies by wholesale program.
P&L method — qualifying income based on a profit-and-loss statement instead of raw deposits, generally capped at a percentage of stated income.
PITIA — principal, interest, taxes, insurance, and association dues, the full monthly housing obligation a lender compares income against.
What Is An Expense Factor And Why Does It Exist?
An expense factor is a haircut. It’s the percentage of a business’s gross deposits that a lender assumes went to overhead — payroll, supplies, rent, whatever a business spends money on — before what’s left counts toward a borrower’s qualifying income.
There’s no regulator setting this number. That gap is why the expense factor exists at all — it’s a program-designed proxy, not a statute.
Across the wholesale programs Lendmire places files with, the default tiers typically run something like this: a service business with no employees usually gets a lighter default, a business with one to five employees a heavier one, and a business with six or more employees — or any business selling a physical product — the heaviest default. On most files those three tiers land around 20%, 40%, and 50% respectively, though the exact figure depends on the program and how the underwriter reads the business.
Personal-account deposits get treated differently. A personal account has usually already absorbed the business’s costs by the time money lands there, so it’s read closer to net income without the same tiered haircut.
Can A CPA Letter Actually Change That Number?
Yes — a CPA letter is the documented override to the default expense factor. On most bank statement files, it’s the single most consequential document a self-employed borrower can add. Instead of accepting the fixed tier for a business’s type and headcount, the borrower’s accountant certifies the business’s actual expense load. The underwriter uses that instead.
There’s also a middle path: a profit-and-loss statement, which typically caps qualifying income around 80% of stated deposits regardless of what the P&L shows. A CPA letter with no cap and a P&L with an 80% ceiling solve the same problem differently, and which one produces more qualifying income depends on the specific numbers.
What the letter looks like matters. Practitioner guidance on preparing these letters is consistent. It should stay strictly factual, describe what the underlying records actually show, and avoid speculative language about future income or approval odds. A vague or aspirational letter is more likely to get kicked back than accepted at face value (CPA Letter Services). The letter should verify the expense ratio against actual financial reporting. Its numbers should tie back to the statements or supporting records the CPA actually reviewed.
One detail that has nothing to do with the letter but changes the math anyway: transfers from a borrower’s own business account into a personal account count at 100%, not at whatever the business’s expense tier would otherwise apply. A CPA letter doesn’t touch this — it’s a separate rule that already works in the borrower’s favor.
Where This Fits On A Super Jumbo File
The expense factor question gets more consequential as the loan size climbs, because a better documented ratio can shift which leverage tier a file even clears. Across select wholesale programs, the size ladder runs from $300,000 to $6,000,000 on a portfolio non-QM bank statement program, and a separate bank portfolio program carries twelve-month-statement files up to $30,000,000 on its own tiered ladder — 65% to $5,000,000, 60% to $10,000,000, and 55% to $30,000,000, typically interest-only at 60% or the band’s ceiling, whichever is lower. Ability-to-repay rules require lenders to make a reasonable, good-faith judgment that a borrower can pay back the loan, but non-QM lending doesn’t specify exactly how that judgment gets made or what percentage of deposits should count.
Leverage on a primary residence steps down as size goes up. On most files in the $3,000,000 to $3,500,000 range, purchase and rate-term leverage tops out around 75%, generally requiring a credit score in the low 720s. Push into the $3,500,000 to $4,000,000 band and that leverage typically drops toward the low 70s with a tighter credit floor near 760. Above $4,000,000, every request goes through case-by-case review before it’s even submitted — there’s no flat published number at that size, and any figure quoted for that range should be read as a starting point for underwriting, not a guarantee.
A stronger, well-supported expense factor doesn’t change the leverage caps directly. But it can raise a borrower’s qualifying income enough to clear the debt-to-income threshold a tier needs. Sometimes that’s the difference between qualifying at a lower leverage tier and clearing a higher one. Credit floors also go up as loan size grows. Most programs use a 660 floor. That floor rises to 700 once a file crosses into super jumbo overlay territory. This is generally above $3,500,000 on a primary residence, or $3,000,000 on a second home or investment property.
Reserve requirements scale too — typically 3 months of PITIA at loan amounts up to $500,000, 6 months up to $1,500,000, and 9 months above that, plus additional months per financed property. A stronger qualifying-income figure from a well-documented expense factor can make reserves easier to clear, since some programs count residual cash flow into that picture.
Where This Question Doesn’t Apply At All
A CPA letter has no bearing on a DSCR loan’s math, full stop. DSCR files never calculate a personal repayment-capacity ratio — the underwriter compares the subject property’s rental income to its PITIA and stops there. Business expenses, payroll, deposit history, none of it enters the equation.
The closest DSCR analogue to an expense factor isn’t a borrower-side percentage at all. It’s the appraiser’s rent conclusion. Underwriters typically use whichever number is lower: the signed lease or the appraisal’s market-rent estimate. This is similar to how Fannie Mae’s rental income guidance describes the appraisal forms used to estimate market rent on investment properties. A strong lease doesn’t help a DSCR coverage ratio if the appraisal comes in soft. No amount of CPA documentation changes that. Form 1007’s scope is limited to the rent estimate itself, and it specifically excludes business expenses from the picture.
That means an investor sitting on a super jumbo purchase faces a real fork. Say they have strong business deposits, but the property’s rent won’t clear the desired coverage ratio. They can push the file through as a bank statement loan and let a CPA letter do its work on personal income. Or they can run it as a DSCR loan and accept that the property’s rent — not the borrower’s business — decides the outcome. Lendmire’s complete DSCR loans guide walks through how that property-level qualification actually works, if a pure rental purchase is the better fit.
DSCR loans are designed for non-owner-occupied investment properties. Because they’re business-purpose investor loans, they’re reviewed differently from a standard owner-occupied mortgage.
Edge Cases Worth Knowing
A few situations change the answer even within the bank statement lane:
- Commingled accounts still get business treatment. If personal and business spending run through the same account, underwriters typically classify the whole account as a business account and apply the expense factor accordingly. A CPA letter can still apply here, but it’s arguing against a harder starting classification.
- 1099 income skips the expense-factor question entirely. Gross 1099 earnings generally get no expense haircut at all, which can produce meaningfully higher qualifying income on the same dollars than a bank statement calculation would — a borrower choosing between documentation paths shouldn’t assume the CPA-letter route is automatically the stronger one.
- Cash-out proceeds above the super jumbo overlay line can’t satisfy reserve requirements. This is unrelated to the expense factor but frequently gets confused with it — expense-factor optimization only moves qualifying income, not the reserve rule itself.
- Asset-based paths sidestep the whole question. For borrowers whose deposits don’t tell the real income story, some programs allow qualifying on liquid assets divided by a set number of months instead — 36, 60, or 84 depending on the file — which makes the CPA letter conversation moot entirely.
One pattern shows up again and again in files at this size. Borrowers with strong six-figure-plus monthly deposits and a single-owner service business tend to get the biggest lift from a CPA letter. That’s because their default tier is already the lightest. The actual expense ratio a CPA can certify is often meaningfully lower than even that. Product-based businesses with heavier default tiers see real improvement too. But the letter has to work harder there, since the starting position assumes half of every deposit is overhead.
Related reading on this exact mechanic, including how the letter and P&L method interact: does a super jumbo bank statement loan need a CPA and how the expense factor and CPA letter shape P&L income.
Frequently Asked Questions
Does a CPA letter guarantee a lower expense factor?
No. It documents an actual figure for the underwriter to review, but the underwriter still decides whether that figure holds up against the supporting records and the business type. A vague or unsupported letter is likely to get rejected in favor of the default tier.
What’s the difference between a CPA letter and a P&L statement?
A CPA letter certifies an actual expense percentage with no fixed cap on most programs, while a P&L method typically caps qualifying income around 80% of stated deposits regardless of what the P&L shows. Which one produces more income depends on the borrower’s actual numbers.
Does the CPA letter help on a DSCR loan?
No. DSCR files qualify primarily on the property’s rental income covering its payment, subject to lender guidelines — personal income documentation, including anything a CPA certifies, doesn’t enter that calculation.
Do transfers from a business account get the expense factor applied?
No. Transfers from a borrower’s own business account into a personal account typically count at 100%, separate from whatever expense tier the underlying business would otherwise carry.
Does the expense factor matter more as loan size increases?
It can matter more on larger files. As leverage tiers tighten and debt-to-income room narrows, a stronger documented expense factor can shift which leverage tier or credit requirement a borrower clears, though every figure above roughly $4,000,000 goes through case-by-case underwriting rather than a flat published number.
If you’re weighing a bank statement approach against a DSCR purchase on a high-value property, Lendmire can help compare how each path treats the numbers based on the property’s income, the borrower’s credit profile, and the leverage the file needs to clear.
Tax treatment can depend on how the funds are used and how the property is held; investors should keep clear records and speak with a qualified tax professional before relying on any deduction.
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
Lendmire (NMLS# 2371349) is a mortgage brokerage built around DSCR investor lending, with programs available in 40 markets, including Washington, D.C. DSCR lenders commonly evaluate rental-income coverage instead of personal income paperwork — a practical fit for LLC-owned and multi-property investors. Terms vary by lender, property, leverage, and program. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.
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References
2. Fannie Mae Selling Guide — Rental Income (B3-3.1-08)
3. McKissock Learning — Form 1007 & Short-Term Rental Appraisals
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.
