Can A CPA Letter Cut The Expense Factor On A Super Jumbo Loan — The Quick Read: Yes, on a bank-statement loan, a CPA letter can replace a lender’s default expense assumption with a lower, documented number — which raises qualifying income. It does not touch a DSCR loan’s coverage ratio, because DSCR math runs on the property’s rent, not the borrower’s bank deposits. And above a certain loan size, no letter changes the credit floor, seasoning, or reserve rules that come with a super jumbo file.
That’s the short version. The long version is where investors actually get tripped up, because “expense factor” and “DSCR” get used almost interchangeably in casual conversation — and they’re two entirely different calculations serving two entirely different loan products.
Key Terms Defined
Expense factor (or expense ratio): the flat percentage a lender subtracts from business bank-account deposits to estimate what’s left over as personal income, since a business account’s deposits are gross revenue, not profit.
CPA letter: a signed statement from a licensed CPA or tax preparer documenting a borrower’s actual business expense ratio, used to override a lender’s default assumption when the real number is lower.
Bank-statement loan: a mortgage that qualifies a self-employed borrower off 12 or 24 months of bank deposits instead of traditional personal-income documentation.
DSCR loan: a loan qualified primarily on property-level rental income covering the payment, subject to lender guidelines — not on the borrower’s personal or business bank deposits at all.
Super jumbo: industry shorthand for a loan size well above standard jumbo pricing tiers; there’s no statutory dollar line that defines it, so where it starts depends on the lender.
How The Expense Factor Actually Works
The mechanism is simple: a lender can’t read a business owner’s full books from twelve months of bank statements, so it uses a flat percentage instead. Scotsman Guide describes the underlying logic plainly — a lender can approve a loan for a business owner by averaging monthly deposits and applying an expense ratio, with roughly half of gross deposits treated as overhead by default.
Across the wholesale programs Lendmire places files with, that expense-ratio structure typically breaks into tiers rather than one flat number. A service business with no employees usually gets the most favorable treatment, generally sitting toward the lower end of the range. A business running a small handful of employees typically lands somewhere in the middle of that range. A business with a larger staff, or any business that sells a physical product, usually defaults to the higher end of the range — the same ceiling the trade press cites as the industry starting point. There’s also an accountant-provided ratio option and a profit-and-loss path, which is generally capped well below the full deposit amount rather than left open-ended.
Here’s why the tiered structure matters more than people assume: a solo consultant with almost no overhead gets punished by a flat 50% assumption just as much as a business that genuinely spends half its revenue on payroll and inventory. That’s the exact gap a CPA letter is built to close.
What The CPA Letter Actually Changes
A properly prepared CPA letter can move a borrower out of the default tier and into a documented, lower expense ratio — which increases qualifying income from the same deposit base. Say a service-based consultant is sitting at the default 50% assumption on a large deposit base. If a CPA-signed letter documents that the business genuinely runs closer to a 20% expense ratio, qualifying income from those same deposits jumps meaningfully — often enough to change what loan size the file can actually support.
That’s the whole trick. Nothing about the borrower’s actual cash flow changed. What changed is the lender’s willingness to believe the real number instead of the flat assumption.
But the letter has to earn that trust. It isn’t a borrower’s CPA writing a short note asserting a number — underwriters expect the letter to identify the correct business type, address the actual expense ratio (not just hand over a generic income statement), and carry a date that’s reasonably fresh relative to closing. A letter built for a six-employee retail operation that gets applied to a solo consulting practice — or vice versa — tends to get kicked back for correction before it does any good.
Deposit patterns matter too. Say a business account shows constant round-number transfers back and forth with the personal account. An underwriter may start to question whether the accounts are genuinely separate. This undercuts the whole argument for a lower business-specific ratio in the first place. And consider a contractor whose account shows subcontractor pass-through payments — money that arrives and immediately flows back out to crews. That contractor may actually need a higher effective ratio applied. Or those deposits might need to be excluded from the average entirely. Either way, they shouldn’t get any override.
Where This Runs Into Super Jumbo Sizing
This is the part most borrowers miss: a CPA letter changes the income number, but it doesn’t touch the separate set of rules that kick in once loan size crosses into super jumbo territory. Across the network programs Lendmire arranges, the two live on completely different tracks.
On the documentation side, files run on 12 or 24 consecutive months of statements, and business accounts generally need at least 25% ownership by the borrower to count. Transfers the borrower moves from their own business account into a personal account typically count at full value — they don’t get run through the expense ratio a second time.
On the sizing side, loan amounts through select wholesale programs run from roughly $300,000 up to $6,000,000 on a portfolio non-QM bank-statement structure, with a separate bank portfolio program carrying twelve-month-statement files as high as $30,000,000 on its own leverage ladder — 65% at the lower end of that range, stepping down to 60% and eventually 55% as the loan size climbs, with interest-only capped at 60% or the band’s own ceiling, whichever is lower.
Leverage on a primary residence steps down as size goes up. On most files, that looks like roughly 90% at the smaller end near $1,000,000, tightening to around 85% near $2,000,000, roughly 80% near $3,000,000, and about 75% at the strongest credit tier up to $4,000,000 — with everything above that reviewed case by case before submission rather than published as a flat number. Second homes and investment properties generally run about five points lower than a comparable primary residence at every size band.
And once a file crosses roughly $3,500,000 on a primary residence, or around $3,000,000 on a second home or investment property, a separate set of super jumbo overlays typically applies: a 700 credit floor rather than the standard 660-to-680 range, a clean housing-payment history over the trailing two years, a longer seasoning window on any past credit event, U.S. citizenship or permanent residency, no non-occupant co-borrowers, and no rural property beyond ten acres. A CPA letter doesn’t move any of these. It can raise qualifying income; it cannot lower a credit floor, shorten a seasoning clock, or manufacture reserves the borrower doesn’t have.
That’s a distinction worth sitting with for a second. A CPA letter fixes an income-calculation problem. It has zero effect on a credit-score problem, a reserves problem, or a citizenship problem — those are separate gates entirely.
Reserves, Credit, And Cash-Out — What A CPA Letter Doesn’t Touch
Reserve requirements scale with loan size regardless of how strong the income number looks. Across the programs in Lendmire’s network, that typically runs three months of reserves up to $500,000, six months up to $1,500,000, and nine months above that — plus roughly two additional months for each other financed property the borrower already carries, up to a twelve-month ceiling. First-time real estate investors are often held to a full twelve months regardless of loan size. A larger qualifying income figure from a CPA letter doesn’t create that cash. The borrower still has to show it, sitting in the bank, unrelated to the business deposits already used to qualify.
Credit floors work the same way. The portfolio program generally starts around a 660 floor, the bank program closer to 680, and anything crossing the super jumbo overlay line typically needs 700 or better. Debt-to-income can run as high as 50% on most files. None of those numbers move because a CPA documented a lower expense ratio — they’re separate underwriting gates layered on top of the income calculation, not replaced by it.
Cash-out has its own ceiling too. On the portfolio program, cash-out proceeds are generally unlimited at or below 60% loan-to-value, with roughly a $1,500,000 cash-in-hand cap above that threshold on standard rental collateral — a figure that scopes to standard rentals, not short-term-rental collateral, where cash-out ceilings typically run lower. A CPA letter can help a borrower qualify for a larger loan amount. It has no bearing on how much cash actually comes back at closing.
Where DSCR Fits Into This Decision
This is where the two products truly overlap, and it’s worth saying plainly: an investor evaluating a large rental-property purchase often has a real choice. They can choose a bank-statement loan or a DSCR loan for the same property. But the expense-factor conversation only matters on one side of that choice.
DSCR loans are built for non-owner-occupied investment properties. Because they serve a business purpose, lenders review them differently than a standard owner-occupied mortgage. Most importantly, they qualify mainly on whether the property’s own rental income covers its payment, subject to lender guidelines — not on the borrower’s personal or business bank deposits. If a property’s rent comfortably covers its own payment, an investor can skip the whole expense-ratio conversation by financing it as a DSCR loan instead. Lendmire’s complete DSCR loans guide explains how that coverage math works.
A CPA letter earns its keep when DSCR coverage alone can’t support the loan size an investor wants. This might happen when a property’s rent barely covers the payment. Or it might happen when an investor combines a primary-residence refinance with investment property financing, and needs personal or business cash flow to carry more of the file. In these cases, a well-documented CPA letter can be the single most powerful document available. It can turn a marginal qualifying-income number into a comfortable one — without changing the borrower’s actual cash flow at all.
Non-QM lending has grown into a real share of the market — it’s no longer a fringe product. Scotsman Guide reports non-QM loans made up about 5% of all originations in a recent year, up from 3% four years earlier. Investor loans made up roughly 28.5% of nonconforming originations. And the credit profile behind these files isn’t what people assume. Average non-QM borrower credit scores have run close to conventional QM borrower scores. This suggests expense-factor documentation is simply a paperwork choice for these borrowers — not a sign of weaker credit.
What A CPA Letter Cannot Fix
A few things a documented expense ratio will never override, no matter how well the letter is written:
- A credit score below program floor. Income math and credit are separate gates.
- A short reserve position. Reserves have to exist in cash; they can’t be manufactured from a better income number.
- Super jumbo overlay conditions — citizenship status, seasoning on credit events, non-occupant co-borrower restrictions — once the loan crosses into that size tier.
- A DSCR ratio. If the property is being financed on rental income rather than personal deposits, the CPA letter has no role in that calculation at all.
- Commingled or pass-through deposit patterns that undercut the premise the business account is genuinely separate from personal funds.
A Note On Rental Income Documentation
Let’s clear up a common mix-up. The appraisal forms used to document market rent on an investment property — like Form 1007 for single-family rentals — have nothing to do with the borrower-side expense-factor calculation. As Fannie Mae explains, Form 1007 lets an appraiser record estimated monthly market rent on a single-family investment property. This is a property-level number that feeds the DSCR side of a file. It’s a completely separate calculation from the personal or business income math a CPA letter addresses on a bank-statement file.
Tax treatment can depend on how loan proceeds are used and how a property is titled; investors should keep clear records and talk to a qualified tax professional before relying on any deduction tied to either loan type.
Frequently Asked Questions
Does owning 100% of my business automatically lower my expense ratio?
No. Ownership percentage and the applicable expense ratio are separate questions entirely. The ratio only moves when a properly documented CPA letter supports a lower number — full ownership alone doesn’t change which tier a lender applies.
Is a CPA letter the same thing as stated income?
No. The borrower still produces actual bank statements, and any override still requires third-party documentation from a licensed CPA or tax preparer. Underwriters also cross-check deposit patterns against the letter rather than accepting the number at face value.
Can a CPA letter help me qualify for a DSCR loan?
Generally no, because DSCR lender review runs on the subject property’s rental income against its own payment — not on personal or business bank deposits. A CPA letter is a bank-statement-program tool; it doesn’t factor into a DSCR coverage ratio.
What happens if my business shows both W-2 payroll and pass-through subcontractor payments? Underwriters typically look at deposit patterns closely in that scenario. Pass-through payments that flow in and immediately out to subcontractors may get excluded from the average or treated with a higher effective expense ratio, rather than benefiting from a lower documented number.
Does a CPA letter help once my loan crosses into super jumbo overlay territory?
It can raise the qualifying income figure, but it does nothing for the separate overlay conditions — credit floor, seasoning, reserves, citizenship status — that typically apply above roughly $3,500,000 on a primary residence or $3,000,000 on a second home or investment property. Those gates sit outside the income calculation entirely.
Are you weighing a bank-statement loan against a DSCR loan for an investment-property purchase? Or trying to figure out whether a CPA letter will actually help your file? Lendmire can help you compare options. We look at the property’s income, your documentation path, your credit profile, and your target leverage. You can also see how the expense-factor mechanic works in more detail in Lendmire’s coverage of whether a CPA letter changes the expense factor on a super jumbo loan.
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
A DSCR-focused mortgage broker, Lendmire (NMLS# 2371349) places investor financing across 40 markets — 39 states plus Washington, D.C. — with DSCR eligibility generally reviewed by the lender on property cash flow instead of tax returns, subject to lender guidelines. Scotsman Guide named Lendmire a Top Mortgage Workplace in 2025 and 2026.
Lendmire’s Top Mortgage Workplace recognition is documented by Scotsman Guide 2025 Top Mortgage Workplace and Scotsman Guide 2026 Top Mortgage Workplace.
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References
1. Scotsman Guide — “These Loans Should Take Center Stage”
2. Scotsman Guide — “Which groups are driving non-QM lending?”
3. Fannie Mae — Appraiser Update, June 2024
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.
