Can A CPA Letter Lower The Expense Factor On A Resort Bank Statement Loan — The Quick Read: Yes, on the bank statement side of a file, a CPA letter can replace the default expense ratio with your business’s real, documented cost structure. It does not touch a DSCR loan, because that loan is reviewed on the property’s rent, not your business deposits. For a resort purchase, the bigger issue is often not the expense factor at all — it’s whether the property’s seasonal income even fits a 12-month lease model.
That distinction matters more in resort markets than almost anywhere else. A ski-town condo or beach house rarely produces steady, evenly spaced deposits. So before getting into CPA letters, it helps to know which loan is actually being underwritten.
The Short Answer, Expanded
A CPA letter is a written certification — usually from a CPA, an enrolled agent, or a qualifying tax preparer — that states your business’s actual operating expense ratio. Underwriters use it to override the flat default expense factor applied to bank statement income. If your real costs run lower than the default, the letter can raise your qualifying income for that loan.
Here’s the part that trips people up on a resort deal: the CPA letter only matters when a bank statement loan is qualifying on your personal or business income. If you’re buying the resort property itself through a DSCR loan, the borrower’s expense ratio never enters the conversation. That’s because the loan is reviewed primarily on the property’s rental income covering the payment, subject to lender guidelines. Lendmire’s complete DSCR loans guide walks through how that property-income qualification actually works.
So the honest first question isn’t “how do I lower my expense factor.” It’s “which loan am I even asking this about?”
How The Default Expense Factor Works
Bank statement underwriting starts by averaging your deposits. Then it knocks off a chunk for assumed business costs. Scotsman Guide describes a common example where a lender completes the file “by averaging their monthly deposits and factoring in a 50% expense ratio.” That’s the number a CPA letter is built to challenge.
Across the wholesale network Lendmire works with, the fixed tiers most programs use run like this: 20% for a service business with no employees, 40% for a business with one to five employees, and 50% for a business with six or more employees, or any business selling a physical product. Those tiers exist because a solo consultant and a six-person contracting outfit don’t have the same overhead — but the fixed tiers don’t know that unless someone tells the underwriter otherwise.
That’s the CPA letter’s job.
The Mechanics, Step By Step
Underwriting math is simple once you see it laid out.
1. Total eligible deposits over the statement period — commonly 12 or 24 months.
2. Divide by the number of months to get an average monthly deposit figure.
3. Apply the expense ratio — either the fixed tier or the CPA-certified number — to find what portion counts as income.
4. The leftover percentage becomes qualifying income used against your debt-to-income ratio.
If the fixed tier says 50% and your CPA certifies your actual overhead runs closer to 20%, that’s a real jump in qualifying income on that file. Transfers from your own business into a personal account still count in full, so the CPA letter doesn’t change how those deposits are treated — only the expense haircut applied to the total.
One detail that resort-property investors overlook: eligible deposits are the recurring, business-related ones. One-time transfers, loan proceeds, and unusual lump deposits typically get excluded or flagged for an explanation, whether or not a CPA letter is in the file.
Who Can Actually Write This Letter
Self-certification does not work. The letter has to come from a credentialed third party — a CPA, an enrolled agent, or a qualifying tax preparer — who has actually filed your returns. A business owner writing their own letter, or a bookkeeper without the right credentials signing off, generally won’t move an underwriter.
It’s also a per-file decision, not a permanent label on your profile. You could submit one loan file under the fixed tier and pursue a certified lower ratio on a different file later, depending on how each deal is structured.
If you claim a lower ratio but can’t back it with a CPA letter or a profit-and-loss statement, most files fall back to the standard fixed tier rather than the number you were hoping for. No proof, no exception — that’s the rule across nearly every program in the space.
The P&L Alternative
A CPA-prepared profit-and-loss statement takes a different path. It supports income more directly instead of adjusting a deposit-based ratio. It’s generally capped at a higher expense assumption than the flat tiers allow. That makes it a useful option when a business’s real financial picture is more complex than a simple ratio can capture. Which path fits better — CPA letter or P&L — usually comes down to two things: how clean the business’s bookkeeping is, and whether the accountant is comfortable certifying a specific number in writing.
Where Resort Properties Actually Break This Model
This is where resort buyers run into a different problem entirely. A physician who bought a ski-town unit doesn’t look like a stable borrower on a 12-month lease schedule, because cash flow from that property swings hard between peak season and off-season. Forcing a seasonal short-term rental into an annual-lease income box is one of the most common reasons a resort file that should qualify doesn’t.
Programs built for resort properties don’t average a unit’s income the way a normal lease would. Instead, they rely on projected nightly rate and occupancy data specific to the property’s location. That’s a very different toolkit than the deposit-averaging math described above. This is a rental-qualification question, not an expense-factor question. It belongs to the DSCR side of financing, not the bank statement side.
There’s also a documented gap here worth knowing about. Fannie Mae’s own guidance notes that its Selling Guide is silent on whether short-term rental income should be treated as rental income at all, and that STRs differ from longer-term leases in several ways — most obviously the length of the agreement. McKissock Learning adds that the standard rent-schedule form used for single-family appraisals wasn’t built for nightly-rental math, and appraisers often need a different tool — like short-term rental market data — to estimate a realistic monthly figure. Multiplying a nightly rate by 30 days and calling it monthly rent skips over vacancy, personal-use time, and the business costs baked into running a short-term rental. That shortcut shows up constantly in resort deals, and it’s a common reason a property gets undervalued on paper.
Where Commingling Quietly Costs You Money
Sometimes rental income or property-management fees flow through the same account as an unrelated operating business. That mixed money can get hit with the same expense-factor haircut used for ordinary business deposits. A CPA letter fixes the ratio problem. But it doesn’t fix a mixed-up bank account. Keep landlord income in its own account, separate from your main operating business. This avoids an unnecessary discount that has nothing to do with your actual expenses. Lendmire’s guidance on this mechanic covers the separation issue in more detail.
Property Classification Is Often The Real Obstacle
Non-warrantable condos and condotels are common in resort markets. They’re the norm there, not the exception. The real issue with these properties usually isn’t the size of the down payment. It’s control: who decides who occupies the unit. A self-managed non-warrantable condo, where the owner controls rental decisions, is generally an easier file. A mandatory rental-pool condotel is harder, because the building’s management — not the owner — decides occupancy. That setup can behave more like a hotel operation than a straightforward rental property. It affects leverage regardless of what your CPA letter says about your business expenses.
Across the wholesale network, condotels typically run to 75% LTV on a purchase and 65% on a cash-out on the portfolio bank-statement program, with a lower ceiling of 50% cash-out on the higher-balance bank portfolio program. Warrantable condos run higher, to around 85%, and non-warrantable condos generally cap near 80%. None of these figures move because of a CPA letter — that’s a property classification question, entirely separate from the income-documentation question.
What This Means For A Resort Purchase, Practically
Say you’re buying the resort unit itself as a rental. The loan you actually want is usually a DSCR loan, not a bank statement loan. Why? DSCR loans qualify primarily on the property’s rental income covering the payment, subject to lender guidelines. This sidesteps the entire expense-ratio conversation. Lendmire’s DSCR vs. conventional comparison breaks down how that qualification path differs from a personal-income loan.
Where the CPA letter actually earns its keep is on a linked piece of financing — a primary residence, a second home, or a bridge loan — where your self-employed business income is the qualifying source. If your business’s real expense ratio runs meaningfully below the fixed tier, a properly credentialed letter can expand your purchasing power on that transaction directly.
Across our wholesale network, sizes for this kind of high-net-worth bank statement financing run from $300,000 up through $30,000,000, split across two programs. A portfolio non-QM program carries files to $6,000,000, and a bank portfolio program handles 12-month-statement files on its own ladder — 65% at the lower end down to 60% and 55% as loan size climbs to $30,000,000, with interest-only capped at 60% or the applicable band’s ceiling, whichever is lower. Leverage on a primary residence starts around 90% at smaller loan sizes and steps down as the loan grows — 85% near $2,000,000, 80% near $3,000,000 — with everything above roughly $4,000,000 reviewed case by case before submission. Second homes and investment properties generally run about five points lower at every size tier than a comparable primary residence.
Documentation across most programs in the network runs on 12 or 24 consecutive months of bank statements, with a 660 credit floor on the portfolio program and 700 on files near the super-jumbo size line. Reserve requirements typically scale from three months on smaller loans up to nine months on larger ones, plus additional reserves for other financed properties.
DSCR loans are business-purpose investment loans, so they’re reviewed differently from a standard owner-occupied mortgage — that’s part of why the property’s income, not your CPA’s letter, carries the file.
Key Terms Defined
Expense factor (or expense ratio): the percentage of your average monthly deposits an underwriter treats as business overhead — the rest counts as qualifying income.
CPA letter: a signed statement from a CPA, enrolled agent, or qualifying tax preparer certifying your business’s actual expense ratio, used to override a lender’s default assumption.
DSCR loan: a loan that qualifies based on whether a rental property’s income covers its payment, rather than reconstructing the borrower’s personal income.
Bank statement loan: a personal-income loan that qualifies self-employed borrowers using deposit history instead of traditional personal-income documentation.
Non-warrantable condo / condotel: a condo project that doesn’t meet standard agency eligibility rules, often because of high investor concentration, commercial space, or mandatory rental-pool management.
Tax treatment can depend on how funds are used and how a property is held — investors should keep clear records and speak with a qualified tax professional before relying on any deduction.
Frequently Asked Questions
Does a CPA letter help me qualify for a DSCR loan on a resort property?
No. DSCR loans qualify primarily on the property’s own rental income covering the payment, subject to lender guidelines, so your business expense ratio doesn’t factor into that specific loan. A CPA letter only matters on a bank statement loan qualifying on your personal or business income — typically a different piece of financing tied to the same borrower.
What happens if my CPA won’t sign a letter certifying a lower ratio?
The file generally falls back to the standard fixed tier for your business type — 20%, 40%, or 50%, depending on employee count and business type. No CPA letter and no profit-and-loss statement means underwriting uses the default assumption rather than the number you were hoping for.
Can I use a CPA letter on more than one loan?
Yes, it’s an option per loan file rather than a permanent designation. You could use the fixed tier on one file and pursue a certified lower ratio on a different file, depending on how each deal is structured and what your accountant is willing to certify.
Why does my resort property look worse on paper than it actually performs?
Most likely because the file is being built around 12 months of even lease income, which doesn’t match a seasonal property’s real cash flow pattern. Programs built around short-term rental data — nightly rate and occupancy specific to the property’s location — generally capture that income far more accurately than a forced annual-lease calculation.
Should I keep my rental income in a separate bank account?
Yes. If rental deposits or management fees run through the same account as an unrelated operating business, that income can get swept into the business’s expense-factor haircut unnecessarily. A dedicated account for landlord income keeps that money from being discounted for costs it never actually incurred.
If you’re weighing a DSCR loan against a bank statement loan for a resort purchase, Lendmire can help you compare options based on the property’s income, your credit profile, available leverage, and your broader investment 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
Lendmire (NMLS# 2371349), a non-QM mortgage broker serving investors in 40 markets including Washington, D.C., helps structure DSCR scenarios commonly evaluated around a property’s rental income rather than personal income paperwork, subject to lender guidelines. A Scotsman Guide Top Mortgage Workplace in 2025 and 2026, Lendmire places loans through wholesale investor lenders and is not a direct lender.
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. Fannie Mae — Appraiser Update June 2024 (Form 1007/STR)
3. McKissock Learning — Form 1007 & Its Impact on Short-Term Rental Appraisals
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.
