The Quick Read: A CPA letter replaces the lender’s default expense factor on your business deposits with the ratio your accountant certifies. A lower certified ratio means more of each deposit counts as income, which raises the payment you can qualify for. The lender still scrubs your deposits, tests your debt-to-income ratio, and caps cash-out leverage by occupancy.
- Most programs average 12 months of business or personal statements, and the file is reviewed on documented income under the applicable program, subject to lender guidelines.
- The letter only helps if your true expense ratio is below the lender’s default. If it is higher, skip it.
- On an owner-occupied cash-out, a primary residence typically tops out around 80% LTV with a fixed expense ratio, and around 75% with an accountant-prepared ratio.
- A second home cash-out typically runs up to about 75% LTV, and an investment property cash-out tops out around 75% LTV.
- Underwriters compare the letter to your statements. A letter that clashes with visible payroll or supplier outflows gets rejected.
Plenty of self-employed investors have strong cash flow and tax returns that say otherwise. Write-offs shrink taxable income. A bank statement loan reads the deposits instead. The CPA letter is the lever inside that process. This guide walks through what underwriters do with it, step by step.
What Does a Lender Actually Decide on This Loan?
Underwriters decide two things: whether your documented income supports the new payment, and whether the property and equity support the cash-out amount. The CPA letter touches only the first question. It changes how much of your deposits count as income. It does nothing for your credit, your equity, or the appraisal.
A cash-out refinance replaces your current mortgage with a larger one and pays you the difference. So the lender sizes two things at once: the new payment against your income, and the new balance against the property’s value. Either one can be the limit.
Key Terms Defined
Bank statement program: a non-QM mortgage option that is reviewed around deposits in your bank accounts instead of tax returns.
Expense factor (expense ratio): the share of your business deposits the lender treats as operating costs, not income.
CPA letter: a signed statement from a licensed tax professional giving your business’s expense ratio, used in place of the lender’s default.
Qualifying income: the monthly income figure the lender uses after scrubbing deposits and applying the expense factor.
Cash-out refinance: a new, larger mortgage that pays off the old one and hands you the difference in cash.
Debt-to-income ratio (DTI): your monthly debts, including the new payment, divided by your monthly qualifying income.
How Do Underwriters Review the File, Step by Step?
The review runs in a set order: statements, deposit scrub, expense factor, monthly income, DTI, then the property and cash-out limits. Each step feeds the next. Knowing the order tells you where a file stalls and why.
Step 1: Choose the statement type and window. Most programs in our wholesale network work from 12 months of statements. Personal statements usually suit a borrower whose business runs through one personal account. Business statements suit an owner with a separate operating account. Lenders generally treat you as self-employed if you own a meaningful share of a business, work as a contractor, or file a Schedule C.
Step 2: Scrub the deposits. Underwriters strip out anything that is not income. Transfers between your own accounts, loan proceeds, refunds, and one-time windfalls come out. Overdrafts, returned items, and large unexplained deposits slow the file and can lower the number. This step has a regulatory reason: the CFPB’s ability-to-repay rule still applies to non-QM loans, and lenders cannot lean on deposits they cannot confirm as income.
Step 3: Apply the expense factor. On business statements, the lender multiplies eligible deposits by an expense factor to get income. Personal statements often use a larger share of deposits, since the account is not mixing business costs. If personal statements show business expenses, some programs push the file into business-statement treatment.
Step 4: Convert to monthly income and test DTI. The lender averages the qualifying figure over the statement window. Then it tests that income against the full new obligation: principal, interest, taxes, insurance, and any HOA dues, plus your other debts. Underwriters also ask whether the income is reasonable for your line of work.
Step 5: Apply the property and cash-out limits. The appraisal sets value. Occupancy sets the LTV ceiling. Reserves, typically around six months of the housing payment, come last. A later section covers those caps.
Where Does the CPA Letter Fit In?
The CPA letter substitutes your certified expense ratio for the lender’s default. If your business truly runs lean, the certified ratio is lower, more deposits count, and your qualifying income rises. If your costs run high, the letter works against you. It is an input to underwriting, never a guarantee of approval.
Think of it as a trade. The default factor is simple and conservative. The letter is more accurate for your business but invites scrutiny. Lenders accept a ratio from a licensed CPA, enrolled agent, or tax preparer, and most programs expect that person to base it on a real review of your financials. A bare assertion does not pass.
Most programs also set a floor on the ratio, so a preparer cannot certify an arbitrarily low number. And some programs cap cash-out leverage lower when the file uses an accountant-prepared ratio. That matches what we see on primary residences: the fixed-ratio route reaches up to 80% LTV, and the accountant-prepared route reaches up to 75%. The letter buys income. It can cost you leverage.
How Do Underwriters Review the Letter Itself?
Underwriters check five things in order: who signed it, what period it covers, what number it states, whether that number is plausible, and whether it reconciles to your statements. A letter that fails any one gets sent back. The review is a test of your letter against your own bank activity.
1. Credentials. The signer must be a licensed professional, and the letter should say so. Self-written letters fail.
2. Period. The letter should cover the same stretch as your statements. A stale letter or one for a different year raises questions.
3. The stated ratio. The letter must give a clear expense percentage. A letter that says your business is profitable but names no number does not work.
4. Plausibility. Underwriters know what expense levels look like for different trades. A landscaper certifying very low overhead draws a closer look.
5. Reconciliation. This is where files break. If the letter claims a low ratio but your statements show regular payroll, supplier payments, and vehicle costs, the numbers will not match.
Each of these problems is avoidable. Make sure the number on the letter is the number the lender uses.
The letter is not an audit and not a promise. Your CPA attests to a ratio based on records reviewed, nothing more. That is why underwriters still verify against your statements. The CFPB’s compliance guide lists bank statements among the records a lender may use to verify income, which is why your statements remain the backbone of the file.
What Does the Math Look Like With and Without the Letter?
Run the same deposits through two ratios and the difference is clear. These figures are illustrative units, not market data, so the first lines use round numbers only.
Say your business statements show deposits of 100 units a month after the scrub. Under a default expense factor of 50%, qualifying income is 50 units. Now say your CPA certifies a 30% ratio after reviewing your books. Qualifying income becomes 70 units. That is a 40% increase in income from the same deposits.
Flow that forward. A higher income figure lowers your DTI on the same new payment, which can move a borderline file into range or support a larger loan. But the cash-out amount still hits the LTV cap. If equity is the binding constraint, the stronger income buys you nothing extra, and you may have given up some leverage for it. These specifics are subject to lender guidelines and a full review of property, leverage, and credit.
So run both paths before you pay for a letter. If DTI is your constraint, the letter helps. If LTV is your constraint, it may hurt. That check takes a few minutes and saves a CPA fee.
Fixed Factor vs. CPA Letter vs. CPA-Prepared P&L
| Option | Who produces it | Effort | Scrutiny | Best fit |
|---|---|---|---|---|
| Default fixed factor | Lender applies it | None | Low | Higher true expenses |
| CPA expense letter | Licensed preparer | Moderate | Medium | Lean business, clear books |
| CPA-prepared P&L | Licensed preparer | Higher | Higher | Complex or seasonal income |
Terms vary by lender, and some programs accept only one of these routes. Matching your file to a program that fits is a core part of what a broker does across a network of wholesale lenders.
Why Do Letters Get Rejected, and How Do You Fix Them?
| Problem | What happened | Fix |
|---|---|---|
| No ratio stated | Letter praises the business only | Ask CPA to state the percentage |
| Wrong period | Letter covers a different stretch | Reissue to match statements |
| Self-written | Borrower drafted it | Use a licensed preparer |
| Ratio too low | Under the program’s floor | Accept a higher ratio or the default |
| Clashes with statements | Payroll visible, low ratio claimed | Revise the ratio or document the gap |
| Worksheet mismatch | Lender used a different number | Have the lender correct the worksheet |
A rejected letter is not the end of the file. You can get a revised letter, switch to a CPA-prepared P&L if the program accepts one, or fall back to the default factor.
When Does the Letter Hurt or Not Pay Off?
The letter hurts when your true expense ratio is higher than the default. It also fails to pay when LTV, not income, limits your loan. A third case: your personal statements are clean, with deposits that are mostly income and no business costs mixed in. Then you can often use a larger share of deposits with no letter at all.
Some programs also ask for a preparer’s statement that pulling business funds will not harm the business, and they may subtract months of expenses from business-account balances used toward reserves. Ask about both before assuming your balances count in full.
Ownership matters too. Business statements typically require a minimum ownership share, and anything below 100% may be prorated. A minority partner should check this before ordering a letter.
One more practical point: the letter takes lead time. Your accountant will want to review your books first. Order it before you apply, not after.
Cash-Out Limits That Sit on Top of the Income Test
Occupancy sets the ceiling. On an owner-occupied primary residence, cash-out typically runs up to 80% LTV with a fixed expense ratio. On a second home, it typically runs up to 75% LTV, set by loan size and credit. Do not confuse these with the up-to-90% figure that applies on a primary residence purchase or rate-and-term refinance. That higher number does not carry into cash-out.
Bank statement purchase leverage on an investment varies by lender, so treat any purchase figure as a conversation with a broker, not a number to plan around. Loan amounts across our wholesale network generally run from $125,000 to $3,500,000, with reserves commonly around six months of the housing payment. Asset-depletion, which is reviewed around liquid assets instead of deposits, runs to about 80% LTV on a primary residence. All of it is subject to lender guidelines and your credit profile. Lendmire’s complete DSCR loans guide covers the investor-side options in more depth.
Occupancy also decides the paperwork. An owner-occupied file is a consumer mortgage, so consumer disclosure rules apply. A bank statement loan on a non-owner-occupied rental, including a short-term rental, is a business-purpose loan and exempt from those rules. Know which applies to your property before you apply. Consumer mortgage licensing for this lane covers 16 states, so availability depends on where the property sits.
Bank Statement or DSCR: Which Fits the Rental?
On a rental, the better question is often whether to qualify the borrower or the property. A DSCR loan is reviewed primarily on property-level rental income covering the payment, subject to lender guidelines, and it skips your personal income paperwork. A bank statement loan is reviewed against deposits.
Choose bank statement with a CPA letter when your personal cash flow is strong but the rent coverage is thin. Choose DSCR when the rent comfortably covers the monthly obligation.
Use the cash wisely. Bank statement programs carry more cost and less standardization than a conventional loan, so run the full picture before you pull equity for the next purchase. Tax treatment varies; consult a qualified professional.
How to Prepare Before You Apply
1. Pull 12 months of statements and mark every transfer, refund, and loan deposit yourself. Fix or explain odd items. 2. Estimate your real expense ratio from your books. Compare it to the default your lender will use. 3. Ask your CPA to review your financials and put a ratio on letterhead, dated to match your statement window. 4. Check your ownership share if you use business statements. 5. Confirm occupancy and the LTV ceiling that goes with it, so you know your maximum proceeds before you chase income.
When you ask your CPA, be specific: you need a signed letter stating the expense ratio for a named business over a named period, based on their review of the records. Offer to give them full access to the books.
Frequently Asked Questions
Is a CPA letter required for a bank statement cash-out refinance?
No. Most programs apply a default expense factor to business deposits, so you can proceed without one. The letter is optional and useful only when your true ratio is below the default. On personal statements, you may not need it at all.
Who can sign the letter?
A licensed CPA, enrolled agent, or tax preparer, depending on the program. The signer should base the ratio on a real review of your business records. A letter you write yourself will not pass.
Does the letter replace my bank statements?
No. The letter sets the expense ratio, and your statements still supply the deposits. Underwriters compare the two.
Can a CPA letter guarantee approval or a higher loan?
No. It can raise qualifying income, but LTV caps, credit, reserves, and appraisal still apply, and every file is underwritten individually. On some programs, the accountant-prepared route even lowers the LTV ceiling.
Does a stale letter still work?
Usually not. The letter should cover the same period as your statements. A letter from an earlier period can draw a request for a new one, so reissue it when you reapply.
If You Are Self-Employed and Want to See How the Numbers Work
Lendmire is a mortgage broker, not a lender, and it arranges financing through select lenders in its wholesale network. If you are self-employed and want to see how the numbers work, Lendmire can help you compare bank statement loan options based on your deposits, the property, credit profile, leverage, and your goals. This is not a commitment to lend.
For how equity extraction works on an investment property, see Lendmire’s guide to cash-out refinance on an investment property.
About Lendmire
Lendmire is a mortgage brokerage (NMLS# 2371349) licensed for consumer mortgage lending in 16 states, arranging bank statement and other alternative-documentation mortgages — P&L-only, 1099-only and asset-based paths — through a wholesale lending network. Eligibility is determined by the lender on each file. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.
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Informational only. Not a Loan Estimate, approval, or commitment to lend. Program availability and eligibility are subject to lender guidelines, credit approval, property review, and underwriting.
References
1. CFPB – Regulation Z § 1026.43
2. CFPB – Ability-to-Repay and Qualified Mortgage Rule Compliance Guide
This article is part of Lendmire’s self-employed mortgage guides — full qualification details, guidelines, and scenarios live on the program page.
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
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Important disclosures. Lendmire (NMLS# 2371349) is a licensed mortgage brokerage. Lendmire is not a direct lender, depository institution, or financial advisor. All loan inquiries are subject to lender underwriting; this article does not constitute a commitment to lend. Rates, terms, and program guidelines are subject to change without notice and vary by borrower profile, property type, and state. Information in this article is general in nature and is not financial, legal, or tax advice. Equal Housing Opportunity. NMLS Consumer Access: nmlsconsumeraccess.org.