Document Two Years Of Deposits — The Quick Read: A 24-month bank statement file works by totaling every deposit that hit the account, stripping out transfers and one-time credits, applying an expense factor if it’s a business account, and dividing what’s left by 24 to get a monthly income figure. Above roughly $3.5 million, every file also gets a manual, case-by-case look before it goes to underwriting. Choosing 24 months over 12 isn’t automatic — it depends on whether the borrower’s income is flat, growing, or seasonal.
Key Takeaways
- A bank statement loan replaces traditional personal-income documentation with 12 or 24 months of deposit history as the income measure.
- The expense factor — the assumed cost of running the business — determines how much of the deposit total actually counts as income.
- Large or unexplained deposits get flagged and need a paper trail, not necessarily a rejection.
- Above roughly $3.5 million on a primary home (and $3 million on a second home or rental), files move into manual, case-by-case underwriting with tighter overlays.
- A CPA letter can raise qualifying income by certifying a lower actual expense ratio than the standard default.
Key Terms Defined
Expense factor — the percentage of gross business deposits a lender assumes went to running the business, not into the borrower’s pocket. What’s left after that haircut becomes qualifying income.
Lookback window — the number of consecutive months of bank statements a lender reviews, typically 12 or 24 for a self-employed borrower on this kind of file.
CPA letter — a signed statement from a licensed accountant certifying the business’s actual operating expense ratio, used to replace the lender’s flat default assumption.
Case-by-case review — a manual underwriting process (rather than an automated one) used once loan size crosses a set threshold, where every income and asset detail gets individual sign-off before submission.
Asset allowance — an alternative qualification path that divides a borrower’s liquid assets by a set number of months instead of counting bank deposits at all.
The Setup: Why Two Years Matters More at Super Jumbo Size
Two years of deposits does one job: it proves the income pattern is real, not a lucky quarter. At smaller loan amounts, a lender might accept 12 months and move on. At the sizes this program handles — $300,000 up to $30 million through two separate wholesale programs — that same 12-month snapshot carries a lot more weight, because the loan amount riding on it is bigger and the downside of a bad read is bigger too.
Across the wholesale network Lendmire places files with, documentation depends on which program fits the loan size. A portfolio non-QM bank-statement program typically carries files to $6 million. A separate bank portfolio jumbo program, which relies on 12-month statements specifically, has its own size ladder running to $30 million — 65% loan-to-value to $5 million, 60% to $10 million, and 55% up to $30 million, with interest-only capped at 60% or the ladder’s own ceiling, whichever is lower. These are two different products with two different rulebooks, not one blended number.
Step 1: Pick the Lookback Window — 12 or 24 Months
Twelve months and 24 months rarely produce the same qualifying income, and the direction of the gap depends on the borrower’s trendline. If revenue has grown recently, a shorter 12-month window can actually produce a higher number, since it doesn’t dilute a strong recent year with a weaker prior one. If revenue is seasonal or lumpy, 24 months smooths that out and can present a steadier picture to an underwriter.
This is a real decision, not a formality. A borrower whose business had a slow first year and a strong second year may prefer the 12-month path. A borrower with steady, predictable deposits across both years usually benefits from going longer, since it demonstrates durability rather than a single good stretch.
Step 2: Total Deposits and Strip What Doesn’t Count
The math runs in a fixed order: total every credit that hit the account over the lookback period, then remove anything that isn’t recurring income. Transfers between the borrower’s own accounts, loan proceeds, credit-line advances, tax refunds, and one-time items like the sale of an asset all come out before an income figure gets calculated.
On a consumer-purpose (owner-occupied) loan, this step isn’t just a lender preference. It comes from a specific federal verification standard. Compliance guidance built around the Ability-to-Repay rule says clearly that a lender fails to meet its verification duty if it “observes a unidentified $5,000 deposit into the consumer’s account but fails to take any measures to confirm… That the deposit represents the consumer’s personal income,” according to the market tracking compliance analysis published by Hunton Andrews Kurth. A related summary from a market source walks through the same verification-requirement language behind that standard. Business-purpose investment property loans aren’t bound by that same consumer rule. But the underlying practice — trace it, don’t guess — carries over across the industry no matter the occupancy type.
Lenders treat transfers from a borrower’s own business into a personal account differently than an unexplained deposit from a third party. Across the network, these internal business-to-personal transfers count in full toward qualifying income. That’s because the money already belongs to the borrower. It’s just moving between accounts, not showing up out of nowhere.
Step 3: Apply the Expense Factor
Personal bank accounts are treated as already net of expenses, so most programs count 100% of personal deposits as income. Business accounts get a haircut first, because gross business revenue includes money that goes right back out to payroll, rent, and suppliers.
Across the wholesale network, that haircut typically runs on a fixed schedule: a 20% expense factor 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 product-based business. A profit-and-loss method is also available, capped at 80% of stated income, and an accountant-provided ratio can replace the fixed default entirely — which brings in the next lever.
Step 4: Layer In a CPA Letter If the Numbers Justify It
A CPA letter isn’t required on most bank statement files, but it exists to fix one specific problem: the standard fixed expense ratio can understate how efficient a business actually is. A signed letter from a licensed CPA or enrolled agent certifies the business’s real operating expense ratio and replaces the default assumption with that documented number.
For the letter to carry weight, it needs to identify the preparer by full name, professional title, license or credential number, firm name, and contact information — an unverifiable preparer defeats the purpose. A business running at, say, a 20% actual expense ratio instead of a standard 50% default can produce meaningfully more qualifying income on identical deposits, which is exactly why a CPA letter is worth requesting when the business’s real cost structure is leaner than the default assumes.
This is one of the more useful levers in the whole process, and it’s covered in more depth in Lendmire’s guide on using business deposits on a super jumbo file.
Step 5: Document Large or Unusual Deposits
Every deposit far above the account’s normal pattern draws a second look, and the borrower needs to be ready to explain it before the underwriter asks. A commonly used practitioner benchmark treats a single deposit at roughly 25% or more of the average monthly deposit level as one worth flagging.
That doesn’t mean the deposit is disqualifying. A documented gift, an inheritance, an insurance settlement, or a one-time asset sale all get excluded from the income calculation entirely — they’re removed, not treated as a red flag, once the source is clear. What actually slows a file down is a deposit nobody can trace: an unexplained wire, a cash deposit with no paper trail, or a pattern of transfers between accounts the borrower controls that looks like the same dollars moving in a circle. Lendmire’s guide on documenting large deposits on a super jumbo file walks through the acceptable proof for each of these scenarios in more detail.
What Can Go Wrong: Commingled Accounts and Consistency Gaps
Investors who move money constantly between a personal checking account, a single-member LLC, and a property-management trust account create the exact pattern underwriters have to untangle. An entity transfer — say, a management LLC sweeping rent collections into a holding account, which then pays the borrower personally — needs to be traced through every hop, and it typically gets excluded from income rather than counted twice.
Consistency also matters more than raw volume. A pattern of irregular spikes raises questions even when the two-year average looks strong, and NSF fees or overdrafts get scrutinized regardless of how healthy the total deposit figure appears. A steady, explainable pattern across 24 months reads as more reliable to an underwriter than one enormous quarter propping up an otherwise thin average.
For borrowers whose deposit history is genuinely messy — multiple entities, frequent internal transfers, seasonal swings that don’t average out cleanly — an asset-based path can skip the deposit-tracing exercise altogether. The asset allowance option divides liquid assets by 36, 60, or 84 months, depending on the borrower’s debt-to-income position and loan size. An assets-only path needs no DTI calculation at all, as long as liquid assets cover the loan amount plus closing costs. Retirement accounts count toward that total at 70% (80% once the borrower turns 59.5 or older). Business funds, gifts, non-revocable trusts, unvested stock, and cryptocurrency don’t count at all on this path.
The Super Jumbo Size Ladder and What It Means for Documentation
Documentation depth doesn’t stay flat as loan size climbs — it gets stricter. Above $3,500,000 on a primary residence, and above $3,000,000 on a second home or investment property, files carry overlay conditions on top of the standard deposit review: a 700 credit floor, a clean 0x30x24 housing payment history, 48 months of seasoning on any prior credit event, and no non-occupant co-borrowers. Cash-out proceeds also can’t be used to satisfy post-closing reserve requirements at that size. Final terms depend on lender guidelines, property type, leverage, and the borrower’s complete credit picture.
Every loan above roughly $4,000,000 gets reviewed case by case before it’s even submitted, regardless of how clean the deposit history looks — leverage figures above that point are a starting reference point for underwriting discussion, not a guaranteed number. On a primary residence, that ladder steps down from 90% loan-to-value near $1 million to 65% in the $4-5 million range, then to 60% between $5 and $10 million, and 55% from $10 million up to $30 million on review. Investment property and second-home leverage runs roughly five points lower at every size tier than the primary-residence figures.
Lendmire’s team has seen this pattern show up again and again in dozens of high-net-worth files. Above $2 million, the deposit math is usually the easy part. The real trouble spots are reserves and seasoning, which can trip up an otherwise strong borrower. That’s because reserve requirements go up as the loan size goes up: 3 months of reserves up to $500,000, 6 months up to $1.5 million, and 9 months above that. Add 2 months for each extra financed property. First-time investors, though, always need a full 12 months of reserves, no matter the loan size.
Rental Income and the Appraisal Side of the File
If the property being purchased is a rental, the appraiser — not the bank statement underwriter — handles a separate piece of the income picture. For a single-family rental, appraisers use Fannie Mae’s Form 1007, a standardized rent schedule that estimates monthly market rent using comparable rental data. This same form naming shows up in non-QM underwriting broadly, even outside agency lending, simply because it’s the industry-standard way to document market rent on a 1-unit property.
Investors buying a 2-4 unit property alongside a bank statement file — or considering a DSCR loan on a separate rental — should know that rental-property qualification runs on a completely different set of rules than personal deposit income does. Lendmire’s complete DSCR loans guide covers how a property’s own rental income, rather than the owner’s bank statements, can qualify a purchase or refinance on investment property.
Who This Path Fits — and Who It Doesn’t
This documentation route tends to fit self-employed founders, physicians, attorneys, and investors whose traditional personal-income paperwork understates their real cash flow after deductions. It fits less well when a borrower has genuinely thin or erratic deposit activity, multiple commingled entities with no clean paper trail, or income concentrated in one or two huge, hard-to-explain deposits. In those cases, an asset-based path or a CPA-supported letter often works better than another year of raw statements would.
Investor participation in this broader non-QM category keeps rising: investor loans made up roughly 28.5% of nonconforming originations in a recent month tracked by Scotsman Guide, citing Optimal Blue data. Credit quality on these files has also converged with conventional lending — the average non-QM borrower carried a 776 FICO score in a recent vintage, per Scotsman Guide, which is roughly in line with conforming borrowers rather than the subprime profile the category is sometimes assumed to carry. These specifics are subject to lender guidelines and a full review of property, leverage, and credit.
Tax treatment on any of these transactions can depend on how the funds are used and how title is held; investors should keep clear records and speak with a qualified tax professional before relying on any deduction.
If assembling two years of deposit history feels more complicated than it should — multiple entities, mixed personal and business activity, or a loan size that’s already brushing up against the manual-review threshold — Lendmire can help sort through which documentation path actually fits the file before it goes anywhere near underwriting. Reach the team at 828-256-2183 or request a quote directly to talk through the options.
This article is for general information only. It isn’t legal or tax advice. The loan program terms, expense ratios, and leverage figures here are just examples based on typical wholesale-network guidelines. They’re subject to full underwriting, credit approval, and program availability. Before making financing decisions, readers should talk to a qualified attorney or CPA about their own situation.
Frequently Asked Questions
Does 24 months always produce a better qualifying income figure than 12 months? No. If income has grown recently, a shorter 12-month window can actually produce a higher number, since it isn’t diluted by a weaker earlier period. A borrower with flat, steady deposits across both years is the one most likely to benefit from the longer window.
What happens if a page is missing from one month’s statement? Statements need to be consecutive and complete; a transaction history or a summary printout doesn’t substitute for the actual monthly statement. A missing page typically means requesting a replacement copy from the bank before the file can move forward.
Do personal and business deposits get treated the same way? No. Personal account deposits are generally counted at 100%, since they’re assumed to already be net of business costs. Business account deposits get reduced by an expense factor first, because gross business revenue includes money that goes back out to run the business.
Is a CPA letter worth getting for every file? Not necessarily. It’s most useful when the business’s actual operating costs run meaningfully lower than the standard fixed expense ratio the lender would otherwise apply — in that scenario, the certified ratio can raise qualifying income. For a business already close to the standard assumption, a letter adds cost and paperwork without much benefit.
What happens above roughly $4 million in loan amount? Every file above that size moves into manual, case-by-case underwriting review before it’s even submitted, with tighter credit, seasoning, and reserve conditions layered on top of the standard deposit analysis.
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
1. Fannie Mae — Form 1007 Single-Family Comparable Rent Schedule
2. Scotsman Guide — Investors Anchor Housing Market as Non-QM Loans Surge
3. Scotsman Guide — Which Groups Are Driving Non-QM Lending
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
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Required disclosures. Lendmire (NMLS# 2371349) operates as a licensed mortgage broker, not a direct lender or depository. The discussion in this article is general in nature and should not be relied upon as financial, legal, or tax advice — every investment scenario is unique and should be reviewed by a qualified professional. Any loan inquiry is subject to lender underwriting, and this article is not a commitment to lend or a guarantee of approval. Mortgage rates, loan terms, and program guidelines vary by borrower, property, and state, and may change without notice. Equal Housing Opportunity. Verify licensure at NMLS Consumer Access.
