The Quick Read: Pick 12 months when your most recent year is your strongest and your deposits are climbing. Pick 24 months when your income is seasonal or lumpy and a short average would distort it. The window you choose changes your qualifying income before the expense ratio, the debt-to-income test, or the leverage limits apply. You do not always get to choose. Through select wholesale programs, the 24-month option sits on the portfolio non-QM program, while the bank portfolio program uses 12 months.
- The window sets the divisor: eligible deposits are totaled and divided by 12 or 24.
- A rising income pattern usually favors 12 months, and a lumpy or recovering pattern usually favors 24.
- The expense ratio follows your business type and headcount, not the window.
- Files above $4,000,000 are reviewed case by case before submission, so the window is confirmed on review at that size.
- Programs are offered through select wholesale channels and are subject to full underwriting, so nothing here is a commitment to lend.
What “Statement Months” Means on a Super Jumbo File
Statement months are the consecutive monthly bank statements a lender averages to calculate your income instead of reading your traditional personal-income documentation. This article covers mortgage qualification. It does not cover small-business loans or bookkeeping.
The target reader is a founder, physician, attorney, entertainer, or investor whose traditional personal-income documentation understates what actually moves through the accounts. Deposits show what the business collected. A bank statement program lets the file qualify on documented income under the applicable program, subject to lender guidelines.
“Super jumbo” is a lender-defined tier, not a legal category. In Lendmire’s wholesale network, loan amounts run from $300,000 to $30,000,000 across two programs. The portfolio non-QM program carries files to $6,000,000 and accepts 12 or 24 months of statements. The bank portfolio program carries 12-month files to $30,000,000 on its own size ladder. That ladder begins above $4,000,000 and overlaps the portfolio program to $6,000,000. Above $6,000,000 it stands alone. Every file above $4,000,000 is reviewed case by case before submission.
How Underwriting Turns Deposits Into Income
Underwriting converts deposits into income in a fixed sequence. The steps below match how files move through the network and how HousingWire’s bank statement loan guide describes the product.
1. Choose the account type. Personal-account deposits count without an expense ratio. Business-account deposits count after one.
2. Pull every page of every statement. The statements must be consecutive. A transaction history never substitutes for a statement, and a missing month breaks the file.
3. Strip out non-income. Loan proceeds, refunds, and transfers between your own accounts come out. Large or unusual deposits stay in only if you can source them.
4. Apply the expense ratio and your ownership share. Business deposits are reduced by the ratio. Income is then prorated to your share of the company.
5. Divide by the window. The adjusted total is divided by 12 or 24, depending on the statements you submit.
6. Run the result through the rest of the file. Qualifying income feeds the debt-to-income test, which tops out at 50% on most files, along with credit and reserves.
Step five is the whole subject of this article. Everything before it is the same under either window.
12 Months or 24: The Side-by-Side
The two windows behave differently depending on the shape of your income. Neither is safer in every case.
| Factor | 12 months | 24 months |
|---|---|---|
| Best income pattern | Growing, strongest year is latest | Seasonal, lumpy, or recovering |
| What it averages | Only the latest year | Two full years |
| Effect of one big month | Diluted less | Diluted more |
| Main risk | One weak stretch hurts more | A strong recent year gets dragged down |
| Program availability | Both programs | Portfolio program only |
Averaging is arithmetic. A spike month moves a 12-month average more than a 24-month average. A slump moves it the same way. If your newest year is your best, extra months of older, lower deposits work against you. If your newest year contains a bad stretch, the extra months work for you.
Run the Same Borrower Through Both Windows
Here is a worked comparison using illustrative index numbers. They are modeled assumptions, not market data and not dollars. Treat 100 as a monthly deposit average, and assume a 40% expense ratio, which applies to a business with one to five employees.
Borrower A has growing income.
- The prior year averages 100 per month, and the latest year averages 125.
- A 12-month window gives 125 before the expense ratio and 75 after it.
- A 24-month window gives 112.5 before the ratio and 67.5 after it.
- The 12-month window produces about 11% more qualifying income.
Borrower B has a dip in the latest year.
- The prior year averages 120, and the latest year averages 100 after a slow stretch.
- A 12-month window gives 100 before the ratio and 60 after it.
- A 24-month window gives 110 before the ratio and 66 after it.
- The 24-month window produces about 10% more qualifying income.
Same method, opposite answer. Because the expense ratio hits every deposit at once, a 10% swing in the average becomes a 10% swing in qualifying income. That moves your debt-to-income ratio and, on some files, your maximum loan amount. Final terms depend on the lender’s guidelines, the property type, and the borrower’s complete credit picture.
Underwriters also read the trend. Borrower B’s 24-month average looks better on paper, but a falling line is a flag under either window. Expect a written explanation of the dip if you choose the longer window to hide it.
Which Months Count
Statements must be consecutive and recent, and the window ends at your most recent complete statement before submission. You cannot skip a bad quarter. A gap or a missing page breaks the sequence. A single month in the middle cannot be swapped out for a better one.
Anomalous months need handling, not hiding. A one-time sale, a large transfer, or a refund can distort a month. Underwriters ask for a source on large or unusual deposits and exclude the ones that cannot be documented. Gather the paperwork before you submit rather than after the underwriter asks.
Timing matters because the window rolls forward. Each new statement pushes the oldest month out of the average. If a weak month sits at the start of your 12-month window, waiting one more statement cycle may drop it. If a strong month is about to roll off, applying sooner keeps it. Plan the application date around your statements, not the other way around.
Business, Personal, or a Blend
The account type decides whether an expense ratio applies, and it can move your income as much as the window does. Across the programs in the network, the ratio is set by business type:
- 20% for a service business with no employees.
- 40% for a business with one to five employees.
- 50% for a business with six or more employees or any product business.
- An accountant-provided ratio, when your tax preparer documents a different figure.
- A profit-and-loss method, capped at 80% of the figure it produces.
Business statements require at least 25% ownership. Income is prorated to your share, so a partner holding a minority stake is reviewed on that share only.
Personal accounts work differently. Transfers from your own business into your personal account count at 100%. That means a founder who pays themselves regularly can sometimes qualify more cleanly on personal statements. The owner who leaves most revenue inside the business account usually does better on business statements with a documented ratio. Which one helps depends on where the money lands and how much you draw. For the personal-account side of that choice, see Lendmire’s piece How to Pick Personal Bank Statement Months on a Super Jumbo Loan.
Choose the account type first, then the window. They interact, but the account type is the bigger lever.
Where the General Rule Breaks
The 12-versus-24 logic is a rule of thumb. These cases bend it.
Size. Window availability follows the program, and the program follows the loan amount. Through select wholesale programs, a file above $6,000,000 is reviewed case by case on the bank portfolio program, which uses 12 months. Between $4,000,000 and $6,000,000 both programs may apply, and the window is confirmed on review.
Business history shorter than the window. If the business has less than 24 months of history, the 24-month option is not available. A 12-month file may still work.
Declining deposits. A shrinking line is a red flag under either window. A longer window can raise the number but will not hide the direction.
Heavy transfers between your accounts. Frequent moves between personal accounts and the business get a closer look. HousingWire’s guide says transfers between your own accounts, refunds, and loan proceeds should be excluded, and large spikes documented with invoices or contracts.
Business funds as assets. Business funds never count as liquid assets on the asset-based paths. They may help income, but they will not build your reserve or asset test.
Mixed accounts. Some owners run income through both personal and business accounts. Lendmire’s piece How to Pick Mixed Account Bank Statement Months on a Super Jumbo Loan covers that blend.
Credit and leverage overlays. The portfolio program starts at a 660 floor and the bank portfolio program at 680. The portfolio program moves to 700 above the super jumbo line. That line sits at $3,500,000 on a primary residence and $3,000,000 on a second home or investment property. On a primary residence purchase, leverage steps down through select wholesale programs as loan size grows, subject to full underwriting. Second homes and investment property take their own ladders, so read the figure from the occupancy’s own band. Above $4,000,000, leverage is reviewed case by case before submission.
Reserves scale too: 3 months to $500,000, 6 months to $1,500,000, and 9 months above that, with more for additional financed properties.
A federal rule requires lenders to make a reasonable, good-faith repayment determination, per the CFPB’s ability-to-repay rule. The CFPB’s compliance guide adds that the creditor must verify the income it relies on. Neither sets the window or the expense ratio. Those are lender and investor policy.
A Five-Step Test for Picking Your Window
Run these steps with your own statements before you talk to anyone.
1. Total each month’s eligible deposits. Remove transfers between your own accounts, loan proceeds, refunds, and any one-time deposit you cannot source.
2. Average the latest 12 months and the full 24. The gap between the two shows which way your income is leaning.
3. Check the direction. If the 12-month average is higher and the line is rising, lean toward 12. If the 24-month average is higher, find out why before you lean toward it.
4. Test the weakest month. If dropping one month would flip your answer, the file is sensitive to timing. Consider waiting one statement cycle.
5. Apply the expense ratio for your business type. Then see which window leaves enough income for your debt-to-income test at the loan size you want.
If the two windows land within a few percent of each other, choose the one with simpler documentation. The 12-month file asks for less paper.
Preparation Checklist
Do this work before the file is submitted.
- Download complete statements for every account the business and you use. Keep every page.
- Mark every large deposit and attach its source: a sale, an invoice, a distribution.
- Separate business and personal money flows going forward, so transfers are easy to read.
- Ask your accountant whether a documented expense ratio would beat the default for your business type.
- Confirm your ownership percentage in writing.
- List every other financed property, since each one adds to the reserve requirement.
- Note any credit event, because super jumbo overlays include 48-month seasoning and a 0x30x24 housing history. Each figure is subject to lender guidelines and a complete review of property type, leverage, and credit.
When Bank Statements Are the Wrong Path
Bank statements fit when your deposits tell a clean story. They are the wrong tool when they do not.
If your deposits are inconsistent but your assets are large, the asset paths may fit better. An asset allowance divides liquid assets by 36, 60, or 84 months. The assets-only path needs liquidity equal to the loan plus costs. These apply to primary and second homes only, and retirement accounts count at a discount.
If you are buying a rental, a DSCR loan is reviewed primarily on property-level rental income covering the payment, subject to lender guidelines. Bank statement files still make you qualify on your own liabilities. Lendmire’s complete DSCR loans guide explains when the property-income route is the easier fit.
Key Terms Defined
Statement window: the number of consecutive months of bank statements averaged to calculate income, usually 12 or 24.
Expense ratio: the share of business deposits removed to account for business costs before income is calculated.
Non-QM: a mortgage that sits outside the qualified-mortgage documentation box, so the lender designs its own income method.
Eligible deposits: deposits that count as income after loan proceeds, internal transfers, and unsourced large items are removed.
Seasoning: the waiting period a lender wants after a credit event before it will consider the file.
Asset allowance: a path that is reviewed on liquid assets divided by a set number of months instead of on deposits.
Frequently Asked Questions
Can I switch from 12 months to 24 months after I start?
Often yes, if the program allows it and you have the statements. The decision is made when the file is structured, not after underwriting. Because the 24-month option sits on the portfolio program, switching can also change which program reviews the file.
Does a longer window change my expense ratio?
No. The ratio follows your business type and headcount, or an accountant-provided figure. The window only changes the divisor.
What if I have a month with a very large deposit?
It stays in only if you can document the source. A sale, an invoice, or a distribution with paperwork can count. An unsourced deposit is excluded, and the average falls accordingly.
Do I need 24 months of business history to use the 24-month window?
Yes. If the business is younger than the window, only the shorter option is available. Some programs in the network can review shorter histories on a case-by-case basis.
Can I mix business and personal statements?
Programs differ, so ask before assuming. Transfers from your own business into a personal account count in full, which can make personal statements the cleaner choice for owners who pay themselves regularly.
Next Step
If you are financing a high-balance property on business or personal bank statements and want to see how the numbers work, Lendmire can help you compare super jumbo bank statement loan options based on your deposits, the property, credit profile, leverage, and your goals. Lendmire is a broker that shops multiple wholesale programs, and its consumer mortgage lending is licensed in 16 states: AL, CA, CO, FL, GA, IN, MI, MT, NM, NC, OH, PA, TN, TX, VA, and WA. Terms depend on full underwriting, and nothing here is a commitment to lend.
Lendmire’s self-employed mortgages page presents both super jumbo programs, bank statement and DSCR, side by side.
About Lendmire
As a non-QM mortgage broker (NMLS# 2371349), Lendmire facilitates DSCR investor loans across 41 markets, including Washington, D.C. DSCR eligibility is generally reviewed around property-level rental income instead of personal income documentation, subject to lender guidelines, serving LLC-structured portfolios and self-employed borrowers who don’t fit conventional boxes. A two-time Scotsman Guide Top Mortgage Workplace (2025, 2026).
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References
1. HousingWire, How Bank Statement Loans Work
2. CFPB, Ability-to-Repay Rule, 12 CFR 1026.43
3. CFPB, Ability-to-Repay and Qualified Mortgage Small Entity Compliance Guide
This article is part of Lendmire’s super jumbo bank statement loan program — full qualification details, guidelines, and scenarios live on the program page.
Related reading: Can Assets Alone Qualify You for a Super Jumbo Bank Statement Loan? · How Many Months of Reserves Does a Super Jumbo Bank Statement Loan Require? · How Super Jumbo Bank Statement Loan Limits Work
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.