The Quick Read: Twelve months usually fits a borrower whose income is rising, while 24 months usually fits a borrower whose income is steady, seasonal, or lumpy. Across the wholesale network Lendmire works with, both windows exist on the portfolio non-QM program, and the bank portfolio program for the largest balances uses 12. The window changes only how your deposits average into monthly income. It does not change your loan size limit.
- Qualifying income is eligible deposits divided by the months in the window, so the window sets the divisor and the deposits it captures.
- Rising income favors 12 months. Flat or seasonal income often favors 24. Falling income helps neither window much.
- Personal statements are generally read closer to net eligible deposits, while business statements take an expense ratio first.
- Above $4,000,000, every file is reviewed case by case before submission, whichever window you pick.
- These are not no-doc loans. Your income is reviewed on documented deposits under the applicable program, subject to lender guidelines.
Here is the honest answer on who each option is for. The 12-month window is for the borrower whose last year was the strongest year: a founder whose revenue jumped, a physician who just made partner, an attorney whose book of business is still climbing. The 24-month window is for the borrower whose income moves in cycles, or whose most recent year was a dip against a stronger prior year that the lender should still see. Neither is “safer.” The better choice is the one that describes your income accurately, and in practice your broker runs both calculations before you commit.
Side-by-Side
The table below compares the two windows on how they are typically structured across select wholesale programs, subject to full underwriting. It carries no pricing rows by design.
| Factor | 12 Months | 24 Months |
|---|---|---|
| Review basis | Eligible deposits ÷ 12 | Eligible deposits ÷ 24 |
| Income trend | Rewards a rising year | Smooths lumps and seasons |
| Documentation | 12 consecutive statements | 24 consecutive statements |
| Review burden | Fewer months to screen | More months to screen and explain |
| Program availability | Portfolio non-QM and bank programs | Portfolio non-QM program |
| Account types | Personal or business | Personal or business |
| Property types | Same program rules apply | Same program rules apply |
| Entity vesting | Typically vested in the individual | Typically vested in the individual |
| Reserves | Set by loan size, not window | Set by loan size, not window |
Two rows deserve a note. Reserves and loan size limits follow the program and the balance, so choosing 24 months never unlocks a bigger loan on its own. And vesting on personal-statement files usually runs through the individual borrower, because the income being counted is yours.
Key Terms Defined
Super jumbo: a loan well beyond the conforming limit. No regulator defines the term. For scale, FHFA announced a $832,750 baseline conforming limit, with a $1,249,125 ceiling in high-cost areas.
Bank statement loan: a mortgage where the lender averages your deposits over a set window instead of relying on traditional personal-income documentation.
Eligible deposits: deposits that count as your income. Transfers between your own accounts, loan proceeds, refunds, and one-time windfalls come out first.
Expense ratio: the share of business deposits treated as operating cost. It is a business-account step and does not typically apply the same way to personal statements.
Lookback window: the number of consecutive months of statements the lender reads, here 12 or 24.
How Personal Statements Become Qualifying Income
The math is short. The underwriter pulls every page of every statement in the window, strips out ineligible deposits, adds up what remains, and divides by 12 or 24. That monthly figure feeds your debt-to-income ratio, which runs up to 50% on the programs we place files with. Credit, assets, reserves, and the appraisal are underwritten separately.
Trade press describes the same basic shape. Scotsman Guide describes a self-employed borrower with no W-2 who supplies 12 to 24 months of personal or business bank statements.
Personal versus business matters here. On business statements, the program applies an expense ratio that varies with the type and size of the business, or a ratio supplied by your accountant. Business statements also need at least 25% ownership. On personal statements, deposits are read much closer to net, which is why many high earners prefer them. Transfers between your own personal accounts are stripped out, but transfers from your own business into your personal account are the exception and count in full, which is the cleanest way to bring business cash onto personal statements.
Deposits cannot be counted blindly under either window. Federal guidance for lenders says a creditor relying on an inflow of funds must confirm those deposits are the consumer’s income. That is why underwriters ask about large, unusual deposits.
Three Income Profiles Through Both Windows
These are illustrative patterns, not real files, and they use ratios rather than dollars.
Rising income. Say your most recent year ran about 75% above the year before. A 12-month average captures only the strong year. A 24-month average blends in the lean year and lands noticeably lower. Twelve months wins.
Flat or seasonal income. Say a year-round stretch looks like the one before it, or your receipts bunch into a few big months. Both windows produce similar averages, but 24 months shows the lender a full pair of cycles and makes one big quarter look like what it is: part of a pattern. Twenty-four months is the cleaner story.
Falling or lumpy income. Say a strong first year gave way to a soft second. A 24-month average looks better on paper than the recent run-rate, but an underwriter reads the trend, not just the average. A 12-month window shows the soft year alone. Neither flatters you. This is where an asset-based path or a profit-and-loss method may deserve a look.
One practitioner habit is worth copying. A loan officer who knows the product runs both calculations and presents whichever supports the stronger, more defensible file. Mbanc’s illustration of a borrower going from $200,000 to $350,000 shows the same effect: $350,000 on a 12-month basis against $275,000 on 24. Treat it as one lender’s example.
When 12 Months Is the Better Fit
Choose 12 months when your recent year is your honest run-rate. That covers a growing practice, a business past its startup phase, or a borrower whose older months were leaner for a reason that no longer applies, such as a new contract or a partnership promotion.
Twelve months also means fewer statements to screen and explain. It is the window the bank portfolio program uses for the largest balances. That program carries files to $30,000,000 on its own ladder, at 65% to $5,000,000, 60% to $10,000,000, and 55% to $30,000,000, and every file above $4,000,000 is reviewed case by case before submission. Those figures run through select wholesale programs, subject to full underwriting.
The catch: a single outsized deposit weighs more in a shorter window. One windfall spread over 12 months moves the average twice as much as it would over 24. Underwriters know this and screen for it.
When 24 Months Is the Better Fit
Choose 24 months when stability is the selling point or when your income swings. Seasonal businesses, commission-heavy professionals, athletes and entertainers with uneven payment schedules, and investors whose receipts arrive in large irregular chunks tend to look better across two full cycles.
Twenty-four months is available on the portfolio non-QM program, which carries files from $300,000 to $6,000,000. Leverage on a primary residence through that program steps down with size: typically 90% to $1,000,000, 85% to $2,000,000, 80% to $3,000,000, and 75% at the top credit tier to $4,000,000, then case-by-case review to $6,000,000. Second homes and investment property take their own ladders, which run lower at most sizes. The window you pick does not move any of those ceilings.
The catch: more months means more deposits to explain. If your accounts are messy, 24 months gives an underwriter twice the chances to find something that needs a letter.
What Changes at Super Jumbo Size
The window does not change; the scrutiny does. Credit floors differ by program: 660 on the portfolio program, 680 on the bank program, and 700 above the super-jumbo line, which sits at $3,500,000 on a primary residence and $3,000,000 on a second home or investment property. Above that line, additional overlays apply, including a 0x30x24 housing history and 48-month seasoning on any credit event.
Reserves run 3 months to $500,000, 6 months to $1,500,000, and 9 months above, with cash-out proceeds unable to satisfy them at super-jumbo size.
Deposit Hygiene Before You Apply
Under either window, clean statements win. Keep income flowing into one primary account. Limit transfers between your own accounts. Avoid large one-off deposits in the months you will submit, or document them in writing. Include every page of every statement, even blank ones, because skipped pages trigger requests for more paperwork. Statements must be consecutive, and a transaction history never substitutes for them.
If you run a business, consider moving operating profit to your personal account on a regular schedule well before applying. Funds that sit in a business account typically get prorated by your ownership share, so personal-account transfers are cleaner.
If Neither Window Fits
Some borrowers are better served by a different path entirely. A profit-and-loss method, capped at 80% of the qualifying figure, can work when a third party prepared the statement. Federal guidance treats self-supplied P&Ls as reliable to the extent an appropriate third party has reviewed them.
An asset allowance divides liquid assets by 36, 60, or 84 months, and assets-only qualification needs liquid assets equal to the loan amount plus closing costs. Both are for primary and second homes. If you are buying a rental, a DSCR loan is reviewed primarily on property-level rental income covering the payment, subject to lender guidelines, with no bank statement window involved. Programs below 1.00 coverage exist through select lenders in the network, with leverage and terms adjusting. For the basics, see the complete DSCR loans guide.
The Verdict
Run both windows on your own deposits. If the 12-month figure beats the 24-month figure and your recent year is your real run-rate, take 12. If your income moves in cycles, or you want a longer record behind a very large balance, take 24. If both land short, look at assets or a P&L. And remember that no regulator sets the 12-versus-24 rule: the program does, so the real question is which windows your target program accepts at your loan size.
Frequently Asked Questions
Can I choose the window myself?
Often, yes, within what the program offers. The portfolio non-QM program accepts 12 or 24 months, while the bank portfolio program uses 12. Your broker should run both and show you the difference.
Does 24 months let me borrow more?
No. Loan size limits and leverage ceilings follow the balance, occupancy, and credit tier, not the statement window. The window only changes the income figure.
Do personal statements get an expense deduction?
Generally not in the way business statements do. The expense ratio is a business-account step, so personal deposits are read closer to net eligible deposits. Underwriters still remove transfers and one-time items.
What if my income dipped recently?
A 12-month window will show the dip fully, and 24 months may soften it on paper while the trend still gets read. An asset-based or P&L path may fit better, subject to lender guidelines.
Are these no-doc loans?
No. Income is reviewed on documented deposits under the applicable program, and the lender still reviews whether the loan can be repaid. Business-purpose investor loans are reviewed differently from standard owner-occupied mortgages, but documentation still matters.
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. Programs change, every file is underwritten individually, and nothing here is a commitment to lend. Tax treatment varies; consult a qualified professional.
Lendmire’s self-employed mortgages page presents both super jumbo programs, bank statement and DSCR, side by side.
About Lendmire
Lendmire is a DSCR-focused mortgage brokerage, NMLS# 2371349, placing investor loans across 41 markets, including Washington, D.C. DSCR eligibility is generally reviewed by the lender around a property’s rental income rather than personal income documentation, which fits LLC-held rentals, self-employed investors, and portfolios scaling past conventional financed-property limits.
Scotsman Guide named Lendmire a Top Mortgage Workplace in 2026.
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References
1. Scotsman Guide, Rev Up the Engine for Non-QM Lending
2. Mbanc, 12 vs 24 months of bank statements
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 a Retiree With No Job Get a Super Jumbo Bank Statement Loan? · Super Jumbo Bank Statements vs Adding Retirement Account Assets · 12 vs. 24 Months on a Super Jumbo Bank Statement Loan With Mixed Accounts
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
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Compliance and disclosures. Lendmire (NMLS# 2371349) is a licensed mortgage broker and is not a direct lender, depository institution, financial advisor, or tax professional. Content in this article is general market analysis and educational information — not financial, legal, or tax advice for any specific situation. Lendmire does not guarantee loan approval; every transaction is subject to underwriting by the funding lender. Mortgage pricing and loan program guidelines are subject to change at any time without notice and vary by borrower characteristics, property type, and state regulations. Lendmire complies with Equal Housing Opportunity. Licensure verification: NMLS Consumer Access.