Lenders Choose Between Statement Periods On A Bank Statement Loan — The Quick Read: Most programs pick either a 12-month or a 24-month lookback window, not both, and the choice usually comes down to which period produces higher qualifying income without hiding risk the underwriter needs to see. A borrower whose business is trending up usually wins with 12 months. A borrower with a lumpy or seasonal income pattern usually does better with 24. Loan size and self-employment history can force the decision either way.
There’s no rulebook that hands a lender a fixed answer. Bank statement loans are non-QM products, and the length of the deposit review window is a program design choice each lender makes on its own — not a number set by regulation. That’s the honest starting point for anyone shopping this type of financing.
Key Terms Defined
Lookback period — the number of consecutive months of bank statements a lender reviews to calculate qualifying income, most commonly 12 or 24.
Expense factor — a percentage a lender subtracts from business-account deposits to estimate overhead, payroll, and materials before counting the rest as income.
Qualifying income — the single monthly income figure a lender arrives at after totaling eligible deposits, applying an expense factor if needed, and dividing by the number of months in the lookback period.
Debt-to-income ratio (DTI) — the borrower’s total monthly debt divided by qualifying income, used to size the loan the same way it would on any conventional file.
DSCR (debt service coverage ratio) — a separate qualification method used on investment-property loans that compares the property’s own rental income to its monthly obligation, rather than relying on the borrower’s personal deposits at all.
How the Statement Period Actually Gets Chosen
Across the wholesale programs Lendmire places files with, the lookback window is set at the program level first, then confirmed against the borrower’s specific numbers before submission. A loan officer typically runs the borrower’s deposits both ways — 12 months and 24 — and submits whichever calculation produces a qualifying income the borrower can actually use, as long as the file still meets that program’s eligibility rules.
That’s the practical mechanic most borrowers never see. It isn’t arbitrary. A 24-month average smooths out one strong quarter or one weak quarter, which protects a lender from overstating income based on a fluke. A 12-month program does the opposite: it drops older, weaker months out of the average, which rewards a business that’s genuinely improving. Trade coverage of the non-QM sector describes this range — averaging 12 to 24 months of income deposits — as the market standard rather than something any single regulator mandates, per Scotsman Guide’s reporting on non-QM lending trends.
The Calculation, Step by Step
Every bank statement file goes through roughly the same math, regardless of which window gets chosen.
1. Pick the window. Twelve or twenty-four consecutive months — never blended within one calculation.
2. Classify the account. Personal deposits and business deposits get treated very differently in the next step.
3. Total and screen deposits. Transfers, one-time windfalls, and unsourced cash deposits typically get excluded before anything gets averaged.
4. Apply an expense factor to business accounts. Across Lendmire’s network, this usually lands at a fixed rate for a service business with no employees, a higher fixed rate for a business with a small staff, or a still-higher rate for a larger staff or any business selling a physical product — though an accountant-prepared ratio or a profit-and-loss method can sometimes override the default, capped well below full deposits, subject to underwriting.
5. Average the result into one monthly qualifying-income figure, which then feeds standard DTI math.
Transfers from the borrower’s own business into a personal account generally count in full, at 100%, since that money already passed through the expense factor on the business side. A borrower needs at least 25% ownership in a business for its statements to count toward qualifying income at all, across most of the programs in Lendmire’s network.
When 12 Months Wins
A shorter window helps a borrower whose income is climbing, because the weaker or older months simply don’t get counted. Someone whose business grew meaningfully in the past year, or who only has 12 months of self-employment history in the first place, generally has to use — or benefits most from — the 12-month path. Most bank statement programs still expect roughly two years of documented self-employment overall, so a genuinely new business may need program-specific eligibility confirmation before a 12-month file even gets submitted.
When 24 Months Wins
A longer window helps a borrower whose income is stable or seasonal, because it prevents one strong recent stretch from looking artificially inflated, and it prevents one recent soft patch from tanking the average either. Underwriters reviewing larger loan files also tend to put more weight on a longer track record: two years of consistent deposits at the qualifying level often reads as lower risk than twelve strong months with no history behind them, particularly once a loan moves into seven figures and above.
| Scenario | Better fit |
|---|---|
| Business trending upward recently | 12-month window |
| Stable or seasonal income pattern | 24-month window |
| Only 12 months of self-employment history | 12-month window (program-dependent) |
| Larger loan amount, longer track record available | 24-month window often preferred |
| A weak stretch fell 18-24 months ago | 12-month window avoids pulling it into the average |
Neither window is inherently “safer.” The one that produces a defensible, higher qualifying income for that specific borrower is usually the right one — which is exactly why a good loan officer runs both before choosing.
Personal vs. Business Accounts — Why It Changes the Math
Lenders classify each account before they average anything. This classification decides which rules apply for the rest of the calculation. Personal-account deposits usually get counted without an expense factor, since they don’t carry assumed business overhead. Business-account deposits go through the expense-factor reduction described above. That’s because gross deposits into a business account include money the owner never actually takes home.
Comingled accounts mix personal and business income in one place. Across Lendmire’s network, these accounts typically get force-classified as business accounts, since the deposits can’t be cleanly separated once mixed. Borrowers should know this before deciding which accounts to route income through on an application. The account strategy conversation works far better before applying than after underwriting has already started.
Where This Gets Complicated: Loan Size, Prior Down Years, and Declining Trends
Bigger loans change the calculus. Once a file moves into higher loan amounts, underwriters tend to scrutinize documentation more closely, and a longer, consistent history can outweigh a shorter period showing stronger recent numbers — even when the 12-month math technically produces a higher figure. That tension is real, and it’s part of why every file above roughly $4,000,000 in Lendmire’s network gets reviewed case by case before submission rather than run through a standard formula.
A prior down year creates the opposite problem for the 24-month path. If a borrower had a slow stretch 18 to 24 months back — a new business launch, an industry disruption, a rough year — pulling those months into a 24-month average drags the whole qualifying figure down, even if the last 12 months were strong. In that scenario, the 12-month window is often both the more accurate and the more favorable choice.
Declining recent deposits create a different restriction. If the most recent months in a file show a meaningful downward trend, underwriters generally won’t just let the borrower choose the friendlier window. A sustained decline can push the file toward a shorter recent review period than the borrower originally wanted, or trigger a written explanation requirement before the file can move forward. Treatment here varies by lender, but the pattern is consistent: recent, real weakness tends to override borrower preference on which window applies.
Lendmire has run self-employed files through multiple wholesale lenders. This experience shows that the account-strategy conversation matters more than most borrowers expect going in. Two borrowers with identical annual income can land in very different qualifying-income brackets. The difference comes down to which accounts they routed deposits through and which 12 months fell inside the window. That’s exactly why running both calculations before submission, rather than guessing, tends to produce the stronger outcome.
Bank Statement Loans vs. DSCR: A Different Track Entirely
For an investor buying or refinancing a rental property, the statement-period decision often doesn’t apply at all. DSCR loans qualify primarily on the property’s own rental income covering the payment, subject to lender guidelines — not on the borrower’s personal or business deposit history. Lendmire’s complete DSCR loans guide covers how that qualification path works in more depth.
This distinction matters because many rental-property investors are self-employed operators or LLC owners. Their traditional personal-income documentation often understates their real cash flow. This is exactly the population non-QM lending was built to serve. Roughly 15 million Americans, close to 10% of the workforce, now classify themselves as self-employed. A growing share of them rely on non-QM underwriting to document income that lenders would otherwise struggle to verify from a tax return.
On a DSCR file, the qualifying figure typically comes from an appraiser’s rent conclusion rather than from bank deposits at all. Appraisers document market rent on the Fannie Mae Form 1007 rent schedule for a single-family rental. They compare the subject property against similar rentals nearby. Standard DSCR practice generally uses the more conservative figure between the appraiser’s market-rent conclusion and the actual signed lease, rather than simply honoring whatever the lease says. A property with an active short-term rental history doesn’t get to annualize nightly rates on this form either. Appraisers are expected to rely on comparable monthly-lease data instead of a nightly-rate multiplication.
For a borrower who needs to finance a primary residence using deposit-based income, the statement-period choice still matters enormously. For that same borrower buying an investment property, it often doesn’t come into play at all. Anyone weighing a bank statement loan against a rental-property purchase should read up on how DSCR loans and bank statement loans differ before choosing a path, since the two programs solve different qualification problems.
What Sizes and Leverage Look Like
Bank statement financing through Lendmire’s wholesale network runs from $300,000 to $30,000,000 across two overlapping programs — a portfolio non-QM program carrying files to $6,000,000, and a bank portfolio jumbo program that carries twelve-month-statement files on its own ladder above $4,000,000, stepping down to roughly 65% loan-to-value near $5,000,000, 60% near $10,000,000, and 55% up to $30,000,000, subject to underwriting.
On a primary residence, leverage steps down as loan size climbs: typically around 90% loan-to-value near $1,000,000, 85% near $2,000,000, and 80% around $3,000,000 at the top credit tiers, before moving to case-by-case review above roughly $4,000,000. Second homes and investment properties generally run about five points lower than a comparable primary-residence file at every size band. Credit score expectations start around a 660 floor on the portfolio program and move toward 700 once a file crosses into the super-jumbo range, with debt-to-income allowed up to 50% and reserve requirements that typically run three months on smaller loans, climbing to nine months or more as loan size increases — all subject to lender guidelines and full underwriting.
DSCR loans are business-purpose investment financing. Because they’re not consumer mortgages, they’re reviewed under different rules than a standard owner-occupied loan, and they fall outside the TRID consumer-disclosure timeline that governs a personal home purchase.
Tax treatment can depend on how loan proceeds are used and how the property is titled; investors should keep clear records and talk with a qualified tax professional before relying on any deduction.
If you’re weighing a bank statement loan for a primary residence against a rental-property purchase that might qualify differently, Lendmire can help you compare options based on income documentation, leverage, credit profile, and investor goals. Reach the team at 828-256-2183 or request a quote directly.
Frequently Asked Questions
Can I choose which statement period I want, or does the lender decide? Both, in practice. A loan officer typically calculates qualifying income both ways and submits whichever period the borrower’s file supports, but recent declining deposits or a short self-employment history can limit which window is actually available.
Does a 24-month statement period always mean better pricing? Not necessarily, and program pricing isn’t something this article can speak to directly. What’s true across most non-QM lending is that a longer, consistent history can reduce a lender’s perceived risk on a file, but the specific impact varies by program and loan size.
What if my personal and business accounts are mixed together? Standard practice treats a comingled account as a business account, applying the expense-factor reduction to the whole thing rather than splitting deposits by source, since business and personal money can’t be cleanly separated once they’ve been combined.
Do I need two years of self-employment to use a bank statement loan? Most programs expect it, though a 12-month statement path can sometimes work with as little as one year of documented self-employment history, subject to lender guidelines and program-specific eligibility review.
Does the statement-period decision matter for a rental property purchase? Usually not directly. DSCR loans qualify primarily on the property’s own rental income, established through an appraisal rent schedule, rather than the investor’s personal bank deposits — a separate underwriting track from a bank statement loan on a primary residence.
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 is a non-QM mortgage brokerage (NMLS# 2371349) arranging DSCR investor loans in 40 markets, including Washington, D.C. DSCR eligibility is generally reviewed around property-level rental income rather than personal income, subject to lender and program guidelines, a fit for self-employed investors and LLC-owned portfolios. Lendmire was recognized as a Scotsman Guide Top Mortgage Workplace in 2025 and 2026.
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 – Which groups are driving non-QM lending?
2. getblueprint.io – What Is Form 1007?
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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Disclosures. The information presented in this article is general market commentary, not financial, legal, or tax advice. Lendmire is a mortgage brokerage (NMLS# 2371349) — not a direct lender or depository institution — and loan placement is subject to lender underwriting. Nothing in this content represents a commitment to lend. Loan terms, pricing, and program availability vary based on borrower qualifications, property characteristics, and state of subject property, and are subject to change at any time. Lendmire complies with Equal Housing Opportunity requirements. Consumer access: nmlsconsumeraccess.org.
