The Quick Read: Usually yes, when the program you refinance into offers more than one statement window, because a refinance is a brand-new loan with its own underwriting and the window from your old loan does not carry over. The new lender’s program sheet decides which windows are allowed, and the lender, not you, makes the final call on what it will use.
- A refinance is a fresh application, so you choose a program first and the window second.
- Statements are a rolling set of the most recent months, so your old loan’s statements are stale anyway.
- Rising deposits tend to favor a shorter window. Lumpy or seasonal income often favors a longer one.
- Switching between business and personal statements changes the math, not just the month count.
- If the property is a non-owner-occupied rental, a DSCR loan may remove the question entirely.
What follows is how these files work across the programs Lendmire places, plus what the rules on the new loan require.
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Why a Refinance Lets You Reset the Window
A refinance pays off the old mortgage with a new one. New loan, new application, new underwriting. Nothing in the old file binds the new one.
That is why the statement window is not “locked in.” Your original loan used a set of months that ended around its own application date. Those months are history. The new lender wants the most recent consecutive months leading up to your new application.
Programs typically ask for 12 months of business or personal bank statements. Some lenders in the wholesale network also take a longer look-back, and the program sheet says which. Scotsman Guide describes self-employed borrowers supplying 12 to 24 months of personal or business statements, with a standard expense factor applied to the deposits. That piece is a few years old, so treat it as a description of the concept, not a current rulebook.
Does any rule fix the number of months? No. The rule on repayment ability only requires a reasonable, good-faith determination, verified with reliable third-party records. Bank statements are those records. The window is a lender underwriting choice, not a legal mandate. You can read the verification language in 12 CFR 1026.43 at the eCFR.
What the Switching Options Look Like
Four moves come up. Each changes something different.
| Switch | Usually done when | What changes | Watch-out |
|---|---|---|---|
| Short to long window | Income is lumpy or seasonal | Averages in older months | Weak months drag the number |
| Long to short window | Deposits have grown | Drops older, lower months | Needs a clean recent record |
| Business to personal | Business has low expenses | Removes expense factor | Deposits must trace to income |
| Personal to business | Personal deposits are mixed | Applies expense factor | Usable income may fall |
Two cautions. First, many programs allow one account type per file and do not let you blend them. Second, some programs offer only one window. Then the choice is not yours at all.
How to Decide: Follow the Trend
The right window depends on the direction of your deposits.
Deposits are rising. The shorter window usually produces the higher average, because it leaves out older, weaker months. A longer window pulls those months back in.
Deposits are choppy or seasonal. A longer window smooths the swings. One slow quarter distorts a long average less than a short one.
Deposits are falling. Neither window flatters you. The most recent months are the weak ones, and a short window will not hide that. A longer window may look better, or the file may not work under either.
A big one-time deposit landed recently. A short window gives it more weight. Underwriters often strip one-time windfalls, so do not count on it.
Run both and compare. That is the single most useful habit on these files. Many lenders will run both calculations if you ask.
A Worked Example
Say a self-employed borrower’s eligible monthly deposits climbed steadily over the last year. Run the numbers on the shorter window, and the average sits noticeably above the longer window’s average, perhaps by a margin that moves the debt-to-income picture from tight to comfortable. Flip the story: a borrower with one very strong quarter and several soft ones might see the longer window pull the average toward the middle, which lowers the peak but steadies the file.
The lesson is not which window is “better.” It is that the same borrower can qualify at meaningfully different income levels depending on the lookback. These figures are illustrative only. Every file is underwritten individually, and qualifying income comes from deposit averages with lender-specific expense factors. No universal formula applies.
Personal vs. Business Statements at Refinance
Personal statements are generally read close to raw eligible deposits. Business statements get an expense factor, which is the portion of deposits the lender assumes goes to running the business. The factor varies by lender. Where a program allows it, an accountant-prepared expense statement or profit-and-loss can support a lower factor than the lender’s default.
So personal statements often show more income. But the deposits still have to trace back to business income, and low-expense businesses benefit most.
Mixed accounts complicate things. If personal and business money flow through the same account, the underwriter has to sort the deposits. That can add paperwork or shrink the usable figure. Transfers between your own accounts, refunds, and one-time windfalls come out either way.
How Switching Works in Practice
1. Pick the program, then the window. Read the program sheet for allowed windows, account types, and minimum time in business.
2. Pull the current statement set. Gather consecutive months ending near your application date.
3. Classify the account. Personal or business, because the expense treatment differs.
4. Strip ineligible items. Remove transfers, refunds, and one-time deposits.
5. Average. Eligible deposits, after any expense factor, are divided by the number of months in the window.
6. Run the full file. Debt-to-income, credit, reserves (commonly around 6 months of the housing payment), and the property all get reviewed under the new program.
Mid-File Switches and Timing
Can you change windows after you have applied? Sometimes. If a file is already in underwriting, switching means re-running the average and explaining any new months that enter the picture. The lender decides whether that is workable.
Timing matters too. Statements have to be fresh. Waiting a month or two can change which months fall inside the window, and sometimes that moves the number in your favor. A bank change, a gap in statements, or a newly opened account needs explaining. Consecutive months are the norm.
Risks, Limits, and Lender Discretion
Switching is not free money. A few real downsides:
- A different lender may use a different expense factor, shifting your income even on the same deposits.
- A longer window shows older activity you may not want scrutinized.
- More months means more documents to gather and explain.
- Each lender sets its own minimum time in business.
Across the wholesale network, guidelines vary by lender, and the strictest overlays can be tighter than the typical program. Cash-out limits differ from purchase limits too. On an owner-occupied cash-out, leverage tops out around 80% LTV with a fixed expense ratio (75% LTV with an accountant-prepared ratio), depending on loan size and credit. On a primary residence purchase or rate-and-term refinance, leverage can reach up to 90% LTV through select lenders, and the strongest files earn the top of that range. Loan sizes run roughly $125,000 to $3,500,000, all subject to lender guidelines.
When Switching Isn’t the Answer
Sometimes the window is the wrong question. If the loan is on a non-owner-occupied rental, ask first whether you need statement-based income at all. A DSCR loan is reviewed primarily on property-level rental income covering the payment, subject to lender guidelines. Investment-property cash-out on bank-statement documentation tops out around 75% LTV, and investment purchase leverage varies by lender.
There is a bigger reason investors drift toward DSCR. A bank statement loan tests you, so qualifying income caps the total debt you can carry, and every added mortgage raises your debt load. A DSCR loan reads each rental on its own rent against its own payment. Many self-employed investors use both: statements for a primary residence or second home, DSCR for the rentals. Lendmire’s complete DSCR loans guide covers how the property-level test works.
Occupancy also decides the paperwork. An owner-occupied refinance 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 business-purpose and exempt from those disclosures. Know which one your property is before you compare programs.
If neither route works today, an asset-depletion option qualifies from liquid assets and reaches about 80% LTV on a primary residence. Or wait a few months and let stronger deposits roll into the window. Every figure here varies by lender and program — guidelines, property type, leverage, and credit profile all apply.
If you are weighing a conventional loan against staying put, Lendmire’s piece Conventional Refinance vs Staying in a Bank Statement Loan: When to Switch walks through that decision. And if your deposits have moved recently, see how to refinance a bank statement loan when deposits have shifted.
Prep Checklist Before You Refinance
- Keep business and personal deposits in separate accounts where you can.
- Label transfers so an underwriter can sort them in seconds.
- Avoid large, unexplained deposits in the months ahead of applying.
- Gather every page of every statement, including blank pages.
- Calculate your own average under both windows before you shop.
- Ask each lender which windows, account types, and expense factors its program allows.
Key Terms Defined
Look-back window: The number of consecutive recent months of statements a lender reviews to calculate income.
Qualifying deposits: Deposits the lender counts as income after removing transfers, refunds, and one-time windfalls.
Expense factor: The share of business-account deposits the lender assumes goes to operating costs rather than your income.
Seasoning: A waiting period or required history, such as time in business or time owning a property.
Frequently Asked Questions
Do I have to use the same window as my current loan?
No. A refinance is a new loan, so the new lender’s program sheet sets the options. If the program offers more than one window, you can usually choose, though the lender makes the final call.
Can I switch windows after I’ve applied?
Sometimes. The lender has to re-run the average and may ask you to explain new months or deposits. Whether it is workable depends on the lender and where the file stands.
Can I switch from business to personal statements?
Often, if the program allows it. Business statements carry an expense factor and personal statements generally do not, so the income calculation changes. Many programs will not let you mix both on one file.
Will switching hurt my approval odds?
Not by itself. What matters is the trend in your deposits, your credit, reserves, and the property. A window that flatters your income can help, while a longer one may expose a slump.
Does a refinance need fewer statements than a purchase?
Not as a rule. Documentation requirements come from the program, not from whether the loan is a purchase or a refinance. Confirm the months required on the specific program sheet.
Qualification is subject to lender guidelines and full underwriting, and nothing here is a commitment to lend. Tax treatment varies; consult a qualified professional.
About Lendmire
Lendmire, NMLS# 2371349, is a mortgage brokerage with consumer lending licenses in 16 states. Bank statement, P&L-only, 1099-only and asset-based mortgages are arranged through wholesale lending partners for borrowers whose tax returns understate their income, and each application is reviewed individually by the lender. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.
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References
1. Scotsman Guide, “Rev Up the Engine for Non-QM Lending”
This article is part of Lendmire’s bank statement loan program — full qualification details, guidelines, and scenarios live on the program page.
Related reading: How a Bank Statement Jumbo Loan Works in Santa Fe · How to Switch a Rental Purchase From Bank Statement to DSCR · Can You Combine W-2 Income With Bank Statement Income on a Jumbo Loan?
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.