The Quick Read: Underwriters add up twelve consecutive months of eligible deposits, remove transfers, loan proceeds, refunds and one-time credits, apply an expense ratio to business deposits, and divide the result by twelve to get one monthly qualifying income figure. That figure then feeds the debt-to-income test, credit review and reserve requirements. The exact numbers vary by lender and program and follow a full review of property, leverage, and credit.
- Personal-account deposits are read close to face value, while business deposits are reduced by an expense ratio.
- Through select wholesale programs, the fixed ratios are typically 20%, 40% or 50%, depending on the business. An accountant-provided ratio can replace the fixed one if the lender accepts it.
- Debt-to-income can run up to 50% on most files, subject to full underwriting.
- Above $4,000,000, every file is reviewed case by case before submission.
This guide walks the math from raw deposits to the final number, then shows where the general rule bends. It is written for founders, physicians, attorneys, consultants and investors whose traditional personal-income documentation understates what actually comes in.
Why a Jumbo File Uses Deposits Instead of Tax Returns
A jumbo loan is a loan above the federal conforming limit. Self-employed borrowers often carry large balances and report modest taxable income, because depreciation, interest and pass-through deductions shrink the bottom line. Bank statements show the cash that actually moved.
Trade press describes this as a non-QM path built for creditworthy borrowers whose returns do not reflect cash flow. Scotsman Guide notes that typical files use twelve to twenty-four months of statements with consistent monthly deposits. A tax-return approach averages net income after write-offs. A deposit approach starts with gross receipts and then removes what should not count.
Across Lendmire’s wholesale network, the same self-employed borrower can look very different under these two methods. That gap is the reason the program exists. It is also why the details below matter so much.
Key Terms Defined
Eligible deposits: Deposits left after underwriting removes transfers between your own accounts, loan proceeds, refunds and one-time credits it cannot tie to income.
Expense ratio: The share of business deposits treated as the cost of running the business, so only the remainder counts as your income.
Qualifying income: The monthly figure produced after the ratio and the divisor are applied. It is the number used in the debt-to-income test.
Divisor: The count of statement months, which is twelve on a twelve-month file.
Debt-to-income (DTI): Your monthly debt obligations, including the new housing payment, divided by qualifying monthly income.
The Formula in Four Steps
Most programs we place files with follow the same sequence. The inputs differ, but the order does not.
1. Choose the account type and window. Twelve consecutive, complete statements, every page, from personal or business accounts. Transaction histories never substitute for statements.
2. Sort the deposits. Remove transfers between your own accounts, loan proceeds, refunds and one-time credits. Large or unusual deposits get a sourcing review.
3. Apply the expense ratio to business deposits. The program sets it, based on the business type and staffing. You do not pick it.
4. Divide by the statement months. On a twelve-month file, qualifying monthly income is eligible deposits, less the expense share, divided by twelve.
In words, the formula is eligible deposits times the share kept after expenses, divided by twelve. If you own only part of a business, income is prorated to your share, and business statements typically require at least 25% ownership.
Worked Example: From Raw Deposits to One Number
The figures below are modeled assumptions for illustration. They are not Lendmire figures or market data.
Say a borrower’s business account shows total deposits over twelve months. Underwriting sorts them like this:
| Line item | Annual amount | Treatment |
|---|---|---|
| Gross deposits | $480,000 | Starting point |
| Transfers between own accounts | $25,000 | Removed |
| Loan proceeds | $20,000 | Removed |
| Refunds and reversals | $8,000 | Removed |
| One-time unsourced credit | $7,000 | Removed |
| Eligible deposits | $420,000 | Carried forward |
The $420,000 is then multiplied by the share kept after the expense ratio. The table below shows how much the ratio alone moves the result.
| Scenario | Share of deposits kept | Annual qualifying income |
|---|---|---|
| Personal statements | 100% | $420,000 |
| 20% expense ratio | 80% | $336,000 |
| 40% expense ratio | 60% | $252,000 |
| 50% expense ratio | 50% | $210,000 |
Monthly qualifying income is one-twelfth of whichever annual figure applies. Same deposits, same borrower, and the result moves by a factor of two. That sensitivity is why the account choice and the ratio deserve attention before you apply, not after.
Business Statements vs. Personal Statements
Personal statements are generally read near face value after exclusions. Business statements start as gross revenue, so the program trims them with the expense ratio. Borrowers often assume personal statements always win, and that is not always true.
| Factor | Business statements | Personal statements |
|---|---|---|
| Expense ratio | Applied (20%-50% fixed) | Generally none |
| Ownership proof | At least 25% ownership | Not the main test |
| Mixed funds | Personal spending hurts the file | Business money must be explainable |
| Owner transfers | Count at 100% once in personal account | Count at 100% |
Transfers from your own business into your personal account count in full on a personal-statement file. That means the same cash can be measured two ways, so some programs ask for a few business statements to confirm the accounts are separate. Mixed or commingled accounts invite extra questions, and every account you rely on has to be documented.
An accountant-provided ratio can replace the fixed 20%, 40% or 50% where the lender accepts it. Asset-heavy businesses are the usual case, because a flat ratio can overstate their costs, a point Scotsman Guide also raises about one-size-fits-all expense treatment. Acceptance is the lender’s decision, and the borrower cannot self-certify.
How a 12-Month Window Behaves
The twelve-month window gives you one average. It does not weight recent months more heavily unless the underwriter chooses to trend the file. That has real consequences.
- Growing income: Twelve months captures recent strength better than twenty-four, because older, lower months drag the average down less.
- Lumpy or seasonal income: Seasonal peaks and troughs are averaged into one figure, so a strong quarter carries a weak one.
- Declining income: If the later months run clearly below the earlier ones, underwriters may use a lower or shorter average. Expect questions and a letter of explanation.
- One large deposit: A single outsized credit is either sourced and explained or removed. It is rarely left in unexamined.
- A missing month: Statements must be consecutive. A gap breaks the window.
| Situation | Twelve months | Twenty-four months |
|---|---|---|
| Rising income | Usually stronger | Older months dilute it |
| One strong recent year | Captures it fully | Averages in the prior year |
| Declining income | Shows the dip sooner | May soften a recent drop |
| Documentation burden | Lighter | Heavier |
Lendmire’s piece How Income Is Calculated For A 12-month Bank Statement Loan? covers the general method.
From Qualifying Income to the DTI Test
Qualifying income is only the numerator’s partner. The test is your monthly obligations divided by that monthly income. Obligations include the proposed housing payment and your other debts.
Through select wholesale programs, DTI can reach 50% on most files, subject to full underwriting. Run the earlier example through it. A file sitting at a 50% DTI under the 50% expense ratio would sit near 31% under the 20% ratio, because the income base is 1.6 times larger. The loan did not change. The documentation did.
Size then matters. Through select wholesale programs, leverage on a primary residence purchase typically steps down as the loan grows: up to 90% to $1,000,000, 85% to $2,000,000, and 80% to $3,000,000. The top credit tier reaches 75% to $4,000,000. Second homes and investment property typically run about five points lower at every size, all subject to underwriting.
Above $4,000,000, everything is reviewed case by case before submission. A bank portfolio program carries twelve-month-statement files to $30,000,000, and on review its ladder runs about 65% to $5,000,000, 60% to $10,000,000 and 55% to $30,000,000.
Other file requirements run alongside the income math:
- Credit: A 660 floor on the portfolio non-QM program, 680 on the bank program, and 700 above the super-jumbo line.
- Reserves: Typically 3 months up to $500,000, 6 months up to $1,500,000, and 9 months above that.
- Cash-out: Unlimited proceeds at or below 60% LTV, with a $1,500,000 cash-in-hand cap above 60% on the portfolio program.
Where the General Rule Breaks
The standard formula covers most files. These cases bend it.
A documented lower expense ratio. A CPA-prepared statement or a P&L can replace the flat ratio, but only if the program accepts it. Ask early.
Pass-through businesses. A contractor whose deposits include subcontractor payments may need those excluded or a heavier ratio. Pass-throughs are not your income, and underwriters treat them that way.
Owner transfers. These count at 100% on personal-statement files. Some programs treat them differently, so confirm before you choose the account.
Part ownership. Income is prorated to your share, and below the ownership minimum the business statements cannot be used.
Asset-based paths. If deposits do not tell the story, two other routes exist on primary and second homes. An asset allowance divides liquid assets by 36, 60 or 84 months, depending on DTI and loan size. An assets-only path needs liquidity equal to the loan plus closing costs, with no DTI test. Retirement accounts count at 70% (80% at age 59.5 and older). Business funds, gifts, cryptocurrency and unvested stock never count.
Rental-property purchases. If you are buying a rental, a DSCR loan is reviewed primarily on property-level rental income covering the payment, subject to lender guidelines. That path suits investors who want borrower income out of the picture. Bank statement income matters more when you are qualifying on personal income, such as on a primary-residence jumbo. Lendmire’s complete DSCR loans guide explains when each path fits.
Treatment as a non-QM file. Most bank statement loans are non-QM, but the loans still require that income be verified with individual records. The Federal Register’s final rule says verification records must be specific to the individual, which is why your own statements work as proof. The CFPB compliance guide adds that a lender need not verify extra income beyond what it relies on to show repayment ability. Neither document sets a bank statement formula. The expense ratio and deposit screens are program choices, which is why they differ across lenders.
Tax treatment can depend on how the funds are used and how the property is held; investors should keep clear records and speak with a qualified tax professional before relying on any deduction.
What Lowers Your Number
Most reductions are avoidable. Watch for these before you submit.
- Depositing personal funds into the business account, which inflates deposits that then have to be sourced or removed.
- Paying personal expenses from the business account, which muddies the ratio case.
- Moving money between accounts without a paper trail.
- Overdrafts and returned items, which signal weak cash management.
- Missing pages or non-consecutive months.
- Large unexplained deposits near the start of the window.
- Choosing business statements when personal statements, with owner transfers counted in full, would read stronger.
Documents to Gather
Pull twelve consecutive, complete statements for every account you plan to use, with all pages. If you use business statements, add proof of ownership and time in business. Have a CPA letter or P&L ready if you want a lower expense ratio considered. Prepare short written explanations for any large deposit, since sourcing is routine on jumbo files.
Above $3,500,000 on a primary residence, and above $3,000,000 on a second home or investment property, super-jumbo overlays apply. These include a 700 credit floor, a clean 0x30x24 housing history, 48-month seasoning after a credit event, and U.S. citizen or permanent resident status. Every figure here reflects select wholesale programs, subject to full underwriting.
Frequently Asked Questions
Do underwriters use gross or net deposits?
Underwriters start with gross deposits, then remove ineligible items and, for business accounts, apply an expense ratio. The result is closer to net than gross for business files and close to gross for personal files.
How are transfers between my accounts treated?
Transfers between your own accounts are removed, since they are not new income. A transfer from your business into your personal account is a separate case and counts at 100% on a personal-statement file.
Can a CPA letter change the result?
A CPA-provided ratio can replace the fixed 20%, 40% or 50% ratio where the program accepts it. The lender decides, so ask before you pick the statements. A lower ratio raises qualifying income on the same deposits.
Why is my qualifying income lower than my deposits?
Three things shrink the number: removed deposits, the expense ratio on business accounts, and the proration for partial ownership. Dividing by twelve then converts the annual total into a monthly figure. Each step is mechanical, so you can reproduce the result from your own statements.
Is twelve months or twenty-four months better?
Twelve months usually helps when income has risen recently, and twenty-four can help when one recent period was unusually strong or weak. Programs differ, so the stronger choice depends on how your deposits trended.
Next Steps
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, so the same deposits can be tested against more than one set of guidelines. Nothing here is a commitment to lend, and every file is underwritten individually.
About Lendmire
Lendmire — NMLS# 2371349 — is a DSCR and non-QM mortgage brokerage with investor loan programs in 41 markets, including Washington, D.C. DSCR eligibility is commonly reviewed by the lender around property-level rent rather than personal income documentation, subject to lender guidelines, and the brokerage helps arrange financing for LLC-owned portfolios beyond conventional financed-property limits. Recognized by Scotsman Guide as a Top Mortgage Workplace in 2025 and 2026.
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References
1. Scotsman Guide: Don’t Shut the Door on Quality Borrowers
2. Federal Register: Ability-to-Repay and Qualified Mortgage Standards final rule
3. CFPB ATR/QM 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: How to Use a CPA Letter for a Bank Statement Jumbo Loan · How Attorneys Qualify for a Jumbo Mortgage With Bank Statements · How to Prepare Bank Statements for a Jumbo Mortgage Application
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
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Legal disclosures. Lendmire (NMLS# 2371349) is a state-licensed mortgage brokerage that arranges financing through wholesale lender relationships. Lendmire is not a direct lender, depository institution, or registered financial advisor. The discussion above is general informational content about real estate financing — it is not financial, legal, or tax advice, and readers should consult licensed professionals for guidance on their individual circumstances. Loan inquiries are subject to lender underwriting; this article does not represent a commitment to lend. Loan terms, rates, and qualification standards vary by borrower, property, and state, and are subject to change at any time. Equal Housing Opportunity. NMLS Consumer Access: nmlsconsumeraccess.org.