How a Sole Proprietor Turns Deposits Into Bank Statement Loan Income

The Quick Read: A sole proprietor’s deposits become qualifying income in four moves. The lender collects the statements, removes deposits that are not earnings, averages the rest over the window, and applies an expense factor. The result is a monthly figure that is reviewed on documented income under the applicable program, subject to lender guidelines.

• The lender sets the expense factor from your business type and paperwork. You do not pick it.
• Transfers between your own accounts, loan proceeds, refunds and one-time sales usually come out before anything is averaged.
• An accountant letter can support a lower factor, but underwriters test it against what the account actually shows.
• On a primary residence, select lenders in Lendmire’s wholesale network go up to 90% LTV on a purchase or rate-term refinance. LTV means loan-to-value, the loan as a share of the property’s value.
• For an investment purchase, a DSCR loan often replaces this whole calculation.

Why Tax Returns Understate a Sole Proprietor

traditional personal-income documentation understates what many sole proprietors earn. Depreciation, contractor costs, equipment and other write-offs shrink taxable profit even when cash moves through the account every week. HousingWire’s non-QM guide lists exactly these deductions as the reason bank statement loans exist.

Deposits show the cash flow instead. That is the whole premise of the program.

“Alternative documentation” does not mean thin documentation. HousingWire’s non-QM explainer describes these loans as fully documented. The paperwork is different, and it is still checked.

Across the wholesale network Lendmire works with, the standard file uses 12 months of business or personal statements. Market programs commonly run 12 to 24 months, per HousingWire’s bank statement explainer. Lendmire’s complete DSCR loans guide covers the rental-income side of non-QM lending, which comes up again below.

What Happens to Your Deposits, Step by Step

Underwriters follow a fixed sequence. The order matters because each step changes the next.

1. Collect complete statements. Every page and every consecutive month in the window. Missing pages stall files.

2. Total the deposits. The lender adds up everything that hit the account.

3. Scrub out non-income credits. Transfers, loan proceeds, credit-line draws, tax refunds and one-time asset sales come out.

4. Apply ownership share. A sole proprietor owns 100%, so this step does nothing. It matters for partners.

5. Apply the expense factor on business accounts. This is a percentage haircut for operating costs.

6. Average over the window. Strong and weak months get smoothed across all 12 months.

7. Run the result through debt-to-income, credit and reserves like any other file.

Written as a formula: eligible deposits, divided by the number of months, times one minus the expense factor, equals monthly qualifying income.

Which Deposits Get Removed Before Averaging?

Anything that is not earnings from your business comes out. Here is how the usual line items sort.

Large deposits do not automatically sink a file. They are often just excluded from the average, or you provide a short letter naming the source. Each lender sets its own trigger, and it is usually a percentage of average monthly deposits rather than a flat dollar amount. No single industry-wide trigger exists.

Gray areas come up constantly. Cash deposits, sales tax you collected, and customer deposits you later refunded all draw questions. Expect the underwriter to ask what each one is. A clean paper trail turns most of these from questions into counted income.

How Does the Expense Factor Work?

The expense factor is the underwriter’s estimate of what it costs to run the business. A higher factor means less of your deposits count. The lender sets it from your business type and documentation, and it is not a number you choose.

Service businesses with no employees generally get a lower factor. Product-based businesses and larger payrolls generally get a higher one. Some high-expense industries are underwritten above the lender’s default.

A modeled example shows the effect. These are illustrative assumptions, not program quotes. Say the scrub removes about one-tenth of total deposits.

• At an illustrative 50% factor, qualifying income lands at 45% of gross deposits.
• At an illustrative 30% factor, it lands at 63%.

That 18-point gap flows straight into loan size. This is why the factor is the biggest lever on the file.

An accountant-prepared letter can support a lower factor. A CPA, enrolled agent or other tax preparer can write it. Underwriters still compare it to real bank activity, so a letter claiming low costs next to statements full of vendor payments will not hold. Lendmire’s network treats the letter as support, not a guarantee.

On owner-occupied cash-out refinances (primary residence or second home), select lenders go up to 80% LTV with a fixed expense ratio, and 75% with an accountant-prepared ratio. The exact outcome varies by loan size and credit. Every figure here varies by lender and program — guidelines, property type, leverage, and credit profile all apply.

Business, Personal or Mixed Accounts?

The account you document changes the math. Here is the side-by-side.

Personal statements often count a larger share of deposits. Lenders may then want proof that business expenses were paid from a different account. Practitioners differ on the details, so treat any single rule with caution.

Owner draws. Money moved from your business account to your personal account is generally not re-proven as income if ownership is documented and the pattern is steady. Counting both the business deposits and the draws would double-count the same dollars. Label the statements so the underwriter sees which is which.

One commingled account. If everything runs through a single account, the underwriter must separate personal deposits from business revenue by hand. That means more scrub questions and more letters. Opening a business account now will not help a file that is months from submission, but it will clean up future months.

For more on how 1099 income gets treated, see Lendmire’s piece How a Bank Statement Lender Turns 1099 Deposits Into Qualifying Income.

A Messy Sole-Proprietor Year, Worked Through

Run the numbers on a freelance contractor with 12 months of business statements. Everything below is a modeled assumption.

• Raw deposits. The contractor’s total credits are the starting point, call it 100%.
• Scrub. A transfer from savings, a business line-of-credit draw and one equipment sale together account for about 10% of the total. Eligible deposits are 90%.
• Average. Divide by 12 months. A slow winter and a strong summer even out.
• Expense factor. At an illustrative 50%, monthly qualifying income is 45% of gross deposits divided by 12.
• Result. That figure goes into debt-to-income alongside the new housing obligation and other debts.

Now compare the tax return. Schedule C profit may sit far below that number because of depreciation and write-offs. Underwriters expect some gap. A sharp divergence invites questions about whether the deposits are really revenue, which is why the scrub and the paper trail carry so much weight.

Seasonality and Trend

Averaging helps seasonal businesses. A landscaper with thin winters and heavy summers gets one blended figure across the window.

Trend matters just as much. Flat or rising deposits read well. Falling deposits trigger declining-income rules, and the underwriter may lean on the lower recent months. Bounced items and overdrafts count against the file too.

From Qualifying Income to What You Can Borrow

Qualifying income is the input. The rest of the chain looks like any other mortgage. The lender sets the new housing obligation against that income, adds your other debts, and checks credit and reserves.

For context, Bankrate reports that market non-QM debt-to-income limits can run up to 50%, against 43% for qualified mortgages. Those are market-survey figures. Lendmire’s network underwrites each file individually.

The network parameters that typically apply to this program look like this:

• Primary residence: up to 90% LTV on a purchase or rate-term refinance, with the top of the range going to stronger files.
• Asset-depletion alternative: qualifying from liquid assets runs to about 80% LTV on a primary residence.
• Owner-occupied cash-out: up to 80% LTV, as covered above.
• Investment cash-out: tops out around 75% LTV.
• Loan sizes: roughly $125,000 to $3,500,000.
• Reserves: commonly around 6 months of the housing payment.
• Investment purchase: leverage on bank statement documentation varies by lender.

Loan terms follow each lender’s program sheet. Do not assume extended or interest-only structures carry over from the DSCR side.

Those are typical ranges from select lenders, subject to lender guidelines, not commitments to lend. For a closer look at cash-out limits, read Lendmire’s piece How Much a Sole Proprietor Can Pull in a Bank Statement Cash-Out.

Where Bank Statement Loans Stop and DSCR Starts

Occupancy decides which product fits. Owner-occupied files, meaning a primary residence or second home, are consumer mortgages. A Regulation Z provision requires lenders on those loans to verify any income they rely on with reliable third-party records. Bank statements are that record for a self-employed borrower.

A rental purchase is different. Credit for a non-owner-occupied rental, including a short-term rental, is business-purpose, and the Reg Z exemption text excludes business-purpose credit from the consumer rules. This is general context, not legal advice.

The practical result is simple. For most rental purchases, a DSCR loan is reviewed primarily on property-level rental income covering the payment, subject to lender guidelines, and your personal deposits never enter the calculation. Bank statement loans matter more when you are buying a home to live in, pulling cash from a primary residence or second home, or when you want a debt-to-income-based file. Lendmire’s network does offer both paths, so the decision comes down to the property and your goals.

Tax treatment varies; consult a qualified professional.

What to Fix Before You Apply

Clean statements win files. Use this checklist for the months before you apply.

• Keep personal spending out of the business account.
• Document every transfer between your own accounts.
• Write down the source of any large deposit as it happens.
• Talk to your accountant about a letter if your costs are genuinely low.
• Do not take on new debt or open new credit lines mid-file.
• Pull complete statements, every page, for the full window.

An underwriter may ask for a letter of explanation on a deposit, an overdraft or a gap. Keep it short, factual and tied to a document.

Key Terms Defined

Bank statement loan: A mortgage that qualifies a self-employed borrower using deposits in business or personal bank statements instead of tax-return income.

Eligible deposits: The deposits left after the lender removes transfers, loan proceeds, refunds and one-time items.

Expense factor: The percentage of eligible deposits the lender treats as business costs, which reduces qualifying income.

Qualifying income: The monthly income figure the lender uses after averaging deposits and applying the expense factor.

DTI (debt-to-income): Your monthly debts, including the new housing obligation, as a share of qualifying income.

Non-QM: A mortgage outside the standard qualified-mortgage box. HousingWire reports bank statement loans make up about 34% of non-QM volume, citing Optimal Blue.

If you are self-employed and want to see how the numbers work, Lendmire can help you compare bank statement loan options based on your deposits, the property, credit profile, leverage, and your goals.

About Lendmire

Lendmire (NMLS# 2371349), a non-QM mortgage broker serving investors in 41 markets including Washington, D.C., helps structure DSCR scenarios commonly evaluated around a property’s rental income rather than personal income paperwork, subject to lender guidelines. A Scotsman Guide Top Mortgage Workplace in 2025 and 2026, Lendmire places loans through wholesale investor lenders and is not a direct lender.

References

1. HousingWire, Non-QM Loans Guide

2. HousingWire, What Are Non-QM Loans and Who Are They For

3. HousingWire, How Bank Statement Loans Work

4. Bankrate, Non-QM Loans

5. CFPB, Regulation Z § 1026.43

6. eCFR, 12 CFR 1026.3