How to Qualify on a 1099-Only Bank Statement Loan Using 12 or 24 Months

The Quick Read: A lender adds up the eligible deposits in your accounts, subtracts an expense factor where one applies, and divides by 12 or 24 to get monthly qualifying income. Which window you use depends on whether your income is rising, steady, seasonal, or falling. On most programs, 12 months is the standard starting point.

• Only real income counts. Transfers, loan proceeds, and unexplained large deposits usually come out.
• Business accounts typically carry an expense factor. Personal accounts are often treated more lightly, depending on the lender.
• A 12-month window helps when income has grown. A 24-month window helps when income is seasonal or lumpy.
• A declining trend can pull a lender toward the lower average, whichever window you submit.
• Owner-occupied homes and rentals follow different rules, and the difference changes which loan you want.

You earn on 1099s. Your tax return shows a fraction of what actually moved through your accounts, because write-offs shrink the bottom line. A bank statement loan exists for exactly this gap. It is reviewed on documented income under the applicable program, subject to lender guidelines. It is not a shortcut. It is a different way to prove the same thing.

How Is a 1099-Only Borrower’s Income Calculated?

The lender totals the eligible deposits over the lookback window, applies the expense treatment, and divides by the number of months. That monthly figure is your qualifying income. It then feeds the debt-to-income check, which compares your monthly debts to that income.

Here is the sequence most programs follow:

1. Pick the documentation path. Some programs read deposits. Others start from your 1099 forms and apply an expense factor. Many use statements to back up the forms.

2. Collect complete statements. Every page, every account you are using, your name on the account, and the institution visible.

3. Remove what is not income. Transfers between your own accounts, loan proceeds, refunds, and one-off windfalls come out. Docsumo’s explainer on bank statement income verification describes the same screen: transfers and loan proceeds are excluded, and large or unusual deposits must be sourced or they drop out.

4. Apply the expense treatment. A business account usually takes an expense factor. A personal account often gets counted with less haircut or none. The exact factor is lender-specific. Anyone who promises you a universal formula is guessing.

5. Average over the window. Divide by 12 or 24.

6. Underwriter review. The reviewer looks at where deposits came from, how regular they are, and whether the account looks clean. Expect requests for invoices, contracts, a profit-and-loss statement, or a letter from your accountant.

Lendmire is a mortgage broker. It arranges these loans through select wholesale lenders, and each lender sets its own expense factor and window rules. That is why the same borrower can see different qualifying income from two programs.

Key Terms Defined

Eligible deposit: money that lands in your account from your work and that the lender accepts as income. Transfers and loan proceeds do not count.

Expense factor: a percentage the lender subtracts from deposits to account for the cost of running your business. It reduces qualifying income.

Lookback window: the number of months of statements the lender averages. On most programs it is 12 or 24.

Non-QM: a mortgage that falls outside the standard Qualified Mortgage box, often because the borrower documents income in a non-traditional way. It does not mean bad credit.

Debt-to-income ratio (DTI): your monthly debts divided by your monthly qualifying income.

Commingling: mixing personal and business money in one account, which makes deposits harder to classify.

12 Months or 24 Months: What Actually Changes?

Twelve months reflects where your income is now. Twenty-four months reflects where it has been. The window you pick changes the average, and a lender reads the longer window as a steadier record.

On most programs Lendmire places files with, 12 months is the standard documentation. Longer windows tend to appear when income is seasonal or the lender wants more trend evidence. Some lenders let you choose. Others set the window by program, and the broker’s job is to match your pattern to the program.

Notice what 24 months is not. It is not automatically better. Many borrowers assume a longer record always helps. If your last year was your strongest, the longer window drags the average down.

Lendmire’s piece 12 vs 24 Bank Statement Months for a 1099 Earner goes deeper on the choice itself. Here, the focus is on how the numbers behave.

A Worked Example Using Index Numbers

Run the math on a 1099 contractor with two years of deposits. To avoid inventing dollar figures, express the monthly eligible deposits as an index. Say months 13 through 24 (the older year) average 90, and months 1 through 12 (the recent year) average 120.

• The 12-month average is 120.
• The 24-month average is 105, the midpoint of 90 and 120.

The 12-month window produces income about 14% higher. The expense factor then scales both figures the same way, so the gap carries through. For this borrower, growth makes 12 months the better window.

Now flip it. Say the older year averages 110 and the recent year averages 80. The 12-month figure is 80. The 24-month figure is 95. The longer window looks better on paper. Here’s the catch: an underwriter who sees the downward slope may use the lower recent figure anyway, or ask what changed. A falling trend is a question the file has to answer, not a number you can average away.

One more picture. Seasonal income, such as a landscaper whose deposits surge in summer, can look weak on a 12-month window that starts in a slow stretch. Twenty-four months shows two full cycles, and the average is more honest.

Which Window Should You Choose?

Run both averages before you apply, then match the result to your pattern. Here is the short decision path:

• Income grew over the last year or so: start with 12 months.
• Income swings by season: expect 24 months to fit better.
• One large client or project inflated a year: the longer window smooths it.
• Income dropped recently: plan for the lower figure and prepare an explanation.
• Income is steady: either works, so choose the program with the better terms.

Ask your broker to run both against actual programs. The best answer is often a program choice, not just a window choice. A window that raises income by a small margin may not outweigh a program with tighter leverage.

1099 Forms vs. Bank Deposits

A 1099 form reports what a payer sent you. A bank statement shows what reached your account. The two rarely match exactly, and the gap is where files get questions.

Common reasons for a mismatch:

• Multiple payers. Several clients each send a form, and the totals must reconcile with your deposits.
• Payment platforms. Payouts from a platform can arrive net of fees, or in lumps that do not line up with the form.
• Timing. A payment sent late in one year can land in the next.
• Forms not issued. Some clients pay you without sending a form at all.

A dedicated 1099 program starts from the forms and applies an expense factor. It tends to fit borrowers whose forms are clean, complete, and consistent with deposits. A bank statement program fits when your income is spread across payers, platforms, or an account that shows the full picture better than the forms do. Many 1099 files use both: forms for structure, statements for support.

If you converted from W-2 employment to 1099 work fairly recently, expect the lender to look for a track record. A shorter history can sometimes work when you stayed in the same field, but the rule varies by lender. Do not assume. Ask before you build the plan around it.

Deposit Rules That Can Shrink Your Number

Deposit hygiene decides more files than the window does. A clean 12 months can beat a messy 24.

• Transfers. Moving money between your own accounts is not income. If it shows up as a deposit, it gets stripped.
• Commingling. If personal and business money share one account, the underwriter must sort what is revenue. That is slower to document and easier to lose.
• Large deposits. A big one-off needs a source, such as a sale document or an invoice. Without one, it is excluded.
• Overdrafts and returned items. Repeated overdrafts or returned payments signal stress on the account and invite questions.
• Payment-app pass-throughs. If a payment app collects client money before moving it to your bank, the lender may want to see both sides.
• Account mixing. Across the wholesale network, some lenders will not let a personal-statement path and a business-statement path be combined on one loan. Others will. Ask before you split your income across account types.

If you use personal accounts only, as many 1099 contractors do, that can be fine. You simply document more in the personal account and keep the deposits easy to trace.

Where the General Rule Breaks

Every rule here has exceptions. These are the ones that come up most.

New or recent self-employment. Programs usually want a track record. A shorter history sometimes works if the work is in the same field as your prior job. The tolerance varies widely by lender.

Business ownership. If you run the income through an entity, business statements typically require a meaningful ownership stake, and the qualifying figure scales with your share. A minority owner often gets a smaller number than expected.

A co-borrower with traditional employment income. Some programs let a co-borrower’s documented income supplement yours. That can lift the file without changing your window.

Declining income. Covered above. Some programs lean to the shorter average when receipts fall.

Seasonal income. Usually pushed toward 24 months so the full cycle shows.

Mixed purpose. A rental is not automatically a business-purpose loan, and the label matters for the next section.

Leverage, Loan Size, and Reserves

These are typical ranges from select lenders in the wholesale network, and each file is underwritten individually. Leverage depends on what you are buying and how you will occupy it.

• Primary residence, purchase or rate-and-term refinance: up to 90% LTV on stronger files. LTV, or loan-to-value, is the loan as a percentage of the property’s value.
• Primary residence, asset-depletion alternative: up to about 80% LTV. This is reviewed against liquid assets instead of deposits.
• Owner-occupied cash-out (primary residence or second home): up to 80% LTV with a fixed expense ratio, and 75% with an accountant-prepared ratio, depending on loan size and credit.
• Investment property cash-out: tops out around 75% LTV.
• Investment property purchase on bank statement documentation: varies by lender. Investor-focused leverage guidance belongs on the DSCR side.
• Loan amounts: roughly $125,000 to $3,500,000.
• Reserves: commonly around 6 months of the housing payment.

Stronger credit, lower leverage, and more reserves generally support better terms. Term length follows each lender’s program sheet, so do not assume an extended or interest-only structure on a bank statement loan.

Does It Matter If the Property Is a Rental?

Yes, because occupancy decides which disclosure regime applies and often which loan fits. An owner-occupied purchase or refinance is a consumer mortgage, and TRID disclosure rules apply. A loan on a non-owner-occupied rental, including a short-term rental, is business-purpose and exempt from TRID.

The federal exemption covers credit extended primarily for a business or commercial purpose, as laid out in the CFPB’s Regulation Z exemptions page. The Federal Register notice for the ability-to-repay rule treats investment-purpose loans as business-purpose. Calling a property an investment does not settle it, though. Compliance Alliance cautions that the label alone does not make a loan exempt, and that owner-occupied rentals depend on unit count and loan purpose.

Here is the investor takeaway. If you are buying a rental you will not live in, personal-income documentation is usually the wrong tool. DSCR loans are designed for non-owner-occupied investment properties. Because they are business-purpose investor loans, they are reviewed differently from a standard owner-occupied mortgage, and they qualify primarily on property-level rental income covering the payment, subject to lender guidelines. Lendmire’s complete DSCR loans guide explains how that works. For a side-by-side view, see Lendmire’s page on DSCR loans versus bank statement loans for investors.

Programs below a 1.00 coverage ratio are available through select lenders in the network, but LTV and terms adjust. A bank statement loan makes the most sense when the property is your home, a second home, or a rental you plan to live in.

The Months Before You Apply

You cannot rewrite history, but you can clean up the months that will be read. Treat this as a rolling prep window, not a one-week scramble.

• Separate accounts. Route client payments to one account and keep personal spending in another, if you can.
• Stop moving money in circles. Every transfer between your own accounts becomes a line to explain.
• Document the big deposits. Keep invoices, contracts, or sale papers for anything unusual.
• Avoid overdrafts. Keep a buffer so the account looks stable.
• Gather the paper. Statements, 1099 forms, proof your business exists, an accountant letter if you have one, and ID.
• Reconcile forms and deposits. Know why your 1099 total differs from what landed in the bank.
• Time the application. If your last stretch was weak and the one before was strong, consider waiting so the stronger months carry more weight. A rising trend rewards patience (and a falling one punishes it).

Next Step

Lendmire’s consumer mortgage licensing covers 16 states. You can reach the team at 828-256-2183. Any loan is subject to lender guidelines, credit approval, and property review, and nothing here is a commitment to lend.

This article is general education, not legal or tax advice. Tax treatment can depend on how the funds are used and how the property is held, so keep clear records and speak with a qualified attorney or CPA about your own situation before relying on any deduction.

About Lendmire

Lendmire, NMLS# 2371349, is a mortgage brokerage focused on investor financing, arranging DSCR loans in 40 states plus Washington, D.C. — 41 markets total. Qualification is based on the property’s income rather than personal income documentation, subject to lender guidelines, making it a fit for LLC-held rentals and scaling portfolios. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.

References

1. Docsumo – Bank Statement Income Verification

2. CFPB – Regulation Z §1026.3, Exempt Transactions

3. Federal Register – Ability-to-Repay and Qualified Mortgage Standards Final Rule

4. Compliance Alliance – Regulation Z and Investment Properties