How to Use a Higher Income Year on a Bank Statement Purchase or Refinance

The Quick Read: If your most recent twelve months of deposits beat the year before, ask for a 12-month statement window, because it drops the weaker older months from the average and raises your monthly qualifying income, provided the program allows it and the lender accepts the deposit pattern. Run the 12-month and 24-month math side by side before you apply. The right window follows your income trend, not a preference.

• A bank statement loan is reviewed around documented income under the applicable program, subject to lender guidelines. It does not qualify the property’s rent.
• A rising trend favors the shorter window. Flat, seasonal, or declining income often favors the longer one.
• The same deposit math drives a purchase and a refinance. What changes is leverage, not the income calculation.
• Clean statements matter as much as strong ones. Transfers, loan proceeds, and one-time deposits get stripped out.
• Higher income only helps until leverage, reserves, or loan size becomes the limit.

Key Terms Defined

Bank statement loan: A mortgage that is reviewed around average deposits in your business or personal accounts instead of on tax-return income.

Lookback window: The run of consecutive monthly statements the lender averages, commonly 12 months, with some programs offering 24.

Expense factor: The share of business deposits the lender treats as operating costs, so only the remainder counts as your income.

DTI (debt-to-income ratio): Your monthly debts, including the new housing payment, divided by your monthly qualifying income.

Eligible deposits: Deposits that trace to your business or professional work, after transfers, loan proceeds, gifts, and refunds are removed.

Business-purpose loan: A loan for a non-owner-occupied rental, reviewed differently from a mortgage on a home you live in.

What Does a Higher Income Year Actually Change?

A higher income year changes one thing: the monthly number the lender divides your debts into. Deposits are averaged over the window, so a stronger recent year pulls the average up when the older, weaker months fall out of the window.

That sounds small. It is not. Qualifying income sets how large a payment your DTI can carry, and that sets how much house or loan you can pursue.

Many self-employed borrowers find that traditional personal-income documentation understates what they earn, because write-offs shrink the bottom line. Bank statement programs exist for that gap. Accredited Real Estate Schools notes in its explainer on non-QM, bank statement, and asset-based loans that lenders analyze deposits over a set period, often 12 or 24 months, and apply an expense factor when business statements are used.

One split matters before anything else. A DSCR loan is reviewed primarily on property-level rental income covering the payment, subject to lender guidelines, so your personal income never enters the picture. A bank statement loan runs on your deposits. The higher-income-year question only exists on the bank statement side.

How Underwriting Treats Your Deposits, Step by Step

Across the wholesale network Lendmire works with, underwriters follow the same basic sequence on a bank statement file. Lenders differ on the details, so treat this as the common shape and not a universal formula.

1. Account type. Business statements take an expense factor. Personal statements usually count eligible deposits more directly, but those deposits must trace to your work.

2. Window. The file uses a consecutive run of statements, typically 12 months. Whether you can choose between 12 and 24 is a program rule, not a borrower right.

3. Deposit scrub. The underwriter removes transfers between your own accounts, loan proceeds, gifts, refunds, and large unexplained deposits.

4. Expense factor. On business accounts, the lender applies a factor from its program grid. A fixed ratio is the default. Some programs accept an accountant-prepared ratio when it is documented.

5. Average. Eligible deposits, less the expense factor, are divided by the number of months in the window.

6. Rest of the file. Credit, reserves (commonly around 6 months of the housing payment), DTI, and property rules all still apply.

Notice what is missing: any promise that all deposits count. They do not. Statements with transfers tangled into revenue produce a lower number than the same business with clean accounts.

Why the Window You Choose Changes Your Number

The window sets which months get averaged. A shorter window rewards a recent surge, and a longer window smooths it out.

Here is the arithmetic, using multiples so nothing is mistaken for a real deposit figure. Say your older 12 months average X per month in eligible deposits and your recent 12 months average 1.5X. The 24-month average is 1.25X. The 12-month average is 1.5X. That is a 20% gap in qualifying income before any expense factor.

The expense factor scales both windows the same way, so it does not erase the gap. It does change the final dollars, which is why a good loan officer runs both windows and both expense approaches before choosing.

Now flip it. If your income was flat, both windows land on X, and the window choice does not matter. If your older year was stronger, with an older average of 1.5X and a recent average of X, the 24-month window gives 1.25X against a 12-month figure of X. In that case the longer window gives you 25% more qualifying income.

The rule is simple enough to state in one line. Pick whichever window produces the higher number that the underwriter will believe.

Purchase vs. Refinance: Same Income Math, Different Limits

The income calculation does not care whether the loan is a purchase or a refinance. On a refinance, the lookback anchors to the most recent statements at application. A rate-and-term refinance and a cash-out refinance both use the same deposit average.

What differs is leverage.

For owner-occupied cash-out on a primary residence or second home, the ceiling is up to 80% LTV with a fixed expense ratio, or 75% with an accountant-prepared ratio. Those are subject to loan size and credit. A purchase or rate-and-term file on a primary residence can reach up to 90% LTV, and stronger files earn the top of that range. An asset-depletion alternative, which is reviewed against liquid assets, runs to about 80% LTV on a primary residence.

A higher income year does not raise those caps. It helps you clear DTI at the leverage you already have.

Prove the Higher Year Is Real

Underwriters do not average what they cannot trace. The CFPB’s ability-to-repay and qualified mortgage compliance guide says a creditor must consider and verify the income or assets it relies on. It also says extra income beyond what is needed to repay does not have to be verified. In practice, that means a lender builds the file on the documented window that supports repayment. It does not chase every dollar you earned.

So your job is to make the strong year easy to rely on. A checklist helps:

• Separate transfers. Show clearly which deposits are moves between your own accounts.
• Explain large deposits. A single big deposit needs an invoice, a contract, or a written explanation.
• Document the cause of growth. New clients, repriced contracts, or added staff read as durable. A one-off sale does not.
• Keep one clean revenue path. Running income through both business and personal accounts invites double counting and questions.
• Watch the overdraft count. Repeated negative-balance days undercut an otherwise strong year.
• Consider a preparer letter. An accountant-prepared expense ratio, where the program accepts it, can support a different expense treatment than the default.

Lendmire’s separate piece How to Use This Year’s Higher Income on a Bank Statement Mortgage goes deeper on the documentation side.

Spikes, Dips, and Trend Flags

A 12-month average gives one huge month more weight than a 24-month average does. Underwriters know this. How the file reads depends on the shape of the deposits.

If the spike came from a sale, a liquidity event, or a one-time payout, expect it to be pulled out or heavily questioned. Lendmire’s article How to Use RSU and Vesting Income on a Super Jumbo Bank Statement Loan covers a related case where lumpy income needs careful treatment.

If your income peaked and has since fallen, a short window may hurt you, because the recent months are the weakest ones. A falling pattern is a flag on its own. In that situation, the more honest question is whether the property can carry itself. For a rental, a DSCR loan may be the cleaner route, since it looks at rent and not your deposits.

Newer businesses run into a separate wall. A business under 24 months old cannot use a 24-month window at all, which is a program-eligibility question, not a strategy choice.

Pass-through money is another trap. Deposits for client-paid travel, materials, or reimbursed ads inflate gross deposits. Carve them out before you submit, or the underwriter will do it for you, and an underwriter-made cut looks worse than a clean file.

When to Apply

Timing is a real lever. The window rolls forward each month, so the best moment is when the recent run looks strongest and still includes no ugly months.

If you are just past a strong stretch, applying sooner keeps those months in the average. If the older months are the weak ones and they are about to roll off, waiting one more month can help in a rising-income case. If your strong months are about to be diluted by a slow season, apply before that happens.

Traditional personal-income documentation creates a related wrinkle. A filed return that shows less than your deposits does not necessarily sink the file, because these programs review your file on documented income under the applicable program, subject to lender guidelines. Expect questions, though, and be ready to explain the gap between write-offs and deposits. Tax treatment varies, so consult a qualified professional.

Run Your Own Numbers First

Before you talk to anyone, do this on your own statements:

1. List each of the last 24 months of deposits by account. 2. Strike out transfers between your accounts, loan proceeds, gifts, and refunds. 3. Add up the remaining deposits for the most recent 12 months and for all 24 months. 4. Divide each total by its number of months. 5. Apply the expense factor your program uses to each result, if business statements are involved. 6. Compare the two results, then ask what else limits you: leverage, reserves, or loan size.

That last step is the one most self-run checks skip. A higher monthly figure does nothing if the loan amount or reserves, not DTI, is what stops the file.

Where Income Stops Being the Constraint

Higher qualifying income raises DTI headroom, which raises the payment you can carry, which raises the loan you can pursue. That chain has a ceiling.

Loan sizes in this lane run from roughly $125,000 to $3,500,000. Reserves are commonly around 6 months of the housing payment, and large files may need more. Leverage caps do not move with income either. A borrower with a record year still faces up to 90% LTV on a primary-residence purchase and around 75% LTV on an investment-property cash-out.

A common pattern for self-employed investors is to use bank statements for their own home and DSCR for rentals. Each new property you finance on a bank statement loan adds to your personal DTI. A DSCR loan evaluates each rental on its own rent, so rising income only stretches so far for a portfolio investor.

Occupancy also decides the paperwork. 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. That includes the disclosure rules, since owner-occupied bank statement loans are consumer mortgages under TRID, and business-purpose rentals are exempt.

For investment purchases on bank statement documentation, leverage varies by lender. Anything you read quoting one number for the whole market describes one lender’s sheet, not yours. Details of the DSCR path are in Lendmire’s complete DSCR loans guide.

A Straight Decision Rule

Run both windows. Then follow the trend.

• Income rising: request the 12-month window, document why it rose, and expect the underwriter to test the pattern.
• Income flat: the window barely matters, so choose the one with fewer problem months.
• Older year stronger or income seasonal: lean toward 24 months where the program offers it.
• Income falling: compare a DSCR loan if the property is a rental, since the property’s rent carries the file.

No decision tree replaces the program sheet. Whether a borrower can select the window, and whether the lender reviews recent months regardless, is each program’s call. That is why the same file can be a clean fit at one lender and a stretch at another, and why seeing several programs side by side matters.

Lendmire’s consumer mortgage licensing covers 16 states, and every file is underwritten individually by the lender, so this is not a commitment to lend.

About Lendmire

Lendmire — NMLS# 2371349 — is a mortgage brokerage specializing in DSCR investor loans, helping arrange financing across 41 markets, including Washington, D.C., through wholesale and investor-lending channels. The model centers on property-level rental income reviewed by the lender rather than W-2 documentation, subject to lender guidelines, suiting entity-owned and multi-property investors. Lendmire holds Scotsman Guide Top Mortgage Workplace recognition for 2025 and 2026.

References

1. accreditedschools.com: Non QM Loans Explained Bank Statement DSCR and Asset Based Loans

2. CFPB Ability-to-Repay/Qualified Mortgage Small Entity Compliance Guide