How to Qualify When a Slow Year Follows a Strong One on Bank Statements

The Quick Read: A slow year after a strong one does not end a bank statement application, but the lookback window you submit, the shape of the decline, and the written explanation behind it decide what qualifying income the underwriter can actually use. Bank statement files are reviewed by hand, so the story behind the numbers matters as much as the totals.

• A bank statement loan is reviewed on documented income under the applicable program, subject to lender guidelines. The lender builds that income from your deposits, not from your tax return.
• A longer window can lift the average when the older year was stronger. Underwriters also read the direction of the deposits, so a lift on paper does not erase a visible slide.
• Owner-occupied files can reach up to 90% LTV on a primary-residence purchase or rate-term refinance, and up to 80% on an owner-occupied cash-out, through select lenders.
• On a rental purchase, a DSCR loan skips the personal-income question. It qualifies primarily on property-level rental income covering the payment, subject to lender guidelines.

Two Loans, Two Different Questions

Your slow year only matters on one of these two products. A bank statement loan underwrites you, so your deposit history is the file. A DSCR loan reviews the property’s rental income, so your own income dip never enters the calculation.

DSCR stands for debt service coverage ratio. It compares a rental’s monthly rent to the monthly cost of owning it. The complete DSCR loans guide covers that math in full.

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.

Many self-employed investors end up using both. They may buy rentals on DSCR and use bank statement documentation when they want a primary residence, a second home, or a cash-out on a home they live in. This article focuses on the bank statement side, because that is where a slow year after a strong one actually creates a problem.

Key Terms Defined

Bank statement loan: a mortgage that qualifies a self-employed borrower on documented deposits instead of tax-return net income. It is fully underwritten, not a shortcut.

Lookback window: the number of consecutive months of statements the lender averages. Twelve months is the base documentation on the programs described here. Some lenders also offer a longer window, depending on their program sheet.

Eligible deposits: deposits that count as income. Transfers between your own accounts and loan proceeds do not count.

Expense factor: the share of business-account deposits the lender treats as operating costs. The lender sets it, and you do not choose it.

Slope: the direction your deposits are moving inside the window. Underwriters read slope alongside the average.

LTV: loan-to-value, the loan amount as a percentage of the property’s value.

How Does an Underwriter Read a Strong Year Followed by a Slow One?

The underwriter builds a monthly income number from your deposits, then checks whether the direction of those deposits supports it. Every non-QM file goes through a person reviewing statements, and Scotsman Guide describes that process as highly manual. That is good news for you. A person can read context that a formula cannot.

The usual sequence looks like this:

1. Pick the window. The window decides which months get averaged. With an older strong year, a longer window includes it and raises the figure. A 12-month window counts only the slow year.

2. Total the eligible deposits. The underwriter strips out transfers between your own accounts and non-income credits. One-time large deposits are typically sourced and often excluded.

3. Apply the expense factor. On business accounts, the lender removes a share of deposits as expenses. Personal-account programs may count deposits closer to full value, depending on the program.

4. Divide by the months and apply your ownership share. That gives monthly qualifying income.

5. Run the trend check. Underwriters commonly ask for a letter of explanation when deposits fall. Some will then rely on only the most recent 12 months, even when a longer window was submitted.

6. Feed the result into the full file. The income number goes into debt-to-income alongside credit, assets, reserves, and the appraisal, like any fully underwritten loan.

Step five is where strong-then-slow files get decided. A lender that sees a drop with a clear cause and a stable recent run reads it very differently from one that sees a drop still in motion.

Worked Example: The Same Deposits, Three Outcomes

Run the numbers on an index instead of dollars. Set your average monthly eligible deposits in the strong year at 100. Everything else is measured against that. These are modeled assumptions, not market data.

All three slow years average 70, so the 12-month and 24-month figures are identical across the rows. The 24-month average of 85 is the strong year (100) averaged with the slow year (70). The averages are identical, but the files are not.

The stabilized file is easy to explain. The slow year is flat, so a longer window is a reasonable request. The sliding file is the risky one. The last quarter sits at 55, well below either average, and an underwriter may decide the recent months are the truest picture and use those.

The rebounding file is strong in a different way. The average is the same, but the recent months show recovery. Evidence of that recovery, such as current deposits and a recent profit-and-loss statement, can carry real weight in the explanation.

The expense factor works the same way on both windows. If your accounts are business accounts, the factor trims both numbers proportionally. It does not close the gap between the windows, and it does not hide a slide.

12 Months or 24 Months?

Choose the window that matches the shape of your income, not the window that produces the biggest number. The decision depends on what the older months say about you.

Two points keep this table honest. First, a longer window is not available on every program, and the choice is not always yours. The program sheet of the individual lender controls it. Second, lenders differ on a strong prior year after a decline. Some will average it in when the recent months have stabilized. Others will lean on the recent period whenever the slope points down.

Because the network includes many lenders, the practical move is to ask for the calculation both ways before you commit. Seeing the 12-month and 24-month numbers side by side tells you which lender’s policy fits your file.

Slow Year, Seasonal Year, or Declining Income?

Underwriters care less about how low the number is than about whether the pattern makes sense. A pattern with a clear cause reads as safe. A pattern with no cause reads as risk.

• A slow year with a cause: a lost client, a one-time gap, a project that ended. If you can name the cause and show it is over, the file reads as a reset.
• A seasonal business: the low months repeat every cycle. A 12-month window shows one full cycle, but a slow stretch at the start or end can distort it. A longer window can show the true rhythm.
• A structural decline: deposits fall because the business is shrinking. This is the hardest file, and a lender may decline to rely on the older average at all.

The question the underwriter is asking is simple: will this income continue? Your job is to answer it with evidence.

Build the Explanation

A good letter of explanation is short, specific, and backed by documents. Four parts cover it:

1. Cause. State plainly what happened. Name the client, contract, or event that changed.

2. Duration. Say when the dip began and whether it has ended.

3. Evidence of recovery. Point to recent deposits, new contracts, a rebuilt pipeline, or a current profit-and-loss statement.

4. Supporting documents. Attach the invoices, contracts, or records that back each claim.

Keep it factual. The underwriter is checking whether your story matches your statements, so a vague letter does more harm than no letter. A current profit-and-loss statement or a letter from your accountant can also help, and some lenders will use an accountant-supported expense ratio in place of a flat factor, at their discretion.

For a closer look at how lenders handle a single weak deposit year, see Lendmire’s piece How to Qualify for a Bank Statement Loan When One Year of Deposits Declined. If your business runs a formal profit-and-loss program instead, Lendmire also covers how to qualify on a p&l loan when revenue declined one year.

Deposits That Help or Hurt

Clean statements raise your qualifying income, and messy ones can lower it. Three habits make the biggest difference.

Keep business and personal money separate. Mixed accounts blur what is income and what is a transfer, and that can distort the picture in either direction.

Document large one-time deposits. A big lump from a sale, a gift, or a loan will be questioned. If it is real business income, show the invoice or contract. If it is not income, expect it to be excluded.

Disclose every account. Scotsman Guide notes that bank statement loans take extra diligence and that multiple accounts need to be reviewed. Leaving one out can under-qualify you, because income deposited there never gets counted.

Where the Rule Breaks

The general guidance above has four named exceptions.

Income that has ended. If the strong year came from a business you sold or wound down, the underwriter may not rely on the older average at all. The old deposits no longer describe your current earning power.

A business with a short history. Without a full two years, lenders lean on the other parts of the file, such as liquid assets and credit strength. Expect more questions about reserves.

Commingled accounts. When personal and business money mix, the underwriter must untangle it. That can push your number either way, and it slows the review.

A seasonal slow year. If your slow year is just one low season inside a 12-month window, a longer window may show the true cycle. Without that context, the short window can look like a decline.

Which Rules Apply Depends on Occupancy

The loan’s purpose decides the paperwork around it. An owner-occupied file, meaning a primary residence or second home, is a consumer mortgage, and consumer disclosure rules apply to it. A bank statement loan on a non-owner-occupied rental, including a short-term rental, is business-purpose and exempt from those disclosure rules.

The federal ability-to-repay standard applies to the owner-occupied, consumer side of the divide, not to business-purpose rental loans. The CFPB’s ability-to-repay provision requires a lender to make a reasonable, good-faith determination that you can repay. It does not give a formula for averaging a strong year against a slow one. Each lender sets its own policy, and the file must still support a reasonable conclusion.

That is why two lenders can read the same statements differently. It is also why shopping the file matters.

Leverage and Loan Size on These Files

These figures are typical ranges from select lenders in Lendmire’s wholesale network, subject to lender guidelines, credit approval, and property review.

• Primary residence purchase or rate-term refinance: up to 90% LTV through select lenders. Stronger files earn the top of the range.
• Owner-occupied cash-out (primary residence or second home): up to 80% LTV with a fixed expense ratio, or 75% with an accountant-prepared ratio, depending on loan size and credit.
• Investment-property cash-out: up to 75% LTV.
• Investment-property purchase on bank statement documentation: leverage varies by lender. Investor-focused leverage guidance belongs to the DSCR side.
• Asset-depletion alternative on a primary residence: up to 80% LTV.
• Loan amounts: roughly $125,000 to $3,500,000, with reserves commonly around six months of the housing payment.

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.

Apply Now or Wait?

Apply now when your recent months have stopped falling. A stabilized or rebounding file reads well, and waiting only adds months of weak history to the window. Apply now if you can show the cause of the dip is over.

Wait when the slide is still going. If deposits are still dropping, another few months can make the recent period weaker, not stronger. Rebuilding a few stable months before you submit can change the underwriter’s read.

Also wait if you are one or two statements away from a cleaner window. Dropping an old distorted month, or adding a recovery month, can shift the average. Ask the lender how the window would look at each point.

If the Number Comes In Low

A low number is not the end of the road. You have several options, each with tradeoffs.

• Asset depletion. If you hold substantial liquid assets, qualifying from them can run up to 80% LTV on a primary residence. It suits borrowers with more savings than steady income.
• A different window or program. Another lender in the network may use a longer window or a different expense approach. Same statements, different result.
• A rental purchase on DSCR. If the goal is an investment property, a DSCR loan is reviewed primarily on property-level rental income covering the payment, subject to lender guidelines. Your personal income dip does not enter the file. Programs below 1.00 coverage are available through select lenders in the network, though LTV and terms adjust.
• Waiting and rebuilding. If the slide is recent, a few stable months can improve the file more than any restructuring.

Scotsman Guide draws the same line between the two borrowers. Bank statement borrowers are often self-employed and show low taxable income through tax planning, while non-QM investor loans focus on property cash flow.

Pre-Application Self-Check

Run this list before you talk to a lender:

1. Gather every business and personal statement for the full window you might use, across all accounts. 2. Mark transfers, loan proceeds, and one-time lumps, and be ready to source each one. 3. Calculate your average eligible deposits two ways: all 24 months, then the most recent 12. 4. Plot the months by quarter. Note whether the recent quarters are falling, flat, or rising. 5. Write the explanation using the four parts above. 6. Pull a current profit-and-loss statement and any accountant letter. 7. Confirm your reserves, since six months of the housing payment is a common target.

Next Steps

Lendmire is a mortgage broker that arranges financing through select lenders in its wholesale network, and owner-occupied bank statement programs are offered in 16 states. Qualification is subject to lender guidelines and is not a commitment to lend.

A slow year is a chapter in your file, and lenders are mostly asking whether it is over.

About Lendmire

Lendmire (NMLS# 2371349) is a DSCR-focused mortgage broker that helps arrange investor financing across 41 markets, including Washington, D.C., through wholesale and investor-lending channels. DSCR eligibility is generally reviewed by the lender around the property’s rental income rather than personal income documentation, subject to lender guidelines — which works for self-employed investors, LLC operators, and portfolios above four financed properties. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.

References

1. Scotsman Guide: It’s Not the Fittest Who Survive, It’s the Fastest

2. Scotsman Guide: Don’t Shut the Door on Quality Borrowers

3. CFPB Regulation Z, ability-to-repay provision

4. Scotsman Guide: Remove the Shroud of Mystery on These Loans