How to Document Declining Deposits for a Bank Statement Loan on a Rental

The Quick Read: Name the cause of the decline, show that it has ended or stabilized, and back both with paper an underwriter can verify. A short letter alone rarely does it. The letter works only when statements, a profit-and-loss report, and source documents say the same thing.

• Underwriters read the direction of your deposits, not just the average.
• Non-income credits come out first, so a declining file often looks weaker after the scrub than it did gross.
• Seasonal, uneven, and falling deposits each need different proof.
• A decline usually shrinks qualifying income and the loan amount before it ends a file.
• Whether the property is a true rental or a home you will live in changes which loan options exist.

A bank statement loan turns your deposit history into qualifying income. So when deposits slide, the paperwork has a bigger job than usual. This guide walks through how the file gets read, what evidence fits each type of dip, and when documentation cannot fix the problem. Program figures here reflect select lenders in Lendmire’s wholesale network and are not a commitment to lend. Every file is underwritten individually.

Key Terms Defined

Bank statement loan: A mortgage that is reviewed around documented income under the applicable program, using 12 months of personal or business bank statements instead of tax-return income.

Deposit scrub: The lender’s first pass, which removes anything that is not real income, such as transfers between your own accounts, refunds, and loan proceeds.

Expense factor: A percentage the lender subtracts from business-account deposits to estimate what you actually keep after costs. Each lender sets its own.

Slope: The direction of your deposits over time. Two files can share the same average while one is climbing and the other is falling.

Letter of explanation: A short written statement that names the cause of an unusual pattern and points to the documents that prove it.

Commingling: Mixing rent, personal spending, and business flows in one account, which can make income look lower than it is.

How Do Underwriters Read Declining Deposits?

They scrub the deposits, average what is left, apply an expense factor to business accounts, and then check the direction. That last step is where a decline shows up. The average alone can hide it.

Here is the usual order, based on how most programs we place files with work. The HousingWire guide to bank statement loans describes the same general flow.

1. Statement pull. The lender collects consecutive, complete months from personal or business accounts. Your program set the window, and the network standard is 12 months.

2. Deposit scrub. Transfers, refunds, loan proceeds, and one-time windfalls come out. Many borrowers are surprised here. A file that looks fine gross can look thin net.

3. Average and expense factor. Eligible deposits are divided by the number of months. Business deposits are then discounted by the lender’s expense factor. Personal deposits are often counted at or near full value.

4. Slope read. The underwriter asks whether recent months are running below the average. If they are, the file is a decline, not a steady earner.

5. Response. Lenders typically respond in one of four ways. They ask for a written explanation, use a more conservative average, request added documentation, or find the file ineligible under that program.

Recent months may be weighted more heavily on some programs. Lender policy varies, so treat that as a possibility rather than a rule.

Why 12 months versus 24 months matters

A 12-month window that catches only your strongest season can overstate income. A longer window shows the full cycle, which is why it helps a seasonal file. But the reverse can happen with a true decline. A longer window drags in older, higher months and pulls the average up, while the most recent months sit well below it. That gap is what the underwriter will notice.

For a falling file, a shorter window may read better where the program allows it. Bankrate notes that some programs accept statements going back as far as two years. Whether you get a choice depends on the lender, so ask before you assume.

Which Pattern Do You Actually Have?

Classify your dip before you write a word. Seasonal, uneven, and falling deposits look different to an underwriter, and each needs different proof.

Seasonal is not declining. Seasonal income dips on a predictable schedule and rebounds. If last year’s statements show the same dip, they are your best exhibit. A falling file is different. The numbers drop compared with the same period a year earlier and do not bounce back on their own.

Be honest with yourself here. Calling a true decline seasonal is the fastest way to lose an underwriter’s trust. They compare year-over-year months, and the comparison will show it.

How Do You Build the Evidence Package?

Gather it before you submit, not after the underwriter asks. A complete package answers the question before it is raised.

1. Complete statements for every month in the window, every page, with no gaps.

2. A year-to-date comparison against the same months last year, so the trend is visible and explained.

3. A profit-and-loss statement, ideally prepared by a CPA, covering the same period as the statements.

4. Source paperwork for any unusual deposit: contracts, invoices, closing statements, or a bill of sale.

5. Lease and rent roll reconciliation, if rent flows through the account, showing that deposits match what tenants owe.

6. Evidence of recovery: recent months stabilizing, signed contracts, a backlog of work, or a new tenant in place.

Rank your evidence by how hard it is to dispute. Recent bank statements and third-party documents sit at the top. A CPA-prepared profit-and-loss report comes next. Contracts and invoices follow. Your own written narrative sits at the bottom, because it is only as strong as the paper behind it.

This lines up with what the ability-to-repay rule asks of lenders on consumer loans. Under CFPB Regulation Z, a lender must verify the income or assets it relies on using third-party records that are reasonably reliable. Bank statements are one acceptable type, and the lender picks how to compute income from them. The rule prescribes no method, so how a decline is treated comes from each lender’s own guidelines, not from federal law.

What Rental-Specific Evidence Helps?

On a rental, declines usually trace to the property or how its money moves. Match the proof to the cause.

Commingled accounts deserve special attention. When rent, personal spending, and business flows share one account, income can look lower than it is. This is fixable before you apply. Separating the accounts and letting a few clean months build up often helps more than any letter.

Overdrafts do not automatically disqualify a file. Pattern, recency, and cause decide how they are read. One overdraft during a repair-heavy quarter reads very differently than a string of them in the latest three months.

How Do You Write the Explanation Letter?

Keep it short, factual, and tied to documents. One page is plenty. The letter should read like a note to someone checking your math, not a plea.

Field by field, cover:

• What: the decline, in plain words, with the months it covers.
• When: the dates and amounts of any unusual deposit.
• Why: the specific cause, such as a vacancy, a lost client, or a repair.
• Proof: the document that supports each statement.
• Recovery: what has changed since, with evidence.
• Attachments: a list of what you included.

Weak: “Business has been slow lately and things are tough, but it should pick up soon.”.

Strong: “Deposits fell in the months after a tenant vacated the second unit. A new lease began the following month, attached with the rent roll. Recent statements show deposits returning to the earlier level.”.

The strong version names the cause, points to proof, and shows the situation has changed. The weak version asks the underwriter to take your word for it.

A copy-ready shape: “Between [start month] and [end month], deposits were lower because of [cause]. [Document] attached supports this. Since [date], [evidence of recovery]. Attached: [list of documents].”

What Mistakes Sink an Explanation?

• Padding the letter with emotion instead of facts.
• Contradicting another document in the file, such as a lease that disagrees with your story.
• Moving money between accounts right before you apply.
• Leaving off the attachments the letter refers to.
• Calling a true decline seasonal.
• Waiting for the underwriter to ask instead of submitting the package up front.

A round-number or odd deposit with no explanation is a common trigger for questions. Name its date and amount in the letter, and attach the paperwork.

When Does Documentation Stop Being Enough?

Sometimes the honest answer is that a decline simply lowers your loan amount. A bank statement loan turns deposits directly into income, so lower deposits mean lower qualifying income on paper. Each added mortgage also stacks against your personal debt-to-income picture. That matters most if you are scaling a portfolio.

Occupancy is the first fork in the road. A DSCR loan, which qualifies primarily on property-level rental income covering the payment, subject to lender guidelines, is designed for non-owner-occupied investment properties. Owner-occupied homes and second homes cannot use it. If you will live in the property, the bank statement route is the one that applies. Because a pure rental is a business-purpose loan, it is reviewed differently from a standard owner-occupied mortgage.

If the property is a true rental, the choice is open. A bank statement loan tests the borrower. A DSCR loan tests the property. Falling personal deposits have little direct effect on a DSCR ratio. That does not make DSCR automatically better, because thin rent can make the deposit file the stronger one.

For more on how the two compare, see Lendmire’s piece DSCR vs Bank Statement Loan When Deposits Are Uneven or Declining. The complete DSCR loans guide covers how property-based qualification works.

Leverage, in context

Across select lenders in the network, bank statement loans on a primary residence run up to 90% LTV on a purchase or rate-term refinance. Owner-occupied cash-out on a primary or second home runs up to 80% LTV. Investment-property cash-out tops out around 75% LTV. Leverage on an investment purchase using bank statements varies by lender. Loan sizes run roughly $125,000 to $3,500,000, and reserves are commonly around six months of the housing payment. Stronger files earn the top of each range, and a decline can pull you toward the lower end.

If the file is not workable now, the honest path is to build it. Raise reserves, stabilize the property, rebuild deposits, and reapply.

What Should You Do, and When?

Before you apply, classify the dip, separate commingled accounts, and assemble the package. Pull the year-over-year comparison and get the profit-and-loss report prepared.

During review, submit everything together and keep the letter short. Do not move money around.

If the underwriter sends conditions, answer them with documents, not extra narrative. Respond only to what is asked, and keep your answers consistent with the rest of the file.

Next Step

Reach the team at 828-256-2183 or request a quote. Consumer-purpose bank statement programs are offered in 16 states, and every file is subject to lender guidelines.

About Lendmire

As a mortgage broker (NMLS# 2371349), Lendmire helps self-employed and high-net-worth borrowers in 16 states qualify on bank statements, a profit-and-loss statement, 1099s or liquid assets instead of tax returns, through wholesale lenders. Lendmire is never the lender; program terms are set by the lender and its guidelines. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.

References

1. HousingWire, how bank statement loans work

2. Bankrate, bank statement loans

3. CFPB, 12 CFR 1026.43