# Bank Statement Loan Expense Factor Explained

> How a bank statement loan expense factor turns deposits into income, and when a CPA letter or P&L can lower it. Learn your options and see if you qualify.

Canonical: https://smallbusinessmortgages.com/blog/bank-statement-loan-expense-factor/
Author: Apurva Sanghavi
Published: 2026-10-17T17:45:10.035Z
Tags: bank statement, Bank Statement Loans, profit and loss, self-employed, mortgage

You deposited a healthy six figures into your business account last year. Then a lender told you they'd only count about half of it. Another broker went further and subtracted every single withdrawal, which left you looking broke. Frustrating? Absolutely. But once you understand the bank statement loan expense factor, you can make sure the method a lender uses actually fits your business.

This guide explains what the expense factor is, the three main ways lenders apply it, and why the choice can swing your qualifying income more than almost anything else in the file.

> **Key takeaways**
> - Lenders apply an expense factor to business bank deposits to estimate how much is actually profit.
> - The three common approaches are a fixed expense factor, a CPA or tax-preparer expense letter, and a profit and loss statement.
> - Service businesses with low overhead can often benefit from documenting a lower expense ratio.
> - Personal bank statements are usually treated differently, since business expenses are paid before money reaches you.
> - Subtracting every withdrawal is not how bank statement programs typically work, so compare methods and lenders.

## What a bank statement loan expense factor is

When you use business bank statements, a lender sees gross revenue. Your deposits include money that will go right back out for payroll, rent, supplies, fuel, software, and everything else it takes to run your business.

The expense factor is the lender's way of estimating how much of that revenue is left as income. It's a percentage that gets subtracted from eligible deposits before the lender calculates your monthly average.

The basic formula looks like this:

**Eligible deposits × (1 − expense factor) × your ownership share ÷ number of months = qualifying monthly income**

That's it. Every bank statement program uses some version of this math. What changes is how the expense factor gets set. For a broader view of the calculation, see our guide on [how lenders calculate self-employed income](/blog/how-lenders-calculate-self-employed-income/).

## Method 1: the fixed expense factor

Most lenders start with a standard expense factor. For business bank statements, it's often somewhere around 50%, though the number varies by lender and sometimes by business type or number of employees.

**Pros:**
- Simple, predictable, and requires no extra paperwork
- Works well for businesses whose real expenses are close to the standard factor

**Cons:**
- Doesn't reflect businesses with low overhead
- Can understate income for consultants, coaches, designers, and other service businesses

Some lenders publish different standard factors for different industries, recognizing that a trucking company and a bookkeeping practice have very different cost structures. That variation is one reason shopping multiple lenders matters.

## Method 2: the CPA or tax-preparer expense letter

Many lenders allow you to replace the standard factor with your actual expense ratio, as long as a qualified professional supports it. Typically that means a CPA, enrolled agent, or licensed tax preparer writes a letter stating your business's expense ratio based on their knowledge of your books.

If your real expenses are well below the standard factor, this can raise your qualifying income meaningfully. Some lenders set a floor on how low the factor can go, and requirements for who can sign the letter vary.

What the letter typically includes:

- How long the professional has prepared your taxes or books
- Your business name and your ownership percentage
- Your business's expense ratio as a percentage of gross receipts
- The professional's license or credentials and contact information

Our full guide to the [CPA letter for a mortgage](/blog/cpa-letter-for-mortgage/) covers what lenders look for and the common reasons letters get rejected. One caution: the expense ratio in the letter should be consistent with your tax returns. If your returns show far higher expenses, the underwriter may question the letter.

## Method 3: the profit and loss statement

Some lenders let you document expenses with a profit and loss statement covering the same period as your bank statements. Others offer a separate P&L-based program entirely.

With this approach, the lender compares your P&L revenue to your bank deposits. If they line up reasonably well, the lender may use the net income from the P&L instead of a fixed factor. Many lenders want the P&L prepared or reviewed by a CPA or tax preparer.

This method can work well for businesses with expenses that don't fit neatly into a standard factor, either higher or lower. If you want to compare the two approaches, our guide on [P&L loans vs bank statement loans](/blog/p-and-l-loan-vs-bank-statement-loan/) breaks it down.

> **Not sure which method fits your business?** We can compare how different lenders would treat your deposits before you apply. [See if you qualify →](/apply/)

## Why service businesses often benefit from a lower factor

Think about what it costs to run different businesses.

A hypothetical restaurant owner spends heavily on food, labor, rent, and utilities. A standard expense factor may be close to reality, or even generous.

A hypothetical marketing consultant working from home has a laptop, some software subscriptions, and maybe a part-time contractor. Their real expense ratio might be far lower than a standard factor assumes.

If that consultant accepts a standard factor, the lender treats half their revenue as expenses that don't exist. A CPA letter documenting their actual ratio can close that gap.

### Illustrative example — not an offer or a guarantee of qualifying income

Take that hypothetical consultant, who owns 100% of the business, with $200,000 in eligible deposits over 12 months.

| Method | Expense factor | Net after expenses | Monthly qualifying income |
|---|---|---|---|
| Standard factor | 50% | $100,000 | about $8,333 |
| CPA letter (hypothetical) | 25% | $150,000 | $12,500 |

That's a difference of about $4,167 per month in qualifying income, just from documenting real expenses. Lender limits, minimum factors, and your actual ratio will determine what's possible in your case.

## Business vs personal bank statements: different treatment

The expense factor mostly applies to **business** bank statements. **Personal** statements are usually handled differently.

When you pay yourself from your business into your personal account, those transfers have already had business expenses taken out. Many lenders count eligible personal deposits at or close to their full value, without a business expense factor. In return, lenders often want to see some business statements too, to confirm the deposits come from your business and not elsewhere.

Which is better depends on how you run your money. If you pay yourself regular, consistent draws, personal statements may give a clean picture. If you leave most of the money in the business, business statements with a fair expense factor may show more. Our guide on [business vs personal bank statements for a mortgage](/blog/business-vs-personal-bank-statements-mortgage/) walks through how to decide.

## "They subtracted all my withdrawals." Is that right?

We hear this one a lot. A borrower talks to a lender or broker who adds up deposits, subtracts every withdrawal, and calls the remainder income. On that math, most healthy businesses look like they barely break even.

That's generally not how bank statement programs work. Withdrawals include owner draws, transfers to savings, tax payments, debt payments, and personal spending. Subtracting all of it double-counts expenses and ignores money you actually earned.

Standard bank statement programs use deposits with an expense factor, a CPA expense letter, or a P&L. If someone is calculating income by subtracting every withdrawal, it's worth getting a second opinion from a broker who specializes in self-employed borrowers.

## What counts as an eligible deposit before the factor applies

The expense factor only applies to eligible deposits. Before any factor kicks in, underwriters typically remove:

- Transfers between your own accounts
- Loan proceeds, lines of credit, and credit card advances
- Refunds and reversals
- One-time non-business deposits
- Large deposits that can't be sourced

Getting this step right matters just as much as the factor itself. Our [bank statement loan requirements](/blog/bank-statement-loan-requirements/) guide covers deposit sourcing and other qualification basics.

## How to get the best expense factor for your business

1. **Know your real expense ratio.** Look at your recent tax returns or books with your CPA.
2. **Compare it to typical standard factors.** If your ratio is meaningfully lower, a CPA letter may help.
3. **Ask your CPA or tax preparer early** whether they're comfortable signing an expense letter. Some firms have policies about this.
4. **Make sure the letter matches your returns.** Consistency builds underwriter trust.
5. **Consider a P&L option** if your expenses are unusual or your revenue doesn't fit a standard factor well.
6. **Shop lenders.** Standard factors, letter requirements, and minimum factors vary, and one lender's guideline can produce a very different result from another's.

## Frequently asked questions

**Q: Why do lenders only count about half of my deposits?**<br />A: Many lenders apply a standard expense factor to business statements, often somewhere around 50%, to estimate how much revenue goes to business costs. If your real expenses are lower, some lenders allow a lower factor with a CPA or tax-preparer letter or a P&L.

**Q: Can my CPA letter state any expense ratio I want?**<br />A: No. The letter should reflect your actual expense ratio based on your books and tax filings, and lenders often compare it to your returns. Many lenders also set a minimum factor they'll accept regardless of the letter.

**Q: Is the expense factor applied to personal bank statements?**<br />A: Usually not in the same way. Personal deposits from your business have already had expenses removed, so many lenders count them at or near full value, often while reviewing some business statements to confirm the source.

**Q: Does the expense factor change with the number of employees?**<br />A: With some lenders, yes. A few use different standard factors based on industry or staff size, reflecting that businesses with payroll typically have higher costs. Guidelines vary by lender.

**Q: Can I use both a CPA letter and a P&L?**<br />A: Some lenders accept either, and a few may want both depending on the program. Your broker can tell you which documentation a given lender prefers so you don't prepare more than you need.

## Make sure your deposits are counted fairly

The expense factor is one of the biggest levers in a bank statement loan, and it's often set without the borrower realizing there are options.

At Matador Lending, we compare how 150+ wholesale lenders treat your deposits, including standard factors, CPA letters, and P&L programs. We'll show you which approach fits your business and be upfront about the trade-offs.

**[See if you qualify →](/apply/)** — no credit pull to check your options. Prefer to talk? Call or text 713-366-4668.