How Do Lenders Handle Business Expense Ratios When Calculating Income From Business Bank Statements?

When you’re self-employed, your bank account tells a story that your tax returns often hide. You might see six figures in annual deposits, yet your tax professional works hard to keep your taxable income as low as legally possible through deductions and depreciation. That’s great for your tax bill, but it creates problems when you want to buy a luxury home or refinance an existing property.

This is where bank statement loans come in. Instead of looking at the “bottom line” on your 1040s, lenders look at the “top line” of your business deposits. But they don’t assume every dollar deposited is pure profit. They apply something called an expense ratio to determine your qualifying income. Understanding how this ratio works is what gets your loan approved with the terms you actually need.

What Is a Business Expense Ratio and Why Does It Matter?

In traditional mortgage lending, your income is whatever’s left over after all your business expenses are deducted on your tax returns. In bank statement loans, lenders use a more flexible approach. They start with your total eligible deposits and then subtract a percentage to account for the costs of running your business. This percentage is your expense ratio.

Lenders use this ratio because they know that no business runs for free. Whether you’re a freelance consultant or a general contractor, you have overhead. The expense ratio is the lender’s way of estimating your net take-home pay without requiring years of tax documentation. It bridges the gap between your gross revenue and your actual “spendable” income.

The standard default expense ratio used by many lenders is 50%. This means if you deposit $20,000 a month into your business account, the lender will typically “haircut” that amount by half, leaving you with $10,000 in qualifying monthly income. But as a business owner, you know that your actual expenses might be much lower than 50%, and that’s where the nuance of these loan programs comes into play.

How the Calculation Impacts Your Buying Power

Your qualifying income is the primary driver of your debt-to-income (DTI) ratio. If a lender uses a 50% expense factor, but your actual expenses are only 10%, you’re losing 40% of your purchasing power in the eyes of the underwriter. Learning how bank deposits are calculated for a bank statement loan and the specific expense factors applied can make the difference between qualifying for a $500,000 home or a $1,500,000 home.

The Default 50% Expense Factor vs. The Custom Factor

Most bank statement programs start with a baseline assumption that your business operates at a 50% expense margin. This is a “safe” number for lenders because it covers a wide variety of industries. If you don’t provide any documentation about your overhead, the underwriter will apply this 50% factor automatically.

But you’re not stuck with that 50% figure. If your business is lean—maybe you work from home or provide professional services with little overhead—you may qualify for a lower expense ratio. Lenders generally allow for a custom expense factor if you can provide a letter from a licensed tax preparer or CPA. This letter verifies your business type and provides an estimated expense percentage based on your actual operations.

Common expense factors we see in the industry include:

• Service-Based (10% – 25%): Consultants, lawyers, accountants, and software developers often have very low overhead.
• General Professional (25% – 35%): Real estate agents, therapists, and designers who may have office rent and marketing costs.
• Product-Based or Heavy Labor (50% or higher): Retailers, restaurants, and construction companies with high material and labor costs.

The Role of the CPA Letter

To move away from the 50% default, your CPA will need to sign a statement affirming your business’s expense ratio. The lender isn’t looking for an audit—they want a professional opinion that supports the income you’re claiming. If your CPA can verify that your business operates at a 20% expense factor, the lender may use 80% of your deposits as qualifying income, significantly boosting your loan eligibility.

Using a Profit & Loss Statement to Determine Income

In some cases, a lender might look at a Profit & Loss (P&L) statement instead of just applying a flat percentage to your deposits. This is often referred to as a “P&L Only” or “P&L with Bank Statement” program. Here, the lender reviews your self-prepared or CPA-prepared P&L to see exactly where your money goes.

When you use this method, the lender will cross-reference the P&L with your bank statements to make sure the deposits match up. They want to see that the “Total Income” line on your P&L aligns with the “Total Deposits” in your bank accounts. This method works well for business owners who have fluctuating expenses or who have recently scaled back their overhead costs.

Understanding how bank statement loans calculate your income through these various methods allows you to choose the path that reflects your financial strength most accurately. If your P&L shows a 15% expense ratio and your bank statements support the revenue, that’s the figure we want the underwriter to use.

How Your Industry Influences the Lender’s Decision

Lenders aren’t just looking at numbers—they’re looking at the logic behind the numbers. Every industry has a “standard” range of expenses. If you’re a landscape contractor claiming a 10% expense ratio, an underwriter will be skeptical. Why? Because landscaping requires trucks, fuel, equipment, and labor—all of which cost money.

On the other hand, if you’re a remote copywriter or a digital marketing consultant, a 10% or 15% expense ratio makes complete sense. You have a laptop, some software subscriptions, and maybe a home office. Your “product” is your time and expertise, which doesn’t carry a high cost of goods sold.

Common Industry Expense Benchmarks

While every lender has their own internal guidelines, here’s a general look at how they view different sectors:

• E-commerce/Retail: Typically seen as high-expense (60%-80%) due to inventory costs.
• Trucking/Logistics: High-expense (70%+) due to fuel, maintenance, and insurance.
• Medical Professionals: Low to medium (20%-40%) depending on whether they own a private practice with staff or work as a 1099 contractor.
• IT/Software Consulting: Low-expense (10%-20%) as most costs are personal labor.

If your business falls into a high-overhead category but you’ve found a way to keep costs exceptionally low, be prepared to explain that “why” to your lender. Documentation is your best friend in these scenarios.

Personal vs. Business Bank Statements: The Expense Ratio Difference

One of the most common questions I get is whether it matters if you use personal or business bank statements. The answer is yes, especially when it comes to expense ratios. Lenders treat these two types of accounts very differently because of how the money is comingled.

When you provide 12 or 24 months of business bank statements, the lender must apply an expense ratio because they assume the account is paying for business operations. But if you provide personal bank statements, many lenders will count 100% of the deposits as income without applying an expense ratio.

Wait—why the difference? The logic is that if you’re transferring money from a business account into a personal account, the “expenses” have already been paid at the business level. The money hitting your personal account is your “draw” or your “net pay.” For more on this strategy, you should look into personal vs. business bank statements and which one fits your specific business structure better.

The “100% Rule” for Personal Statements

To use the 100% deposit rule with personal statements, you typically need to show that you have a separate business account and that the transfers into your personal account are consistent. If you’re a sole proprietor using one single account for everything, the lender will treat it as a business account and apply the expense ratio regardless of the account name.

Red Flags That Can Increase Your Estimated Expenses

Lenders are always looking for “stability” and “continuity.” Even if you have a CPA letter stating a 20% expense ratio, certain patterns in your bank statements can cause an underwriter to dig deeper or even increase that ratio. They’re looking for signs that your business might be more expensive to run than you’re claiming.

Some common red flags include:

1. Non-Sufficient Funds (NSF) Fees: Frequent overdrafts suggest that your expenses are uncomfortably close to your total revenue, regardless of what your P&L says.
2. Large, Unexplained Withdrawals: If you’re moving large chunks of cash out of the account frequently, the lender may categorize these as business expenses rather than personal draws.
3. Declining Deposit Trends: If your deposits are significantly lower in the most recent three months compared to the previous nine, the lender may use the lower average or question the viability of your expense margin.
4. High Volume of Small Transactions: A massive amount of small debits often indicates high operational overhead, which can make a low expense ratio claim harder to justify.

By keeping your business accounts clean and well-organized for at least 12 months before applying, you put yourself in the best position to argue for the lowest possible expense ratio.

How to Optimize Your Income for Your Application

If you’re planning to apply for a bank statement loan in the near future, there are steps you can take today to make sure your expense ratio works in your favor. I always recommend a “pre-flight” review of your statements before we submit them to underwriting.

First, talk to your CPA. Make sure they’re comfortable signing an expense factor letter that accurately reflects your business. If you’ve recently cut costs—maybe by moving to a virtual office or automating certain processes—make sure your P&L reflects those changes. A lender will generally accept a well-documented explanation for why your expenses are lower than the industry average.

Second, consider your account structure. If you’re currently comingling personal and business funds, now is the time to separate them. Establishing a clear “paycheck” transfer from your business to your personal account can simplify the underwriting process and potentially allow you to use the 100% deposit rule mentioned earlier.

Bank statement loans are designed to be flexible. They’re built for people like you—entrepreneurs and business owners who don’t fit into the “W-2 box.” While the expense ratio might seem like a hurdle, it’s actually a tool that allows us to tell the story of your business’s success without the constraints of traditional tax returns. With the right approach and a clear understanding of the math, you can secure the financing you need to grow your real estate portfolio or move into your dream home.

Tim Popp
Branch Manager, West Capital Lending
NMLS #2039627
Licensed in 36 states + DC

Tim Popp, NMLS #2039627 | West Capital Lending | Licensed in 36 states + DC. This content is for informational purposes only and does not constitute a commitment to lend or a guarantee of loan approval. All loan programs subject to borrower eligibility, property requirements, and lender terms.