Depreciation, interest, personal expenses: what really affects net operating income and business value? The answer starts with understanding the line.

Even small differences in how expenses are recorded can change how buyers, lenders, and SBA reviewers see your business. Above-the-line versus below-the-line expenses determine which costs are seen as recurring, which can be added back, and ultimately, how much cash flow is attributed to the business. Getting this right ensures your numbers are clear, defensible, and accurately reflect the value of your business.

We explain how these classifications impact valuations, SDE calculations, and SBA financing; read on to see how understanding the line can make a real difference for your valuation.

In Brief

Understanding above-the-line vs below-the-line expenses is key for small business valuations. It’s important to know that common misconceptions about below-the-line items, such as depreciation, interest, and taxes, are incorrect: these items are never added back. 

Most small business deals today involve SBA financing, which means your financials will be under close scrutiny. How you classify expenses, above the line versus below the line, can have a real impact on valuations and loan approvals.

At a Glance: What Are Above the Line vs Below the Line Expenses?

A Profit & Loss (P&L) statement tracks your revenue, costs, and expenses over a period of time to show your net profit. Within the statement, certain items are categorized as above the line or below the line:

• Above the line: Typically includes sales and COGS (cost of goods sold) or COS (cost of sales/services). These are the direct costs required to generate revenue.

• Net Operating Income or “The Line”: Net operating income is what remains after subtracting direct costs from revenue. It represents the funds available to cover operating expenses, interest, taxes, and other costs. This figure is also generally your taxable profit.

• Below the line: Includes operating expenses, interest, taxes, and other income/expenses. These items are considered below the line because they are applied after gross profit, reducing it to the final net profit that represents what you ultimately retain.

​ATL vs. BTL Expenses: Why The Distinction Matters for Your Small Business Valuation

Understanding above-the-line versus below-the-line expenses directly impacts how a business is valued.

Above-the-line expenses reduce net operating income. Buyers assume they must continue, so high ATL costs can lower the perceived profitability and valuation of the business.

Below-the-line expenses are not added back because you’re essentially double counting. 

• Owner’s personal expenses run through the business

• One-time legal or consulting fees

• Non-recurring marketing campaigns or equipment upgrades

The Add-Back Misconception: Not Everything Below the Line Gets Added Back

For valuation purposes, owners may add back certain expenses to calculate SDE or Adjusted EBITDA. A common misconception is that below-the-line expenses are part of what can be added back.

It’s easy to see why: on your tax return or P&L, these items appear “below the line,” separate from net operating income, so it feels like they’re being excluded.

The biggest confusion comes from depreciation or interest payments, which can appear above the line (above net operating income) or below the line. It often feels like this affects your net profit, but mathematically, it doesn’t. The difference is purely in presentation.

Understanding this distinction is critical. Above the line vs below the line doesn’t change the business’s earnings, but misreading it can lead to mistakes when presenting your financials for a valuation or SBA loan.

Take depreciation as an example. On one P&L, it might be listed as part of operating expenses, reducing net operating income directly. In another, it could appear below net operating income. Let’s put some numbers to it:

• Scenario A: Depreciation above the line
  Revenue: $500,000
  COGS: $200,000
  Operating Expenses (salaries, rent, etc.): $100,000
  Depreciation: $20,000

Net Operating Income = 500,000 − 200,000 − 100,000 − 20,000 = $180,000

SDE = $180,000 + $20,000 (depreciation) = 200,000

• Scenario B: Depreciation below the line
  Revenue: $500,000
  COGS: $200,000
  Operating Expenses (salaries, rent, etc.): $100,000

Net Operating Income = 500,000 − 200,000 − 100,000 = $200,000
Depreciation: $20,000

Net Profit = 200,000 − 20,000 = $180,000

SDE = $200,000 

In both cases, we use operating income as the baseline for SDE, meaning the end result is the same, even though the line where depreciation is recorded is different. The math hasn’t changed—only how it’s presented.

Keep In Mind: Tying Your P&L to Your Tax Returns

Most small business deals today involve SBA financing, which means your financials will be under close scrutiny. While your P&L statement is used to present your business to buyers and support a valuation, your tax returns become critical when SBA financing is involved. How you classify expenses—above the line versus below the line—can have a real impact.

Above-the-line expenses, like salaries, rent, and cost of goods sold, are essential to operations and generally consistent with what the SBA expects to see on tax filings. Below-the-line items, such as one-time consulting fees, personal expenses, or non-recurring marketing costs, are not treated as add-backs in valuations. 

Because above-the-line items directly influence cash flow calculations, the SBA and buyers will want to know which adjustments are verified. Verified adjustments are backed by invoices, receipts, or contracts, confirming they were legitimate, one-time, or discretionary costs. Non-verified adjustments and lacking documentation can raise questions, slow the loan process, or even reduce the SBA-approved loan amount.

Preparation is key. Tie your P&L to your tax returns ahead of time, explain any differences, and make sure every discretionary expense is documented and correctly categorized. By managing your above- and below-the-line classifications thoughtfully, you keep your financials defensible, and you give buyers and lenders a clear, accurate view of your cash flow and operational performance.

Turn Complexity into Confidence With Baton

Managing your finances, preparing tax returns, and presenting your P&L accurately is already a full-time job. The journey from bookkeeping to a defensible, buyer-ready valuation is complex, and small mistakes can have big consequences.

That’s where Baton comes in. We do the heavy lifting for you: reviewing your P&L, ensuring your financial story is clear, and helping you present your business in the best light to buyers and lenders, so nothing is left to chance.