SDE vs EBITDA: Which One Does Your SBA Lender Actually Use?

SDE (Seller's Discretionary Earnings) and EBITDA (Earnings Before Interest, Taxes, Depreciation, and Amortization) are the two primary metrics SBA lenders use to value a business and underwrite an acquisition loan. They measure different things, and SBA lenders apply them at different deal sizes. Using the wrong metric — or calculating either one incorrectly — can misrepresent the business's cash flow by 20–40%, which directly impacts your DSCR calculation and can turn an approvable deal into a decline.

This guide covers the exact definitions, when each applies, how to calculate both from a standard P&L, and the specific mistakes that cause lenders to reject earnings calculations.

What is SDE (Seller's Discretionary Earnings)?

SDE (Seller's Discretionary Earnings) is the standard income metric SBA lenders use to underwrite business acquisitions under $5M in enterprise value. SDE equals net income plus owner compensation, interest, depreciation, amortization, and non-recurring expenses. The logic: in a small business acquisition, the new owner replaces the old one and captures that compensation as available cash flow. A business with $100K net income and $150K in owner salary/perks has an SDE of $250K+ — that's the actual cash the business generates for its owner-operator.

SDE calculation

Start with net income (bottom line of the P&L). Add back: owner's salary and wages, owner's payroll taxes and benefits, interest expense, depreciation and amortization, one-time or non-recurring expenses (legal settlement, moving costs, equipment write-off), personal expenses run through the business (owner's vehicle, personal travel, family cell phones), and any above-market rent paid to a related party. The result is SDE — the total economic benefit the business provides to a single owner-operator.

What is EBITDA?

EBITDA (Earnings Before Interest, Taxes, Depreciation, and Amortization) is the standard earnings metric for larger businesses — typically those above $5M in enterprise value or businesses that will be managed by a hired team rather than the owner. Unlike SDE, EBITDA does not add back owner compensation, because the assumption is that a professional manager will need to be paid a market-rate salary. That salary is a real operating expense, not a discretionary add-back.

EBITDA calculation

Start with net income. Add back: interest expense, income tax expense, depreciation, and amortization. That's it. EBITDA does not include add-backs for owner compensation, personal expenses, or non-recurring items (though "Adjusted EBITDA" sometimes adds back one-time costs). EBITDA is always lower than SDE for the same business because it doesn't include the owner's salary add-back.

When does your SBA lender use SDE vs EBITDA?

The general rule among SBA lenders: SDE for businesses under $5M enterprise value where the buyer will be the operator, EBITDA for businesses above $5M or where the buyer is installing a management team. However, this isn't an SBA regulation — it's a lending convention. Some lenders use EBITDA for all deals above $2M. Others use SDE up to $10M if the buyer is operating. Always ask your lender which metric they'll use before building your projections — using the wrong one means your DSCR calculation won't match theirs.

Why the difference matters for your loan

Consider a business with $120K net income, $180K owner salary, $30K interest, $25K depreciation, and $15K in non-recurring legal fees. SDE = $120K + $180K + $30K + $25K + $15K = $370K. EBITDA = $120K + $30K + $25K = $175K. Same business, same financials — but SDE is more than double EBITDA. If the loan requires $200K annual debt service and the lender needs a 1.25x DSCR, you need $250K in available cash flow. Under SDE ($370K), you pass easily. Under EBITDA ($175K), you fail.

Key insight: The choice between SDE and EBITDA isn't academic — it can be the difference between approval and denial on the exact same deal. Always confirm which metric your lender uses before submitting projections.

Common mistakes in SDE and EBITDA calculations

1. Double-counting owner compensation. If the owner takes both a W-2 salary and distributions, make sure you're adding back both — but only the actual compensation, not retained earnings left in the business.
2. Adding back recurring expenses as "non-recurring." A legal fee from a one-time lawsuit is non-recurring. Annual legal retainer fees are not. Lenders will scrutinize every add-back and reject anything that looks like a regular operating expense repackaged as one-time.
3. Using SDE when the lender expects EBITDA (or vice versa). This is the most common and most costly mistake. Your projections, DSCR, and valuation multiple all depend on which metric you're using. A 3x multiple on $370K SDE is a $1.1M valuation. A 3x multiple on $175K EBITDA is a $525K valuation. Same business.
4. Not adjusting for above-market related-party transactions. If the current owner pays themselves $50K/year rent for a property they own (when market rent is $30K), the $20K difference is an add-back. Most buyers miss this because it requires knowing the market rate.

Frequently asked questions

Q: What's the difference between SDE and EBITDA?

A: SDE (Seller's Discretionary Earnings) adds back the owner's total compensation to net income, along with interest, depreciation, amortization, and non-recurring expenses. EBITDA only adds back interest, taxes, depreciation, and amortization — it does not include the owner's salary. SDE is used for small businesses (typically under $5M) where the buyer will operate the business. EBITDA is used for larger businesses or those with professional management. SDE is always higher than EBITDA for the same business.

Q: What SDE multiple do SBA lenders use to value a business?

A: SBA lenders don't set a fixed multiple — valuations depend on the industry, growth trajectory, customer concentration, and other risk factors. However, most SBA-financed small business acquisitions trade at 2.0x–4.0x SDE. Service businesses with recurring revenue tend toward the higher end. Businesses with owner-dependent revenue or customer concentration tend toward the lower end. The SBA does not cap the purchase price multiple, but the DSCR must still work — a high multiple means higher debt service, which requires higher earnings to maintain the 1.25x minimum.

Q: Should I use SDE or EBITDA in my SBA loan application?

A: Ask your lender before building your financial model. The general convention is SDE for owner-operated businesses under $5M enterprise value, and EBITDA for larger businesses or those with hired management. But individual lenders have their own preferences. Using the wrong metric means your DSCR calculation won't match the lender's, which creates confusion at best and a decline at worst. When in doubt, present both metrics side-by-side in your projections.

Get the numbers right the first time

Backable calculates both SDE and EBITDA automatically from your uploaded P&L and tax returns, identifies valid add-backs, and builds projections using the metric your lender expects. No spreadsheet gymnastics. No second-guessing which expenses qualify as add-backs. Upload your documents and get a defensible earnings calculation in minutes.

Last updated: April 2026. This guide is updated quarterly.