What Is Seller's Discretionary Earnings (SDE)?Definition, Formula, Examples

Business brokers and M&A advisors use SDE as the foundation for pricing owner-operated businesses in nearly every industry. When a business with $400,000 in SDE operates in a sector with a 2.5x median multiple, the baseline asking price is $1,000,000 before adjustments for risk factors like customer concentration, owner dependency, and revenue trends. Sellers who accurately calculate SDE with defensible add-backs position themselves to negotiate from a stronger starting point.

Lenders also rely on SDE to evaluate whether a buyer can service acquisition debt. The Small Business Administration (SBA), which guarantees a large share of business acquisition loans, requires that the projected SDE cover the annual debt service by a ratio of at least 1.25:1. This means the SDE calculation directly determines how much financing a buyer can obtain, which in turn sets the ceiling on achievable transaction prices.

For business owners not yet ready to sell, tracking SDE year over year serves as a performance dashboard. Growing SDE signals improving profitability and operational efficiency, both of which compound the eventual sale price. Conversely, declining SDE — even with rising revenue — warns that cost structures are eroding the value a buyer would pay.