How to Calculate SDE (Seller's Discretionary Earnings)

Seller's Discretionary Earnings (SDE) estimates the total financial benefit a single full-time owner-operator receives from a business in a year. It is the earnings measure most commonly used for smaller, owner-operated businesses.

The SDE formula

Step by step

1. Start with pre-tax net income from the business tax return or profit and loss statement for a full year.
2. Add back one owner’s total compensation. If there are two working owners, add back only one and treat the second as a cost the new owner would have to replace.
3. Add back interest, because the buyer’s financing will be different.
4. Add back depreciation and amortization, which are non-cash expenses.
5. Add back personal or discretionary expenses, such as a personal vehicle or family cell phones, only if they are documented.
6. Add back truly one-time costs, such as a one-off legal settlement, with supporting records.

Worked example

Mistakes that distort SDE

• Adding back more than one owner’s salary.
• Treating recurring costs, such as annual equipment repairs, as one-time.
• Ignoring the capital expenditures needed to keep the business running.
• Using a partial year or an unusually strong year without context.

When SDE is the right metric

SDE fits businesses where the buyer will also be the operator, which is typical for many main-street businesses. Larger businesses with a management team in place are usually discussed in terms of EBITDA instead.

Calculate SDE from a P&L or tax return without double counting

First identify the period and the accounting basis. A calendar-year tax return, fiscal-year P&L, and trailing-twelve-month report can tell different stories. Use a defined period, retain the original statement, and make each adjustment visible. If the statement already shows pre-tax income, do not add income taxes again.

SDE is an adjusted earnings measure, not a line that every accounting system produces consistently. The IBBA glossary describes discretionary earnings before income taxes, financing and noncash items, certain nonoperating or nonrecurring items, and one owner's compensation and personal expenses. Use that definition as a starting point, then explain the actual reconciliation for the business.

An add-back restores an expense already deducted in the starting income figure. Owner draws or distributions that never reduced P&L earnings cannot simply be added to income. Likewise, a capital purchase posted to the balance sheet is not a current operating expense you can add back again. Ask an accountant to trace ambiguous items before building the schedule.

Build an SDE add-back schedule buyers can test

A defensible schedule can contain negative adjustments as well as add-backs. If rent will increase after the sale, or a family member works without market compensation, earnings may need to decrease. A worksheet that only adds costs back and never recognizes missing expenses can overstate the buyer's opportunity.

For every entry, record the original account, amount, reason, supporting document, and whether the adjustment is accepted, disputed, or still being reviewed. This lets the broker, buyer, lender, and accountant discuss a specific issue rather than argue over a single unexplained headline number.

How to calculate SDE when two owners work in the business

The one-owner convention does not mean that the work performed by every other owner disappears. Identify each role, its actual compensation, and the ongoing cost required after the sale. Retain a representative expense for a second working role or normalize it to a supportable replacement cost. Do not add back both full salaries unless the staffing plan genuinely supports the adjustment.

Suppose the $280,000 SDE example above adds back one owner's compensation, while a second owner's $70,000 compensation remains an expense in the original P&L. If that second role will require a $90,000 fully burdened replacement cost, subtract the $20,000 difference. The normalized SDE becomes $260,000. It would be misleading to remove the second salary completely while assuming the same work still gets done.

Repairs, deferred maintenance, and projected growth are not automatic add-backs

A repair can be unusual in size while maintenance is a normal recurring need. A service business with aging vehicles may face more spending after closing, not less. Review several years of maintenance, the condition of equipment, and planned capital expenditures before treating a large invoice as entirely nonrecurring.

Separate historical earnings from projections. A buyer's hoped-for marketing improvement, new contract, or purchasing synergy is not historical SDE. Show a forecast separately with its assumptions and costs. Also remove unusual income where appropriate: an adjustment process should normalize both expenses and benefits.

SDE is not your annual take-home pay after buying the business

Debt principal generally does not reduce P&L net income, but it still consumes cash. SDE also does not reserve money to replace equipment, absorb seasonal cash needs, or support personal taxes. If you hire someone to perform the owner role whose compensation was added back, include that replacement cost as well. Do not subtract a manager cost twice if it was already retained in the earnings calculation.

This bridge is a planning illustration, not a substitute for a cash-flow forecast. Timing matters: customers may pay later than payroll and suppliers are due. Build a monthly plan for the first year and test weaker revenue, lost customers, or unexpected repairs instead of assuming annual earnings arrive evenly each month.

Questions to ask when a listing quotes SDE

• Which period does the number cover: prior year, trailing twelve months, or a projection?
• Does the reconciliation tie to the P&L and tax returns, and are accounting-basis differences explained?
• How much does the owner work, and which duties are included in the one-owner assumption?
• Which add-backs have documentation, and which have been accepted by the buyer's lender?
• Will rent, payroll, licensing, insurance, or supplier terms change after closing?
• What capital expenditures and working capital will the buyer need outside the purchase price?

SDE calculation questions

Can you add back an owner's entire salary?

For an owner-operated business, SDE conventionally removes one owner's compensation already deducted in the starting income. You still need to understand the role and ongoing staffing requirements. A passive buyer must account for the person hired to do that work.

Can undocumented cash sales be included in SDE?

A buyer or lender needs earnings they can substantiate. Do not build the purchase case on claimed revenue that cannot be reconciled to reliable records. Seek an accountant's review of discrepancies rather than treating an informal claim as verified cash flow.

Can SDE be negative?

Yes. The adjustments do not guarantee a profitable business. A positive number can also turn negative after necessary staffing, rent, and other operating costs are normalized. A formula cannot compensate for weak underlying economics.

SDE bridge example

Once you have SDE, the next questions are what it is worth and whether it holds up. See business valuation multiples by industry for how SDE is turned into a price, and the due diligence checklist for how add-backs are tested. If the business is large enough to be priced on EBITDA, SDE vs. EBITDA explains the conversion.