If you have started researching what your business is worth, you will likely have encountered the term SDE. Seller's Discretionary Earnings is the most widely used valuation basis for owner-operated small businesses in the UK and across most English-speaking markets. It is the figure that buyers, lenders, and brokers use when they talk about a business's earnings in the context of a sale.
Despite its widespread use, SDE is poorly understood by most business owners. Many sellers enter a sale process not knowing what their SDE is, how it is calculated, or how buyers and their advisers will interpret it. This creates a significant information asymmetry that typically works against the seller.
This article explains SDE from first principles: what it is, how to calculate it for a salon or beauty business, what can and cannot legitimately be included, how buyers use it to arrive at a valuation, and what you can do to maximise and evidence it before going to market.
What SDE actually is
Seller's Discretionary Earnings is a measure of the total financial benefit a working owner derives from a business in a given year. It is designed to answer a specific question: if I were the working owner of this business, what would it be worth to me financially in a normal trading year?
The answer includes not just the net profit that appears on the accounts but also the owner's salary and any personal benefits that have been run through the business. This is because in a small owner-operated business, the distinction between business profit and owner compensation is often blurred. The owner may take a low salary to reduce the tax liability and leave more in the business, or may run personal expenses through the business that would otherwise come from personal income. SDE adjusts for all of this to produce a single figure that represents the true total benefit of ownership.
This is different from EBITDA, which is the measure used for larger businesses and which does not include owner compensation. It is also different from net profit as reported in the accounts, which may significantly understate or overstate the true earning power of the business depending on how the owner's remuneration has been structured.
Why SDE is used for smaller businesses and not larger ones
For businesses above a certain size, typically those with turnover above around two million pounds or with management structures in place that mean the business runs without the owner working in it, buyers use EBITDA: earnings before interest, tax, depreciation, and amortisation. EBITDA strips out financing and accounting decisions to show the underlying operational earnings of the business.
EBITDA assumes that the business is managed by employees rather than the owner. It is appropriate for businesses where the owner is a director or investor rather than a practising operator.
For smaller owner-operated businesses, EBITDA produces a misleading result. If the owner is working in the business full time and taking a modest salary, the EBITDA figure looks artificially low because it does not reflect the full economic benefit the owner is extracting. A buyer for this type of business is not just acquiring an investment. They are acquiring a role, and the SDE figure reflects the total value of both.
SDE is therefore the appropriate measure for most salon and beauty businesses in the UK. The owner is typically the working operator, the salary is often structured for tax efficiency rather than to reflect market rates, and personal benefits run through the business are a normal and expected feature of the accounts.
How SDE is calculated
SDE starts with net profit from the accounts and then adds back a specific set of items to produce the adjusted earnings figure.
The calculation follows this structure:
Net profit per accounts
Plus: owner's total compensation (salary, dividends, pension contributions made by the business on the owner's behalf)
Plus: interest expense on business debt (if the buyer will acquire the business debt-free)
Plus: depreciation and amortisation
Plus: legitimate personal expenses run through the business
Plus: one-off or non-recurring costs that will not continue under new ownership
Minus: any non-recurring income that will not continue under new ownership
Equals: Seller's Discretionary Earnings
Each of these components requires careful analysis and honest application.
Owner compensation
This is typically the largest add-back in a salon or beauty business. It includes everything the business pays to the owner: salary, dividends, bonuses, pension contributions made by the company, and any other direct financial benefits.
The logic is that a buyer will take over the owner's role and will compensate themselves differently. The SDE calculation removes the current owner's compensation entirely and leaves the buyer to determine their own.
This add-back is straightforward for an owner taking a salary through payroll. It becomes more complex when the owner takes a combination of salary and dividends, or when the owner's compensation is partially obscured through family member salaries or other structures.
Depreciation and amortisation
These are non-cash accounting charges that reduce the profit figure on paper without representing actual cash leaving the business. Adding them back gives a truer picture of the cash the business generates. Buyers and lenders focus on cash generation, and depreciation is an accounting convention rather than a real cost in the current period.
Note that adding back depreciation does not mean the business has no ongoing capital expenditure requirements. Equipment wears out and needs replacing. A buyer will factor this into their own projections separately from the SDE calculation.
Personal expenses
This category requires the most careful and honest treatment. Personal expenses run through the business are common and, within limits, legitimate. They become a problem in the SDE calculation when they are overstated, poorly documented, or implausible.
Legitimate personal expenses that can typically be added back include a portion of a vehicle cost where the vehicle has a clear personal use element, personal mobile phone costs where the phone is genuinely primarily personal, personal subscriptions and memberships that have no meaningful business purpose, and personal travel costs that are clearly not business-related.
Expenses that cannot be added back without serious credibility problems include: cash withdrawals without clear purpose or documentation, personal expenses that would be difficult to explain to a buyer's accountant, expenses that appear to be disguised wages rather than genuine costs, and any expenses that are not clearly and separately identifiable in the records.
The standard that applies is not what you know to be true about your own expenses. It is what you can demonstrate credibly to a sophisticated buyer and their advisers. Any add-back that a buyer's accountant cannot independently verify from the records will be challenged or simply ignored.
One-off and non-recurring costs
These are genuine costs incurred in the measurement period that will not recur in normal trading. Common examples in a salon or beauty business context include a one-time legal cost arising from a specific dispute or contract negotiation, exceptional repair or refurbishment costs that are clearly outside normal maintenance, a one-time redundancy payment, or costs associated with a specific event that is not part of normal operations.
The key test for a one-off cost is whether it is genuinely non-recurring and whether it can be clearly evidenced as such. A cost that appears every year or every few years is not a one-off. Routine maintenance is not a one-off even if the specific bill was higher than usual. Buyers will look at several years of accounts and will notice if the same type of cost keeps appearing as a one-off add-back.
Non-recurring income
The SDE calculation also requires an honest deduction for any income that appeared in the measurement period but will not continue. This might include a one-time payment from a supplier, a specific project that is not part of the ongoing business, or a period of unusually high demand that is not representative of normal trading.
Including non-recurring income in the SDE figure without disclosure is the kind of issue that surfaces in due diligence and damages the seller's credibility at the worst possible moment.
The measurement period
SDE is typically calculated on a trailing twelve-month basis, meaning the most recent complete twelve months of trading. For businesses where performance has been changing, buyers and brokers often look at a weighted average across two or three years, giving more weight to the most recent period.
In practice, the measurement period can be negotiated. If your business has been growing and the most recent twelve months are significantly stronger than prior years, you will want to emphasise the trailing twelve-month figure. If there was an exceptional event in the trailing twelve months, such as a period of closure or an unusual cost, you may want to use a normalised figure that adjusts for it, explained clearly.
The measurement period matters because the multiple is applied to the SDE figure, and the difference between a strong and a weak SDE figure can be substantial. A ten thousand pound difference in the SDE figure at a multiple of three is a thirty thousand pound difference in the headline valuation.
How buyers apply a multiple to SDE
Once the SDE figure is established, a buyer applies a multiple to arrive at a valuation. For most owner-operated UK health and beauty businesses, this multiple falls between one and a half and three and a half times SDE.
The multiple is not fixed or standardised. It is the buyer's assessment of risk, packaged as a number. A higher multiple reflects a buyer's confidence that the SDE will continue and that the transition from the current owner will be smooth. A lower multiple reflects concern about the sustainability of the earnings or the difficulty of the transition.
The key factors that influence the multiple are:
Owner dependency. The more the SDE depends on the owner personally, the lower the multiple. A business where the owner generates most of the revenue directly is riskier to buy than one where the revenue comes from a stable team.
Lease security. A long, assignable lease with a known landlord reduces risk. A short lease or one with uncertain assignment terms increases it.
Staff stability. Employed staff on proper contracts are lower risk than a predominantly self-employed workforce on no notice.
Financial clarity. A clean set of accounts with clearly evidenced add-backs reduces risk. Complicated, poorly organised, or unreliable financials increase it.
Client retention evidence. Evidence of strong repeat business, high rebooking rates, and client loyalty reduces the concern that revenue will leave with the owner.
Trading trends. A business with consistent or growing performance is less risky than one with declining revenue or unexplained fluctuations.
SDE versus EBITDA: a practical comparison
It is useful to understand the difference between these two measures in a practical context, because you may encounter both in conversations with buyers, advisers, or lenders.
Consider a salon with the following profile in a given year:
| Line item | Amount |
|---|---|
| Turnover | £280,000 |
| Wage costs (including owner salary of £30,000) | £140,000 |
| Rent and rates | £36,000 |
| Other operating costs | £52,000 |
| Net profit per accounts (after owner salary) | £22,000 |
| Depreciation | £8,000 |
| One-off legal cost | £4,500 |
EBITDA calculation: Net profit £22,000 plus interest (assume nil) plus depreciation £8,000 equals £30,000. One-off legal cost of £4,500 could be added back for normalised EBITDA of £34,500.
SDE calculation: Net profit £22,000 plus owner salary £30,000 plus depreciation £8,000 plus one-off legal cost £4,500 equals £64,500.
At a multiple of two and a half times:
| Measure | Valuation |
|---|---|
| EBITDA | £86,250 |
| SDE | £161,250 |
The difference is substantial. For an owner-operated business where the owner is working in the role, SDE is the correct basis. Using EBITDA for a business of this type would produce a figure that significantly understates the value to a working buyer.
How to present SDE credibly to buyers
Understanding the calculation is one thing. Presenting it credibly to buyers is another. The two most common problems in SDE presentation are overstated add-backs and poor documentation.
Overstated add-backs occur when owners include expenses that cannot be clearly demonstrated as personal or non-recurring, or when the add-back figure seems implausibly large relative to the business's size. A buyer's accountant who sees an add-back schedule that accounts for forty thousand pounds of personal expenses in a business with a hundred thousand pound turnover will scrutinise every line carefully and is likely to challenge or discount a significant portion.
The discipline required is to include only add-backs you can evidence, justify, and defend under questioning. A conservative, well-documented SDE figure that survives due diligence intact is worth more than an optimistic one that is reduced during negotiation.
Poor documentation means that even legitimate add-backs cannot be verified from the records. Cash expenses without receipts, vehicle costs without a business-use log, and personal subscriptions bundled with legitimate business costs all create documentation problems.
The practical preparation steps are: identify every potential add-back, gather the supporting documentation for each one, and prepare a clear written schedule that shows the net profit per accounts, each add-back with its value and the supporting evidence, and the resulting SDE figure. This schedule should be reviewed with your accountant before it is shared with any buyer.
The role of a third year in SDE analysis
Buyers and their advisers will typically want to see three years of accounts. This is not arbitrary. Three years of data allows them to assess whether the SDE figure is representative of normal trading or whether it has been influenced by an exceptional year in either direction.
A single strong year after two weaker ones is less convincing than three consistent years. Three years of modest but stable performance is often more attractive to a cautious buyer than one exceptional year followed by two average ones.
The implication for sellers is clear. The best time to go to market is when your most recent three years show consistent or improving performance. If your trailing twelve months are your strongest period but the two prior years were weaker, you may benefit from a further twelve months of strong trading before going to market, because it will allow you to present a three-year picture that is genuinely representative of current performance rather than an anomaly.
SDE and business lending
Buyers who are financing part of the purchase through a business acquisition loan will need their lender to underwrite the SDE figure. UK lenders who provide finance for small business acquisitions typically apply their own assessment of SDE and will not simply accept the seller's calculation.
Understanding this matters for sellers because it means the SDE figure needs to survive not just buyer scrutiny but lender scrutiny. A lender will want to see the accounts, the management figures, and the add-back schedule, and they will apply their own adjustments. If the lender's view of SDE is materially lower than the seller's, the buyer's financing may fall short of the agreed purchase price, which can cause a deal to collapse or require renegotiation.
Sellers who prepare a clean, conservative, well-evidenced SDE figure are helping buyers secure the financing they need to complete the transaction. This is in the seller's interest.
Common mistakes in SDE calculation
The following are the mistakes most commonly made by sellers or their advisers when preparing an SDE figure for a health and beauty business.
Using turnover instead of profit as the starting point. SDE starts from net profit, not turnover. A calculation that starts from the wrong figure produces a meaningless result.
Including add-backs that cannot be evidenced. An add-back that cannot be supported from the records will be challenged and is likely to be removed entirely during buyer due diligence.
Ignoring non-recurring income. Sellers sometimes include income in the SDE period that was exceptional. A sophisticated buyer will identify this and reduce their SDE assessment accordingly, often creating a confrontational moment in the due diligence process that damages trust.
Using a cherry-picked measurement period. Selecting the most favourable twelve months rather than a representative trailing period will be identified by buyers who review multiple years of accounts. It reduces credibility without increasing the eventual price.
Failing to normalise for part-time owner involvement. If the owner works part-time and the business would require a full-time manager post-sale, the buyer will deduct a market-rate management salary from the SDE figure. A seller who does not account for this in their own calculation will be surprised when the buyer does.
Not having the calculation reviewed by an accountant. The SDE schedule is a financial document that will be scrutinised by the buyer's accountant. Having your own accountant review it before it is presented to buyers is a straightforward step that significantly reduces the risk of a challenge.
If you would like an experienced view on your SDE figure and what your business is likely to achieve in the current market, get in touch for a confidential, no-obligation conversation.
Key points
- SDE stands for Seller's Discretionary Earnings and is the standard valuation basis for owner-operated small businesses including salons and beauty businesses.
- SDE starts from net profit and adds back the owner's total compensation, depreciation, legitimate personal expenses, and one-off non-recurring costs.
- SDE is different from EBITDA. EBITDA is used for larger businesses with management in place. For owner-operated salons, SDE is the correct measure and typically produces a significantly higher figure.
- The multiple applied to SDE for most UK health and beauty businesses falls between one and a half and three and a half times. The multiple is determined by transfer risk.
- The key drivers of the multiple are owner dependency, lease security, staff stability, financial clarity, client retention evidence, and trading trends.
- Only include add-backs that you can evidence, justify, and defend under questioning from a buyer's accountant. A conservative, documented SDE that survives due diligence is worth more than an optimistic one that is reduced in negotiation.
- Buyers who are financing a purchase through a lender will need their lender to underwrite the SDE figure. A clean, well-evidenced SDE helps buyers secure the finance they need and reduces the risk of a deal collapsing at a late stage.
- The best preparation for an SDE-based sale is to work with your accountant to produce a clear, documented add-back schedule well in advance of going to market.
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