How Small Business Valuation Works
Small business valuation is the process of determining what a business is worth on the open market. Buyers, sellers, and lenders all rely on valuation to set fair prices and make sound decisions. The most common approach for businesses under $5M in revenue is the SDE multiple method. It works by calculating the total cash flow available to a single owner-operator, then multiplying that figure by an industry-specific factor.
This method dominates small business transactions because it accounts for the way most owners run their companies. Owner-operators often blend personal and business expenses. They pay themselves varying salaries. SDE normalizes all of that into a single number that represents the true earning power of the business.
What Are SDE Multiples?
SDE stands for Seller's Discretionary Earnings. It equals net income plus the owner's salary plus add-backs. Add-backs include personal expenses, one-time costs, and discretionary spending that runs through the business. For a deeper breakdown, read our guide on understanding SDE.
Once you have the SDE figure, you multiply it by a multiple that reflects the risk and desirability of the business. Multiples typically range from 1.5x to 4.0x for most small businesses. SaaS companies and tech businesses can reach 6x to 8x or higher. Service businesses like restaurants, landscaping, and cleaning companies tend to fall between 1.5x and 2.5x.
These multiples vary significantly by industry. A laundromat trades at a different multiple than a dental practice, even at the same SDE level. For a full breakdown, see our valuation multiples by industry guide.
Factors That Affect Small Business Valuation
Several factors push a business valuation higher:
- Recurring revenue. Subscriptions, contracts, and repeat customers reduce risk and increase predictability.
- Low owner dependency. A business that runs without the owner being present every day is worth more than one that collapses without them.
- Growing revenue. Consistent year-over-year growth signals a healthy business with room to expand.
- Diverse customer base. No single customer should account for more than 10-15% of total revenue.
- Documented processes. SOPs, training manuals, and established workflows make the business transferable.
On the other side, several factors decrease what buyers are willing to pay:
- Declining revenue. Falling sales signal deeper problems and scare off buyers.
- High owner dependency. If the business cannot function without the current owner, the buyer is purchasing a job, not a business.
- Customer concentration. When one or two customers make up the majority of revenue, losing either one could sink the company.
- Thin margins. Low profit margins leave no room for error and make financing harder to secure.
SBA lenders pay close attention to valuation when deciding whether to approve acquisition loans. They want to see that the purchase price is justified by the business's earnings. If the asking price exceeds what standard multiples support, the loan gets denied. Buyers who understand valuation before approaching a lender save themselves months of wasted effort.
When to Use Different Valuation Methods
The SDE multiple method is the standard for most small business transactions, but it is not the only approach. There are three main valuation methods:
- Income-based (SDE or EBITDA multiples). Best for profitable, operating businesses. This is the method most buyers, brokers, and SBA lenders use for businesses under $5M.
- Asset-based. Adds up the fair market value of all tangible and intangible assets, then subtracts liabilities. This works for asset-heavy businesses like manufacturing, equipment rental, or real estate holding companies. It also serves as a floor value for any business.
- Market-based (comparable sales). Looks at what similar businesses have actually sold for. This approach works well when there are enough recent, comparable transactions in the same industry and region. The challenge is that small business sale data is often private and hard to find.
Most buyers use a combination of these methods. The income-based approach sets the primary valuation. The asset-based approach confirms a minimum value. And comparable sales data, when available, validates that the price is in line with what the market is actually paying.
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