Small business valuation methods: what each one is good for
Short answer
The main small business valuation methods are: a multiple of SDE or EBITDA based on comparable sales (market approach), capitalization of earnings and discounted cash flow (income approach), adjusted net assets or liquidation value (asset approach), and industry rules of thumb. Appraisers usually consider several and explain which they rely on.
For owner-operated businesses, SDE multiples from comparable sales dominate; asset methods set a floor; DCF matters more for larger or fast-changing businesses.
Every valuation method is a different route to the same destination: what a reasonable buyer would pay for this business's future cash flow. Knowing the routes helps you read an appraisal, challenge a broker's price and avoid being impressed by false precision.
The methods compared
| Method | Approach | How it works | Best for | Weak spot |
|---|---|---|---|---|
| Multiple of SDE | Market | SDE × multiple from comparable sales | Owner-operated Main Street businesses | Comparables vary; SDE quality |
| Multiple of EBITDA | Market | EBITDA × multiple | Larger businesses with management | Mixing SDE and EBITDA multiples |
| Multiple of revenue | Market | Revenue × multiple | Recurring-revenue businesses | Ignores margins |
| Capitalization of earnings | Income | Normalized earnings ÷ cap rate | Stable, predictable earnings | Sensitive to the cap rate |
| Discounted cash flow | Income | Forecast cash flows discounted to today | Growing or changing businesses | Forecasts are guesses |
| Adjusted net assets | Asset | Assets at fair value minus liabilities | Asset-heavy or low-profit | Misses goodwill |
| Rules of thumb | Market (informal) | Industry shortcut (e.g., × annual sales) | Quick screening | Ignores specifics |
How the approaches relate
A multiple and a capitalization rate are two views of the same idea: a multiple of 4 on earnings is roughly the same as capitalizing earnings at 25% (1 ÷ 4). DCF spells out the assumptions a multiple hides: growth, risk and how long the earnings last. Asset methods ask what you'd get if the earnings vanished. When methods disagree sharply, the disagreement usually points to a risk worth investigating.
What to do with this as a buyer
Use methods to understand a price, not to set one for your deal. If an asking price only makes sense with an optimistic DCF, or with a rule of thumb that ignores the lease or owner dependence, that's information. For formal values, credentialed appraisers do the work; in SBA deals the lender orders it. Read more in how small business valuation works, SDE multiples
Is there a small business valuation formula?
There's no single formula, but the most common one is simple: value = verified earnings (usually SDE or EBITDA) × a multiple that reflects risk. Others include value = normalized earnings ÷ capitalization rate (the same idea expressed as a rate), and value = assets at fair value − liabilities (a floor for asset-heavy or unprofitable businesses).
Each formula is only as good as its inputs. The earnings must be verified, and the multiple or rate has to come from comparable deals adjusted for this business's risks, which is what credentialed appraisers do.
People search for a formula because they want certainty. Valuation doesn't really offer that, but the common formulas are worth knowing, mostly so you can see what each one assumes.
The common formulas
| Formula | Inputs | What it hides |
|---|---|---|
| Value = SDE × multiple | Verified SDE; multiple from comparables | Whether SDE is real; owner dependence; what's included in price |
| Value = EBITDA × multiple | Normalized EBITDA; multiple | Manager cost assumptions; capex needs; working capital |
| Value = earnings ÷ cap rate | Normalized earnings; risk-based rate | Growth assumptions; sensitivity to the rate |
| Value = assets − liabilities | Fair values of assets and debts | Goodwill and earning power |
| Value = revenue × multiple | Revenue; multiple | Margins |
The multiple and the cap rate are the same thing
Illustrative arithmetic, not a valuation
Earnings of $200,000 at a cap rate of 25%: $200,000 ÷ 0.25 = $800,000. That's the same as 4 × $200,000. A cap rate of 33% is roughly a 3x multiple; 20% is 5x. Higher risk means a higher cap rate and a lower multiple.
Using a formula sensibly
- Get the earnings right first: rebuild SDE from tax returns and documented add-backs (SDE calculator).
- Understand where the seller's multiple came from, and whether it applied to SDE or EBITDA.
- Check whether the price works for financing and your return, not just the formula. See how to value a business to buy.
- For a defensible figure, rely on a credentialed appraiser.
The easiest way to value a business, and why it's only a starting point
The easiest way to value a business is a quick earnings multiple: take the seller's discretionary earnings and multiply by a typical multiple for similar businesses, or use an industry rule of thumb such as a multiple of annual sales. That's fine for screening listings in minutes.
It isn't fine for setting a price, because it assumes the earnings are real and the business is typical. Before you offer, verify the earnings and look at the specific risks that a shortcut ignores.
Easy valuation methods are screening tools. Used that way, they save you time. Used as pricing tools, they cost you money.
Two quick methods
Quick earnings multiple
Listed "cash flow" (usually SDE) × a multiple you've seen for similar businesses. Takes a minute. Tells you whether the asking price is in a sensible universe.
Industry rule of thumb
Often a multiple of sales or earnings, sometimes plus inventory. Common among brokers in some industries. Ignores the business's margins and risks.
A five-minute screen
- Asking price ÷ listed cash flow. Is it wildly out of line with similar listings?
- Is "cash flow" SDE or EBITDA? Is inventory included?
- Does the business depend on the owner?
- Is revenue trending up, flat or down over three years?
- Does the lease run long enough?
If it passes, request financials. If not, move on. More in evaluating a business for sale.
Why shortcuts fail for pricing
Illustrative example, not a real business
A listing shows $240,000 of cash flow. A quick 3x multiple suggests $720,000. Then diligence shows $45,000 of add-backs that don't hold up, and the lease has 18 months left. Verified SDE is $195,000, and the lease risk would push most buyers to the low end of any range. The shortcut was off on both inputs at once.
Use shortcuts to decide where to spend your time. Use verified earnings and a proper analysis to decide what to pay. See how small business valuation works.
Discounted cash flow valuation for a small business, in plain English
A discounted cash flow (DCF) valuation forecasts the cash a business will generate in future years and converts it into today's money using a discount rate that reflects risk. It's the most theoretically complete method, because it spells out growth, margins, reinvestment and risk.
For small businesses it's also fragile: small changes in the forecast or discount rate move the answer a lot, and forecasts for owner-run businesses are hard to defend. Appraisers use it mainly for larger or changing businesses, alongside market methods.
A DCF asks the question every buyer is really asking: how much is the future cash worth to me today, given how risky it is? It just asks it with more arithmetic.
A simple worked example
Illustrative arithmetic, not a valuation
Suppose a business is expected to produce $100,000 of free cash flow next year, growing 3% a year, and you require a 20% return. A simple shortcut for a steadily growing stream is: value ≈ next year's cash flow ÷ (discount rate − growth rate) = $100,000 ÷ (0.20 − 0.03) ≈ $588,000.
Change the discount rate to 25%: $100,000 ÷ 0.22 ≈ $455,000. Change growth to 0% at 20%: $100,000 ÷ 0.20 = $500,000. Small input changes, big output changes.
What a fuller DCF includes
- A forecast of revenue, margins, taxes, capex and working capital for several years.
- Free cash flow each year.
- A discount rate reflecting the risk of this specific small business.
- A terminal value for the years after the forecast.
- The sum of all of it, discounted to today.
How buyers can use it
Turn it around: given the asking price, what growth and risk do you have to assume for the price to make sense? If the answer requires growth the business has never shown, the price is pricing in your future work. Pair that with the financing test in how to value a business to buy, and keep in mind that SBA lenders size loans on historical earnings, not projections.
Frequently asked questions
What is the most common small business valuation method?
A multiple of seller's discretionary earnings (for owner-operated businesses) or EBITDA (for larger ones), derived from comparable transactions.
What is capitalization of earnings?
Dividing a single normalized earnings figure by a capitalization rate that reflects risk and growth. It suits stable businesses with predictable earnings.
When is an asset-based valuation used?
When a business earns little relative to its assets, is being liquidated, or is asset-heavy (equipment, real estate, inventory). It often sets a floor on value.
Are industry rules of thumb reliable?
They're quick screens, not valuations. They ignore the specific risks of the business in front of you.
What is the formula for valuing a small business?
Most often: earnings × multiple. For owner-run businesses the earnings figure is SDE; for larger ones, EBITDA. The multiple comes from comparable sales and the business's specific risks.
How does the capitalization formula relate to a multiple?
They're the same idea. Value = earnings ÷ cap rate, and a multiple is 1 ÷ cap rate. A 25% cap rate equals a 4x multiple.
Sources
Related guides
General information, not legal, tax, financial or investment advice. Rules and lender practices change; check the linked sources and talk to your attorney, CPA and lender about your deal. Examples with named numbers are illustrations, not real businesses. OKtoBuy's Deal Check does not value businesses or give price opinions.