Software and SaaS businesses sit at the top of the multiple range, and for a clear reason: recurring revenue and high gross margins make their earnings unusually durable and scalable. A dollar of subscription revenue that renews year after year is worth far more than a dollar that has to be re-won — and buyers price that durability accordingly.
But software is also the one sector where the methodology itself shifts depending on scale. This guide walks through how buyers frame a software valuation, the metrics that set the band, why some businesses are valued on revenue rather than profit, and a worked example.
How do buyers value a software business?
For an established, profitable software business with a real management team, a buyer normalizes EBITDA and applies a multiple — the same framework used across most sectors, just anchored to software's higher range. The premium reflects recurring revenue, high gross margins, and the low incremental cost of serving the next customer.
The twist comes below scale, and for high-growth businesses: there, buyers frequently value on revenue instead. More on that below. Either way, the output is a range, not a point — the final number reflects diligence, deal structure, and how strategically a specific buyer values the product.
Why is net revenue retention the dominant driver?
A caution before the metric itself: recurring-revenue figures are defined by the company reporting them, not by an accounting standard. Public filers presenting comparable measures must reconcile them to GAAP and may not give them greater prominence, under the SEC guidance on non-GAAP financial measures, and a buyer will apply the same scepticism to a private company defining its own retention numbers.
For a subscription business, the single most important number is whether revenue from the existing customer base grows or shrinks before any new sales are added. That is net revenue retention.
- Above 100%: the business compounds on its own through upsells, expansion, and low churn. New sales are growth on top of growth. Buyers reward this heavily.
- Below 100%: the business is leaking revenue and has to run hard just to stay flat. Every new customer is partly replacing one that left.
Retention tells a buyer whether they are acquiring a compounding asset or a leaky bucket, which is why it moves the multiple more than almost any other metric.
How do margin and the rule of 40 set the band?
Gross margin sets the ceiling on how scalable the model really is — high margins mean most of each new dollar drops toward profit. On top of that, buyers apply the rule of 40: the idea that a software business's growth rate plus its profit margin should clear roughly forty.
It is a fast test for whether growth is being bought at a sustainable cost. A business that grows efficiently — strong growth without burning disproportionate cash — sits at the top of the band. One that posts impressive growth only by spending far ahead of its margins sits lower, because that growth is expensive and less durable.
EBITDA or revenue — which applies to you?
This is the wrinkle that makes software different from every other sector here.
That scale threshold is not arbitrary, and it maps onto how transaction data is segmented generally: the IBBA and M&A Source Market Pulse survey reports Main Street businesses valued at $0 to $2 million separately from the lower middle market at $2 million to $50 million, because buyer behaviour genuinely differs across that line.
Below a certain scale, and especially for high-growth businesses deliberately reinvesting ahead of profit, buyers often value on revenue rather than EBITDA — because the earnings line understates the asset. A business spending hard to capture a growing market may show thin or negative EBITDA while building something very valuable.
Our calculator uses an EBITDA-and-multiples framework throughout. If your business is being valued on revenue in the market, treat the EBITDA-based estimate as a conservative floor and interpret it accordingly. As a software business matures and prioritizes profitability, valuation naturally shifts back toward EBITDA.
A worked example: same revenue, different value
Picture two SaaS businesses with the same revenue:
- Company A retains and expands its existing customers (net revenue retention comfortably above 100%), holds high gross margins, and grows efficiently enough to clear the rule of 40. A buyer sees a compounding, durable asset and prices it toward the top of the software range.
- Company B posts the same revenue but loses as many customers as it adds, runs thinner margins, and only grows by spending well ahead of profit. A buyer sees a leaky bucket propped up by sales spend and prices it well down the range — or passes.
Same revenue, very different value. Retention, margin, and growth efficiency — not the top-line number — decide where a software business lands.
What moves a software business up the range?
- Net revenue retention above 100%
- High gross margins and efficient, sustainable growth
- Low customer concentration and contractual, multi-year revenue
- A product that doesn't depend on the founder to sell or support
What this means for your estimate
Our valuation calculator starts from a current, market-informed range for software and SaaS and adjusts for your earnings, growth, and recurring-revenue mix — returning a range and midpoint rather than a single number. For the bigger picture of why sectors differ in the first place, see how buyers set multiples by industry.
For software especially, treat the estimate as a directional starting point, not a market-clearing price — and not a formal appraisal.