Casebook ~ Finance ~ Live project / valuation

What is a B2B SaaS startup worth before its Series B?

A fast-growing software company was preparing for its next funding round. The question was what its recurring revenue and retention could support under a range of outcomes.

Context Live project / valuation
My role [Valuation model & diligence]
Timeline [X weeks]
Result [Valuation range / decision supported]
The answer, up front

Value the business on durable growth — not ARR alone.

[$X–$Y] illustrative enterprise-value range
[X%] net revenue retention in the base case
[N] valuation methods triangulated
01 · Frame

Find the real question

Situation. The company has recurring subscription revenue, a growing customer base and a fundraise on the horizon. Headline ARR growth looks compelling.

Complication. Customer cohorts vary in retention and expansion, while sales efficiency and margin profile are still maturing. A single revenue multiple could obscure the quality and risk of future cash flows.

“What valuation range is supportable today, and which operating assumptions matter most to that range?”

A good answer had to show:
~Separate contracted recurring revenue from one-off and at-risk revenue.
~Use retention, growth efficiency and gross margin to judge revenue quality.
~Triangulate methods and show how the range moves under downside assumptions.
02 · Structure

Value the revenue, the growth engine and the risk

I built the valuation around three questions: how durable the revenue is, how efficiently it can grow, and what investors may reasonably pay for that profile.

What is the company worth today?
How durable is revenue?Cohort retention and expansion
Customer concentration
Contract and churn risk
Can growth scale efficiently?CAC payback and sales capacity
Gross margin trajectory
Burn and runway
What do methods imply?Public and transaction comps
Cash-flow scenarios
Funding and dilution context
Hypotheses I set out to test
H1Net revenue retention and gross-margin trend explain more value than headline ARR alone.
H2A cohort-informed forecast produces a more defensible DCF than a top-line extrapolation.
H3Public-company multiples need adjustment for growth, scale, liquidity and business-model differences.
03 · Analyse

Triangulate value and make the assumptions visible

3.1

Rebuild revenue quality

Reconciled reported ARR to contracted recurring revenue and separated new bookings, expansion, contraction and churn by cohort.

[Visual: ARR bridge and cohort retention curves]

Insight: [Cohort / segment] contributes the most durable growth; [risk item] needs a downside haircut.

3.2

Forecast the operating engine

Modelled customer adds, expansion, churn, pricing and sales capacity, then linked gross margin and hiring to the growth plan.

[Visual: growth efficiency and margin trajectory]

Insight: the base case depends most on [retention / hiring / CAC]; a slower path changes value by [X%].

3.3

Cross-check valuation methods

Applied a scenario DCF and relevant revenue or cash-flow multiples, normalising for growth, margin, scale and comparable-company fit.

[Visual: valuation range by method and scenario]

Insight: [Method] anchors the range; [assumption] explains most of the spread between downside and upside.

Triangulate the range, then stress the drivers

The valuation is a range rather than a point estimate. Replace each bracket with diligence-backed assumptions and show the sensitivity before using it in a negotiation.

Method / scenarioDownsideBaseUpside
Cohort-based DCF[$X][$X][$X]
ARR / revenue comparables[$X][$X][$X]
Growth efficiency check[Below bar][At bar][Above bar]
Key NRR assumption[X%][X%][X%]
Implied enterprise value[$X][$X][$X]
04 · Recommend

Anchor the raise on a range backed by operating proof

Use the triangulated base case as the negotiation anchor, with a clear downside and upside range. Tie the valuation narrative to cohort retention, efficient growth and a credible path to stronger margins; agree in advance which diligence findings would change the range.

Weeks 0–2ReconcileTie ARR, bookings and customer cohorts back to source systems and contracts.
Weeks 2–4TriangulateComplete DCF and comparable-company views; stress the few assumptions that drive value.
Weeks 4–6PrepareBuild the investor narrative, diligence pack and negotiation guardrails around the range.
Risks, and how to manage them
ARR quality is overstatedReconcile contracts, billing and churn; disclose non-recurring revenue separately.
Comps create false precisionUse a relevant peer set and explain growth, scale and margin adjustments.
Plan assumes growth at any costShow burn, runway and a credible efficiency path in each scenario.
05 · Looking back

What I would keep, and what I would change

What worked

[What improved confidence in the range, such as reconciling ARR to cohort-level evidence.]

What I would do differently

[What you would diligence sooner or build into the model earlier.]

Sample case page: replace bracketed values with verified project details before publishing.

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