What counts as cost of revenue in SaaS?

Hosting and infrastructure, third-party services embedded in the product, support, and the portion of customer success required to keep customers running. Sales and marketing are not cost of revenue; onboarding usually is.

Why does gross margin matter for revenue operations?

Because LTV, payback period and every efficiency ratio should be computed on margin, not revenue. Using revenue overstates all of them, often by a wide margin in a service-heavy business.

Should customer success sit in cost of revenue?

The part required to keep customers working, yes. The part driving expansion is closer to a sales cost. If the team does both and you cannot separate them, say which convention you used — the choice moves the number materially.

What is a good SaaS gross margin?

Software businesses typically run high because delivery cost does not scale with revenue. A materially lower figure usually means the product needs human effort per customer, which is a scaling constraint rather than an accounting quirk.

Gross Margin

Revenue minus cost of goods sold, as a percentage of revenue. Whether the business model scales.

What it measures

Revenue less the cost of delivering it, as a percentage of revenue. In software the arithmetic is easy and the classification is where the judgement lives.

What belongs in cost of revenue

Classification, and why each is contested

Cost	Usually in?	The argument
Hosting and infrastructure	Yes	Directly consumed by delivering the product
Third-party services in the product	Yes	Passed through to the customer
Support	Yes	Required to keep customers running
Customer success	Partly	Retention portion yes; expansion portion is a sales cost
Onboarding and implementation	Usually	Required before the customer gets value
Sales and marketing	No	Cost of acquiring, not of delivering

Source: Conventions summarised here

Why this is a revenue operations problem, not only a finance one

LTV, CAC payback and every efficiency ratio should be computed on gross margin. If the classification is unstated or inconsistent, every one of those metrics is unreliable — and they are the metrics used to decide where to spend.

Using it

Agree the classification once, write it down, and keep it stable. Comparability over time matters more than picking the theoretically perfect boundary.
Compute margin per segment. A segment needing heavy implementation can be near-zero margin while the blended figure looks healthy.
Recompute after any pricing or packaging change, since both move the denominator without touching the cost base.
Feed the result into LTV and payback rather than using revenue there.

How to compute it for a software business

Decide what sits in cost of revenue and document it: hosting, third-party licences embedded in the product, support, and the delivery portion of customer success.
Treat professional services separately. Blending low-margin services into product margin produces a figure that describes neither.
Exclude sales and marketing. Those are operating costs, not cost of revenue, and including them turns gross margin into something closer to operating margin.
Check the treatment of customer success explicitly — it is the single most contested line, and where it lands moves the figure by several points.
Recompute after any material infrastructure change. Hosting costs move with architecture, and margin assumptions made two years ago frequently no longer hold.

Where it misleads

Gross margin is highly sensitive to where the customer success boundary is drawn, and that boundary is a judgement rather than a rule.
It is a period figure and can be flattered by deferring maintenance or under-supporting customers, both of which cost more later.
Comparisons across companies are frequently invalid because the cost-of-revenue definition varies so widely.
High gross margin says nothing about whether the business can acquire customers economically — that is a different question with a different metric.

RELATED TERMS

Burn Multiple

Net cash burned divided by net new ARR added — how much cash is consumed to produce a unit of recurring revenue.

CAC Payback Period

How long it takes for a customer's gross profit to repay the cost of acquiring them. The bridge between sales efficiency and cash flow.

LTV:CAC Ratio

Lifetime value divided by acquisition cost. Whether a customer returns more than they cost to win.

COMMON QUESTIONS

What counts as cost of revenue in SaaS?: Hosting and infrastructure, third-party services embedded in the product, support, and the portion of customer success required to keep customers running. Sales and marketing are not cost of revenue; onboarding usually is.
Why does gross margin matter for revenue operations?: Because LTV, payback period and every efficiency ratio should be computed on margin, not revenue. Using revenue overstates all of them, often by a wide margin in a service-heavy business.
Should customer success sit in cost of revenue?: The part required to keep customers working, yes. The part driving expansion is closer to a sales cost. If the team does both and you cannot separate them, say which convention you used — the choice moves the number materially.
What is a good SaaS gross margin?: Software businesses typically run high because delivery cost does not scale with revenue. A materially lower figure usually means the product needs human effort per customer, which is a scaling constraint rather than an accounting quirk.