Fully-loaded customer acquisition cost includes every expense that goes into winning a customer: salaries, commissions, tooling, and overhead, not just ad spend. Most reported CAC figures leave the bulk of these out. A CAC that counts only media spend can be less than a third of the real number, and every ratio built on the lower figure is off by the same multiple.
Key takeaways
- Fully-loaded CAC includes S&M salaries, commissions, tooling, and allocated overhead, not only ad spend.
- A partial CAC understates the real figure, which inflates LTV:CAC and makes acquisition look more profitable than it is.
- 2026 B2B SaaS average CAC: roughly $239 per customer at the low end, $1,200 to $2,000 at scale stage, up ~14% year over year on rising competition (userpilot 2026, improvado 2026).
What does fully-loaded CAC actually include?
CAC = Total Sales & Marketing Cost / Number of New Customers
Usually counted: ad and media spend. Frequently or usually left out, and this is where understatement happens:
- Marketing salaries (frequently missed)
- SDR and sales salaries (frequently missed)
- Sales commissions (frequently missed)
- Marketing and sales tooling (frequently missed)
- Events and content production (sometimes missed)
- Allocated overhead (usually missed)
Worked example: a company spending $150K a month on S&M that acquires 15 customers has a fully-loaded CAC of $10,000. If it counts only its $40K media spend, it reports $2,667, less than a third of the real cost. A company with a true LTV:CAC of 5.76:1 on that $10,000 reports 21:1 on the partial number. The CLV did not change. Only the honesty of the CAC did.
Why does understated CAC distort everything downstream?
Understated CAC distorts the business because CAC is the denominator of the metrics that drive spending decisions. An artificially low CAC inflates LTV:CAC and shortens apparent payback.
scaleon sees both sides of this in project work. In a CAC rebuild for a digital subscription business, acquisition cost ranged from around £10 on the cheapest channel (website) to £144 on the most expensive (influencer), a 14x spread that a single blended CAC would have flattened into a meaningless average. Channel-level CAC is one of the most immediately useful cuts you can make.
In a separate model for a digital pet health platform, scaleon split marketing spend explicitly between new-customer acquisition and existing-customer retention. Folding retention cost into the CAC denominator inflates apparent efficiency and disguises the actual cost of winning a customer, a structural error that compounds into LTV:CAC and payback.
What is a reasonable CAC benchmark?
The honest answer is that benchmarks vary so widely by model and channel that your own fully-loaded number matters more than any external one. First Page Sage's analysis puts the average CAC around $239 for B2B SaaS industries, while at scale stage CAC averages $1,200 to $2,000 per customer and rose 14% year over year on rising competition (userpilot 2026, improvado 2026).
What matters is not hitting a benchmark CAC but maintaining a healthy ratio of CLV to fully-loaded CAC.
Frequently asked questions
What is the difference between CAC and fully-loaded CAC?
Basic CAC often counts only direct media or advertising spend. Fully-loaded CAC includes all sales and marketing costs: salaries, commissions, tooling, events, and allocated overhead. Fully-loaded CAC is usually far higher and is the only version safe to use in an LTV:CAC ratio.
What costs are most often left out of CAC?
The most commonly omitted costs are sales and marketing salaries, sales commissions, and software tooling, followed by allocated overhead. These are often the largest components, so leaving them out can understate true CAC by more than half.
How does understated CAC affect LTV:CAC?
It inflates the ratio. Because CAC is the denominator, a partial CAC makes LTV:CAC look much stronger than reality. A business with a true 3:1 ratio can report 6:1 or higher on a media-only CAC.
What is the average CAC for B2B SaaS in 2026?
Estimates range from roughly $239 across a broad set of B2B SaaS industries to $1,200 to $2,000 per customer at scale stage, up about 14% year over year. Your own fully-loaded CAC is more useful than any average.
What to do with your CAC number
Rebuild your CAC from the full cost base before trusting any ratio that uses it. Salaries, commissions, tooling, overhead, all in. Then recompute LTV:CAC and payback on the honest number. The 2026 B2B SaaS median payback is 15 to 16 months; top-quartile operators hold under 12 months (Benchmarkit 2025). The result is usually more useful for decisions than what was reported before, even when it is lower.
scaleon helps digital companies build unit economics that survive scrutiny. If your CAC has never been fully loaded, that is typically where the reported picture diverges most from reality.
