Strategy
Benchmarking Your SaaS CAC | What's Normal?
Customer acquisition cost only means something next to lifetime value and payback. How to calculate SaaS CAC properly, what the ratios look like, and where paid channels fit.
BenchMarketing editorial team Updated October 2, 2026 3 min readShare
Customer acquisition cost is what you spend to win one new customer. It is easy to calculate badly, and a CAC on its own tells you very little. A $2,000 CAC is a bargain for a product customers pay $1,000 a month for and a disaster for one that costs $20.
Calculate it fully
CAC = total sales and marketing cost in a period ÷ new customers won in that period.
"Total" matters. Include ad spend, but also sales and marketing salaries, tools, agencies and content. Many teams quote a paid CAC (ad spend only) because it looks better. Keep both, label them, and never compare one company's paid CAC with another's fully loaded figure.
Judge CAC against lifetime value
The ratio of lifetime value to CAC is the more useful number. In the BenchMarketing dataset the median LTV:CAC across industries is 3.0x, with the middle half of companies between 1.8x to 5.0x.
For SaaS the median is 3.5x, on an average lifetime value of $8,200 and CAC of $2,340.
| Industry | Median LTV:CAC | Average LTV | Average CAC |
|---|---|---|---|
| SaaS | 3.5x | $8,200 | $2,340 |
| Ecommerce | 2.8x | $620 | $221 |
| Financial Services | 4.2x | $5,600 | $1,333 |
| Healthcare | 3.8x | $3,200 | $842 |
| Legal | 3.2x | $4,800 | $1,500 |
| Home Services | 3.6x | $1,800 | $500 |
| Real Estate | 2.5x | $12,000 | $4,800 |
| B2B Services | 4.0x | $18,500 | $4,625 |
A ratio under 1x means each customer costs more than they are worth. Around 3x is commonly treated as healthy for a growing SaaS company. Far above 5x can mean you are under-investing in growth.
Payback period
The ratio hides time. A 4x LTV:CAC that takes four years to pay back ties up cash a young company may not have. Payback period is the number of months of gross margin it takes to recover CAC:
Payback (months) = CAC ÷ (monthly revenue per customer × gross margin).Track it by acquisition channel. Self-serve signups from search often pay back in months; enterprise deals won through outbound and events can take more than a year and still be worth it.
Where paid channels fit
Paid search and LinkedIn are the usual paid channels for SaaS. The Google Ads median cost per conversion for SaaS is $137.21, and the LinkedIn median cost per lead for SaaS is $58.40. Those are costs per lead or signup, not per customer. Divide by your lead-to-customer rate to get a paid CAC: at $58.40 per lead and one customer in ten leads, paid CAC is ten times that.
Making CAC comparable
- Use the same period for costs and new customers, and allow for your sales cycle.
- Separate new-customer CAC from expansion revenue; upsells are cheaper and should not flatter acquisition.
- Split by segment. Small-business and enterprise customers have different CAC, LTV and payback, and a blended figure hides both.
Compare your ratios on the LTV:CAC benchmark page and the CAC benchmark page, or work out lifetime value with the LTV calculator.
About the figures
Benchmark figures in this article come from the BenchMarketing dataset and update when the benchmark pages do. Each benchmark page lists its sources and period; see our methodology.
See where you stand
Compare your own numbers with these benchmarks for your industry.
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