What's the overall direction of acquisition cost?
№ 165 · CAC blended trend
Definition
MetricBlended customer acquisition cost, total sales and marketing spend divided by all new customers
Unitcurrency per acquired customer, indexed or absolute
Single line: all S&M spend divided by all new customers. Smooths channel noise. Build from total marketing + sales spend divided by new customers per period. The single number boards focus on. Example: $42 blended to $58 (deteriorating, investigate channel mix).
- CAC
- Customer acquisition cost. Fully loaded sales and marketing spend in a period divided by new customers won in that period.
- S&M
- Sales and marketing. All go-to-market cost: salaries, commission, media spend and tooling.
Benchmarks
| Bottom 30% | Median | Top 30% |
|---|---|---|
| $2.82 per $1 of new ARR at the fourth quartile, roughly triple the top performers | $2.00 of S&M spend per $1 of new ARR in 2024, up 14% year on year; blended CAC up roughly 10% since 2022 | Blended CAC flat or falling year on year, with new CAC ratio at or below $1.30 of S&M per $1 of new ARR |
B2B SaaS, approx. 1,000 companies, 2024 full-year data reported in 2025, blended CAC defined as all sales and marketing cost including salary over all new customers acquired; consumer and ecommerce comparators use media-inclusive spend over new buyers · Blended CAC and the new CAC ratio are different metrics that answer the same question, and the ratio version is the better trend line because it normalizes for deal size drift. Any blended CAC series that mixes new and expansion customers will trend down for the wrong reason. The 40 to 60% inflation figure from Phoenix Strategy Group and the 222% eight-year surge attributed to SimplicityDX are aggregate claims from smaller panels and sit well above the roughly 10% since 2022 that Benchmarkit measures, so the wide numbers should be flagged, not averaged in.
Category split omitted: Blended CAC is only published split by ARR band or ACV in Benchmarkit; the second sources available for a category split are aggregators reusing the same panel, so the split is not independently corroborated.
When it looks bad
The blended line rises steadily while new customer count is flat, so the curve is being driven entirely by spend rather than by mix or deal size, and no single channel on the companion chart explains it.
Blended CAC $1,100 to $1,540 across four quarters, new customers 420 per quarter throughout, S&M spend up 40%, and the new CAC ratio moving from $1.90 to $2.70 per $1 of new ARR.
What to do about it
- Chart the new CAC ratio rather than absolute blended CAC as the headline; the ratio normalizes for ACV drift and the published distribution is tight enough to place yourself honestly, with median $2.00 and fourth quartile $2.82 (Benchmarkit 2025).
- Decompose the rise into price, volume and mix before acting; if blended CAC rose because a higher-ACV segment now takes a larger share of new logos, the correct read is that payback should be checked per segment and the blended line is not the problem.
- Hold headcount flat for one full quarter and let media flex, since most of the CAC denominator is salary rather than media in B2B SaaS; this isolates whether the inflation is auction-driven or structural without cutting demand generation.
- For DTC, replace blended CAC with spend over revenue as the board metric; the Triple Whale customer median MER was 41% in 2025, which is a P&L-legible number, whereas blended CAC moves with AOV and cannot be compared across quarters when product mix shifts.
Sources
- Benchmarkit Median new CAC ratio $2.00 of S&M spend per $1 of new ARR in 2024, up 14% YoY, fourth quartile $2.82; CAC payback highly correlated to ACV band benchmarkit.ai ↗
- Aleph x Benchmarkit Median CAC payback 16 months, top quartile 6 months or fewer, bottom quartile 24 months or more, worst case in sample 48 months getaleph.com ↗
- CO Consulting Median CAC payback for private SaaS reported near 20 months in the 2024 KeyBanc Capital Markets and Sapphire Ventures SaaS Survey; First Page Sage LTV:CAC by industry runs 2.5:1 to 5:1 christopholivierconsulting.com ↗
- Phoenix Strategy Group Paid search CAC $802 B2B, Facebook $230, LinkedIn $982, organic search $290 to $942, referral $150 for B2B SaaS, outbound sales $1,980; CAC up 40 to 60% between 2023 and 2025 phoenixstrategy.group ↗
- The Zulu Method Private B2B SaaS spends about 8% of ARR on marketing at the median per SaaS Capital 2026; median company spends $2.00 in S&M per $1 of new ARR thezulumethod.com ↗
- The SaaS Library Median private B2B SaaS LTV:CAC 3.6:1 per Benchmarkit 2025, above the commonly cited 3:1 floor thesaaslibrary.com ↗
- Optifai Median B2B SaaS LTV:CAC 3.2:1; LTV by segment SMB $15K to $40K, mid-market $80K to $200K, enterprise $300K to $1M+ optif.ai ↗
- Triple Whale Median MER for Triple Whale customers in 2025 was 41%, expressed as ad spend over total revenue triplewhale.com ↗
- First Page Sage Splits every industry into organic CAC (SEO and organic social) and inorganic CAC (PPC/SEM and paid social); paid exceeds organic in 26 of 27 listed industries firstpagesage.com ↗