Cost Per Acquisition (CPA)
Cost per acquisition explained. 2026 benchmarks: Google Search CPL $66.69, Meta e-commerce CPA $38.19, LinkedIn CPL ~$94.
The average cost to acquire one conversion — a sale, signup or qualified lead. The bottom-line efficiency metric most bidding strategies optimize toward.
Formula
Total Ad Spend ÷ Conversions
Benchmark range
Google Search CPL: $66.69 average (2026), $26.84 (Arts) to $131.63 (Legal). Meta e-commerce CPA: ~$38.19. LinkedIn CPL: ~$94 (premium B2B).
Why it matters
CPA ties spend directly to outcomes. Compare it against customer LTV — a healthy business keeps LTV well above CPA — rather than judging it in isolation.
2026 update
Google's average CPL fell in 2026 for the first time in five years, to $66.69, as conversion rates rose across 87% of industries. Meta held CPA nearly flat despite a 20% CPM increase, because the Andromeda delivery engine improved buyer-matching.
Where it applies
- Google Ads
- Meta Ads
- Microsoft Ads
- LinkedIn Ads
- TikTok Ads
- Amazon Ads