E-commerce CAC inflation benchmarks show whether it is becoming more expensive to acquire each new customer. CAC pressure can come from higher paid media prices, weaker conversion rates, channel saturation, more aggressive competitors, or a shift toward retail media and creator channels that are harder to attribute cleanly.
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This page belongs to the Customer Retention silo. For nearby metrics, use CAC benchmarks, LTV to CAC benchmarks, MER benchmarks, and ad cost benchmarks.
Benchmark snapshot
Key numbers and signals
Use these as directional benchmarks, then check source scope before citing a number as e-commerce-specific.
Meta average ad price signal
Meta reported average price per ad increased 9% year over year for full-year 2025, a direct paid-social cost signal.
U.S. retail media revenue
IAB/PwC reported retail media network advertising revenues reached $53.7B in 2024, up 23% year over year.
U.S. creator ad spend forecast
IAB projected U.S. creator economy ad spend would reach $37B in 2025, up 26% year over year.
| Benchmark | Reference point | How to read it |
|---|---|---|
| Paid social CAC pressure | Meta average price per ad +9% YoY in full-year 2025 | If conversion rate does not improve, higher ad price can translate into higher CAC. |
| Retail media competition | $53.7B U.S. retail media revenue in 2024 | More retail media spend can raise the cost of visibility on marketplaces and retail platforms. |
| Creator acquisition budgets | $37B projected U.S. creator ad spend in 2025 | Creator budgets are no longer experimental and can become part of acquisition cost. |
| Search cost pressure | $5.26 average Google Ads CPC reference in 2025 | Higher paid-search costs pressure CAC in high-intent product categories. |
| Efficiency benchmark | MER should be tracked beside CAC | CAC inflation matters most when blended revenue-to-marketing-spend efficiency weakens. |
Benchmarks on this page combine e-commerce-specific data where available with broader digital advertising and retail media data when the source is widely used for e-commerce planning. Always label the metric scope when citing it.
Interpretation
What makes CAC inflation different from ad cost inflation
Ad costs can rise while CAC stays stable if conversion, AOV, retention or brand demand improve. CAC inflation happens when the cost to create a new customer rises faster than the customer economics that support it.
Media cost inflation
When CPC, CPM or platform ad price increases, CAC can rise even if the funnel is unchanged. This is the simplest and most visible driver.
Conversion-rate compression
If landing pages, product pages or checkout perform worse, the same ad cost produces fewer first orders and CAC rises.
Channel mix expansion
Brands often add retail media, creator, affiliate or marketplace ads when core channels saturate. This can improve reach but complicate CAC measurement.
LTV mismatch
CAC is only sustainable when it fits gross margin and repeat purchase behavior. A subscription brand can tolerate a CAC that would break a one-time purchase model.
Application
How to use CAC inflation benchmarks
- Track CAC by new customer, not total orders. Do not let repeat purchases hide rising acquisition cost for first-time customers.
- Pair CAC with LTV:CAC. A higher CAC may be acceptable if lifetime value and retention are also improving.
- Segment by channel and blended business. Use both channel CAC and blended CAC because platform-level CAC can look good while total business efficiency weakens.
- Separate paid acquisition from demand capture. Retail media and branded search can capture existing demand, so CAC should be read against incrementality and new-customer rate.
Methodology
How this benchmark should be read
- CAC equals acquisition spend divided by the number of new customers acquired during the same period.
- This page treats media-cost signals as CAC-pressure inputs, not as direct CAC values unless a source specifically reports CAC.
- Use CAC benchmarks together with margin, repeat purchase, retention, and payback period; otherwise the benchmark can be misleading.
Sources
Sources used for this dataset
Cite this page
How to cite this dataset
E-commerce CAC Inflation Benchmarks. Best For Ecommerce. Updated 2026-05-31. Available at: https://bestforecommerce.com/ecommerce-statistics/customer-retention/ecommerce-cac-inflation-benchmarks/