Cost Per Acquisition (CPA)

The aggregate cost to acquire one paying customer on a specific campaign or channel. In ecommerce, this is often synonymous with Cost Per Sale.

How to Calculate CPA

CPA = Total Ad Spend / Total Conversions

CPA vs. CAC

While often used interchangeably, CPA usually refers to platform-specific performance (e.g., "My Facebook CPA is $25"), whereas CAC refers to the holistic business cost, often including tools, agency fees, and salaries.

Target CPA (tCPA)

Ad platforms like Google and Meta use "Target CPA" bidding strategies. You tell the algorithm "I am willing to pay $30 for a sale," and it will bid on impressions automatically to achieve that average cost.

How to Lower CPA

Since CPA = (CPM / 1000) / (CTR * CVR), you can lower CPA by:

• Increasing CTR: Better ad creative lowers your cost per click.
• Increasing CVR: Better landing pages mean you need fewer clicks to get a sale.
• Broadening Targeting: Giving the algorithm more room to find cheaper pockets of inventory.

Related Benchmarks

CPA Benchmarks See average CPA by industry What is CVR? Conversion Rate definition

Frequently Asked Questions

By Benchmarketing Research Team Reviewed by Performance Marketing Editorial Reviewed March 2026 · observations Q1 2023 – Q4 2024