Understanding EPC: The Metric Every Publisher Should Track

Earnings per click - EPC - is the average revenue generated for every click you send to an advertiser. It is calculated simply: total earnings divided by total clicks over a given period. But behind that simple formula lies a wealth of insight about the health and direction of your affiliate programme.

Why EPC matters more than commission rate

Publishers often chase the highest commission rates. But a high commission rate on a low-converting offer will produce a lower EPC than a moderate commission rate on a well-converting one. EPC is the number that actually tells you how much revenue a traffic source is generating - regardless of how the commission is structured.

Example

• Offer A: $65 commission, 1% conversion → EPC = $0.65
• Offer B: $40 commission, 2.5% conversion → EPC = $1.00
• Offer B generates about 54% more revenue per click despite the lower commission (illustrative calculation, not a market benchmark).

What drives EPC up or down

EPC is a product of two variables: commission rate and conversion rate. To improve EPC, you need to improve at least one of them without meaningfully degrading the other. In practice, this usually means improving the quality of traffic you send to an offer, improving the match between your audience's intent and the offer itself, or negotiating better commission rates based on demonstrated conversion quality.

How to benchmark your EPC

EPC varies by vertical, offer, market, period and traffic quality. There is no universal finance range or cross-industry ranking. Compare like-for-like offers and traffic sources over the same period; ask your account manager for current network benchmarks together with their sample and calculation method.

"If you only track one affiliate metric, track EPC. It tells you more about the health of your programme than any other single number."