What is EPC (Earnings Per Click) and How to Use It to Pick Better Programs

The One Number That Tells You Everything

Every affiliate marketer tracks clicks. Fewer track earnings. Almost none track both together — and that's where the money is.

EPC (Earnings Per Click) is simply your total earnings divided by your total clicks for a given link or program. It tells you, on average, how much you earn every time someone clicks your referral link.

EPC = Total Earnings ÷ Total Clicks

If you earned $120 from 400 clicks, your EPC is $0.30. That means every click through your link is worth 30 cents to you.

Why EPC Beats Every Other Metric

Most affiliate marketers obsess over commission rates. "Program A pays 30%! Program B only pays 15%!" But commission rate tells you almost nothing without knowing conversion rate.

Consider this comparison:

Program B has half the commission rate but three times the EPC. The higher conversion rate (2.4% vs 0.4%) completely overwhelms the lower commission percentage.

This is why EPC is the metric that cuts through the noise. It collapses commission rate, conversion rate, and average order value into a single comparable number.

How to Calculate Your EPC Accurately

Manual calculation is annoying and error-prone. But the formula is simple:

1. Pick a time period (last 30 days works well)
2. Sum all earnings from a specific link or program
3. Count all clicks through that link in the same period
4. Divide earnings by clicks

The gotcha: match the time window carefully. If a click happens on day 28 but the commission posts on day 32 (after a 3-day cookie window), you'll undercount earnings for the period. For most programs, using a 60-day rolling window smooths this out.

Using EPC to Make Better Decisions

Compare Programs on Equal Terms

The moment you have EPC for multiple programs, you have a leaderboard. Sort by EPC descending. Your top earner-per-click deserves more promotion, more link placements, more content.

Diagnose Underperforming Links

Low EPC on a specific link (but high EPC on others for the same program) often means: - The traffic source doesn't match the product (e.g. crypto exchange link shared in a personal finance subreddit) - The landing page isn't mobile-optimised and your traffic is mobile - The link placement is getting low-intent clicks (footer vs in-content)

Set a Minimum EPC Threshold

Once you know your average EPC, you can set a floor. Any link or program consistently below $0.10 EPC (for example) gets deprioritised or cut — freeing your time and audience trust for higher-value promotions.

Key Takeaways

• EPC = Earnings ÷ Clicks — the single number that makes programs comparable
• A high commission rate with a terrible conversion rate produces a terrible EPC
• EPC lets you rank your programs and cut the underperformers
• Use a 60-day rolling window to avoid commission-delay distortion
• Track EPC per link, not just per program — the same program can have very different EPC across traffic sources

Frequently Asked Questions

What's a good EPC for affiliate marketing? It varies widely by niche. In crypto affiliate programs, EPCs of $0.50–$5.00 are common because average order values are high. In lower-ticket niches like software tools, $0.10–$0.50 is typical. Compare your EPC to itself over time — improvement is the goal.

Should I calculate EPC per link or per program? Both. Per-program EPC tells you which programs are worth promoting. Per-link EPC tells you which traffic sources and content types are most effective. Both numbers together give you a complete picture.

How often should I check EPC? Weekly is enough for most. Daily checking on a new link or campaign makes sense — you want to catch a broken link or terrible conversion rate before you send a lot of traffic. After 30 days of data, monthly reviews are fine.

Does EPC account for cookie windows? Not automatically. If your program has a 30-day cookie, a click today might generate a commission 29 days from now. This is why using a longer time window (60–90 days) gives more accurate EPC figures than looking at just the last 7 days.

Can I track EPC without a dedicated tool? Yes, manually in a spreadsheet. But you lose the per-link granularity unless you create separate tracking parameters for each link — which is exactly what a tracking tool automates for you.