What Is EPC in Affiliate Marketing? (And Why the Network's Figure Misleads)

What is EPC in affiliate marketing? A plain-English definition

EPC in affiliate marketing stands for earnings per click: the average commission you earn each time someone clicks your affiliate link. You work it out by dividing your total approved commissions by your total clicks. It is a ratio built from your own numbers, not a rate that a network pays you for each click.

The formula is short enough to keep on a sticky note:

EPC = total approved commissions ÷ total clicks EPC per 100 clicks = EPC × 100

Some dashboards and program listings show EPC per single click (a small decimal) and others show earnings per hundred clicks (a rounder-looking number). Before you compare two EPCs, check which convention each one uses — two figures that look wildly different can be the same result written two ways.

EPC does one job well: comparing how different pages, keywords or traffic sources perform for you over the same period. It is a diagnostic, not a payout. If you have not made a commission yet your EPC is zero, and that is a normal starting point rather than proof that affiliate marketing does not work. If the term is new to you, our plain-English affiliate marketing glossary puts EPC beside the other terms you will meet in the first month.

Ready to use your own records? The affiliate EPC calculation guide and copyable worksheet walk through matching clicks with cleared commissions for the same period. Use this page for the meaning of the metric, then use that worksheet for your calculation.

Awin defines EPC using commissions and clicks from the same time period. This guide uses approved commissions for its own worksheet; check whether your network includes other statuses before comparing its reported EPC.^[3]

Why the EPC a network publishes is not your EPC

A program listing may show an aggregate EPC rather than your personal result. Check whose clicks are included, which commission statuses count, the date range and whether it is per click or per hundred clicks. Different reporting rules can make two figures incomparable. A historical ratio does not promise what you will earn.

Between those two numbers sit several things that are yours alone: how warm your traffic is, what country and device people use, how well your page matches the query, how long the cookie lasts, and which commission types the program offers. A reader who arrives from a review written for search intent that matches what they actually wanted behaves differently from one who lands on a thin page by accident.

An average also hides its spread. If a handful of large affiliates send most of the clicks, the published EPC reflects their audience far more than a beginner's. And small samples swing wildly: twenty clicks with one unlucky refund can move an individual's EPC by more than a hundred clicks from someone else.

How to calculate your own EPC in four steps

1. Fix the window. Use one week or one calendar month and do not compare a four-day stretch with a thirty-day one. Write the dates down.
2. Count clicks on your affiliate link. That is the network's click report or your own tracker, not your page views. Page views include people who never clicked.
3. Count approved commissions only. Pending and estimated amounts are not money yet — our explainer on pending, approved, reversed and paid commissions shows why the difference can be large.
4. Divide and label. Record the result with its period, such as “March, week two”, so future-you knows what is being compared.

Template: weekly EPC tracker. Copy these columns into any spreadsheet and add one row per week. The first row is an illustrative example with the arithmetic rounded — delete it before you start.

Six columns is enough. The “what changed” column is the one that turns a number into a decision, because it reminds you which edit, post or email produced the shift.

Illustrative example: 640 clicks and eight approved sales

This is an illustrative example only — it is arithmetic you can copy, not typical earnings for anyone.

Suppose one of your pages sent 640 clicks to an affiliate link in thirty days. Eight sales were approved, and the average approved commission was $12.40.

• Commission total: 8 × $12.40 = $99.20
• EPC: $99.20 ÷ 640 = $0.155, or about 15.5 cents per click
• EPC per 100 clicks: $15.50
• Conversion rate: 8 ÷ 640 = 1.25%

Now suppose the program listing had shown a network EPC of $0.62 for the same period. Your figure is roughly a quarter of it, and nobody lied. The network is averaging traffic from affiliates with different audiences; you are measuring one page and one month. That gap is the whole reason to calculate your own number. Our affiliate commission calculator works out your own earnings per click and net commission per sale from your clicks, conversion rate and refund rate.

Reversals matter too. If three of those eight sales were later reversed, the maths becomes 5 × $12.40 = $62.00, and $62.00 ÷ 640 = about $0.097 per click. Same clicks, same page, a third of the EPC gone. This is why the approved column exists in the tracker above and why cookie duration and attribution windows are worth understanding before you set expectations.

When you see a gap like that, the next step is not to buy a new tool — it's to track your own clicks. Get the free affiliate marketing checklist to set up tagging and recording in one sitting.

Track the clicks properly or your EPC is fiction

Count clicks at the link, not at the page

Your analytics tells you how many people loaded your page. Your network dashboard tells you how many clicked through to the merchant. Those are different numbers, and only the second belongs in the bottom half of the EPC fraction. Where a network supports sub-IDs, use them so each page, post or email carries its own label.

Tag traffic so you know which page earned the click

Google Analytics' URL builder lets you append utm_source, utm_medium and utm_campaign to a destination URL so you can see which campaigns refer traffic, and the values are case sensitive — utm_source=blog and utm_source=Blog are treated as different entries ^[1]. Keeping one consistent, lowercase naming convention stops a single campaign splitting into several rows in your reports ^[1].

YOUR-AFFILIATE-URL?utm_source=blog&utm_medium=referral&utm_campaign=epc-post

Our walkthrough on UTM tags and sub-IDs for affiliate links shows how to keep the naming consistent across every page you publish.

Mark affiliate links properly

Google asks sites to mark links that are advertisements or paid placements with rel=“sponsored” ^[2]. That does not change your EPC, but it keeps your links honest for search engines and sits alongside the affiliate disclosure you choose to publish. The details are in rel=“sponsored”, nofollow and link cloaking.

EPC vs CPC, EPL and conversion rate: which number answers which question

EPC is one of several ratios, and mixing them up is the second most common source of confusion after the network-versus-you problem.

Three of these are linked by one piece of arithmetic:

EPC = commission per conversion × conversion rate

Check it with the earlier illustrative numbers: $12.40 × 1.25% = $0.155. Because EPC sits downstream of both, a weak EPC tells you where to look next. Low conversion rate with a decent commission means the page or the offer fit needs work. Decent conversion rate with a small commission means the offer may simply pay less per sale — see affiliate commission types explained for the difference between flat-fee and percentage models.

Using EPC to judge a program without being fooled

EPC is a result, not a reason to join. Six things tell you more about a program before you send a single click:

• Commission type and rate. A flat fee and a percentage of a large order can produce very different EPCs from identical traffic.
• Attribution window. Short cookie lives cut commissions that arrive late in a buyer's research.
• Approval and reversal policy. Generous reversal rules quietly shrink the top half of your fraction.
• Readable terms. Our list of clauses to read in an affiliate program's terms covers the ones that affect money.
• Payout threshold and schedule. A high threshold means approved commissions can sit unpaid for months.
• The date on any EPC you are shown. Program terms and rates change, so check the current official page rather than a screenshot from last year.

We earn commissions when readers buy through some links on this site, which is exactly why you should treat any EPC figure — ours or a network's — as a claim to check rather than a promise. Two questions do most of the work: whose clicks is this number built from, and what date is it from? A page that cannot answer both is showing you decoration. Nobody can promise you a particular EPC or a monthly income; anyone who does is selling certainty they do not have.

For a wider set of pre-promotion checks, our due-diligence checklist for products you have not bought keeps the decision about the product, not the payout.

Five EPC mistakes beginners make, and the fix for each

1. Counting pending money as earnings. Fix: record approved commissions only, in their own column.
2. Comparing across different periods. Fix: always write the date range beside the result.
3. Reading a program listing as a forecast. Fix: treat it as a crowd average and build your own baseline over four to six weeks.
4. Judging from twenty clicks. Fix: let a page collect a few hundred clicks before you change anything.
5. Chasing high-EPC offers you cannot honestly recommend. Fix: choose what fits your reader, then measure; our guide to writing an honest review of a product you have not bought shows how to stay truthful while you do it.

This week, pick one affiliate link you already have. Set up a click count, note the date range, and start the tracker from the template above. You do not need new tools or a new program to do that — and once four weeks of your own figures exist, a network's EPC becomes what it always should have been: background information, not a promise you were counting on.

Related guides: Affiliate Commission Types Explained; Recurring Affiliate Commissions; Affiliate Cookie Duration and Attribution Windows; Pending, Approved, Reversed, Paid.

This guide is general education, not legal, tax or financial advice. Rules and program terms change; check the linked official pages for the current version and ask a qualified professional about your situation. How we write: editorial policy. This page has no affiliate links.