EPC and click costs: calculate your break-even point
Calculate earnings per click, a maximum CPC and a cost buffer using a worked example and comparable, sufficiently mature data.
A high payout per event does not automatically make an offer profitable. What matters is confirmed earnings across a comparable set of clicks. Here EPC means publisher earnings per click, using confirmed rewards after known reversals. Pending amounts stay separate.
1. Use a consistent basis
Select clicks from one campaign and period with the events attributed to those clicks. Do not divide today’s approvals of older conversions by today’s clicks. Record whether you count unique or all clicks, the currency and the reporting cutoff. Compare groups with similar time allowed for approval; immature data can substantially understate EPC.
2. Calculate three figures
Illustrative example, not a client result: 2,000 clicks generated $120 in confirmed rewards. Media cost $80 and attributable additional costs were $10.
- EPC = $120 / 2,000 = $0.06.
- Actual media CPC = $80 / 2,000 = $0.04.
- Remainder after these costs = $120 − $80 − $10 = $30.
The zero-remainder CPC ceiling is ($120 − $10) / 2,000 = $0.055. To keep a $20 reserve under the same assumptions, the ceiling becomes ($120 − $10 − $20) / 2,000 = $0.045. This reserve is a chosen absolute amount, not a margin percentage. Taxes and unallocated fixed costs are not calculated here.
3. An average is not a guarantee
Scaling changes buying prices, audiences and approval rates. Model lower confirmed earnings and higher costs. Set a test cap and review date beforehand. With few events, the average is unstable; one large result may change the conclusion.
EPC is not a withdrawable balance: confirmation, hold periods and settlement timing can differ. Plan working cash for media purchases separately.
4. The advertiser’s perspective
A partner’s EPC is not the advertiser’s business return. Advertisers need total acquisition cost, acquired customer quality and an agreed revenue basis. Account for commission according to the terms without adding it twice when already included in spend.
The working table should include clicks, confirmed rewards, pending amounts, costs, group age, EPC and the chosen CPC ceiling. Both sides must use the same period and event-status definitions.