25th March 2026
Affiliate marketing is often criticised for “claiming” sales that would have happened anyway.
This is where incrementality becomes critical.
Understanding and improving incrementality is what separates high-performing affiliate programs from those that simply recycle existing demand.
Incrementality refers to how much of your affiliate revenue is truly new or influenced by the channel, rather than captured at the final step of the journey.
Most affiliate programs operate on a last-click model.
This means:
The result: a distorted view of performance.
These partners aren’t inherently bad — but over-reliance limits growth.
Shift focus toward:
Incentivise:
Look beyond last click:
Too many codes = reduced perceived value + lower incrementality.
A well-optimised affiliate program should:
Affiliate marketing isn’t just about volume — it’s about quality of revenue.
Brands that focus on incrementality see:
Want to understand how incremental your affiliate channel really is?
Speak to our team at Conversion Digital.
