Key takeaways
- Last-click attribution credits the final affiliate touch before conversion; first-click credits the earliest.
- Last-click rewards closers — coupon and deal partners near the purchase; first-click rewards discoverers — content and review partners.
- Neither is correct in the abstract; the right mode reflects which behavior you want to pay for.
- Your attribution mode directly determines which affiliate gets the commission for the same sale.
- Afflio lets you set the attribution mode for your program so payouts match your strategy.
When two affiliates touch the same customer on the way to a purchase, only one model can be paid — and which one depends entirely on your attribution mode. Last-click and first-click are the two simplest rules, and the choice between them is not a technicality. It decides whether you reward the partner who introduced the customer or the partner who closed them.
What is the difference between last-click and first-click attribution?
Last-click attribution gives all the credit to the most recent affiliate click before the conversion; first-click attribution gives all the credit to the very first affiliate click in the customer's journey. Same sale, same journey — but they can credit completely different partners.
Imagine a customer who reads an in-depth review from Affiliate A on Monday, then a week later clicks a discount-code link from Affiliate B and buys. Last-click pays Affiliate B, the closer. First-click pays Affiliate A, the discoverer.
Both models depend on the same underlying click data — the difference is purely which touch in the recorded sequence the rule selects. That means the quality of your attribution is set by your tracking, not your model: if a touch goes unrecorded because a cookie was dropped, neither last-click nor first-click can credit it. Reliable, cookieless server-to-server click tracking is what gives either model an honest sequence to choose from in the first place.
What does each model reward?
Each model pays for a different kind of work, so each pulls your partner mix in a different direction.
- Last-click rewards proximity to the purchase: coupon sites, deal aggregators, and retargeting partners who appear right before checkout.
- First-click rewards discovery: reviewers, content creators, and educators who introduce your product to people who'd never heard of it.
- Last-click can undervalue the partners who created the demand the closer harvested.
- First-click can overpay an early touch that had little to do with the eventual decision.
The coupon-site critique
Last-click is why coupon and loyalty sites thrive: they intercept customers who already intend to buy. If your data shows the same closers winning credit while content partners get nothing, that's not a bug — it's last-click doing exactly what it does, and a signal you may want a different mode.
When should you use last-click vs first-click?
Use last-click when conversion proximity is what you want to pay for, and first-click when introducing new customers is the behavior you most want to incentivize. If your program lives on deal and coupon traffic and you want to reward whoever seals the sale, last-click is the natural default. If you're trying to grow through content partners who do the hard work of building awareness, first-click protects their economics from being stolen by a last-second coupon click.
Attribution isn't a measurement question, it's a strategy question. You're not asking who deserves credit in some cosmic sense — you're choosing which behavior your budget pays to encourage.
Afflio lets you set the attribution mode for your program, so the same conversion data resolves to the partner your strategy intends to reward. Change the mode and you change which partner earns — which is exactly why it deserves a deliberate decision rather than an inherited default.
Is last-click or first-click attribution better?
Neither is universally better. Last-click is better when you want to reward the partner closest to the purchase, such as coupon and deal sites. First-click is better when you want to reward the partner who introduced the customer, such as content and review creators.
Which attribution model is the default for most affiliate programs?
Last-click is the most common default in affiliate marketing because it is simple and credits the final referral. But common is not the same as correct for your program — if you rely on content partners, last-click may be quietly underpaying them.
Can I change my attribution mode later?
Yes. In Afflio the attribution mode is a program setting you can configure. Be aware that changing it affects how future conversions are credited, so communicate the change to partners whose earnings depend on the model.