Affiliate commission groups are having a moment. Awin's latest analysis of programme data reports that advertisers running four or more commission groups generate over six times the sales value of those on a single flat rate (Awin, 2026).
At face value, that's a compelling statistic. But it raises an important question: is commission complexity driving performance, or are successful programmes simply more likely to have complex commission structures?
After more than 20 years working across affiliate marketing, I'm not convinced the relationship is as straightforward as it first appears.
Correlation isn't always causation
The most sophisticated affiliate programmes tend to share a familiar set of characteristics:
- Larger budgets
- Dedicated affiliate managers or agencies
- Greater publisher diversification
- More tenancy and promotional investment
- Stronger publisher relationships
- Ongoing optimisation
These programmes are also more likely to run multiple commission groups. So when the data shows that programmes with four or more groups outperform those on a single rate, it's worth asking a harder question. Is the commission structure the cause of that performance, or simply one characteristic shared by already successful programmes?
The distinction matters. If commission complexity isn't genuinely influencing publisher behaviour, we may be solving the wrong problem.
Do publishers really pay that much attention?
One of the biggest assumptions behind tiered commission structures is that publishers actively study them and adjust their behaviour accordingly. In reality, most don't.
A content publisher deciding whether to feature a brand is usually weighing up:
- Is there audience demand?
- Will the content convert?
- Is there a compelling offer?
- Is there an exclusive angle?
- Is there promotional budget available?
They're rarely analysing a commission matrix and choosing which product category to feature based on a percentage point difference in commission. Different publisher types behave in very different ways, which is one reason defining your own publisher categorisation is so valuable. Very few of them, though, are optimising around your rate card.
Editorial, influencer and partnership publishers often have little visibility into what a customer will ultimately buy. That makes it difficult to optimise around complex commission structures even if they wanted to.
The cashback headline problem
One area where commission complexity often appears is cashback. Sometimes this is commercially justified. Other times, it feels more like a visibility exercise.
By creating multiple commission groups, an advertiser can secure a more eye-catching listing alongside competitors: "up to 15% cashback" rather than "5% cashback". The challenge is that the headline rate may only apply to a small subset of products or customers.
While this can improve visibility within cashback listings, it's worth asking whether we're optimising for commercial outcomes or simply creating more attractive publisher placements. The two aren't always the same thing. If visibility is the real goal, it's often better bought deliberately through a strategic approach to tenancy investment than engineered through headline rates.
Why new customer commission often misses the point
New customer commission structures are one of the most common examples of affiliate complexity. The theory is simple: pay publishers more for new customers and they'll drive more new customer sales. The reality is often very different.
A cashback site cannot turn an existing customer into a new customer. The customer either has a previous purchase history or they don't. What cashback and loyalty publishers are genuinely good at is:
- Driving repeat purchases
- Increasing purchase frequency
- Keeping brands front of mind
- Building customer loyalty
In many cases, a blended commission rate across all customers may align better with the value these publishers create. Rather than rewarding an outcome they have limited control over, it rewards the behaviour they genuinely influence.
Can commission tiers really drive higher basket values?
Another common approach is to increase commission rates above certain order values. Again, the logic sounds sensible. But can publishers actually influence basket size through the commission structure they're paid? Usually not.
That doesn't mean publishers can't drive higher basket values. Voucher code partners, in particular, can absolutely influence spending behaviour through customer-facing mechanics such as:
- Spend and save promotions
- £10 off £75 offers
- £20 off £100 offers
- Multi-buy incentives
These incentives genuinely encourage shoppers to spend more. The key point is that the behaviour is driven by the offer the customer sees, not by the commission structure the publisher receives. The shopper never sees the commission rate. They see the discount.
The problem with performance-based tiers
Many programmes still operate structures such as 5% commission as standard, 6% above £10,000 in monthly revenue and 7% above £25,000. On paper, this appears to reward growth. In practice, these structures are often largely ignored.
Most publishers don't actively monitor them. Many affiliate managers don't communicate them particularly well. And the publishers that reach the higher tier would often have achieved that level of performance regardless. The result is additional complexity without any meaningful change in behaviour.
None of that is an argument against rewarding growth. A well-designed publisher incentive, actively communicated and tied to outcomes a partner can influence, is a different thing entirely. A silent tier buried in programme terms rarely changes anything.
Complexity creates its own challenges
The more commission groups a programme introduces, the harder it becomes to answer some basic questions:
- Why are we paying different rates?
- Which commission groups are actually influencing behaviour?
- Which are simply adding administration?
- What incremental value are we receiving in return?
It's not unusual to see programmes running new customer rates, existing customer rates, product category rates, publisher type rates, performance tiers and seasonal bonuses all at once. At some point, complexity stops being a growth strategy and becomes a management challenge.
Where affiliate commission groups do make sense
None of this is to suggest commission groups are inherently bad. Far from it. They can be incredibly useful where there are genuine differences in commercial value. For example:
- High-margin versus low-margin categories
- Subscription versus one-off purchases
- Different customer lifetime values
- Strategic publisher agreements
- Bespoke commercial partnerships
In these scenarios, commission groups act as a commercial management tool. That's very different from assuming they are automatically a growth lever. I've covered the mechanics in how to structure affiliate commissions to drive performance. The principles there still stand: differentiate where value differs, and keep it simple everywhere else.
The influence test
Affiliate marketing is often at its most effective when it's easy for everyone involved to understand. Publishers want clarity. Advertisers want transparency. Managers want to know what's actually driving performance.
So before adding another commission group, another tier or another exception, ask one question: can the publisher genuinely influence the outcome we're trying to reward? If the answer is yes, the commission structure may help drive growth. If the answer is no, we may simply be adding complexity for complexity's sake. Here's how the test plays out against the most common structures:
Applied honestly, the test tends to strip a programme back to a handful of groups that each earn their place. That clarity pays off well beyond the rate card. Performance becomes easier to read, publisher conversations become easier to have, and scaling the programme becomes considerably more straightforward.
EngageMore's verdict
Commission groups are a commercial management tool, not an automatic growth lever. The network data tells us that sophisticated programmes tend to use them. It doesn't tell us the groups themselves are doing the work. Budget, relationships, tenancy and constant optimisation are the more likely engines, and complexity is often just along for the ride.
My advice: run every commission group through the influence test. Keep the ones that reward behaviour a partner can genuinely change, and fold the rest back into a simple blended rate. In my experience, simpler programmes often outperform more complicated ones for exactly that reason.
If your commission structure has grown more complicated than the strategy behind it, book a free growth audit and we'll help you work out which groups are earning their keep.
Frequently asked questions (FAQ's)
Common questions about affiliate commission groups and tiers
How many commission groups should an affiliate programme have?
As few as your commercial strategy genuinely requires. Add a group only where there is a real difference in commercial value, such as margin, customer lifetime value or a bespoke partner agreement. Every group adds administration, so each one should have to justify itself. Many strong programmes run happily on one or two.
Do tiered affiliate commissions actually change publisher behaviour?
Rarely on their own. Most publishers don't monitor tier thresholds, and the partners who reach a higher tier would usually have hit that performance level anyway. Behaviour tends to shift through offers, exposure and relationships rather than silent rate mechanics. If you want a tier to work, communicate it actively and tie it to outcomes the partner can influence.
Should I pay a higher commission for new customers?
Only where the publishers you're rewarding can genuinely influence acquisition. Content, comparison and influencer partners can put your brand in front of new audiences. Cashback and loyalty sites cannot turn an existing customer into a new one, so for those partners a blended rate across all customers often reflects their value more accurately.
What is a blended commission rate in affiliate marketing?
A single rate paid across all customers or products rather than splitting commission into groups. It is simpler to communicate, easier to administer and often aligns better with the repeat-purchase value that cashback and loyalty publishers create. The trade-off is less precision, which matters most where margins vary sharply between product lines.
Why do advertisers offer "up to" cashback rates?
Running multiple commission groups lets an advertiser promote a headline rate that may only apply to a subset of products or customers. It can improve visibility in cashback listings, where shoppers compare rates at a glance. The commercial question is whether that visibility converts into incremental sales or simply a more attractive placement.
