11th September 2026
Choosing an affiliate agency in the UK should involve more than comparing retainers, client logos and promises of revenue growth.
Affiliate programmes can look highly successful on paper while delivering very different levels of genuine commercial value.
One agency might grow tracked affiliate revenue by increasing exposure across voucher and cashback partners. Another might generate less immediate last-click revenue while recruiting creators, securing editorial coverage and introducing significantly more new customers.
Both can report growth. But they are not necessarily creating the same value for your business.
If you’re looking for a UK affiliate agency, the most important question isn’t simply:
“How much revenue can you generate?”
It’s:
“How will you make our affiliate programme more valuable and more incremental?”
Here are 12 questions we believe ecommerce brands should ask before appointing an affiliate marketing agency.
This should be one of the first questions you ask any prospective affiliate agency.
Affiliate platforms are very good at telling you which publisher received attribution for a transaction.
That isn’t necessarily the same as telling you whether that publisher caused the transaction to happen.
Imagine a customer:
Traditional last-click affiliate reporting may attribute the entire transaction to the voucher publisher.
But would the customer have purchased anyway?
Possibly.
That’s why sophisticated affiliate management needs to look beyond attributed revenue.
Ask your prospective agency whether it considers:
There isn’t one metric that perfectly determines incrementality.
What matters is whether your agency is actively trying to understand it.
If the answer is simply “we measure ROAS”, we’d ask more questions.
Almost every affiliate agency will tell you it recruits publishers.
The important question is how.
There is a significant difference between approving applications through an affiliate network and proactively identifying partners that could genuinely grow your brand.
A strong recruitment strategy should start with your customer and your commercial objectives.
For example:
Which publishers already influence your target audience?
Where are competitors receiving coverage that you aren’t?
Which creators produce content around your category?
Which editorial publications regularly recommend products like yours?
Which communities or closed user groups contain relevant consumers?
Where are there gaps in your existing publisher mix?
From there, recruitment should become targeted outreach and relationship development.
The objective isn’t to recruit the largest possible number of affiliates.
It’s to recruit the right affiliates.
Ten relevant, activated publishers can be considerably more valuable than 1,000 inactive network approvals.
Be cautious if an agency gives essentially the same publisher strategy to every prospective client.
There is no universal ideal affiliate mix.
The right approach depends on factors including:
A premium fashion brand may require a very different programme from a food gifting business or a subscription company.
A mature programme might include a combination of:
Useful for discovery, recommendations, buying guides, reviews and product-led editorial.
Useful for audience trust, product discovery and increasingly performance-led creator commerce.
Useful for accessing specific audiences and creating controlled offers.
Potentially effective for conversion, loyalty and customer acquisition, depending on the audience and commercial structure.
Useful where consumers actively research products, prices or providers before purchasing.
Potentially valuable, but their role, commission and incrementality should be assessed rather than assumed.
The important point is that your publisher mix should be designed, not inherited.
This is closely related to recruitment strategy, but it’s worth asking separately.
Affiliate programmes can become passive very easily.
The network is live. Publishers apply. Promotions are uploaded. Existing affiliates generate revenue.
The programme appears to be functioning.
But where is the growth coming from?
A good affiliate marketing agency should continually identify new opportunities rather than simply manage the existing publisher base.
That means:
Publisher recruitment should look more like business development than administration.
Ask your prospective agency what proactive recruitment activity you’ll actually receive each month.
Affiliate revenue alone doesn’t tell you whether the channel is expanding your customer base.
For many ecommerce businesses, acquiring a first-time customer is substantially more valuable than converting an existing customer who already knows the brand.
Your affiliate strategy should recognise that.
Ask whether your prospective agency can report new and returning customers at publisher level.
Then ask what it will do with that information.
For example, you could pay:
Higher commission for new customers
and:
Lower commission for returning customers
This creates a financial incentive for publishers to introduce new demand rather than simply monetise existing customers.
The same principle can be applied at partner level.
Publishers demonstrating strong acquisition behaviour can receive better commercials, exclusive offers or additional investment.
Publishers predominantly converting existing demand may require different terms.
Commission should follow commercial value.
A useful answer to this question isn’t:
“Voucher sites are bad.”
Nor is it:
“Voucher sites generate loads of revenue, so they’re great.”
The reality is more nuanced.
Voucher and cashback publishers can provide significant value.
But their contribution should be understood.
For voucher partners, we might investigate:
The findings can then inform commercial decisions.
A publisher creating limited incremental value might receive a lower CPA.
A strategically important publisher delivering acquisition or meaningful influence might justify stronger terms.
The purpose of affiliate management isn’t to favour particular publisher categories.
It’s to understand the value each partner creates.
This isn’t the most glamorous part of affiliate marketing, but it can have a significant impact on profitability.
Not every tracked transaction should necessarily result in commission being paid.
Depending on the business and network setup, validation can account for:
This becomes especially important for ecommerce categories with higher return rates.
Consider the difference between:
Gross affiliate revenue
and:
Kept affiliate revenue after returns and cancellations.
An affiliate agency should understand both.
Growing affiliate revenue while simultaneously allowing unnecessary commission leakage isn’t effective programme management.
Compliance should be ongoing rather than something investigated after a problem appears.
Your agency should be monitoring areas such as:
The precise risks vary by programme and publisher type.
The important thing is having defined rules and monitoring them consistently.
This protects both margin and brand reputation.
This question is becoming increasingly important.
The traditional boundaries between affiliate marketing, influencer marketing and digital PR are becoming less distinct.
Editorial publishers monetise commerce content through affiliate links.
Creators increasingly work on hybrid fixed-fee and performance models.
PR coverage can influence purchases that are later tracked through affiliate.
A sophisticated affiliate strategy should recognise these overlaps.
For example, an ecommerce brand could identify publications it wants to appear in and approach them with:
Some opportunities will be earned editorial.
Others may involve paid media or tenancy.
Some may combine the two.
The point isn’t that affiliate replaces PR.
It’s that PR, content, creator and affiliate increasingly form part of the same commerce ecosystem.
Ask how your prospective affiliate agency works with your internal PR, influencer and marketing teams — rather than operating the channel in isolation.
Affiliate reporting should do more than repeat numbers already available inside your network dashboard.
You don’t need an agency to tell you:
Revenue was £150,000 this month.
You can see that yourself.
The agency should explain:
Why did revenue reach £150,000?
Which partners drove the change?
How much was new customer revenue?
Which publishers grew or declined?
Which partnerships were incremental?
What happened to commission cost?
What opportunities have been identified?
What are we doing next?
Useful reporting should therefore combine performance data with interpretation and action.
Depending on the programme, we’d want visibility across metrics such as:
The report should answer the most commercially important question:
What should we do differently because of this data?
If the answer is:
“We normally set everyone at 10%.”
That deserves further investigation.
Commission is one of the most powerful optimisation tools available within an affiliate programme.
It can be structured around:
Imagine two publishers.
Publisher A generates £20,000 of sales, with 80% coming from new customers.
Publisher B generates £40,000, but only 10% are new.
Depending on your business objectives and attribution data, Publisher A might justify a substantially stronger CPA despite generating less total revenue.
Blanket commission structures ignore those differences.
A good agency should be continually asking:
Where will the next £1 of commission create the most value?
This question often reveals the difference between genuine strategy and generic account management.
A new UK affiliate agency should be able to explain what happens immediately after appointment.
At Conversion Digital, we’d expect the initial period to include areas such as:
Reviewing existing publishers, performance, commission structures, tracking, attribution, compliance and promotional activity.
Agreeing what success actually means.
That could include revenue growth, new customer acquisition, incremental revenue, cost of sale, publisher diversification or specific partner recruitment objectives.
Understanding which existing partners are:
Creating targeted prospect lists based on the gaps and opportunities identified during the audit.
Reviewing CPA structures, new customer incentives, tenancy opportunities and publisher-specific terms.
Ensuring the programme is measuring the right events and commissions are being validated appropriately.
Turning the findings into a prioritised programme of activity rather than a long list of observations.
If an agency can’t clearly articulate what it will change during its first three months, it’s worth asking what exactly the management fee is buying.
Not every ecommerce business needs an affiliate agency.
Some brands have excellent internal affiliate teams.
The question is whether the required expertise and resource already exist within your business.
There’s also a third option.
An agency doesn’t necessarily need to replace your internal team.
Some of the strongest relationships involve an agency acting as an extension of ecommerce, performance, PR or partnerships teams — providing specialist expertise and publisher access while internal teams retain strategic oversight.
There isn’t one standard UK affiliate agency fee.
Common pricing models include:
The brand pays an agreed management fee regardless of channel performance.
This creates predictable costs but doesn’t inherently align agency remuneration with growth.
The agency receives a percentage of affiliate revenue or another performance metric.
This creates alignment around topline performance but can create the wrong incentive if the agency benefits equally from incremental and non-incremental revenue.
A monthly retainer covers the strategic and operational work, with a performance component linked to channel growth.
This is common because it provides resource certainty while retaining a performance incentive.
Whatever the model, don’t evaluate the agency fee in isolation.
The cheapest affiliate agency can become expensive if it:
The more useful calculation is:
What additional profitable value will the agency create after all channel costs?
Not necessarily.
Affiliate marketing is an international industry, and excellent agencies operate globally.
However, a UK affiliate agency can provide advantages for brands focused on the UK market.
These can include stronger relationships with UK publishers, familiarity with the UK affiliate ecosystem, understanding of local ecommerce behaviour and closer knowledge of relevant networks, media owners, creators and promotional calendars.
For a UK-focused ecommerce brand, local publisher relationships can be particularly valuable when the objective is moving beyond passive network affiliates into more strategic partnerships.
There are several things we’d investigate further during an agency pitch.
Volume means very little without relevance and activation.
Ask how.
And ask whether that increase will represent genuinely incremental revenue.
If incrementality, first touch, new customers or cross-channel overlap never enter the conversation, the agency may be optimising purely for network-reported revenue.
An agency can’t design an appropriate commission strategy without understanding the economics of the business.
Programme management without ongoing partner development often leads to stagnation.
Publisher mix should reflect the brand, category and customer.
Revenue matters enormously.
But it should sit alongside cost, customer acquisition, publisher contribution, incrementality and profitability.
Ultimately, your agency should be able to demonstrate progress across three areas.
Is the programme generating profitable growth?
Is the quality and diversity of your publisher base improving?
Is affiliate becoming more useful to the wider business?
That third area is often overlooked.
A mature affiliate programme can support:
The best affiliate agency relationship therefore shouldn’t feel like outsourcing a network account.
It should feel like adding a specialist partnerships function to your ecommerce business.
At Conversion Digital, we don’t believe the objective should be to maximise affiliate-attributed revenue at any cost.
Our objective is to grow the commercial value of the affiliate channel.
That means continually asking questions such as:
Our approach combines six areas:
Audit & Strategy
Understanding the programme before deciding how to grow it.
Partner Recruitment
Proactively finding publishers capable of reaching new audiences.
Programme Optimisation
Improving commission, placements, promotions and existing partner performance.
Revenue Scaling
Investing in partnerships capable of generating sustainable growth.
Attribution & Reporting
Looking beyond topline network numbers to understand where value is actually being created.
Agency Technology Investment
Using technology and data to improve tracking, compliance and decision-making.
Before appointing an agency, ask:
If you receive detailed, commercially grounded answers to those questions, you’re probably having the right conversation.
An affiliate agency helps brands develop and grow their affiliate programme through strategy, publisher recruitment, relationship management, commission optimisation, promotional planning, compliance, transaction validation, reporting and performance analysis.
There is no single best affiliate agency for every ecommerce brand. The right agency depends on your category, programme maturity, markets and objectives. Ecommerce businesses should look for agencies with relevant experience, proactive publisher recruitment, strong publisher relationships and a clear methodology for measuring incrementality.
Evaluate more than agency size and client logos. Ask how the agency approaches publisher recruitment, new customer acquisition, attribution, incrementality, transaction validation, commission optimisation, compliance and content partnerships. You should also establish exactly what activity will take place during the first 90 days.
UK affiliate agency fees vary depending on programme size, scope and complexity. Common models include fixed monthly retainers, performance fees and hybrid arrangements combining a retainer with performance-based remuneration.
An affiliate agency can be valuable when specialist expertise, publisher relationships or internal resource are limiting programme growth. The commercial test should be whether the agency creates enough additional profitable and incremental value to justify its total cost.
Many specialist affiliate agencies work across multiple affiliate networks and partnership platforms. Brands should select the network or platform that best suits their programme rather than choosing an agency purely because it specialises in one technology.
There is no universal timeframe. Existing programmes can sometimes unlock immediate optimisation opportunities, while new publisher recruitment, editorial relationships and strategic partnerships can take longer to develop. A credible agency should establish short-, medium- and long-term priorities rather than guarantee a specific growth timeframe.
If you’re reviewing your current affiliate programme or considering appointing an affiliate agency for your ecommerce brand, we’re happy to start with the programme itself.
Conversion Digital can review your existing publisher mix, commission structure, recruitment opportunities, tracking and approach to incrementality to identify where we believe the biggest growth opportunities sit.
