How to run affiliate marketing software selection for your brand

What to take away

Affiliate marketing software selection means matching a platform's tracking, attribution and payout features to the commission model your programme runs.
Start with a written requirements document covering tracking method, attribution window, integrations and reporting, then score vendors against it.
Budget beyond the licence fee: implementation, tag management and support usually sit outside the headline price.
Check how VAT is treated on costs passed to affiliates, because the invoicing route changes what you can reclaim.
Get commercial terms, data-processing terms and exit provisions reviewed before you sign.

Start with a requirements document

Selection fails when the shortlist comes before the specification, so write down how your programme earns money first. A voucher-led retailer needs different tracking from a content publisher paid on tenanted deals.

Cover four areas in the document: how clicks and conversions are tracked, how long the attribution window runs, which networks must connect, and what reporting finance needs each month. Add your expected affiliate count and monthly click volume, because pricing tiers move on both.

The affiliate marketing tools and supplier guide for 2027 sets out the wider supplier categories, helping you decide whether you are buying a network, a tracking platform or both.

Compare tracking and attribution properly

Ask every vendor to demonstrate tracking on a live test page, not in a slide deck. Server-side tracking, cookie-less measurement and cross-device matching behave differently, and those differences surface in reconciliation.

Request the attribution rules in writing: last click, first click or a weighted model? What happens when a paid search click and an affiliate click land in the same session? Google's guidance on how Google Ads works helps you explain channel overlap to paid media colleagues.

Questions to put to every vendor

Can you show live conversion tracking through your platform today?
How do you handle deduplication against paid search and email?
What is your standard data retention period and deletion process?

Red flags in a demo

Reporting shown only from a sandbox account with no client data.
No clear answer on how commission is calculated when a return is processed.
Pricing quoted per click without a stated ceiling.

Work out the true cost and VAT position

Licence fees are rarely the whole bill. Implementation, tag management and support often sit outside the quoted platform price, so ask for a three-year total cost of ownership.

VAT treatment matters when you pass costs to affiliates or absorb network charges. GOV.UK guidance on VAT costs or disbursements passed to customers explains when a payment is a disbursement rather than part of your own supply, which changes the invoice.

For smaller teams, the IAB UK SME toolkit for digital advertising covers the commercial basics of buying digital services, useful background before a procurement conversation.

Plan the implementation before you sign

Signature is the start of the work, not the end. Data feeds, tag placement, partner onboarding and finance reconciliation all need owners. For example, a team paying £1,500 a month for a platform licence might spend a further £6,000 on implementation in year one.

Our guide to affiliate marketing tool implementation in England walks through the migration steps, including how to run parallel tracking while the old platform is live.

Use a selection checklist

Requirements document signed off by marketing, finance and IT.
Tracking and attribution rules confirmed in writing.
Deduplication agreed with the paid search owner.
Three-year total cost of ownership modelled, including implementation.
VAT treatment of pass-through costs confirmed with your accountant.
Data processing agreement and retention terms reviewed.
Exit provisions covering data export and notice period checked.
Two reference calls with comparable clients completed.

Common questions

How long should software selection take?

For a mid-market retailer, allow six to ten weeks from requirements sign-off to contract. Compressing that shifts the delay into implementation.

Should we choose a network or a standalone tracking platform?

It depends on where your partners already sit. If most affiliates work through one network, joining it is faster. A standalone platform suits programmes that recruit directly.

Do we need legal review before signing?

Yes for data processing and exit terms. Ask your accountant about VAT on pass-through costs at the same time.