Steer clear of these affiliate marketing strategy mistakes

What to take away

Examples include programmes run through Awin, CJ Affiliate and impact.com, plus the Amazon Associates UK programme. Their terms and tracking arrangements are not interchangeable, so check the actual programme settings and terms rather than assuming a network-wide default.

Which commission model mistakes should you check first?

Start with how you pay. A flat percentage across every partner type is a common planning error, because content publishers, voucher codes and cashback sites create different value.

Model the payout against margin, not revenue. A partner driving sales of low-margin goods can look strong on a dashboard while losing money on every order.

VAT treatment changes the picture. Goods at different rates carry different net revenue, so check the VAT rates on different goods and services before setting a headline commission.

A worked example shows the effect. Take a sale of £120 including VAT at 20 percent. The VAT element is £20, so net revenue is £100. A 10 percent commission paid on that net figure is £10, leaving £90 net of commission. These figures are illustrative, and your own rates and costs set the final number.

Are you recruiting partners before defining the channel role?

Recruitment without a defined role floods a programme with partners chasing the same last click. Decide whether the channel serves acquisition, retention or reactivation before you open applications.

Then match partner types to that role. A review site suits considered purchases, a cashback partner suits repeat buyers who already know the brand.

Write a channel plan that assigns budget by partner role rather than spreading it evenly. Record the reason for each allocation so you can review it against results.

Do you know what your disclosure and data duties are?

Affiliate links must be identifiable as commercial. If a reader cannot tell that a link earns you money, the promotion is misleading.

In the UK, the Advertising Standards Authority (ASA) applies the CAP Code, which requires marketing communications to be obviously identifiable as such under rule 2.1. The Competition and Markets Authority (CMA) can also act where an affiliate promotion misleads consumers. For examples, check the ASA's online rulings database and the CMA guidance Social media endorsements: being clear with your audience.

Apply the checks to a named setup: an Amazon Associates UK publisher should review disclosure on each placement and verify that any tracking respects PECR. If the programme runs through Awin, CJ Affiliate or impact.com, check its own programme terms and tracking settings too; do not assume identical attribution or commission rules.

Data handling is the second duty. For electronic direct marketing, check PECR's consent rules and exceptions, and identify a UK GDPR lawful basis where personal data is processed. The ICO's step-by-step guide to direct marketing for your small business explains consent and opt-out requirements. PECR regulation 6 covers storing information on, or accessing information on, a user's device: tracking cookies and similar technologies generally require consent unless an exception applies. Assess each tracking method rather than treating all pixels alike.

Are you measuring the wrong things?

Last-click attribution overstates closing partners and understates everyone who introduced the customer earlier. If reporting only credits the final click, optimisation follows the wrong signal.

Set a small number of measures: incremental sales, new-customer share, cost per acquired customer. Review them monthly against the plan.

Set a planning cycle that links budget, partner mix and measurement; review the same measures against the plan at each scheduled review.

Are you treating compliance as a one-off?

Rules, platform terms and partner behaviour change.

Put a quarterly check in the calendar: disclosure wording, partner content samples, data permissions. Record what you checked and what you changed.

For disclosure and tracking, check the UK-wide CAP Code and PECR requirements alongside the specific platform and programme terms.

What sequence should you follow to audit your programme?

Common questions

How often should an affiliate programme be reviewed?

Quarterly works for compliance and partner mix, with a deeper annual review of commission models and budget allocation. Anything reviewed only at launch will be out of date within a year.

Does one UK rule cover England, Scotland, Wales and Northern Ireland?

There is no single rule covering every issue. For affiliate ad disclosure, the CAP Code applies across the UK; PECR is UK-wide for relevant cookie and device-access rules. Check the specific requirement rather than assuming separate devolved rules.

What is the most expensive mistake to fix later?

Weak disclosure is the hardest to unwind, because it affects past promotions as well as current ones. Commission and attribution errors cost margin, while disclosure failures carry enforcement risk.

Should small brands use the same commission rate for every partner?

No. Different partner types generate different value and cost. Set rates against margin and role, then review them as the mix changes.