Tying every donation to its source: attribution for UK charities.

Why it matters

Trustees and fundraising teams make the same decision every quarter: where to spend the next pound to raise the most. Without a reliable source on each donation, that decision rests on instinct, on whichever platform reports the biggest number, or on the campaign with the loudest launch.

When every donation has a source, the conversation changes. You can see which campaigns raise money and which only raise awareness, which appeals bring in regular givers rather than one-off gifts, and which channels are worth their cost.

Why the trail breaks

On your own donation form, the trail breaks when consent is declined, when the confirmation page isn't tagged, or when the form is embedded from another domain. On third-party platforms such as JustGiving or Enthuse, the donor leaves your site, and the platform reports the gift while your analytics never sees it.

Campaign and event pages each have their own links, often shared without campaign tags. Social fundraisers arrive as a lump sum with no link to the original post. Text giving involves no web visit at all. Direct debit sign-ups produce a first payment weeks later, in a different system. Cheques, bank transfers and cash are recorded by hand, often with no source field. And Gift Aid changes the value after the fact and is claimed separately.

No single tool sees all of this. Analytics sees website visits. The donation platform sees its own gifts. The CRM sees what someone entered. Attribution only works when those are joined.

Decide what source means first

Before any tracking change, agree a short list of sources the whole organisation will use. Without it, the same campaign gets recorded as Facebook, FB appeal, Spring social and Paid social by four different people.

A workable structure has three levels. Channel: email, paid social, organic search, direct mail, events, partners or offline. Campaign: the named appeal or activity, such as Winter appeal 2026. Detail: the specific email, ad or page, where it is known. Write the list down, share it with everyone who enters data, and use exactly the same names in campaign links, the donation platform and the CRM.

How to set it up

Tag every link in every email, ad, social post, partner page and QR code with campaign tags using the agreed names, built from a shared sheet so nobody types them freehand.

When a supporter lands on your site, store the campaign details and pass them into the donation form as hidden fields. The source is then saved with the gift itself, in your donation system and CRM, not only in analytics. It still reaches the CRM when analytics consent is declined, because it is part of the transaction record. Check your privacy notice covers this.

In GA4, send a donation event with a unique ID, the amount, the currency and whether it is one-off or regular, and mark it as a key event. Test every payment route. Export third-party platform donations with their campaign or page identifiers and import them into the CRM with the source attached. Add a required source field to the CRM screen used for cheques, bank transfers and phone gifts, and use appeal codes on printed materials and reply slips.

Finally, build one report that combines CRM donations, the money, with analytics, the journey, by campaign. Finance's total should match the CRM total, and the report should show what share of income has a known source. That share is the number to improve.

What trustees get

Income by channel and campaign, from the CRM and matching Finance. Cost per pound raised for each paid campaign. Regular giving sign-ups by source, not just one-off gifts. And the share of income with an unknown source, tracked month by month.

You don't need an expensive CRM for this. Agreed source names, hidden fields on forms and a required field for offline gifts work in most charity CRMs. Report Gift Aid as its own line rather than adding it to the original donation by source. For a charity with one donation platform and a CRM, the core setup is usually a few weeks of work, including testing.

If your fundraising reports start with we think, our Discover audit maps every donation route, finds where the trail breaks, and gives you a plan to tie new donations to their source.