HM Revenue & Customs (HMRC) has issued its Charities newsletter for March 2026, announcing significant changes relevant to registered charities and CASCs in the UK. Key updates include the closure of the service for filing company accounts and tax returns, revisions to tax relief rules for charities and CASCs, and modifications concerning Gift Aid, specifically regarding membership subscriptions and end-of-year letters for Retail Gift Aid. The newsletter also highlights enhancements to the online service for claiming Gift Aid.

Charitable organizations and their advisors should review these updates to ensure continued compliance with tax regulations. Specifically, entities need to be aware of the new procedures for filing company accounts and tax returns, understand the revised tax relief rules, and adapt their Gift Aid processes accordingly. While no specific compliance deadline is mentioned for these changes within the newsletter itself, entities should proactively monitor HMRC communications and update their internal processes to align with the announced changes to maintain their charitable status and tax benefits.