What is Gift Aid? Gift Aid allows UK charities to claim back the basic rate tax already paid on donations by the donor. This means we can claim back from the government on your behalf 25p for every £1 donated, boosting the value of the donation by a quarter. How does Gift Aid work? When a UK taxpayer gives a gift of money to a charity, tax has already been paid on that money. Because you are exempt from tax, we can claim this money back from HM Revenue & Customs (HMRC) and give it to you. For more information on how Gift Aid works, please click here.