Higher rate taxpayers in the UK can (at least for the moment) claim tax relief on charitable donations (which includes subscriptions where a Gift Aid form has been completed) in addition to the amount that we reclaim under the Gift Aid rules. Members may if they wish donate this tax relief to the Guild. US members may also be able to obtain tax relief on their subscriptions as we are a registered charity (in the US a "non-profit" organisation). Members in other countries should check their local tax rules.
UK members may find this link to direct.gov helpful.