The Charity Tax Group is drawing up a complete guide to all the taxes that charities are liable to pay.
The group, which lobbies on tax issues on behalf of charities, will make a list of the anti-avoidance legislation charities must comply with and explain the circumstances in which they can receive relief on taxes they would normally pay, such as VAT. A series of case studies will be included in the guide.
The Charity Tax Map, which is being funded by the Nuffield Foundation, so far addresses 152 separate areas of tax law.
It is intended to help charities understand their own tax situations and will be available early in 2010, initially on paper, then later on the internet.
Mathieu Mori, policy officer at the CTG, said several of the group's members, including specialist law and accountancy firms, would draft guidance for charities on how to handle individual taxes about which they had specialist knowledge.
"We believe we have identified all the taxes charities have to pay, but we're still consulting to make sure we have an exhaustive list," he said.