Charities taking part will be asked questions about their accountability to stakeholders, methods of statutory reporting, governance and communications. Charities will then be able to compare themselves against a sample of other results.
Results from individual charities will remain confidential. Charities will have to join ImpACT to take part, but membership is free.
"It will enable a charity to hold up a mirror to itself so it can see where its strengths and weaknesses are," said Richard Marsh, director of the coalition. "It won't give us the last word on charities; it will capture case studies in a meaningful and methodical way."