Think tank New Philanthropy Capital has launched a paper encouraging charities to prove their value to the deficit-cutting government.
Proving Your Worth to Whitehall uses the nine questions the Treasury will ask every Whitehall department to answer during the autumn spending review, and applies them to a charity.
They include whether an activity provides substantial economic value and whether it is essential for meeting government priorities.
The paper uses CSV's Volunteers in Child Protection project, a scheme that provides volunteer mentors for families with children on child protection plans, to show charities how they can answer the questions.
It says that if charities can answer these questions, it will help them build a stronger case for survival in the face of spending cuts.
Martin Brookes, chief executive of NPC, said charities needed to subject themselves "to the same scrutiny faced by government departments".