Umbrella bodies and voluntary sector organisations are collaborating on a website that maps government spending cuts.
The Voluntary Sector Cuts website will allow people to enter cuts they become aware of on a spreadsheet that is available to the public.
Organisations supporting the project include the National Council for Voluntary Organisations, the chief executives body Acevo, the local umbrella body Navca and the nine regional voluntary networks in England.
The site already records 75 cuts worth more than £2.7m, dating back to May 2010. Visitors to the site can view an interactive map showing where the cuts have taken place and how much they are worth.
Sir Stuart Etherington, chief executive of the NCVO, said: "This project will capture powerful data about where cuts are being made disproportionately and who is being hit the hardest. We urge any organisations affected by cuts to share their stories on the site; together we can send a strong message to government about the scale of the challenges ahead for the sector."
Sir Stephen Bubb, chief executive of Acevo, said: "The sector faces significant challenges in the months ahead. We're hearing daily reports from our members about how cuts from both central and local government are hitting their organisations hard. It is absolutely right that the umbrella bodies in the sector have come together in this way to get the message out."