Two out of three voters believe the Government's planned cap on tax relief for charitable giving will hit donations, according to an opinion poll.
Figures released by the Charities Aid Foundation (CAF) as it prepared to meet ministers to discuss ways of promoting giving, showed 67% believed the cap announced in Chancellor George Osborne's Budget will have a "negative impact".
The poll, conducted for the CAF by ComRes, found 84% supported the principle that donations to charity should not be taxed, while 76% thought ministers should have considered the implications of a cap more carefully.
CAF chief executive John Low said: "It is clear there is deep unease among the public at this unfair and damaging cap on tax relief for donations.
"People in this country are concerned that the economic situation will damage charities, whose vital work benefits everyone in society. This tax change will make a difficult time for charities even worse."
ComRes surveyed 2,044 GB adults online between April 27 and 29.