Cancer Research UK, the NSPCC, the British Red Cross and the RSPCA have provided the initial funding for a new website designed to boost public confidence in giving to charities.
The site - www.charity facts. org - is due to go live on 18 March and will provide information to donors about what to expect from the organisations they support, and seek to dispel myths about fundraising and giving.
Charityfacts.org is an independent initiative led by Professor Adrian Sargeant, the UK's only professor of non-profit marketing and fundraising.
It is endorsed by the Institute of Fundraising.
The site has been created in response to a public desire for reassurance that as high a proportion of their gift as possible goes straight to the cause, rather than being spent on other functions such as fundraising.
Research shows that people overestimate the amount charities spend on these activities.