The cost of street fundraising through agencies has been rising as the public has become less receptive, leading more charities to look at recruiting their own street fundraising teams.
Matt Goody, head of direct marketing at Shelter, said the results of its first week of fundraising using the in-house team were incredible.
"Within the first week they have already hit targets that we didn't think they would hit for three or four weeks," he said. "They seem to have proven this is a viable option."
Shelter has used professional fundraising agency Gift for three years and Goody said it would keep the agency on while experimenting with an in-house team.
He said one advantage was that there was no VAT charged on in-house fundraising, immediately saving the charity 17.5 per cent of costs. Another benefit is the ability to monitor attrition and complaints much more easily, and test out new products and approaches.
Action for Blind People started using its own team of in-house fundraisers in August.