- guardian.co.uk, Monday 8 June 2009 12.00 BST
The broadcaster has since the 2006 series given 10p to charity for every vote cast in the reality TV show, which returned for its 10th series last week. It blamed the ongoing economic downturn and slump in advertising for the decision.
Channel 4 said the Big Brother vote line had been losing money for the last couple of years, and it was no longer prepared to bear the cost. Phone votes for the new series will be charged at 35p from a landline.
"The costs associated with running the Big Brother vote line have meant it has run at a considerable loss for the last couple of years," said a Channel 4 spokesman.
"Given the current climate, after very careful consideration, Channel 4 has regretfully decided not to make charity donations for this series of Big Brother in order to limit this loss and ensure we are managing our finances optimally to allow us to continue delivering our public service remit."
The broadcaster said the decision to axe the charity payments had been made in response to a downturn in the UK advertising market that has led Channel 4 to cut its programme and content budget by more than 10% this year.
Before 2006 the phone vote had been run "purely on a for-profit basis", Channel 4 added, and today's decision would "bring the programme into line with reality series on other channels including The X Factor, Dancing on Ice and Strictly Come Dancing".
Channel 4 said it was the only one of the major commercially funded broadcasters not to run premium rate services for a profit
This was a policy introduced in 2007 following a string of phone-in scandals, including the You Say, We Pay competition on Channel 4's Richard & Judy daytime show.
• To contact the MediaGuardian news desk email firstname.lastname@example.org or phone 020 3353 3857. For all other inquiries please call the main Guardian switchboard on 020 3353 2000.
• If you are writing a comment for publication, please mark clearly "for publication".