Boris Johnson is set to lose at least four press officers as a result of proposals drawn up by the Greater London Authority (GLA).
TPA campaigns manager Susie Squire said: 'This is a step in the right direction, particularly now in a recession, as every pound of taxpayers' money is precious.'
Squire added that all local authorities and government bodies should follow Johnson's example and cut back on comms and marketing.
The mayor's proposals are revealed in the GLA Group Budget Proposals and Precepts 2009-10 consultant document, published in December.
It suggests the removal of funding for 4.8 press posts from the mayor's press office.
The mayor's budget for media and marketing for 2009-10 will drop to £3m from £3.8m in the previous year.
Meanwhile, Johnson is calling for the Metropolitan Police Authority to reduce the budget for its directorate of public affairs from £6.7m to £6m.