The trade union Unite is to meet management from Action for Children in a bid to avert possible strike action at one of its projects in a dispute over terms and conditions.
Eight members of staff at the charity's House on the Hill project in Lewisham, south London, which provides residential care for eight to 18-year-olds, are due to vote over whether they should strike over new contracts.
Rachael Maskell, national officer for the community and not-for-profit sector at the trade union Unite, which represents the staff, said she was hoping to arrange a meeting in the next few days with Action for Children management.
She said the charity had told the staff they had mistakenly been put in too high a salary band and wanted to move them into a lower one.
This would reduce their salaries and their annual leave entitlement, she said, and the lower leave entitlement could breach working time regulations.
If the staff vote in favour of strike action, a walkout could happen before the end of January.
An Action for Children spokesman said the charity was unable to comment on the situation while negotiations were continuing.