An additional 10 charities will be able to take John Lewis staff on free secondments after the retailer decided to increase the number of placements it will offer this year.
Under the Golden Jubilee Trust programme, selected John Lewis or Waitrose staff complete secondments at charities either part time or full time for up to six months.
The scheme is sponsored by the John Lewis Partnership, which is putting an additional £50,000 into it to mark its 10th anniversary.
Under the next phase of the programme, which starts in the autumn, the retailer plans to arrange 32 placements instead of the usual 22.
The additional placements will result in an extra 5,000 hours of staff time given to charities, according to John Lewis. Placements are arranged twice a year and the numbers of secondments will return to the usual 22 per intake in 2011.
Chris Jones, manager of the Golden Jubilee Trust for the John Lewis Partnership, said: "This year's extra funding will give the programme an additional boost and enable us to give much-needed support to even more charities.
"We encourage charities of all sizes to approach us if they'd like to find out more about how they might benefit from the Golden Jubilee Trust."