He said: "We call on John Swinney to use the forthcoming Scottish budget to implement a Scottish alternative which recognises that raising wages boosts growth and is vital in building a sustainable economy for Scotland's future.
"This means committing the resources to support pay rises that at least keep pace with inflation."
PCS Scottish secretary Lynn Henderson said: "Against a background of rising household costs, increased pension contributions and job losses, it is particularly disappointing that Scottish ministers continue to follow Westminster's lead and impose a pay freeze on their own staff and those who deliver Scottish public services for them.
"It is massively unfair to attack the livelihoods of public-sector workers who are not to blame for the economic mess but are expected to carry the burden of austerity measures."
When he announced his budget for 2012-13 last September, Mr Swinney said he hoped to be able to end the pay freeze in 2013-14. The Finance Secretary said at the time: "My aim is that 2012-13 will be the last year of a pay freeze and we may be able to see modest increases in the years that follow."