The 9,000 staff at Fujitsu Services were originally due to receive a pay review in June. This was then deferred to October. The pay review has now been put back to next April.
A spokesman for Fujitsu Services - formerly known as ICL - said the economic downturn was the reason for deferring the pay review even further.
The pay freeze, announced internally earlier this week, will further dent morale among Fujitsu Services' beleaguered staff. Nearly 2,000 UK jobs were cut earlier this year through a mixture of compulsory and voluntary redundancies.
In a separate announcement last year, Fujitsu Services said it planned to cut 16,000 jobs worldwide.
Peter Skyte, national secretary of IT professionals association Amicus, said the pay review has been handled badly.
"The fact that this [pay freeze] has happened on top of job losses earlier this year that were supposed to put [Fujitsu Services] onto a sound footing has eroded confidence in the management of the company. You cannot expect to recruit and retrain skilled IT professionals with hints but no firm promise of jam tomorrow."