The analyst firm said the BPO market is one of the fastest growing segments in European financial services technology, as companies continue to try and cut costs and improve operational efficiency.
A number of large organisations have signed BPO deals in recent months, including Procter and Gamble and Thames Water.
However, although service providers promise significant savings with BPO, analysts suggest customers may be disapointed.
Forrester Research recently warned IT managers that companies are exaggerating their capacity to offer end-to-end business process outsourcing services.
Forrester surveyed 82 senior IT executives and had in-depth interviews with 12 BPO early adopters, and found that BPO suppliers are not matching expectations.
Forrester highlighted difficulty in measuring the provider's performance and strained interaction with the service provider exacerbated by inflexible contracts.