Around 3,500 IT staff at HSBC bank will be given two years' notice of any future plans to outsource IT systems or business processes overseas, under a new agreement.
The agreement, signed earlier this week between HSBC and banking union Unifi, includes a commitment to provide staff with two years' notice of plans to move IT systems or business processes offshore and seek to avoid compulsory redundancies.
Last year, HSBC announced plans to move around 4,000 call centre and data processing jobs overseas.
The HSBC agreement comes one month after Barclays Bank agreed a similar deal with Unifi over offshore outsourcing.
Outsourcing experts said the HSBC deal was likely to set a benchmark for employee consultation over offshore outsourcing deals.
"The HSBC deal demonstrates that organisations are viewing their offshore plans as an integral part of their business planning rather than just a cheap short-term option," said Alex Blues, head of the offshore outsourcing practice at outsourcing advisory firm Orbys Consulting.
"Offshore outsourcing is still a sensitive issue but [agreements such as HSBC] can reduce the negative impact offshore outsourcing on staff."
A growing number of UK companies have moved IT and business operations to lower cost-countries over the past few years.
Analyst firm Ovum Holway has predicted that up to 25,000 UK IT jobs will be lost in the next three years through offshore deals. Most job losses to offshore outsourcing so far have been in call centres, but some experts believe that more senior staff will be at risk.