UBS Group AG will allow around two-thirds of its staff to mix working from home and the office as an employment perk after determining it won’t hurt productivity.

The Swiss bank, a big employer in several countries including the U.S., told staff on Monday about its commitment to flexible working. It marks a departure from other major banks, including Morgan Stanley, Bank of America Corp. and Goldman Sachs Group Inc., that are pressuring employees to return to the office as coronavirus lockdowns and safety measures ease.

UBS in an internal announcement said staff whose roles, tasks and locations allow it will be offered the option of hybrid working from the office and from home. It is rolling the program out across countries in coming months. The bank said the flexibility would still be subject to other approvals, such as by line managers, and “doesn’t mean that you can work wherever and whenever you want.”

The bank looked into moving to a hybrid model in response to employees saying they wanted more flexibility on a permanent basis, and that the practice would make it a more attractive employer. It also said it already has reviewed which roles could be done on a hybrid basis and those that can’t, such as in-branch personnel and some regulated jobs.

The move is being championed by Ralph Hamers, who started as chief executive in November. After the onset of the pandemic last year forced many employees to plug in from home, UBS executives had said teams adapted quickly to interacting with each other and clients via video calls and other digital channels. Its executives were among those making early predictions that flexible working would be permanent.

Mr. Hamers, who joined from ING Groep NV, was hired to help UBS modernize its technology and how it interacts with customers. He has said he wants to shed the bank’s bureaucratic image with a more agile corporate culture. Around 21,000 of its 71,550 employees are in Switzerland and around the same amount are based in the U.S., according to its 2020 annual report.

The bank’s main business is catering to the world’s rich for banking and wealth management, and it operates an investment bank competing with Wall Street giants.

Executives of banks that are taking a more skeptical view of flexible working have said they want most staff to return to the office to encourage career development and productivity.

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