For one year, Norton Rose employees (including partners) would choose between a four-day week, a paid sabbatical of four to 12 weeks, or both.
Employees would earn 85% of their salary for the four-day week, while the sabbatical option would be paid out at 30% of base salary.
If approved, the scheme will run from May 1st, 2009.
Last month, the firm offered incoming trainees cash to defer their start dates.
The Norton Rose Group is a leading international law firm. It offers business law services from 20 offices across Europe, the Middle East and Asia. With around 1000 lawyers, its practice specializes in five key areas: corporate finance, financial institutions, energy and infrastructure, transport and technology.