Labour will abolish fees for taking cases to an employment tribunal if it wins the General Election.
There was a slump in the number of claims after feeds came into effect in 2013.
Charges start at around £160, rising to £250, with a further hearing fee ranging from £230 to £950.
The manifesto says Labour would "ensure proper access to justice in the workplace by abolishing the Government's employment tribunal fee system, as part of reforms to create a system that is quicker for employers and employees and cheaper for the taxpayer".
The announcement was welcomed by trade unions, which have been campaigning to have the fees scrapped.