The increase is the first since Europe's biggest economy first introduced a national minimum wage of 8.50 euros on January 1, 2015.
Chancellor Angela Merkel had for long been opposed to setting a minimum rate, but signed off on it in order to get the centre-left Social Democrats to be junior partners in her ruling coalition.
Unions and employers in Germany's powerful metalworking industry agreed on a 4.8-percent pay hike in May, setting the tone for salary negotiations in most other key sectors of Europe's biggest economy.