An anonymous reader writes: The Seattle City Council announced on Monday that it has unanimously approved a $15 per hour minimum wage mandate. The new rate will go into effect starting April 1, 2015 in a tiered, gradual manner that depends on employer size. In the first year of implementation, hourly minimum wage will be raised to either $10 or $11 according to the employer size category. By 2021, hourly minimum wage across the board should be at or above $15. Seattle is the first city to implement a living wage for its lowest earners.