The company was granted a banking licence by the FSA last week. Its first branches will be in London's Holborn and South Kensington areas, with further outlets to open later in the year.
Metro Bank plans to have a network of about 200 branches across Greater London by 2020, with a national roll-out to follow.
Anthony Thomson, Metro Bank's chairman, said the brand will follow a "local store" marketing strategy, targeting relevant consumers "inside the M25" through appropriate media outlets.
Metro Bank's primary marketing focus will be on public relations and it has hired PR agency Lansons to handle the launch. However, it also plans to run an integrated campaign.
Metro Bank branches will open seven days a week, 8am-8pm Monday to Saturday and 11am-4pm on Sunday, to offer "greater convenience" to its customers.
They will not feature counters and will focus on delivering high levels of customer service, including free coin-counting for customers and non-customers.
Several other brands also plan to enter the high-street banking sector over the next few years, including Virgin Money and Tesco.