"Back to Black" debuted at number three on the UK Albums Chart on 5 November 2006 with first-week sales of 43,021 copies. The album reached number one for the first time during the week ending 20 January 2007, its 11th week on the chart, selling over 35,500 copies. The following week, it remained at number one with nearly 48,000 copies sold. Five weeks later, it returned for a third week atop the UK chart, selling 47,000 copies. "Back to Black" was the best-selling album of 2007 in the UK, having sold 1.85 million copies. The BPI certified the album 13-times Platinum on 30 March 2018, and by October 2018, it had sold 3.93 million copies, making it the UK's second best-selling album of the 21st century so far, as well as the 12th best-selling album in the UK of all time.