Turnover fell to £37.5 million last year against £79.6 million in 2012 and £111.7 million in 2011 when Adele’s sales were at their zenith.
Operating profits also halved last year and the accounts warn of another fall in 2014.
XL is one of London’s most successful independent labels, with a string of top artists from Jack White and Thom Yorke’s Atoms for Peace to younger stars FKA twigs and SBTRKT.