Singer Adele, who returned from hiatus earlier this year with a new album `25`, has a pending tax bill worth 4 million pounds.

Despite of being inactive last year, Adele is still paying off her tax bills, reports femalefirst.co.uk.

As Adele was still earning royalties from her 2011 album `21` and her 2012 Bond song `Skyfall`, the 27-year-old star's firm Melted Stone Ltd. owes the money in corporation tax, according to the Daily Mirror newspaper.

The `Rolling in the deep` hitmaker is worth an estimated 50 million pound and her latest record, which released in October, sold over 3 million copies in its first week.