Accounts for 1D Media filed in 2015 show the band spent over £24 million before going on hiatus, but made a profit of £30 million.
One Direction spent a staggering £24.3 million in the year before they went on hiatus.
The 'History' group - which includes Louis Tomlinson, Harry Styles, Niall Horan and Liam Payne - splurged £46,321 on personal styling, £801,163 on travel and meals, and £150,034 on office admin, accounts filed for 1D Media in 2015 show.
The bulk of the group's expenses were the £10.7 million cost of their 'On the Road Again' world tour, but other spending included £9,967 on bank charges, £814,001 on legal matters, £258,625 on crew costs and £97,065 on insurance.
However, despite their vast expenses, the company recorded a £30.6 million profit, with the group, along with former member Zayn Malik, picking up £561,872 in directors' salaries.
A source told The Sun on Sunday newspaper: ''If you're going to be part of a musical juggernaut such as One Direction that makes £63million before tax then you're inevitably going to incur a few expenses along the way.
''But it's fascinating to see just how and where the money was being distributed.
''The next accounts will be for the first year the band didn't release any new music, so profits will inevitably be down. But so will hairstyling costs.''
The 'Night Changes' singers all resigned as directors of 1D Media in April 2016, and each of them made a huge £14 million from selling 10 shares in the company.
Since going on hiatus, the quartet have been working on solo projects, and Harry Styles revealed last week he will be releasing his debut single, 'Sign of the Times', on April 7.
He wrote on Twitter: ''SIGN.OF.THE.TIMES // 7.APRIL.17 // (sic)''
And someone who has already heard the track is Union J's Josh Cuthbert and he said it will ''block your socks off''.
He said: ''Harry Styles's new music is gonna blow your socks off !! X (sic)''
Harry previously teased his solo music with a teaser video that was broadcasted in advert breaks during 'The Voice' on ITV last weekend.
The short clip showed the star, soaking wet, walking across a dark room and towards a door bathed in light. Piano music played in the background before the date ''April 7'' flashed up on the screen at the end.