Little Mix have set up a business to look after their £1.2m earnings.
The 'Change Your Life' hitmakers - who are made up of Perrie Edwards, Jesy Nelson, Leigh-Anne Pinnock and Jade Thirlwall - have created Eternal Dance Media to take all of their income after they netted a profit of £464,893.
A source said: "The girls have barely had any time off since they won 'The X Factor'. They got straight into the studio, then their tour, then were thrown into trying to crack America.
"They're now starting to see some proper rewards for all of the hard graft.
"For a long time they were only on a very small amount of money, because it always takes a while for song royalties to come through. But now it's started to come in thick and fast."
The business-savvy girl band - who shot to fame after winning 'The X Factor' in 2011 - made £1.2m in the financial year ending December 2012 and are set to rake in plenty more this year thanks to
their album royalties and income from their 'DNA' tour.
The source added to The Sun newspaper: "Given the girls have almost no expenses -- they are always working, they get most of their clothes free and things such as bottle service in nightclubs are gratis -- a lot of the income into that business will be saved up."