The "Night Changes" hitmakers - Liam Payne, 22, Louis Tomlinson, 23, Harry Styles, 21, and Niall Horan, 22, - retained the top spot in heat magazine's annual list because of an estimated collective fortune of 82.08 million pounds, up 456 million pounds from last year, reported Female First.
Though he may have quit the group earlier this year, Zayn Malik, 22, has stayed on the list, taking the number eight spot with estimated individual earnings of 20.52 million pounds.
A third star from the wizarding franchise, Emma Watson, 25, also earned a place in the top five, thanks to estimated earnings of 35.33 million pounds.
"Hello" hitmaker Adele, 27, placed fourth, one higher than last year, with an estimated 38.1 million pounds.
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This year's highest new entry came in at number six, with 24-year-old singer Ed Sheeran, who earned an estimated 35.2 million pounds.
Rounding out the top 10 were 'Harry Potter' actor Rupert Grint in seventh place with 27.8 million pounds, Arctic Monkeys frontman Alex Turner in ninth with 13.19 million pounds and Mumford & Sons in 10th with 12.45 million pounds.
To compile the list, a panel of industry experts analysed the stars' financial dealings, including their TV shows, movies, record sales and product endorsements.
Each entry has to be an entertainer, under the age of 30 and born in, or chiefly reside in, the UK.