Producer Judy Craymer has amassed a €98m million fortune thanks to the hit show. She is the highest new entry in the music rich list compiled by the Sunday Times.
Craymer had the original idea for the musical based around the hits of the Swedish supergroup and remortgaged her home to fund it.
The musical opened in London's West End in 1999 and went on to become the world's most successful show.
It has taken $1 billion at the box office and been seen by 20 million people around the world. The show recently opened in Sweden.
Craymer, who developed the project with playwright Catherine Johnson and the members of Abba, is at number 31 on the music rich list.
Top of the list for the second year running is former record label boss Clive Calder, whose wealth has risen to €1.8bn.
Calder, the man behind acts including Britney Spears, made his fortune by selling his independent label Zomba to record giant BMG.
Paul McCartney is second with €1.2bn million, up €58m on last year.
The Sunday Times estimates Andrew Lloyd-Webber's wealth at €1bn - €437m up on last year - after he put some of his theatres up for sale.
Madonna and husband Guy Ritchie are fifth with €342m. Elton John (€269m), Sting (€269m), Sir Mick Jagger (€262m) and Tom Jones (€255m) are also in the top 10.
But Pop Idol mogul Simon Fuller has seen his wealth plummet from €320m last year to just €109m this year after selling his entertainment company 19 for less than expected, according to the Sunday Times.
Meanwhile, teenage soul singer Joss Stone has made it into a rich list of Britain's young music millionaires.
The 17-year-old from Devon has earned €7m since bursting on to the music scene.
She is one of the highest new entries in the rich list.
Charlotte Church, Coldplay, Daniel Bedingfield, Will Young and the Beckhams are also on the list.
To qualify as young music millionaires, entrants have to be aged 30 or under. At number one is Dhani Harrison, son of the late Beatle George Harrison, who has inherited a €203m fortune.
Second are the Beckhams - who qualify thanks to Victoria's former singing career - with €109m between them.
John Lennon's son Sean is the highest new entry at number three with a personal wealth of €29m
Coldplay's Chris Martin and fellow band members Jonny Buckland, Guy Berryman and Will Champion share fourth place with Ronan Keating and former Spice Girl Emma Bunton - each have a €14.5m fortune.
Singers Craig David and Will Young follow with €13m and €11.5m respectively.
Charlotte Church has €9m, as does new entry Denise Van Outen.
1: Clive Calder (€1.8 billion).
2: Paul McCartney (€1.2bn.)
3: Andrew Lloyd-Webber (€1bn.)
4: Cameron Mackintosh (€582 million).
5: Madonna and Guy Ritchie (€342m).
6: Robert Stigwood (€306m).
7: Elton John (€269m).
7: Sting (€269m).
9: Mick Jagger (€262m).
10: Tom Jones (€255m).
1: Dhani Harrison (€204 million).
2: David and Victoria Beckham (€109m).
3: Sean Lennon (€29m).
4: Guy Berryman (€14.5m).
4: Jonny Buckland (€14.5m).
4: Emma Bunton (€14.5m).
4: Will Champion (€14.5m).
4: Ronan Keating (€14.5m).
4: Chris Martin (€14.5m).