Anthony Joshua is set to take a £13 million purse with Joseph Parker taking £7 million as the pair prepare for a potential fight at Cardiff's Principality Stadium at the end of March 2018, according to The Sun.
Negotiations are nearing an end as the IBF and WBA heavyweight champion Joshua will battle with Parker for the WBO title.
The 28-year-old BBC Sport's Personality of the Year nominee fought Carlos Takam in November at the same venue winning £10 million after taking the Cameroonian-Frenchman to 10 rounds to preserve his 100% record of wins and knockouts in the ring.
80,000 watched that fight at the Principality in November 2017, a similarly fiery atmosphere is expected with a bout between Joshua and 25-year-old Parker.
The Kiwi took Hughie Fury to 12 rounds at the Manchester Arena to retain his record of 24 wins from 24 fights, 18 of those via knockout.
Fury was awarded £750,000 while Parker took home £1.1 million from that bout. The latter's £7 million he would earn would from a fight with Joshua would the Aucklander's record purse to date.
A spokesperson admitted: “A contract has been sent to Parker’s team in New Zealand and Matchroom are waiting for it to be signed and returned to London.
“Some minor details have yet to be agreed but no one is anticipating too much trouble in getting the fight over the line.”
Parker’s promoter, David Higgins of Duco Events, said: “We’re really, really close. We’ve agreed the most important thing which is the ratio. The rest should flow from there.
“The Joshua side have made a small compromise on the purse ratio and we have agreed between 30 and 35 per cent.
“Both camps are happy and that is the most important part of the deal. I requested the same contract as Klitschko v Joshua. I even found a lawyer in London who acted for Klitschko on that deal," Higgins added.
“There are key things to work out. We are discussing rematch clauses. If Joe wins, we have secured 55 per cent for him. If Joe loses, we’d like some rematch or downside cover.”
Other potential opponents for in 2018 for Joshua, who attended prisons over Christmas week, have included American Deontay Wilder while for Parker a fight with Japan's Kyotaro Fujimoto has been on the cards.
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