Lionel Messi is set to sign his new Barcelona contract 'sooner rather than later', but the Primera Division club are preparing to get inventive in order to pay the Argentina star his massive wages. 

​​Sport report that the Catalan giants have had to make a 'huge economic effort' to offer Messi the terms he has demanded to keep him at the Camp Nou for the long-term, structuring the deal in a specific way in order to avoid spending the allowed 70% of their revenue on first-team wages. 

Brasil Global Tour - Brazil v Argentina

The player's agent and father Jorge Messi has been holding 'discreet' talks with club president Josep Maria Bartomeu over the renewal, leading to a situation where Messi will be paid a 'renewal bonus' as part of the restructured deal. 

The club have already paid similar bonuses to Neymar, Sergio Busquets and Javier Mascherano, with an economic report of the club's 2015/16 season reading: "In addition, after June 30, 2016 and prior to the preparation of these annual accounts, the club has formalised the renewal of three contracts of first team players who have been awarded a signing bonus of €64m."

The newspaper report that Messi's bonus alone will be an eye-watering €50m, almost matching alone what the club's three other stars made cumulatively. 

It is as yet unclear whether the fee will be paid as one lump sum or in instalments over the course of the contract, but the amount will be split in accounts across the length of the deal - much in the same way that transfer fees are accounted. 

For more from Chris when he's not writing on 90min, follow him on Twitter at @ThatChris1209