Should PSG bid - and then pay - the money needed to sign Neymar from Barcelona, they would struggle to meet Uefa's financial fair play conditions that limit a team to losses of no more than €30m over a three-year cycle.
Neymar transfer talk: Spanish Primera Liga to file complaint against PSG
Spain's football league chief Javier Tebas said he will file a complaint with Uefa for financial fair play breaches against Paris Saint-Germain over their pursuit of Brazilian star Neymar.
PSG are rumoured to be weighing up a bid for the Barcelona forward at €222 million (Dh956.8m), enough to trigger the 25-year-old player's transfer release clause.
"La Liga will file this complaint because it's a problem for La Liga's competitiveness. Today it's happened to Barca, tomorrow it could happen to Real Madrid, it's happened to Atletico Madrid," Tebas, the Primera Liga chairman, told Mundo Deportivo.
Should PSG bid - and then pay - the money needed to prise Neymar from the Catalan capital, they would struggle to meet Uefa's financial fair play conditions that limit a team to losses of no more than €30m over a three-year cycle.
And that is despite a mega-money sponsorship deal with the Qatar tourism board.
According to Tebas, "no-one believes" the commercial revenue figures presented by PSG to justify their spending.
"PSG cannot have figures in which PSG's commercial rights exceed those of Real Madrid and Barcelona," Tebas said. "No-one believes that. We've carried out economic studies and it's impossible.
"It means that the Qatari state is injecting money and that violates Uefa's financial fair play rules and the European Union's norms of economic competition, and we're going to file a complaint."
In 2014, PSG were fined €60m and handed transfer spending restrictions by Uefa for breaching financial fair play rules.
Uefa's Club Financial Control Body (CFCB) has also stated that PSG's €200m-a-year image rights contract with the Qatari tourist board is inflated and double its "true value".
Earlier, PSG full-back Dani Alves has urged his fellow Brazilian Neymar to "be brave" when it comes to considering a potential world-record transfer to the Ligue 1 giants.
Former Barca man Alves, who moved to Paris from Juventus earlier this month, scored in PSG's Trophee des Champions victory over Monaco on Saturday and afterwards he discussed Neymar's situation.
"It's an important decision for him and it's the kind of decision men have to make. He's one of my best friends and I'll always want him by my side, but I cannot interfere," he was quoted in Marca as having said. "I helped him come to Barcelona, I did not make the decision for him, but I told him what Barcelona was like and he decided to move there. Decisions are for the brave and I am the bravest of all.
"I just want my friend to be happy wherever he is, although obviously if he were here that would be much better.
"It's a decision you have to make carefully but you have to be selfish. If I could advise one thing it would be: be brave, the world belongs to the brave."
Richard Jolly: Neymar could redraw map of European football with move
Neymar, 25, was heavily involved in Barca's 3-2 friendly victory over Primera Liga arch-rivals Real Madrid in Miami on Saturday but speculation over his future has continued to intensify in recent days.
He was pictured storming out of training following an angry confrontation with new teammate Nelson Semedo while another Brazilian playing for PSG, Thiago Silva, said details of a switch might emerge "soon".
Watch the fight
Barca defender Gerard Pique, who last week posted a picture of himself with Neymar on Instagram with the caption "se queda" - meaning "he stays" - has conceded he is unsure whether the forward will remain at Nou Camp heading into the 2017/18 season, claiming his online post was a "gut thing".
Gerard Pique's post
Following the Miami friendly at the Hard Rock Stadium new Barca manager Ernesto Valverde expressed his desire to keep Neymar on board as the Catalans look to reclaim their Spanish title from Madrid.
"I try to talk about what is happening right now," he said in quotes carried by Marca. "Neymar is here with us, we count on him and we think that he should help us out this year."
Madrid captain Sergio Ramos hopes he has faced Neymar - in a Barca shirt at least - for the "last time".
"I have a good relationship with him," the Spanish defender told Marca. "We changed shirts at the end and I hope that's the last time I get a Barca one from him, that wouldn't be a problem for us at all!
"He didn't tell me anything. Everyone is free to decide their own future.
"I think he is a great player and a key man for Barcelona - it's up to him to decide his future."