Paris St-Germain is one of eight clubs to be fined by European football's governing body, Uefa, for breaching Financial Fair Play rules.
PSG have been ordered to pay an unconditional 10m euros (£8.6m) for not complying with "break-even" rules and could pay as much as 65m euros (£56.3m) depending on future compliance.
The break-even requirement is where clubs are ordered to not spend more than the income that they generate, and that they must balance their books over the course of three years.
Uefa told 19 other clubs they will be "monitored closely" in coming years.
They include Chelsea, Leicester, Manchester City, West Ham and Rangers.
The sanctions applied to clubs who played in Uefa's 2021-22 club competitions and came after analysis of the financial years 2018, 2019, 2020, 2021 and 2022.