UEFA have fined Chelsea 27 million over violations of financial sustainability guidelines covering the fiscal periods ending in 2023 and 2024.
This follows the conclusion of their investigation into the Premier League club's financial dealings over recent seasons.
Apart from the 27m penalty, UEFA has hinted that the sanctions could escalate.
If Chelsea fail to comply with conditional financial thresholds in the near future, the club faces the risk of incurring an additional fine of 52m.
Aston Villa have also been punised, although their breach was deemed less severe.