Clubs are expected to find out later today whether they have been charged under the Premier League's profitability and sustainability regulations (P&S).
Everton and Nottingham Forest are thought to be the clubs most at risk.
In November, Everton were deducted ten points - the largest sanction in the history of the Premier League - for a breach of the Premier League's profit and sustainability rules. The club are club are appealing against their punishment.
FFP/P&S explained: What limits clubs spending more?
In the simplest terms, when every Premier League team tots up their annual accounts, they can have made a loss no greater than £105m across the previous three seasons.
Clubs can only lose £15m of their own money across those three years. So that's no more than £15m extra on outgoings like transfer fees, player wages and, in a lot of clubs' cases, paying off former managers compared to their income from TV payments, season tickets, selling players and so on.
The other £90m of any £105m must be guaranteed by their owners buying up shares, known as 'secure funding', and essentially means bankrolling the club.