Going into a money deficit

What happens if your money balance becomes negative e.g. I pay my players a match bonus of more than I actually have, will I immediately be sacked as manager or will my balance just become negative until I get enough income to get a positive balance?
If you haven't enough money to pay the match bonus, it is just not paid, and your players have no quality bonus.
You can't run out of money.
Thanks for clarifying!