Nothing! Only the amounts you have consumed will be removed from your payroll.
As soon as your company closes for the month, the limits will return to the maximum and the accumulated consumption will be reset to zero.
Consume as you want, where you want - no need to make monthly forecasts! 😉
Although, if you want, you can accumulate the money you do not consume and carry them over to the following month to take full advantage of the tax benefits of flexible remuneration.