Your payroll account might have exemptions because your company has an agreement with the bank, but that doesn't mean all services are free.
Key points
Ask about card fees, withdrawals from other banks, account statements, transfers, and account fees after your employment ends.
The most important question is: what happens to the fees if your salary stops being deposited?
This will likely change the account's cost.
The figures, fees and limits in this answer vary by bank and change over time — confirm them with your bank or the official source before acting.