Even though companies have specific company schedules and employees may have personalized schedules Teambook does not prevent planners to plan extra hours. 

Such overtime is considered as overscheduling and will be displayed by a red figure at the bottom of the daily booking, indicating the number of hours exceeding the regular hours.

This situation will appear when bookings are created (in the edit panel or by dragging in the planner board) and the sum of the bookings exceeds the number of hours available per day.

Alternatively, in the case of a day being already fully filled-up with bookings and hence not showing any "space left" to enter a booking, you can create an extra booking by clicking on the line just below that given day. A pop-up appears where you can add a booking and also edit the existing ones for that day.