Visse af disse tillæg fastsættes ved de kollektive forhandlinger og betales for arbejde, der afviger fra en normal arbejdssituation, fx i form af forringet arbejdsmiljø.
These may take the form of fixed sums (D.Crowns/time unit) or as percentages of the normal wage, and may be paid for work which deviates from the "normal" work situation, eg. in terms of work en vironment or responsibility.