seniority calculation Belgium

Notice period in case of dismissal by employer

Seniority	Opzegtermijn
Less than 3 months	1 week
Between 3 and 4 months	3 weeks
Between 4 and 5 months	4 weeks
Between 5 and 6 months	5 weeks
Between 6 and 9 months	6 weeks
Between 9 and 12 months	7 weeks
Between 12 and 15 months	8 weeks
Between 15 and 18 months	9 weeks
Between 18 and 21 months	10 weeks
Between 21 and 24 months	11 weeks
Between 2 and 3 years	12 weeks
Between 3 and 4 years	13 weeks
Between 4 and 5 years	15 weeks
Between 5 and 6 years	18 weeks
Between 6 and 20 years	3 extra weeks per year of seniority started
Between 20 and 21 years	62 weeks
From 21 years up	1 week extra per year of seniority started

Notice period in case of dismissal by employee

Seniority	Opzegtermijn
Less than 3 months	1 week
Between 3 and 6 months	2 weeks
Between 7 and 12 months	3 weeks
Between 12 and 18 months	4 weeks
Between 18 and 24 months	5 weeks
Between 2 and 4 years	6 weeks
Between 4 and 5 years	7 weeks
Between 5 and 6 years	9 weeks
Between 6 and 7 years	10 weeks
Between 7 and 8 years	12 weeks
More than 8 years	13 weeks

From 8 years of seniority, the notice period for a voluntary departure of your employee is capped at 13 weeks.