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Work Seniority Calculator
This work seniority calculator computes the total length of employment based on a start and end date. It shows full years, months and remaining days, and determines the annual leave entitlement under Polish Labour Code Article 154: 20 days/year for seniority under 10 years, or 26 days/year for seniority of 10 years or more.
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How we calculate work seniority
Seniority is the difference between the end date (or today) and the start date. We first count full years, then full months from the remainder, and the rest are days. Annual leave entitlement follows Article 154 of the Polish Labour Code: < 10 years = 20 days/year, ≥ 10 years = 26 days/year. Periods of education may also count towards leave seniority.
Example: employed from 1 January 1995 to today
An employee hired on 1 January 1995 and working until 9 June 2026 has a seniority of 31 years, 5 months and 8 days (approx. 11,482 days). Since seniority exceeds 10 years, the employee is entitled to 26 days of annual leave per year.
Frequently asked questions
The calculator computes seniority based on the dates provided, without accounting for unpaid leave, employment gaps or additional educational periods. The result is indicative — consult your HR department or a legal advisor for formal decisions.
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