Part-time employment is becoming increasingly popular in Polish businesses. Flexible forms of employment let employers match labour costs to their actual business needs and help employees balance work and private life. However, part-time work brings certain challenges in settling employee entitlements, especially when it comes to calculating annual leave.
Calculating leave correctly for part-time employees requires knowledge of the specific rules and procedures set out in the Labour Code (Kodeks pracy). Mistakes here may lead to incorrect working time settlements, problems during inspections by PIP (National Labour Inspectorate) and disputes with employees. That is why it is so important to understand all the nuances of calculating annual leave for people who work part-time.
Annual leave for part-time employees is settled on similar principles to leave for full-time employees. The key difference is the need to convert the leave entitlement in proportion to working time and to take the employee's length of service into account
Basic rules for calculating leave for part-time employees
The annual leave of a part-time employee is set in proportion to their working time. The calculation is based on the standard leave entitlement, which is 20 days for employees with less than 10 years of service and 26 days for employees with at least 10 years of service.
Calculating leave for a part-time employee involves several steps. First, determine the basic leave entitlement due to the employee based on their length of service. Then multiply it by the fraction corresponding to the employee's working time. The result is rounded up to a full day of leave.
An incomplete day of leave is always rounded up to a full day. This rule protects the employee's interests and gives them a full day of rest. However, the total leave in a given calendar year cannot exceed the basic entitlement of 20 or 26 days
Pay particular attention to situations where an employee changes employer several times during a calendar year. Each employer, when setting the employee's leave, rounds up to a full day. This may lead to a situation where the total leave exceeds the basic entitlement provided for by law.
The following example shows how these rules work in practice. An employee working 3/4 time whose length of service entitles them to 26 days of leave will have their leave calculated as follows: 3/4 × 26 days = 19.5 days. After rounding up, the employee is entitled to 20 days of annual leave.
When setting the annual leave of a part-time employee, always take into account the employee's length of service and periods of completed education. From 2026, documented periods of running a business and of performing contracts of mandate (umowa zlecenia) also count towards length of service (Article 302¹ of the Labour Code – in the public finance sector from 1 January 2026, for other employers from 1 May 2026). These elements determine the basic leave entitlement, which is then converted in proportion to working time
Detailed procedures for calculating leave
Calculating leave for part-time employees requires precise procedures that reflect the specific nature of part-time working time. The process consists of several key steps, which must be carried out in a set order.
- Determine the basic leave entitlement based on the employee's length of service
- Express the working time as a common fraction
- Multiply the basic leave entitlement by the working time fraction
- Round the result up to a full day
- Check that the calculated leave does not exceed the statutory limits
The key element of the procedure is determining the working time correctly. It should be expressed as a fraction, where the numerator is the employee's actual working time and the denominator is full-time working time. For example, an employee working 4 hours a day with a standard 8-hour working day has a working time of 1/2.
Part-time employees are granted annual leave on the days that are working days for them under their applicable working time schedule. When converting leave into hours, one day of leave equals 8 hours of work (Article 154² § 2 of the Labour Code), and for each day of leave the number of hours the employee was due to work on that day is deducted (Article 154² § 1)
These procedures can be illustrated by the example of an employee working 1/2 time, 4 hours a day from Monday to Friday. Under the basic entitlement, she is entitled to 26 days of leave a year. After conversion, she is entitled to 13 days of leave (1/2 × 26 = 13). In hours, she is entitled to 104 hours of leave a year (13 days × 8 hours = 104 hours).
When the employee requests 10 days of annual leave, it is settled using the hourly method. Ten working days multiplied by 4 hours (the employee's daily working time) gives 40 hours of leave used. The remaining balance is 64 hours (104 - 40 = 64).
Settling leave in hours
Settling leave in hours for part-time employees makes it possible to track leave used precisely. This method is particularly important for employees with an irregular working time schedule or with working time that changes during the year.
The basic principle of the hourly system is to convert the leave due into hours, assuming that one day of leave equals 8 hours of work. Then, when leave is granted, the number of hours corresponding to the employee's actual absence from work is deducted from the total hourly balance.
Leave is granted for the employee's working days but settled in hours. This means that the employee is given leave on the days on which they normally work, and the number of hours deducted from their balance corresponds to their daily working time on the given day – the 8-hour standard is used only to convert days of leave into hours
A particularly interesting example is an employee working 3/5 time, on Tuesdays, Wednesdays and Thursdays, for the standard daily working time. Under the basic entitlement, he is entitled to 20 days of leave a year. His leave in the calendar year is 12 days (3/5 × 20 = 12). His leave in hours is 96 hours (12 days × 8 hours = 96 hours).
When the employee requests 7 days of annual leave, 56 hours are deducted from his balance (7 days × 8 hours of daily working time = 56 hours). However, the employee himself will be away from work for two weeks plus one day in the third week, in line with the rule that leave is granted for days that are working days under the applicable working time schedule. Days are counted the same way when the employee takes leave during the notice period.
| Working time | Basic leave | Converted leave | Leave in hours | Example of use |
|---|---|---|---|---|
| 1/2 time | 26 days | 13 days | 104 hours | 5 days of 4 hours = 20 hours |
| 3/4 time | 20 days | 15 days | 120 hours | 8 days of 6 hours = 48 hours |
| 3/5 time | 20 days | 12 days | 96 hours | 7 days of 8 hours = 56 hours |
| 1/4 time | 26 days | 7 days | 56 hours | 3 days of 2 hours = 6 hours |
Change of working time during the year
A change in the employee's working time during the calendar year requires the leave entitlement to be recalculated. The Labour Code does not regulate this situation directly, but in practice the principle of proportional recalculation of leave entitlements has been adopted.
When working time changes, leave is calculated separately for each period of work with a different working time. The calculations follow the principle of proportionality, taking into account the actual length of each period of employment.
If the working time changes in the middle of a calendar month, the leave is recalculated from the beginning of the following month after the change. This approach simplifies settlements and keeps the calculation of leave entitlements transparent
These rules can be illustrated by the example of an employee entitled to 20 days of annual leave who worked 1/2 time from 1 January, and whose working time was increased to full time from 1 July. The leave is calculated as follows:
- For January to June: 20 days × 1/2 time = 10 days of basic entitlement, then 10 days × 6/12 = 5 days
- For July to December: 20 days × 6/12 = 10 days
The employee's total leave in this calendar year is 15 days. This approach ensures a fair settlement of leave entitlements in proportion to the actual working time in each period.
Pay particular attention to documenting changes in working time and their effect on leave entitlements. The employer should keep detailed records that make it possible to reconstruct how the leave was calculated in the event of an inspection or a dispute with employees.
First leave for part-time employees
Employees who take up their first job ever on a part-time basis are subject to special rules for acquiring the right to annual leave. The general rule of setting leave in proportion to working time also applies to a first part-time job.
Setting the leave of a person employed part-time for the first time involves two steps. First, determine the annual leave due to the employee in proportion to their working time. Then apply the rule that, in the first year of work, the right to leave is acquired at the end of each month of work, at 1/12 of the leave due after a year of work.
For a part-time employee in their first job ever, the leave calculation often gives a non-whole number. The Labour Code does not set out rounding rules for such cases directly, which leaves employers some freedom in interpreting the provisions
A practical example concerns an employee employed for the first time on 1 June on 1/2 time, working Monday to Friday, 4 hours a day. Because of part-time employment, the leave is 10 days (20 days × 1/2 time). For each month worked, the employee acquires the right to 0.83 days of leave (1/12 × 10 days).
The employee will acquire the right to the next leave on 1 January of the following year in proportion to working time, that is 10 days (20 days × 1/2). This solution ensures continuity of leave entitlements and fair treatment of employees regardless of when their employment started.
Where the leave calculation gives a non-whole number, employers may take one of two approaches:
- Rounding to a full day while keeping within the limit of the basic leave entitlement
- Calculating annual leave to the hour and minute in line with the originally set entitlement
Termination of employment during the calendar year
When employment of a part-time employee ends during the calendar year, leave entitlements must be settled in a specific way. The principle of proportionality is then applied to the leave, taking into account the actual period of employment.
Settling leave on termination involves several steps. First, calculate the annual leave resulting from the employee's working time, rounding an incomplete day of leave up to a full day. Then set the leave in proportion to the period of employment, where an incomplete day of leave is rounded up to a full day and an incomplete calendar month is also rounded up to a full month.
Proportional leave applies only to the leave due to the employee in the year in which the employment ends. It does not affect leave entitlements from previous years, which remain in full in line with the rules in force when they were acquired
A practical example concerns an employee employed under a fixed-term contract from 1 January to 31 August on 1/2 time, whose length of service entitles them to 20 days of annual leave a year. The leave is calculated as follows:
- Leave based on working time: 20 days × 1/2 = 10 days
- Proportion to the period of employment: 8/12 × 10 days = 6.67 = 7 days (after rounding up)
The employer rounds the employee's leave up to a full day, so it is ultimately 7 days. This approach ensures a fair settlement of leave entitlements in proportion to the actual period of employment.
A manufacturing company employed a worker on 1/2 time for 8 months of the calendar year. The employee's length of service entitled him to 26 days of leave. The leave was calculated as follows: 26 days × 1/2 time = 13 days, then 13 days × 8/12 = 8.67 days, which after rounding gave 9 days of leave. The employee had used 6 days of leave, so on termination he was entitled to pay in lieu of 3 days of unused leave.
Practical aspects of managing part-time employees' leave
Managing the leave of part-time employees effectively requires appropriate procedures and tools. Employers must take the specific nature of part-time work into account when planning leave, keeping records and settling pay.
A key element is keeping detailed records of each employee's leave entitlements. The records should contain information on working time, length of service, basic leave entitlement, converted leave and days of leave used. All changes in working time and their effect on leave entitlements should also be documented.
Planning leave for part-time employees requires taking their individual working time schedules into account. Leave is granted only on days that are working days for the employee. This means that an employee who works only on certain days of the week cannot be given leave on days on which they do not normally work.
Employers should implement IT systems that calculate leave for part-time employees automatically. Such solutions reduce the risk of calculation errors and ensure that the leave rules are applied consistently
Pay particular attention to situations where an employee combines several part-time employment relationships with different employers. Each employer sets and grants leave separately, in proportion to the working time with that employer, so the total number of days of leave under all contracts may exceed 20 or 26 days – the limit in Article 154 § 3 of the Labour Code applies to leave within a given employment relationship. When determining length of service for leave purposes, each employer counts the period of parallel employment with the other employer that falls before the next employment relationship began (Article 154¹ § 2 of the Labour Code).
- Keeping detailed records of each employee's leave entitlements
- Documenting all changes in working time and their effect on leave
- Taking individual working time schedules into account when planning leave
- Implementing IT systems to calculate leave automatically
- Regular training of HR staff on the leave rules
Most common mistakes in calculating leave
It is easy to make mistakes when calculating leave for part-time employees. Typical errors result from applying the proportionality rules incorrectly, rounding calculation results wrongly and failing to take changes in working time during the year into account.
One of the most common errors is determining the working time incorrectly. Employers sometimes confuse working time with the number of working hours or convert fractions incorrectly. For example, an employee working 6 hours a day with an 8-hour working day has a working time of 3/4 (that is, 6/8, or 0.75 as a decimal), not 0.6.
Another common mistake is rounding calculation results incorrectly. The rules state clearly that an incomplete day of leave is rounded up to a full day. Some employers wrongly round down or round mathematically to the nearest whole number.
Mistakes in calculating leave may lead to serious legal and financial consequences. Incorrect calculations may result in claims from employees, fines imposed by the National Labour Inspectorate (failing to grant leave due or reducing it without grounds is an offence under Article 282 § 1 point 2 of the Labour Code) and the need to pay additional pay in lieu of unused leave
Problems also arise when working time changes during the year. Employers often forget to recalculate leave entitlements or use incorrect calculation methods. Situations in which an employee changes their working time several times in a calendar year are particularly complicated.
Settling leave in hours incorrectly is another significant source of errors. Employers sometimes deduct 8 hours from the leave balance for each day of leave, even when the employee works shorter hours. Remember that the standard 8-hour day is used only to convert the leave entitlement into hours, and the number of hours deducted from the balance is the number of hours the employee was due to work on the given day under their working time schedule.
