Probationary Periods by Employment Type: Permanent, Fixed-Term and Part-Time Compared

A probationary period can be applied to any employment type, and the legal rules that govern it, covering minimum wage, social insurance, paid leave, and dismissal notice, do not change between permanent staff, fixed-term staff, and part-time workers. What does change is the customary length, and the legal character of how the employment ends.

This article compares how probationary periods work across employment types, and clarifies the distinction that causes the most trouble in practice: a probationary period versus a fixed-term employment contract.

Four Rules That Do Not Change With Employment Type

As a starting point, the following four apply equally to permanent staff and to part-time workers. If you are told any of them does not apply because you are part-time, that statement is wrong.

1. Minimum wage: The prefectural minimum wage applies to every employment type.
2. Social insurance: If you meet the enrollment requirements, including working hours, you are enrolled from your first day regardless of employment type.
3. Annual paid leave: Accrues after six months of continuous service from your start date, with the probationary period counting toward it. Where scheduled days per week are few the entitlement is prorated, but the fact that it accrues at all is common to everyone.
4. Dismissal notice: Once you have worked beyond 14 days from your start date, 30 days' notice or payment in lieu is required.

Permanent Staff

Three months is the most common length, followed by six. Throughout the period the employer holds a broad reserved right to terminate, and decides at the end whether to confirm the employment. Declining to confirm is known as a refusal to confirm employment, and amounts in law to a dismissal.

Fixed-Term Staff: Better Protected Than You Might Expect

This is not widely known, but dismissing someone partway through a fixed-term contract is subject to a stricter test than dismissing someone on an indefinite contract. The Labor Contracts Act requires unavoidable circumstances for dismissal during the term of a fixed-term contract, and that bar is regarded as higher than the ordinary test for dismissal. Where you are hired as fixed-term staff and a probationary period sits on top of that, you still receive this protection.

Expiry of the contract term is a separate matter, however, and is not a dismissal. For fixed-term staff, then, the risk lies less in the assessment during the probationary period than in whether the contract is renewed.

Part-Time Workers

One to three months is typical, and reducing the hourly rate by a modest margin during the period is widely practised. This is lawful provided it was disclosed in advance and stays above minimum wage.

A frequent misconception is that part-time workers can be let go at any point during a probationary period. In fact the dismissal notice rules apply here too, and objective grounds are still required.

Dispatched Work Has No Probationary Period as Such

For dispatched workers, the employer is the dispatching agency; there is no employment contract with the client company. It therefore does not follow that the client sets a probationary period and makes an assessment. In temp-to-perm arrangements the dispatch period functions in substance as a mutual evaluation window, but its legal character is distinct from a probationary period.

The Point That Matters Most: Probation Versus Fixed Term

The arrangement that causes the most trouble in practice is "fixed-term staff for the first six months, then conversion to permanent." This is not a probationary period; it is a conversion scheme layered on top of a fixed-term employment contract. The legal character of how each one ends is entirely different.

• With a probationary period: An indefinite employment contract is already in force from your first day. Ending it requires the procedure and grounds for dismissal.
• With a fixed term plus conversion: Once the term expires, the employment ends simply by the employer choosing not to renew. Where an expectation of renewal has arisen you are protected, but on a first contract that is difficult to establish in practice.

To tell them apart, look at the contract term field on your notice of working conditions. If it reads "no fixed term" with the probationary period noted separately, it is the former; if it reads "fixed term, until [date]," it is the latter. Even if you are told verbally that it is "something like a probationary period," what is written on the document determines the legal treatment.

Checking Before You Join, Whatever the Employment Type

Under any employment type, a probationary period is a period during which you are assessed after joining. A trial career change lets you work at the actual workplace before committing, receive compensation for that work, and decide on that basis. Before agonising over the differences between employment types, there is also the option of establishing first whether the workplace suits you.

Common Questions About Probationary Periods by Employment Type

Do part-time roles have probationary periods?

They do, typically running one to three months. Minimum wage and the dismissal notice rules apply in the same way as they do to permanent staff.

Is a probationary period riskier for fixed-term staff than for permanent staff?

As far as dismissal partway through the term is concerned, fixed-term staff are protected by a stricter test. Non-renewal at the end of the term is not a dismissal, however, so that is where the attention should go.

I was put on a part-time contract for the probationary period only.

In that case it is not a probationary period; you have entered into a different employment contract. If you joined on the basis of an offer of permanent employment, this may amount to a discrepancy in terms. Compare the offer letter against the notice of working conditions and ask for an explanation.

Do part-time workers get paid leave?

They do. It accrues once you satisfy the six-month continuous service and attendance rate requirements. The number of days is prorated according to scheduled working days per week, but the claim that part-time workers have no paid leave is incorrect.

Summary: The Difference Lies in How It Ends

The basic rights that apply during a probationary period do not vary by employment type. Where differences do appear is in the customary length, and in the legal character of how the employment comes to an end. Confusing a probationary period with a fixed term plus conversion in particular means misjudging the scale of the risk, so always confirm the position from the contract term field on your notice of working conditions.

This article sets out general principles under Japanese law. Individual cases turn on their own facts, so for a specific dispute please consult the Labour Standards Inspection Office or a qualified professional such as a lawyer.