Told Your Probationary Period Is Being Extended? How to Judge If It Is Lawful and What to Confirm

Extending a probationary period requires two things at once: a supporting provision in the work rules or employment contract, and a reasonable ground for the extension. Without a supporting provision, an employer cannot extend unilaterally.

Being told your probation is being extended naturally raises the fear that you will not be kept on. The useful first move is to separate whether the extension is lawful from what you should be asking for.

Two Conditions Must Be Met

Extending probation means prolonging a state in which the employer holds a broad reserved right to terminate. Because that is disadvantageous to the employee, it cannot be done at the employer's discretion alone.

Condition One: A Supporting Provision in the Work Rules

The work rules or the employment contract must contain a provision stating that the probationary period may be extended. Where no such provision exists at all and the employer notifies you of an extension unilaterally, that extension is in principle void. Start by checking the work rules. Employers are required by law to keep work rules accessible to employees at all times, so a request to see them will not be refused.

Condition Two: A Reasonable Ground for the Extension

A supporting provision does not by itself permit extension at will. Extensions are most readily upheld where the employer would otherwise have declined to confirm the employment, and extends instead in order to give the employee a further opportunity. An extension driven purely by the employer's convenience, such as holding down payroll costs or deferring a decision, may be found to lack reasonableness. The length of any extension is likewise confined to what is socially reasonable.

Five Things to Confirm When You Are Told

There is no need to respond on the spot. Confirm these five points, in writing or by email where possible.

1. The supporting provision: Which article of the work rules is the extension based on? If there is no provision, the validity of the extension itself is in question.
2. The reason for the extension: What has been judged lacking? If the answer amounts to no more than "we would like to observe you a little longer," criteria may not exist at all.
3. The new period and its end date: An open-ended extension with no stated end date is a problem. Get a specific date.
4. The criteria for confirmation: What must you satisfy during the extension to be kept on? Whether you can get this in writing tells you more about the employer's posture than anything else.
5. Pay during the extension: Does the lower probationary rate simply continue? Confirm the figure at the point you are notified.

The fourth point matters most. Once criteria are stated, the extension stops being a waiting period and becomes a period for improvement. Conversely, an employer that announces an extension without setting out criteria may in substance be doing nothing more than deferring the decision.

An Extension Is Not Necessarily Bad News

Being notified of an extension tends to read as dismissal in all but name. Seen from the employer's side, though, it has the opposite aspect as well. Choosing not to decline confirmation, which would end the employment, and instead to give one more opportunity, also takes the form of an extension. In practice, this is the type of extension courts are most willing to uphold.

So moving straight to planning your exit the moment you are told is premature. Ask for the reason and the criteria first, and gauge whether what is being asked of you is something you can address. If there is no realistic prospect of improvement, or if no criteria are forthcoming at all, that is the point at which starting to look elsewhere becomes the sound judgment.

Can You Refuse an Extension?

Where a supporting provision exists and the reason is reasonable, it is difficult in practice to sustain the position "I decline the extension but will remain employed." On the other hand, where there is no supporting provision, you can contest the validity of the extension itself. In that case there is room to treat your employment as having been confirmed at the end of the original probationary period. If you intend to argue the point, assemble the relevant article of the work rules and a record of the extension notice, then consult the Labour Standards Inspection Office or a qualified professional.

Note also that an employer cannot freely dismiss you on the spot for refusing an extension. Dismissal during probation is given somewhat wider latitude than usual, but objective grounds and proper procedure are still required.

How to Proceed After You Are Notified

1. Neither accept nor refuse on the spot; say that you would like to review the details and ask for them in writing
2. Check the extension provision in the work rules and note the relevant article
3. Ask by email about the reason, the period, the criteria for confirmation, and the treatment of pay
4. On the strength of the reply, decide whether to work on the improvements, or to start looking elsewhere in parallel

Common Questions About Extending a Probationary Period

How many times can a probationary period be extended?

No law fixes a number. That said, the longer the probationary period runs through repeated extensions, the harder reasonableness becomes to establish. Where the work rules set a cap on extensions, the employer cannot go beyond it.

Does an extension mean I probably will not be confirmed?

Extensions are often made precisely in order to give an opportunity rather than decline confirmation, so in that sense they are closer to an indication of intent to continue. It is equally true, however, that your current performance has been judged insufficient. The priority is to ask about the criteria and identify concretely what needs to improve.

Will my pay stay low during the extension?

It depends on the notice of working conditions and the work rules. The probationary rate frequently continues to apply, so confirm the figure at the point you receive the extension notice.

The extension was only communicated verbally.

A verbal notice can still take effect, but it leaves you unable to establish what was said if a dispute arises later. Sending an email along the lines of "regarding the extension you mentioned the other day, could you confirm the period and the reason" preserves the exchange as a record.

Summary: Check the Provision and the Criteria

An extension is permissible only where a provision in the work rules and a reasonable ground are both present. A unilateral extension with no supporting provision is open to challenge, and even with a provision, an extension serving only the employer's convenience lacks reasonableness. When you are notified, begin by confirming the supporting provision and the criteria for confirmation in writing or by email rather than verbally.

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.