Probationary Period vs Regular Employment: What Happens When Probation Expires

The line between probationary and regular employment is one of the most consequential in Philippine labor law. When an employee finishes a probationary period, the law does not leave their status to the employer's discretion — regularization follows as a matter of right. The Supreme Court's decision in Mitsubishi Motors Philippines Corporation v. Chrysler Philippines Labor Union (G.R. No. 148738, June 29, 2004) clarifies exactly when that transition happens, how the six-month period is counted, and what an employer must prove to justify terminating a probationary employee.

The Facts of the Case

Nelson Paras worked for Mitsubishi Motors Philippines Corporation (MMPC) as a manufacturing trainee on a probationary basis starting May 27, 1996. During orientation, MMPC informed him of the company standards for regularization, including its performance evaluation system.

After six months, Paras's immediate supervisors rated his performance as average and told him he would be regularized. However, when department and division managers reviewed the evaluation, they concluded his performance was unsatisfactory. On November 26, 1996 — the 183rd day of his employment — Paras received a notice terminating his services for failing to meet company standards for regularization.

The labor union challenged the dismissal, arguing that Paras had already become a regular employee because his probationary period had expired.

The Issue: When Does Probation End?

The central question was whether Paras was still a probationary employee when he was terminated, or whether he had already become regular.

MMPC argued that the six-month period should be counted by calendar months, which would place the expiry on November 27, 1996 — one day after the termination notice was served. Paras and the union argued that six months equals 180 days under Article 13 of the Civil Code, placing the expiry on November 23, 1996.

The Ruling: Six Months Means 180 Days

The Supreme Court sided with the employee. Under Article 13 of the Civil Code, months not designated by name are understood to consist of 30 days each. Six months therefore equals 180 days. In computing a period, the first day is excluded and the last day included.

Since Paras started work on May 27, 1996, his 180-day probationary period ended on November 23, 1996. The termination notice served on November 26, 1996 came three days after regularization had already taken effect. Under Article 281 of the Labor Code, an employee who is allowed to work beyond the probationary period becomes a regular employee.

The Dismissal Was Illegal

Once Paras became a regular employee, he could only be dismissed for just or authorized causes under the Labor Code, and only after due process. The Court found that MMPC failed to prove a valid ground.

An unsatisfactory rating justifies dismissal only if it amounts to gross and habitual neglect of duties — a high standard requiring reckless disregard for safety or property. The records showed no such gross negligence. Notably, Paras's immediate supervisor had initially rated him average and even told him he would be regularized. The sudden reversal by higher management, without informing Paras of any basis for the change, deprived him of due process.

The Court described the termination as an attempt to "deodorize" an illegal dismissal.

Reinstatement and Backwages Modified

The Court affirmed that Paras was illegally dismissed and entitled to backwages. However, it modified the reinstatement order because MMPC had validly retrenched approximately 700 employees in February 1998 due to proven business losses. Since Paras would have been among the most recently hired, he would have been retrenched anyway.

The Court ordered MMPC to pay full backwages from the date of dismissal up to March 25, 1998, plus separation pay under Article 283 of the Labor Code — one month's salary or one-half month pay per year of service, whichever is higher.

Practical Takeaways

• Probationary periods are strictly counted: Six months means 180 days under Article 13 of the Civil Code, not six calendar months. The first day of work is excluded; the last day is included.
• Regularization is automatic: An employee who works beyond the probationary period becomes regular by operation of law under Article 281 of the Labor Code, regardless of the employer's intention.
• Employers must act before expiry: A termination notice served after the 180th day treats the employee as regular, requiring just or authorized cause and due process.
• Unsatisfactory ratings need real proof: Poor performance justifies dismissal only if it amounts to gross and habitual neglect — a high threshold that employers must substantiate.
• Employers bear the burden of proof: In illegal dismissal cases, the employer must prove both the validity of the cause and compliance with due process.

This article is general information and not legal advice. For your specific situation, consult a lawyer or ask ASG Legal AI.