G.R. No. 107994 - Philippine Agricultural Commercial and Industrial Workers Union vs. National Labor Relations Commission

The petitioner, Philippine Agricultural Commercial and Industrial Workers Union - TUCP (PACIWU-TUCP), is the exclusive bargaining agent for the rank-and-file employees of Vallacar Transit, Inc.
The dispute arises from the claim for 13th month pay for the bus drivers and conductors employed by Vallacar Transit, Inc.

The union filed a complaint with the NLRC Regional Arbitration Branch No. VI in Bacolod City seeking payment of the 13th month pay on behalf of its members.
The basis of the claim was that although the drivers and conductors are compensated on a commission basis, the Collective Bargaining Agreement (CBA) provides that they are automatically entitled to a guaranteed basic minimum pay—ensuring their earnings do not fall below the legal minimum for eight (8) hours of work.

Vallacar Transit, Inc. maintained that its drivers and conductors are paid on a “purely commission” basis and thus fall under the exempting provisions of paragraph 2 of the Revised Guidelines on the Implementation of the Thirteenth Month Pay Law.
The company further relied on Section 2 of Article XIV of the CBA, effective October 17, 1988, which explicitly states that drivers and conductors on a purely commission basis are not entitled to 13th month pay.
This argument was aimed at enforcing the contractual clause as the law between the parties.

On May 22, 1992, Labor Arbiter Reynaldo Gulmatico issued a decision dismissing the union’s complaint.
The dismissal was upheld by the National Labor Relations Commission (NLRC) when the union appealed the decision, and even the subsequent motion for reconsideration was denied.
These developments led to the filing of a petition for certiorari before the Supreme Court.

The case is anchored on the interpretation of Presidential Decree No. 851 (the "13th Month Pay" Law) and its subsequent guidelines and explanatory bulletins.
Memorandum Order No. 28 and MOLE Explanatory Bulletin No. 86-12 were cited, clarifying that employees earning both a fixed (guaranteed) wage and commission are entitled to the 13th month pay based on total earnings.
The factual matrix established that the commission system in question is not “purely commission,” since the drivers and conductors receive a guarantee ensuring a basic minimum wage if their earned commissions fall short.

Whether the bus drivers and conductors of Vallacar Transit, Inc., who are paid predominately on a commission basis but with a guaranteed minimum wage, are entitled to the 13th month pay as mandated by Presidential Decree No. 851.

Does the CBA’s clause excluding employees paid on a purely commission basis apply when a guaranteed minimum wage is provided?
Should the commission, when supplemented by a minimum wage guarantee, be considered an integral component of the employee’s total wages for computing the 13th month pay?
Is the interpretation of wage for the purposes of 13th month pay governed by the label under the contract or by the actual nature of the remuneration received?