In the Philippine legal hierarchy, labor is not merely a contractual commodity but a "primary social economic force." This status is enshrined in the 1987 Constitution and fortified by a robust body of statutes and jurisprudence designed to redress the inherent inequality between capital and labor.

I. The Constitutional Foundation

The 1987 Philippine Constitution serves as the bedrock for all labor protections. It moves beyond mere recognition of rights, actively mandating the State to protect and promote the welfare of workers.

1. State Policies and Principles

Article II, Section 18: Explicitly affirms labor as a primary social economic force and mandates the State to protect the rights of workers and promote their welfare.
Article II, Section 10: Promotes social justice in all phases of national development.

2. The "Magna Carta" of Labor (Article XIII, Section 3)

The most significant constitutional provision is Article XIII, Section 3, which guarantees the following rights to all workers:

Self-Organization: The right to form unions and associations.
Collective Bargaining and Negotiations: The right to negotiate terms and conditions of employment.
Peaceful Concerted Activities: Including the right to strike in accordance with the law.
Security of Tenure: Protection against dismissal without just or authorized cause.
Humane Conditions of Work: Safe and healthy working environments.
A Living Wage: Compensation sufficient to support a family in dignity.
Participation in Decision-Making: The right to participate in policy and decision-making processes affecting their rights and benefits.

II. The Labor Code of the Philippines (Presidential Decree No. 442)

While the Constitution provides the framework, the Labor Code (as amended) provides the mechanics of enforcement. It governs all employee-employer relations, divided into several "Books" covering recruitment, conditions of work, health and safety, and labor relations.

The Four-Fold Test

To invoke labor protections, an employer-employee relationship must exist. Philippine courts apply the "Four-Fold Test" to determine this:

Selection and engagement of the employee.
Payment of wages.
Power of dismissal.
Power of control (the most important element)—the employer’s right to control not only the end result but also the means and methods used to achieve it.

III. Security of Tenure

In the Philippines, an employee cannot be terminated except for a Just Cause or an Authorized Cause.

1. Just Causes (Article 297)

These are grounds based on the employee's fault:

Serious misconduct or willful disobedience.
Gross and habitual neglect of duties.
Fraud or willful breach of trust.
Commission of a crime against the employer or their family.

2. Authorized Causes (Articles 298-299)

These are grounds based on business or health necessity:

Installation of labor-saving devices.
Redundancy.
Retrenchment to prevent losses.
Closure or cessation of operation.
Disease (if continued employment is prohibited by law or prejudicial to health).

3. Due Process Requirement

Termination requires "Twin Notice" due process:

First Notice: Detailing the grounds for termination and giving the employee an opportunity to explain (an administrative hearing may be required).
Second Notice: Formally notifying the employee of the decision to dismiss after considering their defense.

IV. Labor Standards and Social Legislation

The law sets the "floor" for benefits that cannot be waived by the employee through a contract.

Benefit	Description
Minimum Wage	Set by Regional Tripartite Wages and Productivity Boards.
Holiday Pay	100% of regular daily rate even if unworked; 200% if worked (Regular Holidays).
13th Month Pay	Mandatory for all rank-and-file employees (P.D. 851).
Service Incentive Leave	5 days of paid leave for employees with at least one year of service.
Maternity/Paternity Leave	105 days for mothers (RA 11210) and 7 days for fathers (RA 8187).
Night Shift Differential	Not less than 10% of regular wage for work between 10 PM and 6 AM.

Social Security System (SSS), PhilHealth, and Pag-IBIG

Employers are legally mandated to register employees and remit contributions to these funds, providing a safety net for disability, sickness, old age, and housing.

V. Labor Relations and Unions

The State promotes Tripartism—the joint participation of workers, employers, and the government in labor policy-making.

Right to Self-Organization: All persons employed in commercial, industrial, and agricultural enterprises and in religious, charitable, medical, or educational institutions (whether for profit or not) have the right to self-organization.
Unfair Labor Practices (ULP): Acts that violate the right of workers to self-organize, such as interfering with union formation or discriminating against union members.

VI. The Principle of Liberal Construction

A unique feature of Philippine labor law is the mandate found in Article 4 of the Labor Code:

"All doubts in the implementation and interpretation of the provisions of this Code, including its implementing rules and regulations, shall be resolved in favor of labor."

This is the principle of In Dubio Pro Operario. Because the worker generally possesses fewer resources than the employer, the law tilts the scales to ensure "compassionate justice."

VII. Dispute Resolution

Labor disputes are primarily handled by the National Labor Relations Commission (NLRC).

Mandatory Conciliation-Mediation (SEnA): Before a formal case is filed, parties undergo a 30-day conciliation process to reach an amicable settlement.
Labor Arbiter: If SEnA fails, the case is raffled to a Labor Arbiter for compulsory arbitration.
Appeals: Decisions of the Labor Arbiter are appealable to the NLRC Commission, then to the Court of Appeals (via Rule 65), and finally to the Supreme Court.