The Philippine legal framework grants employees robust protection under the 1987 Constitution, Article XIII, Section 3, which mandates full protection to labor, security of tenure, just and humane conditions of work, and a living wage. These constitutional guarantees are implemented primarily through the Labor Code of the Philippines (Presidential Decree No. 442, as amended), Republic Act No. 8042 (Migrant Workers and Overseas Filipinos Act of 1995, as amended), Republic Act No. 7877 (Anti-Sexual Harassment Act of 1995), Republic Act No. 10911 (Anti-Age Discrimination in Employment Act), and various Department Orders of the Department of Labor and Employment (DOLE). An employee may file a labor complaint whenever an employer violates these rights, whether through dismissal, non-payment of benefits, unsafe conditions, discrimination, or any other act that infringes upon statutory or contractual obligations.

Grounds for Filing a Labor Complaint

Philippine jurisprudence and the Labor Code recognize a broad spectrum of actionable violations. The most common grounds include:

Illegal or Unjust Dismissal
An employee enjoys security of tenure under Labor Code Article 279 (as renumbered). Dismissal is illegal unless supported by (a) just cause (serious misconduct, willful disobedience, gross negligence, fraud, crime against the employer, or analogous causes) or (b) authorized cause (installation of labor-saving devices, redundancy, retrenchment, closure of business, or disease), and due process is observed. Due process requires two written notices and an opportunity to be heard (twin-notice rule). Constructive dismissal—when continued employment becomes intolerable due to demotion, harassment, or unreasonable transfer—is also treated as illegal dismissal.
Monetary Claims
Employers must comply with minimum wage (Regional Tripartite Wages and Productivity Boards), overtime pay (125% on ordinary days, 200% on rest days/holidays), holiday pay, night-shift differential (10% additional for work between 10 p.m. and 6 a.m.), 13th-month pay (Republic Act No. 6982), service incentive leave (five days per year), separation pay, retirement pay (Republic Act No. 7641), and other benefits under collective bargaining agreements (CBAs) or company policy. Non-remittance of mandatory contributions to the Social Security System (SSS), Philippine Health Insurance Corporation (PhilHealth), Home Development Mutual Fund (Pag-IBIG), and Employees’ Compensation Commission also constitutes a valid ground.
Unfair Labor Practices (ULP)
Labor Code Article 248 enumerates prohibited acts such as interference with the right to self-organization, discrimination against union members, refusal to bargain collectively, company unionism, and acts that violate the duty to bargain in good faith. These apply primarily in unionized workplaces but may extend to certain non-union settings.
Occupational Safety and Health Violations
Failure to provide a safe and healthful workplace, adequate personal protective equipment, proper machine guarding, or compliance with DOLE Occupational Safety and Health Standards (Department Order No. 13, as amended) entitles employees to file complaints. Republic Act No. 11058 further strengthens enforcement and imposes stiffer penalties.
Discrimination and Harassment
Discrimination based on age, sex, gender, pregnancy, marital status, disability, religion, or political affiliation is prohibited. Sexual harassment (RA 7877) and gender-based violence are grounds for both administrative and criminal complaints. Retaliatory acts against employees who report violations or exercise protected rights are likewise actionable.
Breach of Employment Contract or Company Policy
Failure to honor agreed salaries, benefits, promotions, or job security clauses in individual contracts or CBAs gives rise to a cause of action.
Special Cases for Overseas Filipino Workers (OFWs)
Under RA 8042, as amended by RA 10022, OFWs may file complaints for illegal deployment, contract substitution, underpayment, maltreatment, or repatriation issues against recruitment agencies or foreign employers (with solidary liability of the local agency).
Other Violations
These include non-compliance with probationary employment rules (maximum six months, with written notice of regularization or termination), project employment limitations, and violations of special laws such as the Magna Carta for Persons with Disabilities or the Solo Parents Welfare Act.

Prescriptive Periods

Timeliness is critical:

Monetary claims arising from employer-employee relations prescribe after three (3) years from the time the cause of action accrues (Labor Code, Article 291, as renumbered).
Actions for illegal dismissal and reinstatement are generally governed by the four-year prescriptive period under Article 1144 of the Civil Code (actions upon an injury to the rights of the plaintiff), although courts encourage prompt filing.
Unfair labor practice cases must be filed within one (1) year from the time the act was committed in certain interpretations, but the prevailing view aligns them with the general labor prescriptive rules when coupled with monetary claims.
Criminal actions (e.g., for willful non-payment of wages under Article 288) follow the Revised Penal Code periods.

Failure to file within the prescriptive period results in the claim being forever barred.

Mandatory Conciliation: The Single Entry Approach (SENA)

Before any formal complaint may be filed with the National Labor Relations Commission (NLRC) or DOLE Regional Offices, the employee must first seek assistance under the Single Entry Approach (SENA), institutionalized by DOLE Department Order No. 151-16 and reinforced by Republic Act No. 10396. The employee submits a Request for Assistance (RFA) at any DOLE Regional Office, Field Office, or through the online SENA platform. A neutral conciliator-mediator conducts proceedings within 30 calendar days. If no settlement is reached, a Certificate of Non-Settlement or Referral is issued, allowing the employee to proceed to the appropriate forum. SENA is mandatory for most cases; exceptions include pure OFW deployment violations before the Philippine Overseas Employment Administration (POEA, now part of the Department of Migrant Workers), certain criminal complaints, and intra-union disputes.

Where and How to File

Jurisdiction is divided as follows:

DOLE Regional Offices – Handle labor standards enforcement, occupational safety inspections, small monetary claims (through summary proceedings), and SENA.
National Labor Relations Commission (NLRC) – Original and exclusive jurisdiction over illegal dismissal, unfair labor practices, money claims exceeding the DOLE threshold, claims for damages, and all termination disputes. Complaints are filed before the appropriate Regional Arbitration Branch (RAB) where the workplace is located or where the employee resides.
Department of Migrant Workers (DMW) – For OFW-related disputes.
Bureau of Labor Relations (BLR) – Limited role in registration and certain union-related employer interference cases.
Civil Courts – Only for tort damages or criminal cases outside labor jurisdiction (e.g., estafa by an employer).
Commission on Human Rights or regular courts – For constitutional rights violations that are not purely labor in character.

The complaint must be in writing, under oath, and contain the following: names and addresses of parties, a brief statement of the facts, the reliefs sought, and supporting documents (employment contract, payslips, termination notice, etc.). No filing fee is required for labor cases.

Available Remedies and Reliefs

Successful complainants may be awarded:

Reinstatement without loss of seniority rights plus full backwages from the date of dismissal until actual reinstatement (or separation pay in lieu of reinstatement when strained relations exist).
Payment of all unpaid wages, benefits, and allowances.
Moral and exemplary damages when the dismissal was attended by bad faith, fraud, or oppression.
Attorney’s fees equivalent to 10% of the total monetary award.
Fines and penalties against the employer for violations of labor standards.
In ULP cases, cease-and-desist orders and bargaining orders.

Burden of Proof and Due Process

In illegal dismissal cases, the employer bears the burden of proving that the dismissal was for a valid cause and that due process was observed. The employee need only prove the fact of dismissal. This doctrine of “management prerogative” is always balanced against the employee’s constitutional right to security of tenure.

Appeal Process

Decisions of Labor Arbiters may be appealed to the NLRC within 10 calendar days. NLRC decisions may be challenged before the Court of Appeals via Rule 65 certiorari within 60 days, and ultimately to the Supreme Court. Execution pending appeal is allowed in illegal dismissal cases upon posting of a bond by the employer.

Special Considerations

Probationary Employees: May be terminated only for just cause or for failure to meet the standards made known at the time of engagement.
Project, Seasonal, and Casual Employees: Entitled to security of tenure during the project or season; repeated rehiring may convert employment to regular status.
Unionized Workplaces: Grievance machinery under the CBA must first be exhausted before resorting to the NLRC, except in termination cases.
Government Employees: Civil Service Commission rules apply; labor complaints are filed differently.
Retaliation and Whistleblower Protection: Any adverse action taken because the employee filed a complaint or testified in a labor proceeding is itself a separate ULP or illegal dismissal ground.

Philippine labor law is deliberately protective of the employee as the weaker party. Courts consistently resolve doubts in favor of labor (Labor Code, Article 4). Employers found liable face not only civil liability but possible criminal prosecution, administrative sanctions, and blacklisting from government contracts. Employees who believe any of the foregoing grounds exist are therefore encouraged to act promptly by availing of SENA and, where necessary, filing the appropriate formal complaint to enforce their rights under the law.