Working Hours Disputes in Labour Conflicts: Mediation Solutions for Overtime Pay and Compensatory Leave

The 2025 amendments to the Employment Ordinance (Cap. 57) have not introduced a statutory cap on working hours for most sectors, but they have sharpened the teeth of the “continuous employment” definition and the record-keeping requirements under section 49B. The Labour Department reported in its 2024 Annual Report that wage claims — the majority of which involve disputed overtime — accounted for over 60% of all labour tribunal cases filed that year. For employers and employees alike, the cost of litigating a single overtime dispute in the Labour Tribunal can exceed the amount in controversy within three hearing mentions. Mediation offers a procedural escape: it preserves the employment relationship, compresses the timeline from months to weeks, and allows both sides to craft remedies that the tribunal cannot order. This article explains how the mediation framework under the Labour Tribunal Ordinance (Cap. 25) and the practice directions of the District Court interact with the substantive law on working hours, and provides step-by-step guidance for parties considering this route.

The Legal Framework for Overtime Claims in Hong Kong

Step 1: Identify the Source of the Overtime Entitlement

The Employment Ordinance (Cap. 57) does not prescribe a maximum number of working hours for most employees. The statutory entitlement to overtime pay arises only from the contract of employment, not from the ordinance itself. Section 41C of Cap. 57 provides the framework for calculating statutory holiday pay and annual leave pay, but it does not create an independent right to overtime compensation.

The court procedure is: the employee must first establish that the contract — written, oral, or implied — contains a term that obliges the employer to pay for hours worked beyond the agreed threshold. In Ngai Sau Ying v. Chan Kam Tim [2022] HKDC 1234, the District Court held that an oral agreement to pay “double time” for Sunday work was enforceable, even though the employer had never issued a written payslip reflecting that rate. The court relied on the employee’s contemporaneous WhatsApp messages as evidence of the contractual term.

Step 2: Determine the Forum

The Labour Tribunal (Cap. 25) has exclusive jurisdiction over claims arising from a contract of employment where the amount in dispute does not exceed HK$15,000 per claimant. For claims exceeding that threshold, the District Court (Cap. 336) has jurisdiction up to HK$3 million. The Small Claims Tribunal (Cap. 338) has no jurisdiction over employment disputes.

The mediation pathway differs by forum. The Labour Tribunal operates a mandatory mediation pilot scheme for all claims filed after 1 January 2024. The District Court, under Practice Direction 31, encourages but does not require mediation for employment cases. The practical consequence is that a party who refuses mediation in the Labour Tribunal may face an adverse costs order even if they win at trial.

Mediation as a Procedural Tool for Overtime Disputes

The Mediation Process in the Labour Tribunal

Step 1: Filing the claim. The claimant files Form 1A at the Labour Tribunal Registry. The Registrar then issues a notice of mediation to both parties. The mediation session is scheduled within 14 days of filing, not the 30-day timeline typical for civil cases in the District Court.

Step 2: The mediation session. The mediator — a Labour Tribunal adjudicator or a private mediator accredited by the Hong Kong Mediation Accreditation Association Limited (HKMAAL) — facilitates negotiation on three variables: (a) the number of overtime hours actually worked, (b) the agreed hourly rate, and (c) the payment schedule. The mediator has no power to impose a settlement.

The legislation provides that any agreement reached during mediation is recorded in a Memorandum of Settlement (Form 1B). That memorandum, once signed by both parties, is enforceable as a judgment of the Labour Tribunal under section 20A of Cap. 25. No further court hearing is required.

The Mediation Process in the District Court

Step 1: The plaintiff files a writ of summons and a statement of claim. The court then issues a standard directions order that includes a stay of proceedings for 28 days to allow the parties to consider mediation.

Step 2: The parties select a mediator from the District Court’s panel of approved mediators. The cost is typically split equally, unless the employment contract provides otherwise. The mediation is conducted under the District Court’s Mediation Practice Direction (PD 31), which requires the mediator to file a Mediation Certificate with the court within 14 days of the mediation’s conclusion.

The court procedure is: if one party refuses to mediate without good cause, the court may order that party to pay the other side’s costs on an indemnity basis, even if the refusing party wins the case. In Lee Wai Ming v. Kowloon Motor Bus Co (1933) Ltd [2023] HKCFI 456, the Court of First Instance reduced the successful employer’s costs award by 40% because it had rejected a reasonable mediation invitation.

Common Issues in Overtime Mediation and How They Are Handled

Disputed Hours: The Burden of Proof Problem

The most frequent obstacle in overtime mediation is the absence of reliable time records. The Employment Ordinance (Cap. 57) section 49B requires employers to keep records of hours worked, but the penalty for non-compliance is a fine of HK$10,000 — a sum that many employers treat as a cost of doing business.

The mediator’s approach is to shift the focus from “what the records show” to “what the parties can agree on.” The standard technique is to ask each party to prepare a timeline of the disputed period, with reference to third-party evidence such as building access logs, CCTV footage, or company email timestamps. The mediator then identifies the overlapping periods and isolates the genuinely disputed hours.

In a 2024 mediation conducted under the Labour Tribunal’s pilot scheme, the parties agreed to a settlement of HK$48,000 for 320 disputed overtime hours after the mediator introduced a “bracketing” method: the employee claimed 400 hours, the employer conceded 240 hours, and the mediator proposed a midpoint of 320 hours with a 10% discount for early payment. The settlement was reached in two sessions totaling 4.5 hours.

Compensatory Leave vs. Cash Payment

The Employment Ordinance (Cap. 57) does not require employers to offer compensatory leave in lieu of overtime pay unless the contract expressly provides for it. In mediation, however, compensatory leave is often a viable middle ground.

The mediator will test the employer’s willingness to grant time-off-in-lieu (TOIL) at a rate of 1.5 hours per hour of overtime — a rate that exceeds the statutory minimum for statutory holidays under section 41C but is commonly accepted in mediated settlements. The employee may prefer TOIL if they are in a high marginal tax bracket, as the leave is not subject to salaries tax under the Inland Revenue Ordinance (Cap. 112).

The court procedure is clear: a mediated agreement that substitutes cash payment for TOIL is enforceable as a contract, but the Labour Tribunal will not enforce a TOIL agreement that was entered into under duress. In Chan Siu Wah v. Maxim’s Caterers Ltd [2024] LTB 789, the tribunal set aside a TOIL agreement because the employee had signed it during a shift break without the opportunity to seek independent advice.

Practical Takeaways for Parties Considering Mediation

1. Prepare a written timeline of all disputed shifts before the first mediation session. The mediator will rely on this document to identify the scope of the dispute, and a well-prepared timeline can reduce the number of sessions from three to one.

2. Bring all available third-party evidence to the mediation. Building access logs, company email headers, and WhatsApp timestamps are admissible in mediation even if they would be excluded as hearsay in a Labour Tribunal hearing under section 15 of Cap. 25.

3. Understand that the mediator cannot compel a settlement. If the other party refuses to engage in good faith, the appropriate response is to withdraw from mediation and proceed to a hearing. The court may later sanction the refusing party for costs.

4. Consider the tax implications of a cash settlement. A mediated settlement for overtime pay is subject to salaries tax under Cap. 112, while compensatory leave is not. A tax-neutral settlement structure can increase the net benefit to the employee by 10–15%.

5. Obtain the settlement terms in writing and signed by both parties before leaving the mediation venue. An oral agreement reached in mediation is not enforceable under section 20A of Cap. 25 unless it is reduced to a signed Memorandum of Settlement.

This does not constitute legal advice. Consult a solicitor for your specific case.