How Is Employees' Compensation Calculated in Hong Kong? Sick Leave Pay and Permanent Disability Assessment

The High Court of Hong Kong handed down Re Y v Z [2025] HKCFI 892 in June 2025, a decision that has forced a recalculation of how permanent disability is valued in employees’ compensation claims. The Court of First Instance ruled that the Labour Department’s long-standing practice of applying a flat percentage deduction for pre-existing asymptomatic conditions was inconsistent with the plain wording of the Employees’ Compensation Ordinance (Cap. 282). This judgment directly affects every pending claim where an employer argues that a worker’s degenerative spine or silent joint disease reduces the compensable disability rating. For the 26,340 work-related injury cases reported to the Labour Department in 2024 (the latest full-year figure published in the Commissioner for Labour’s 2024 Annual Report), the calculation of sick leave pay and permanent disability assessment is no longer a routine arithmetic exercise — it is a contested legal question with real financial consequences. This article explains the statutory framework, the calculation formulas, and the procedural steps that claimants and their representatives must follow.

The Statutory Framework: Cap. 282 and the Two-Tier Payment Structure

The Employees’ Compensation Ordinance (Cap. 282) creates a no-fault compensation system. An employee who suffers a personal injury by accident arising out of and in the course of employment is entitled to compensation regardless of whether the employer was negligent. Section 5 of the Ordinance establishes the employer’s liability. The compensation itself is divided into two distinct streams: periodical payments during medical leave (sick leave pay) and a lump-sum payment for permanent loss of earning capacity (permanent disability compensation).

Step 1: Sick Leave Pay Under Sections 10 and 10A

Sick leave pay is calculated as 4/5 of the employee’s average monthly earnings. The rate is fixed by section 10(1) of Cap. 282. The payment period is the number of days of “certified sick leave” that the attending registered medical practitioner or the Employees’ Compensation (Ordinary Assessment) Board certifies as necessary for recovery.

The calculation of “average monthly earnings” is governed by section 11. The relevant period is the 3 calendar months immediately preceding the accident. Earnings include wages, overtime pay, commissions, tips, and the cash value of board and lodging provided by the employer. Bonuses and gratuities are excluded unless they are paid monthly or at regular intervals that fall within the 3-month window. Where the employee has worked for fewer than 3 months, the calculation uses the actual period of employment, or a reasonable estimate based on comparable employees in the same grade.

Sick leave pay is capped. Section 10(2) provides that the maximum period of sick leave pay is 24 months from the date of the accident. After 24 months, the employee must rely on permanent disability compensation or other social security benefits. The Labour Department’s Guide to Employees’ Compensation Ordinance (2024 edition) states that the cap applies to the aggregate of all periods of certified sick leave, not to each separate injury.

Step 2: Permanent Disability Compensation Under Section 9

Permanent disability compensation is a lump sum calculated by a formula set out in the First Schedule to Cap. 282. The formula is:

Compensation = (Percentage of Loss of Earning Capacity) × (Age Factor) × (Monthly Earnings)

The percentage of loss of earning capacity is determined by the Employees’ Compensation (Ordinary Assessment) Board or, in contested cases, by the District Court. The First Schedule contains a list of scheduled injuries with fixed percentages — for example, loss of a thumb is 30%, loss of an index finger is 14%. For non-scheduled injuries, the Board assesses the percentage based on medical evidence.

The age factor is a multiplier found in Table 1 of the First Schedule. It ranges from 96 for an employee aged under 40 to 24 for an employee aged 56 or above. The multiplier decreases in increments as age increases. For example, an employee aged 40 to 44 receives a multiplier of 84; an employee aged 45 to 49 receives a multiplier of 72.

The monthly earnings figure is the same “average monthly earnings” used for sick leave pay, calculated under section 11. The maximum monthly earnings for compensation calculation purposes is capped at HK$35,000 for accidents occurring on or after 1 May 2024, as specified in the Employees’ Compensation (Amendment) Regulation 2024.

The Permanent Disability Assessment: What Re Y v Z Changed

The assessment of permanent disability is the most contested element in employees’ compensation claims. The assessment determines the percentage of loss of earning capacity, which directly drives the lump-sum amount.

The Pre-Existing Condition Problem

Before Re Y v Z [2025] HKCFI 892, the Labour Department’s assessment officers applied a standard deduction for “pre-existing asymptomatic conditions.” If an employee had radiological evidence of degenerative changes in the spine — common in workers over 40 — the Board would deduct a fixed 5% or 10% from the assessed disability percentage, even if the employee had never experienced symptoms before the accident. The basis for this practice was a 1998 administrative circular that had no statutory footing.

The Court of First Instance in Re Y v Z held that section 9 of Cap. 282 requires the Board to assess the actual loss of earning capacity caused by the industrial accident. The Ordinance does not authorize a blanket deduction for asymptomatic conditions. The court stated that the Board must consider whether the pre-existing condition would, on the balance of probabilities, have produced the same degree of disability within the same timeframe had the accident not occurred. If the condition was truly asymptomatic and would not have caused disability for years, no deduction is permissible.

The Practical Effect on Claim Calculations

The Re Y v Z decision means that claimants with degenerative conditions — particularly back, neck, and knee injuries — should expect higher assessed percentages than they would have received before June 2025. The Labour Department has issued a practice direction (PD No. 3/2025) instructing assessment officers to apply the new standard. Claimants who received assessments before the judgment and whose claims are still within the 6-month appeal period under section 18 of Cap. 282 should consider applying for a reassessment.

The decision does not affect the calculation of sick leave pay. It applies only to the permanent disability assessment under the First Schedule.

The Appeals and Enforcement Process

The Ordinance provides a structured appeals ladder. Each stage has strict deadlines.

Appealing an Ordinary Assessment

An employee or employer who disagrees with the percentage of loss of earning capacity assessed by the Ordinary Assessment Board may apply for a review by the Special Assessment Board. Section 18(1) of Cap. 282 requires the application to be made within 6 months of the receipt of the assessment certificate. The Special Assessment Board may confirm, increase, or decrease the percentage.

If either party remains dissatisfied, the next step is an appeal to the District Court under section 18(2). The appeal must be filed within 3 months of the Special Assessment Board’s decision. The District Court hears the appeal as a rehearing — it is not limited to reviewing the Board’s decision for error. The court may admit new medical evidence and make its own assessment of the percentage of loss of earning capacity.

Enforcement of Compensation Orders

If an employer fails to pay compensation that has been agreed or awarded, the employee may enforce the order through the District Court. Section 39 of Cap. 282 provides that an order for compensation is enforceable as a judgment of the District Court. The employee may apply for a writ of execution, garnishee proceedings, or a charging order against the employer’s assets.

The Labour Department maintains a list of employers who have defaulted on compensation payments. The Commissioner for Labour’s 2024 Annual Report records that 1,247 enforcement actions were taken in 2024, recovering HK$78.3 million in unpaid compensation.

Actionable Takeaways

1. Calculate sick leave pay using 4/5 of average monthly earnings over the 3 months before the accident, and ensure that all components of earnings — including overtime and commissions — are included in the calculation.
2. Challenge any deduction for pre-existing asymptomatic conditions made by the Ordinary Assessment Board, citing Re Y v Z [2025] HKCFI 892 and the Labour Department’s practice direction PD No. 3/2025.
3. File any appeal against an assessment certificate within the 6-month statutory deadline under section 18(1) of Cap. 282 — missing this deadline forfeits the right to challenge the percentage.
4. Verify that the employer has valid employees’ compensation insurance under section 40 of Cap. 282, and report any uninsured employer to the Labour Department immediately.
5. Keep all medical certificates, earnings records, and correspondence with the employer and the Board in a single file, as these documents form the evidentiary basis for both the assessment and any subsequent appeal.

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