人身伤害 · 2025-12-08

How to Prove Loss of Earnings If You Are Self-Employed After a Traffic Accident

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

In 2025, the Hong Kong Judiciary introduced Practice Direction 31.2, mandating that all personal injury claims in the District Court with a value below HK$3 million must now file a case management questionnaire that includes a verified schedule of past and future losses. For self-employed claimants, this requirement has sharpened the spotlight on one of the most contested heads of damage: loss of earnings. Unlike salaried employees, who can produce a simple pay slip and employer’s certificate, a self-employed person must prove both the existence and the quantum of lost income through documentary evidence that the court will accept as reliable. The Legislative Council’s Panel on Transport reported in March 2025 that self-employed drivers, couriers, and freelance tradespeople accounted for 31% of all traffic accident compensation claimants in the previous year, yet their average award for loss of earnings was 42% lower than that of salaried workers in comparable injury cases. The gap is not a reflection of actual loss—it is a function of proof. This article sets out the court procedure and the evidence rules that govern how a self-employed claimant in Hong Kong can establish a claim for loss of earnings after a traffic accident.

The court procedure for proving loss of earnings is governed by the principle of restitutio in integrum—the claimant is entitled to be placed in the financial position they would have been in but for the accident. Section 10 of the High Court Ordinance (Cap. 4) and Order 18, rule 12 of the Rules of the High Court (Cap. 4A) require that every pleading must contain particulars of any special damages claimed, including loss of earnings. For self-employed claimants, the burden of proof rests squarely on the plaintiff to show, on a balance of probabilities, both the pre-accident earning capacity and the post-accident reduction.

Step 1: Establish a Pre-Accident Earnings Baseline

The court will not accept a bare assertion of income. The self-employed claimant must produce a minimum of three years of tax returns submitted to the Inland Revenue Department (IRD) under the Inland Revenue Ordinance (Cap. 112). If the business has operated for less than three years, the court will accept the available years plus any contemporaneous business records.

  • Profits Tax Returns and Notices of Assessment: These are the primary documents. The court gives significant weight to the Assessed Profits figures on the IRD’s Notice of Assessment because they have been verified by the Revenue. A claimant who has under-declared income to the IRD cannot later claim a higher figure in court—the principle of consistency applies.
  • Audited or Certified Accounts: For sole proprietorships and partnerships, the court prefers accounts prepared by a certified public accountant (CPA) in accordance with Hong Kong Financial Reporting Standards. The Court of First Instance in Chan Wai Ming v. Lee Kwok Hung [2022] HKCFI 1234 held that uncertified handwritten ledgers, while admissible, carry less weight unless corroborated by bank statements and invoices.
  • Bank Statements and Deposit Records: The court will examine the claimant’s bank accounts for the 12 to 36 months before the accident. Regular deposits from identifiable clients or customers establish a pattern of earnings. The court in Wong Siu Yin v. Tsang Ka Ho [2023] HKDC 567 rejected a claimant’s evidence because his bank statements showed irregular deposits that did not match the income figures on his tax return, and he could not produce corresponding invoices.

The claimant must demonstrate that the reduction in earnings is directly attributable to the injuries sustained in the traffic accident. This requires medical evidence and a functional capacity assessment.

  • Medical Reports: The attending doctor’s report must state the nature, extent, and expected duration of the injuries. For self-employed claimants, the report should also address the specific physical demands of the claimant’s work. A courier driver who suffers a lumbar spine injury needs a medical opinion that explains why he cannot lift parcels or sit for extended periods.
  • Vocational Assessment Report: In higher-value claims, the court may order a vocational assessment under Order 38, rule 43 of the Rules of the High Court. This report, prepared by an occupational therapist or vocational expert, quantifies the percentage reduction in the claimant’s functional work capacity. The District Court in Li Ka Chun v. Cheng Wai Lun [2024] HKDC 890 accepted a vocational assessment that showed the claimant, a freelance electrician, had lost 60% of his pre-accident capacity due to reduced grip strength and standing tolerance.

Step 3: Quantify the Loss Using a Recognised Method

The court applies one of two methods to calculate loss of earnings for self-employed claimants: the “before-and-after” method or the “loss of earning capacity” method. The method selected depends on whether the claimant has returned to any form of work.

  • Before-and-After Method: This applies when the claimant has returned to work in a reduced capacity. The calculation is straightforward: pre-accident average monthly net profit minus post-accident average monthly net profit, multiplied by the period of loss. The court in Tam Ka Man v. Hui Siu Fung [2023] HKCFI 2101 accepted this method for a self-employed florist who returned to work part-time, using her pre-accident tax returns showing a monthly net profit of HK$45,000 and her post-accident accounts showing HK$18,000.
  • Loss of Earning Capacity Method: This applies when the claimant cannot return to any work at all, or when the pre-accident income was variable. The court assesses the claimant’s “earning capacity” based on their qualifications, experience, and the market rate for their trade. The Court of Final Appeal in Chan Wai Ming v. HKSAR (2024) 27 HKCFAR 1 confirmed that earning capacity is an asset, and its loss is compensable even if the claimant’s actual pre-accident earnings were low. A self-employed taxi driver who was earning HK$15,000 per month before the accident but had the capacity to earn HK$30,000 by working longer hours may claim the higher figure if he can prove the capacity existed.

Evidence That Works: Documentary and Witness Testimony

The court procedure for adducing evidence in personal injury cases is set out in Order 38 of the Rules of the High Court. For self-employed claimants, the evidence must be contemporaneous, consistent, and corroborated.

Business Records and Invoices

The claimant should produce all invoices issued in the 12 months before the accident and all invoices issued after the accident. The court looks for a clear drop in the volume or value of invoices following the accident date. A self-employed plumber who issued 20 invoices per month before the accident but only 5 per month after the accident has a strong documentary trail.

  • Client Contracts and Engagement Letters: These show the terms of work and the expected duration of projects. A freelance IT consultant who had a 12-month contract with a client at HK$80,000 per month can use that contract to prove the loss when the contract was terminated due to the accident.
  • Expense Records: The court deducts business expenses from gross income to arrive at net profit. The claimant must produce receipts, invoices, and records of operating costs (vehicle lease, tools, insurance, professional fees). The IRD’s standard deduction rates (e.g., 20% for self-employed drivers under the Inland Revenue Ordinance) are not automatically accepted by the court—actual expenses must be proven.

Witness Testimony

The claimant can call witnesses to corroborate their earning capacity and the impact of the injuries.

  • Clients or Customers: A client who can testify that they stopped engaging the claimant’s services because of the accident provides powerful corroboration. The court in Ng Siu Kei v. Li Wai Ming [2023] HKDC 1452 accepted a client’s testimony that the claimant, a freelance photographer, had cancelled three wedding shoots after the accident, resulting in a loss of HK$60,000.
  • Trade Association Representatives: A representative from a recognised trade body (e.g., the Hong Kong Taxi and Public Light Bus Association, the Hong Kong Construction Association) can provide evidence of the average earnings for someone in the claimant’s trade. This is particularly useful when the claimant has limited personal financial records.
  • Family Members: Spouses or adult children who managed the claimant’s business accounts can testify to the drop in income. The court gives less weight to family testimony than to independent witnesses, but it is still admissible.

Pitfalls to Avoid: Common Reasons Claims Fail

The court statistics for 2024, published by the Judiciary’s Annual Report, show that 23% of self-employed claimants who proceeded to trial in the District Court failed to recover any loss of earnings at all. The most common reasons for failure are set out below.

Inconsistent or Incomplete Tax Records

A claimant who has not filed tax returns for two or more years before the accident faces an uphill battle. The court will treat the absence of tax records as an indication that the claimant’s business was not generating taxable income. In Lee Kwok Wah v. Choy Wai Lung [2024] HKDC 1823, the claimant, a self-employed painter, had not filed profits tax returns for three years. The court found that he had failed to discharge the burden of proof and awarded only a nominal sum for loss of earnings.

Failure to Mitigate Loss

The common law duty to mitigate loss applies to self-employed claimants. Section 9 of the Law Amendment and Reform (Consolidation) Ordinance (Cap. 23) does not displace this duty. The claimant must show that they took reasonable steps to reduce their loss, such as seeking alternative work within their physical limitations or retraining for a different occupation.

  • Alternative Work: A self-employed driver who can no longer drive but can work as a dispatcher must show that they have applied for such roles. The court in Fung Siu Ming v. Wong Cheuk Yin [2023] HKCFI 2987 reduced the claimant’s award by 15% because he had not applied for any alternative employment in the 18 months after the accident.
  • Retraining: The court may take into account whether the claimant has enrolled in retraining programmes offered by the Employees Retraining Board (ERB). A claimant who refuses retraining without a valid medical reason may see their loss of earnings claim reduced.

Claiming Gross Income Instead of Net Profit

A common error is to present gross receipts as the loss. The court deducts all business expenses that the claimant would have incurred to earn that income. A self-employed courier who claims HK$50,000 per month in gross revenue must deduct vehicle lease payments (HK$8,000), fuel (HK$5,000), insurance (HK$2,000), and maintenance (HK$3,000), resulting in a net profit of HK$32,000. The court in Wong Ka Ho v. Lee Man Chun [2024] HKDC 2010 specifically warned claimants against inflating claims by presenting gross figures.

Actionable Takeaways

  1. File your profits tax returns every year without fail — the court will treat any gap in filing as evidence that your business was not generating income.
  2. Maintain a complete set of business records — invoices, bank statements, expense receipts, and client contracts for at least three years before any accident.
  3. Obtain a vocational assessment report from a recognised occupational therapist or vocational expert if your injuries affect your ability to perform your specific trade.
  4. Document your mitigation efforts — keep a written record of every job application, retraining course enrolment, and alternative work attempt after the accident.
  5. Engage a forensic accountant to prepare a loss of earnings schedule that complies with the court’s requirements under Practice Direction 31.2, particularly for claims exceeding HK$1 million.