Loss of Earnings Personal Injury Damages Expert Witness

Loss of earnings is often the largest head of special damages in personal injury and clinical negligence claims. A damages expert witness establishes the claimant's pre-incident earning capacity using P60s, tax returns, payslips, and employment records, then calculates past loss from the date of injury to trial on a net basis after income tax and National Insurance. Future loss is capitalised using the multiplier/multiplicand method under the Ogden Tables and the prescribed discount rate, producing a lump sum that reflects the present value of earnings the claimant will not receive.

Claims involving self-employed claimants, company directors, and business owners require forensic analysis of accounts for three to five years pre-accident to establish maintainable net earnings. The expert addresses business growth or decline trajectories that would have occurred absent the injury, apportions remuneration between salary and dividends where relevant, and distinguishes loss attributable to the injury from wider market or operational factors. Where the claimant retains some earning capacity, partial loss models and stepped multiplicands may be appropriate.

Beyond direct earnings loss, the court may award a Smith v Manchester lump sum for handicap on the open labour market - compensating for the disadvantage the claimant faces when competing for employment despite returning to work. Expert witnesses quantify this head with reference to judicial guidance and the claimant's residual earning capacity. All figures are presented in a Schedule of Loss compliant with CPR Part 35, with transparent assumptions on retirement age, mortality, and contingencies capable of withstanding cross-examination.

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