Brewer v JB Hi-Fi: PIRS self-care evidence and judicial review

How the assessment changed from 17% to 8%

The worker alleged that sexual harassment by a fellow employee caused post-traumatic stress disorder and major depressive disorder with anxious distress. Her psychiatrist assessed 19% WPI. A doctor retained by the employer considered that maximum medical improvement had not been reached and did not assess WPI.

A PIC Medical Assessor assessed 17% WPI after applying a one-tenth deduction for pre-existing impairment. The employer appealed. Without re-examining the worker, the Appeal Panel assessed 8% WPI after the same proportional deduction. The only difference between the Medical Assessor's six PIRS classes and the Panel's classes was self-care and personal hygiene: Class 3 became Class 2.

How the PIRS calculation worked in this case

The Psychiatric Impairment Rating Scale assesses six areas of function: self-care and personal hygiene; social and recreational activities; travel; social functioning; concentration, persistence and pace; and employability. Each scale is assigned a class from 1 to 5. The median class is then identified, an aggregate score is calculated and the result is converted to WPI under the Guidelines.

That single class change lowered the median from 3 to 2 and changed the applicable conversion row. The judgment records the resulting assessments as 17% and 8% after the agreed one-tenth deduction. The case illustrates why the reasons for each individual scale matter, rather than only the final percentage.

What the Appeal Panel excluded

The Medical Assessor had considered the worker's reliance on her husband for cooking and laundry, together with her belief that without him she would neglect her appearance and nutrition and would be at risk of suicide. The Appeal Panel treated how she might function without him as speculative. It focused on her functioning on the assessment day, when she continued to shower and change clothes, and placed her in Class 2.

The Supreme Court emphasised that this was not simply a contest over which class looked more persuasive. A Court cannot intervene in a medical assessment merely because it would have reached a different factual view.

The legal error identified by the Supreme Court

At paragraphs [47]-[49], Elkaim AJ identified the error precisely. The worker's concern about functioning without her husband was not necessarily an irrelevant future hypothetical. The belief and anxiety existed when she was examined and could be a present expression of her psychiatric condition. Her existing reliance on support also bore directly on the Class 3 concept of being unable to live independently without regular support.

The Court did not say that the evidence compelled Class 3. It held that the Panel had failed to take a relevant matter into account when it excluded the evidence on the stated basis.

Why the error was material

Jurisdictional error required materiality. The question was whether the Panel's decision could realistically have been different if the relevant evidence had been considered, not whether a different result was certain. At paragraphs [50]-[51], the Court found that considering the worker's present anxiety and dependence could have supported Class 3. Because that class change could alter the median and conversion row, the error was material.

The orders and their limits

The Appeal Panel decision was declared void and set aside, and the matter was remitted to the President of PIC to be determined according to law. JB Hi-Fi was ordered to pay the worker's costs of the Supreme Court proceedings. No costs order was made concerning PIC or the Appeal Panel.

The Court did not restore the 17% certificate, select Class 3 or decide the worker's final entitlement. Those issues returned to the Commission.

The July 2026 threshold caution

The judgment records that the increase in the section 151H threshold for psychological injury commencing on 1 July 2026 did not apply to this worker. That observation is specific to the applicable transitional position. Current SIRA guidance states that the work injury damages threshold for primary psychological injury is at least 25% for claims within the new post-1 July 2026 framework. The section 66 lump-sum threshold remains at least 15% WPI for primary psychological injury.

A reader should therefore not use the 15% work injury damages threshold discussed in Brewer as a universal current rule. The injury, notification and transitional facts must be checked. The case remains important for how relevant functional evidence and material legal error are analysed.

Evidence questions for a psychiatric WPI review

• Does the certificate explain the evidence and reasoning for each of the six PIRS classes?
• Is current support from a partner, family member or service provider described by task, frequency and consequence?
• Does the evidence separate what the worker does independently from what occurs only because regular support is available?
• Are statements about fear, dependence or future functioning linked to the diagnosed psychiatric condition?
• Did an Appeal Panel reject evidence as irrelevant, or did it consider the evidence and assign it less weight?
• Is the complaint a recognised appeal or judicial-review error, rather than disagreement with clinical judgment?

Points to take from the decision

• The PIRS assessment used six functional scales; a one-class change in self-care altered the median class and produced a large change after conversion.
• The worker's belief about functioning without her husband was itself a present manifestation of her psychiatric condition, not necessarily an irrelevant prediction.
• Existing support can be relevant when the class definition asks whether the person can live independently without regular support.
• The materiality test asked whether the decision could realistically have been different without the error, not whether a different result was certain.
• The Supreme Court remitted the matter and did not restore the 17% assessment or decide the final WPI.

Frequently asked questions

Decision and primary sources

• Full decision: Brewer v JB Hi-Fi Group Pty Ltd [2026] NSWSC 917
• Workplace Injury Management and Workers Compensation Act 1998 (NSW), section 323 - pre-existing impairment deductions
• Workers Compensation Act 1987 (NSW), section 65A - psychological permanent impairment compensation
• Workers Compensation Act 1987 (NSW), section 151H - work injury damages impairment threshold
• SIRA NSW permanent impairment guidelines - including the Psychiatric Impairment Rating Scale
• SIRA guide to psychological injury claims and the July 2026 reforms

Last legally reviewed: 1 August 2026.