The Week 130 Milestone: WPI and Beyond

Section 39 — the 130-week cutoff

Under the NSW Workers Compensation Act 1987, section 37 governs weekly payments from week 14 to week 130. Section 39 then caps the total at 130 weeks of weekly payments unless a worker has permanent impairment of more than 20%. The threshold wording matters — it is "more than 20%", so 20% WPI does not qualify, 21% does.

This section was introduced by the 2012 reforms and has been the single most significant change to long-term entitlements in the NSW scheme. It is why WPI assessment becomes the central question from about week 104 onwards — approximately two years in — in most long-running claims.

How Whole Person Impairment is assessed

WPI is assessed under the AMA Guides to the Evaluation of Permanent Impairment, 5th edition, as modified by the SIRA NSW Workers Compensation Guidelines for the Evaluation of Permanent Impairment. Only stable, permanent impairment counts — your condition has to be at "maximum medical improvement" first. For a recently injured back, that usually means 12 to 24 months post-injury before a meaningful WPI figure can be measured.

A trained, accredited WPI assessor measures the impairment of each injured body system — spine, upper limb, lower limb, mental and behavioural, and so on — and combines them using the Combined Values Chart in the AMA Guides. Psychological injury is assessed separately under a different clinical instrument (the PIRS scale) but feeds into the same WPI framework.

You only get one shot at a WPI claim for the same injury. Once a section 66 assessment is made and accepted, you cannot reopen the figure except in narrow circumstances. That is why preparation matters — the assessment has to happen at the right time and with the right specialist.

The two pathways beyond week 130

Pathway A — 21% WPI or higher. Weekly payments continue past week 130 under section 39. Medical expenses continue for life under sections 59A and 59B at the highest tier. A section 66 lump sum for permanent impairment is payable at the upper-tier rate. Common-law damages through section 151H remain an option if the 15% threshold and negligence can be established.

Pathway B — below 21% WPI. Weekly payments cease at week 130 under section 39. A section 66 lump sum for permanent impairment is still payable based on the WPI figure. Medical expenses continue for 2 years (below 10% WPI) or 5 years (10–20% WPI) under sections 59A and 59B — and can be longer for specific surgical needs approved under section 59 itself. If WPI is at least 15%, common-law damages under section 151H remain available subject to proving negligence.

Our compensation lawyers model both pathways together — the lump-sum numbers, the ongoing medical coverage, and the common-law upside where it applies — so the decision about timing is made with the full picture, not piecemeal.