Overview

PIAWE indexation can increase NSW weekly payments over time

Under the current PIAWE framework, PIAWE is indexed on 1 April each year after the date the worker first became entitled to weekly payments for the injury. If the insurer missed an applicable adjustment, used the wrong base amount, or did not correct the resulting payment history, the worker can ask for a written recalculation. A worker may request an optional insurer review or lodge a dispute with the Personal Injury Commission (PIC).

Section 82A of the Workers Compensation Act 1987 provides for annual PIAWE indexation. SIRA's current reference guide states that, after PIAWE is calculated, indexation occurs on 1 April each year after the first weekly-payment entitlement date for the injury.

This page describes the current PIAWE rules used for most workers injured on or after 21 October 2019. It does not apply in the same way to exempt workers, coal miners, volunteers or dust-disease claims, and earlier injuries may require the historical rules to be checked.

When to check the insurer's indexation

Your weekly rate has stayed flat through a long-running claim.
The insurer cannot explain in writing what indexation method or date they applied.
Your arrears were recalculated, but the increase looks too small.
A section 37 or section 38 step-down happened and the insurer mixed up the rate inputs.

If one of those applies, compare the weekly-payment history against the PIAWE calculation guide and the section 37 rate guide before asking for a written recalculation.

What is indexation?

Indexation changes the PIAWE figure used in later weekly-payment calculations. It is different from calculating the original PIAWE under Schedule 3 and different from applying the section 36, 37 or 38 weekly-payment formula. Those steps should be checked separately.

That does not mean every insurer explanation will be simple. Some disputes involve whether the right statutory mechanism was used at the right time. Others are more basic: the insurer never updated the rate at all, or updated one part of the calculation but not the rest of the weekly-payment chain.

Common indexation mistakes

Insurer applies the wrong base period.
Insurer fails to apply updates at the correct time.
Indexation is omitted entirely from long-running claims.
Adjusted rate is not flowed through to arrears calculations.
Step-down rates are changed without rechecking the indexed starting figure.

Key legal references overview

Section 82A — annual indexation of PIAWE on the statutory review date.
Schedule 3 — calculation of the original PIAWE, not the annual indexation mechanism.
SIRA PIAWE reference guide — states the 1 April timing and the current decision pathways.
Dispute options — a worker can seek an optional insurer review or lodge a PIC dispute.

What usually goes wrong before an indexation dispute surfaces

Old PIAWE errors are never fixed properly

If the original weekly rate was wrong, indexation gets layered onto a bad number. That means every later increase can still be wrong. Start with the PIAWE recalculation guide if the baseline itself looks suspicious.

The rate changes after a work-capacity decision

Workers often focus on the medical dispute and miss the arithmetic problem underneath it. If your weekly rate dropped after an alleged capacity change, compare the insurer reasoning with the work capacity dispute pathway.

Long claims approach the 260-week cutoff unnoticed

A worker may only discover the rate history is wrong when section 39 is close and every dollar of arrears now matters. Review the section 39 guide early if your claim is aging.

Payment notices are too vague to audit

If letters only state the final amount and never show the calculation path, request a full written breakdown. That record becomes important if you later need to escalate through the PIC dispute process.

What should you do?

Request a full payment rate breakdown in writing.
Ask the insurer to identify what indexation method/date they used.
Compare against your historical notices and payment summaries.
If unsure, get claim-specific advice and request recalculation.

If you suspect a step-down error as well as indexation mistakes, compare your insurer's method against the section 37 weekly-rate framework and follow the evidence checklist in our PIAWE recalculation request guide.

Best next guide by your current problem

If the starting figure looks wrong, begin with PIAWE calculation.
If the insurer won't correct the numbers, use PIAWE recalculation request.
If your weekly amount changed after a capacity letter, run a parallel work capacity dispute.
If payments are already cut or stopped, move immediately to weekly payments stopped.

Documents that make indexation reviews faster

Original weekly-payment notice and later rate notices.
Remittance advice showing what was actually paid over time.
Any internal review or section 78 correspondence affecting payments.
PIAWE breakdowns, recalculation letters, or payroll schedules already provided.
Certificates of capacity if the insurer tied the rate change to capacity assumptions.

Unsure if your insurer applied indexation correctly?

We can review your weekly payment history and identify whether your rate has been under-calculated.

Request a Free Rate Review Call (02) 7233 3661

Frequently Asked Questions

When should indexation be applied to NSW weekly payments?

Under the current PIAWE framework, PIAWE is indexed on 1 April each year after the date the worker first became entitled to weekly payments for the injury. Historical and exempt-worker rules should be checked separately.

What should I do if I suspect an indexation underpayment?

Ask the insurer in writing for a full rate breakdown showing the base figure, indexation dates, method used, and period-by-period amounts. Then compare that against your notices and remittance history before requesting correction and arrears.

Can I recover backpay if indexation was missed?

If the missed adjustment caused an underpayment, ask for a corrected period-by-period calculation and the resulting adjustment payment. Whether arrears are due, and for which period, depends on the applicable rules and payment history.

What if the insurer refuses to fix an indexation error?

You may ask the insurer for an optional internal review or lodge a dispute with the Personal Injury Commission. IRO/ILARS funding may be available for approved legal help, but IRO does not decide the PIAWE amount.

An indexation error can quietly underpay you for months

If the insurer did not update the rate correctly, check the payment history before records become harder to reconstruct. A period-by-period comparison can identify the amount and date of any underpayment.

Start Free Claim Check Call (02) 7233 3661

PIAWE Indexation