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PIAWE calculation and weekly payments

Updated on September 06, 2023 | Published on June 18, 2019

By Matthew Garling

PIAWE (pre-injury average weekly earnings) should be a fairly simple calculation however insurers regularly get it wrong.

The recent Workers Compensation Amendment Regulation 2018 (Amendment Regulation) has amended the Workers Compensation Act to make significant changes to the calculation of pre-injury average weekly earnings (PIAWE). PIAWE is defined as;

“The weekly average of the gross pre-injury earnings received by the worker during the period of 52 weeks before the injury in any employment in which the worker was engaged at the time of injury.”

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If you disagree with the amount calculated by the insurer, you can challenge it.

How is it calculated?

Based on the definition of PIAWE, the insurer is required to obtain a copy of the pay slips for the 52 weeks immediately prior to the injury and calculated the average gross weekly earnings received by the worker during that period.

This should be a fairly simple calculation however insurers regularly get it wrong.

It includes the calculation of “pre-injury average weekly earnings” and includes the workers ordinary earnings as well as any overtime and/or shift allowance payment.

The insurer must make a decision in writing in relation to the PIAWE rate and notify the worker of this decision.

What if I disagree?

If you disagree with the amount calculated by the insurer, this can be challenged through the Workers Compensation Commission and you should discuss this with a lawyer.

The recent changes

The significant change that has been made by the amending regulations is that for those that are injured on or after 26 October 2018, overtime and shift allowances are no longer excluded from the calculation of the PIAWE rate after receiving 52 weeks of weekly compensation payments.

For anyone injured prior to 26 October 2018, the PIAWE is recalculated after you have received 52 weeks of weekly compensation benefits to reduce the PIAWE rate by excluding any overtime or shift allowance from the calculation.

This often resulted in a significant reduction in the weekly amount of compensation entitled to an injured worker. Often workers rely heavily on receiving overtime and shift allowance in their weekly wage.

This has been recognised by the government and changes made to the calculation of the PIAWE rate but only for people injured on or after 26 October 2018.

The 4 systems for determining the PIAWE rate

There are therefore 4 different systems for determining the PIAWE rate, depending on the date and circumstances of your injury.

  1. Coal Miners have a different method of calculating average weekly earnings.
  2. Exempt workers under the Workers Compensation Act (such as emergency workers) have a different method of calculating average weekly earnings.
  3. Those workers injured before 26 October 2018 as noted above.
  4. Those workers now injured on or after 26 October 2018 as noted above.

The government has simplified the calculation of weekly payments and made it much fairer by allowing a worker to receive essentially 80% of their pre-injury average weekly earnings including overtime and shift allowance.

If you have any questions in relation to the calculation of the PIAWE rate please do not hesitate to contact us to discuss further.

Garling & Co Lawyers

Matthew Garling

Matthew Garling is an Accredited Specialist in Personal Injury Law approved by New South Wales Law Society. He is admitted to practice in the Supreme Court of NSW and the High Court of Australia. Matthew is also a member of...
Graeme M.
04:22 29 Oct 25
Matthew Garling and his team have been excellent in dealing with my case. I am very happy with the result and the process to guide me through everything over the last two years. Most importantly... happy with the payout. Highly recommend if you’re thinking of claiming for an injury caused by another party.read more
Melanie F.
00:20 18 Oct 25
3 years ago, I got injured at work and at first I was denied getting any help from a certain insurance company so I looked up lawyers that could possibly help me getting what I was entitled to and I... am so glad Garling and co took on that responsibility to help me,I still have some way to go but Kerry Byrnes and her team have gone above and beyond for me I am so grateful I had her in my corner,I highly recommend Garling and co I don’t know where I would be now if not for guidance and understanding THANKYOU Kerry and team I am 1 happy customerread more
steve J.
00:38 29 Sep 25
Brilliant Service and I am always kept well informed. Definitely recommend this law firm to anyone seeking compensation lawyers. I really appreciate and thank Matthew and his wonderful team for their... incredible and sincere hard work they have put in for my case in the last couple of years. My family and I are blessed and very satisfied with our outcome. God Bless you Matthew Garling and your team.read more
Mark W.
10:50 17 Sep 25
Garling and Co. are an exceptional outfit. Matthew Garling is a talented lawyer and supported and surrounded by a great team of people including Allison Luck and others. What made Matthew... particularly impressive with my case were his ability to communicate complex legal processes and simplify options for the next steps, his genuine interest in the law, and his passion to seek appropriate compensation on my behalf. He was not ready to settle my case until I was ready to settle the case. I am very grateful to have had Garling and Co. 'in my corner' and would not hesitate to recommend this business to others.read more
Elyce
22:22 06 Sep 25
I never imagined this chapter would close, but it finally has.I cannot thank Joelle enough for the incredible support she gave me during one of the most challenging times in my life.Her... professionalism and genuine care throughout my claim process exceeded all my expectations.Whenever I contacted Garling and Co to speak with Joelle, I was assisted by Lynn. She was always polite, clear, and concise, and consistently showed empathy whenever I called or emailed.read more
Anonymous 1.
22:02 04 Sep 25
I was referred to Garling & Co Lawyers, after previously retaining another law firm who failed to progress my matter for a period verging on three years.This was extremely frustrating and damaging,... causing me a lot of unnecessary stress and unreasonable delays. After my first conference with Matthew, he understood the challenges that I had faced and that I wanted to resolve my matter with the defendant reasonably and in a timely manner.My matter was resolved at mediation and during the process, Matthew and Dallas Morgan (barrister), professionally communicated the procedure to me and they negotiated a reasonable settlement, that I was comfortable in accepting.Thank you to Matthew and Allison for being patient with me during the most challenging time of my life. I can now move on with my life and heal. Had I not retained Garling & Co Lawyers, I highly doubt my matter would ever have been resolved.read more
Sammy R.
01:07 04 Sep 25
Garling and Co have been the best lawyers. Kerry and Matthew have worked and been working on my case for a long time now. They have worked so hard and fought for my case every step of the way. They... are highly experienced in what they do, and are compassionate at the same time. I highly recommend this firm. My life changed in an instant when I was hit by a car, I will be forever grateful for the help they've given me. 10/10read more
Donelle L.
20:37 11 Aug 25
So very happy with the service Garling has provided with both of my claims from the start to the end cannot thank them enough Mathew and the team are the best
Rachel J
01:46 09 Aug 25
The level of service that Garling & Co provides is truely unmatched.Thank you to both Matthew and Allison for your professionalism & dedication throughout my journey of being a client.Matthew... provided me with genuine, factual and straightforward advice throughout the process and this made things easy to understand and put any uncertainty I had to rest. A complicated process ran smoothly and I always felt supported, knew where things were at and that I was in good hands.The communication at Garling & Co is exceptional. Every question I had, whether by email or phone was responded to in a timely manner and at every stage I was confident Matthew would be guiding me through the next steps - which he did, until my case was finalised.Thank you for upholding clients dignity and respect, these are values people like me need in such critical times of their lives. As a client, it is clear these values shine through. You provided me with a safe space where I was able to focus on my day to day challenges caused by my injuries, while you took care of the legal aspect on my behalf.Lastly, I’m grateful for your commitment to the work that you do and the care that you provide to people who find themselves in unfortunate circumstances beyond their control. And thank you so much for the very positive outcome that I received.read more
Ros P.
07:12 29 Jun 25
Staff polite, clear and concise. Explained well in a logistical manner. Overall a great service.
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Graeme M.
04:22 29 Oct 25
Matthew Garling and his team have been excellent in dealing with my case. I am very happy with the result and the process to guide me through everything over the last two years. Most importantly... happy with the payout. Highly recommend if you’re thinking of claiming for an injury caused by another party.read more
Melanie F.
00:20 18 Oct 25
3 years ago, I got injured at work and at first I was denied getting any help from a certain insurance company so I looked up lawyers that could possibly help me getting what I was entitled to and I... am so glad Garling and co took on that responsibility to help me,I still have some way to go but Kerry Byrnes and her team have gone above and beyond for me I am so grateful I had her in my corner,I highly recommend Garling and co I don’t know where I would be now if not for guidance and understanding THANKYOU Kerry and team I am 1 happy customerread more
steve J.
00:38 29 Sep 25
Brilliant Service and I am always kept well informed. Definitely recommend this law firm to anyone seeking compensation lawyers. I really appreciate and thank Matthew and his wonderful team for their... incredible and sincere hard work they have put in for my case in the last couple of years. My family and I are blessed and very satisfied with our outcome. God Bless you Matthew Garling and your team.read more
Mark W.
10:50 17 Sep 25
Garling and Co. are an exceptional outfit. Matthew Garling is a talented lawyer and supported and surrounded by a great team of people including Allison Luck and others. What made Matthew... particularly impressive with my case were his ability to communicate complex legal processes and simplify options for the next steps, his genuine interest in the law, and his passion to seek appropriate compensation on my behalf. He was not ready to settle my case until I was ready to settle the case. I am very grateful to have had Garling and Co. 'in my corner' and would not hesitate to recommend this business to others.read more
Elyce
22:22 06 Sep 25
I never imagined this chapter would close, but it finally has.I cannot thank Joelle enough for the incredible support she gave me during one of the most challenging times in my life.Her... professionalism and genuine care throughout my claim process exceeded all my expectations.Whenever I contacted Garling and Co to speak with Joelle, I was assisted by Lynn. She was always polite, clear, and concise, and consistently showed empathy whenever I called or emailed.read more
Anonymous 1.
22:02 04 Sep 25
I was referred to Garling & Co Lawyers, after previously retaining another law firm who failed to progress my matter for a period verging on three years.This was extremely frustrating and damaging,... causing me a lot of unnecessary stress and unreasonable delays. After my first conference with Matthew, he understood the challenges that I had faced and that I wanted to resolve my matter with the defendant reasonably and in a timely manner.My matter was resolved at mediation and during the process, Matthew and Dallas Morgan (barrister), professionally communicated the procedure to me and they negotiated a reasonable settlement, that I was comfortable in accepting.Thank you to Matthew and Allison for being patient with me during the most challenging time of my life. I can now move on with my life and heal. Had I not retained Garling & Co Lawyers, I highly doubt my matter would ever have been resolved.read more
Sammy R.
01:07 04 Sep 25
Garling and Co have been the best lawyers. Kerry and Matthew have worked and been working on my case for a long time now. They have worked so hard and fought for my case every step of the way. They... are highly experienced in what they do, and are compassionate at the same time. I highly recommend this firm. My life changed in an instant when I was hit by a car, I will be forever grateful for the help they've given me. 10/10read more
Donelle L.
20:37 11 Aug 25
So very happy with the service Garling has provided with both of my claims from the start to the end cannot thank them enough Mathew and the team are the best
Rachel J
01:46 09 Aug 25
The level of service that Garling & Co provides is truely unmatched.Thank you to both Matthew and Allison for your professionalism & dedication throughout my journey of being a client.Matthew... provided me with genuine, factual and straightforward advice throughout the process and this made things easy to understand and put any uncertainty I had to rest. A complicated process ran smoothly and I always felt supported, knew where things were at and that I was in good hands.The communication at Garling & Co is exceptional. Every question I had, whether by email or phone was responded to in a timely manner and at every stage I was confident Matthew would be guiding me through the next steps - which he did, until my case was finalised.Thank you for upholding clients dignity and respect, these are values people like me need in such critical times of their lives. As a client, it is clear these values shine through. You provided me with a safe space where I was able to focus on my day to day challenges caused by my injuries, while you took care of the legal aspect on my behalf.Lastly, I’m grateful for your commitment to the work that you do and the care that you provide to people who find themselves in unfortunate circumstances beyond their control. And thank you so much for the very positive outcome that I received.read more
Ros P.
07:12 29 Jun 25
Staff polite, clear and concise. Explained well in a logistical manner. Overall a great service.
University of Technology, Sydney
Member of Law Society of New South Wales
Law Society of NSW Specialist Accreditation
University of Sydney
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University of Technology, Sydney
Member of Law Society of New South Wales
Law Society of NSW Specialist Accreditation
University of Sydney
Legal Profession Admission Board of New South Wales
The law society of nsw professional standards scheme logo.
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