Permanent Impairment Calculator

Issa Rabaya

Written by

Issa Rabaya

Principal Lawyer and Director · Last updated 3 July 2026

Key takeaway: In NSW you generally need a whole person impairment (WPI) rating of at least 11% (or 15% for psychological injuries) to receive a permanent impairment lump sum for a work injury, and 11% WPI to claim pain and suffering after a motor vehicle accident. Ratings above 20% unlock weekly payments until retirement age and medical expenses for life.

Permanent Impairment Calculator: Quick Answers

What whole person impairment percentage do I need for a permanent impairment payout in NSW?
For NSW workers compensation, non-exempt workers need a whole person impairment (WPI) rating of at least 11% for physical injuries, or at least 15% for psychological injuries, to be eligible for a permanent impairment lump sum. For motor vehicle accident claims in NSW, the minimum is 11% WPI to claim pain and suffering compensation.
How is a permanent impairment rating calculated in NSW?
A trained permanent impairment assessor rates your injuries against the American Medical Association Guides and the NSW Permanent Impairment Guidelines. Your condition must first be stable, meaning you have reached maximal medical improvement (MMI). For psychological injuries, the assessor rates how the impairment interferes with 6 main daily living activities, such as self-care, communication and travel, before setting your whole person impairment percentage.
Does a permanent impairment claim reduce my other workers compensation benefits?
No. Unlike common law claims, a permanent impairment claim does not affect your other entitlements, so there is no financial downside to pursuing it. In fact, a higher rating can increase your benefits: above 20% WPI you can continue weekly wages beyond 5 years until retirement age and claim medical expenses for life.

Every year more than a hundred thousand people get seriously injured due to workplace accidents. Even though all the precautions are taken, they could sometimes be inevitable.

permanent impairment calculator

The good news is that the number of fatalities has been decreasing each year and injured Australians are generally entitled to claim compensation benefits and also a whole person impairment payout depending on the extent of their injury. Now let’s have a deeper look at what Whole Person Impairment (WPI) is and how permanent impairment is calculated.

smiling worker after permanent impairment benefit

What is permanent impairment?

Permanent impairment is a stable deteriorated health condition that does not improve with medical treatment. Permanent impairment may prevent the injured person from working and even conducting daily activities. Generally only people who are injured and make a compensation claim  get a permanent impairment assessment.

The finding as to permanent impairment is usually made based on the American Medical Association’s Guides to the Evaluation of Permanent Impairment and Permanent Impairment Guidelines. The Guides are essentially the criteria for the determination of an injured person’s payment for lump sum for workers compensation claims or entitlement for pain and suffering for motor vehicle accident claims.

female worker curly hair

What injuries can cause permanent impairment?

Both physical and psychological injuries can be considered a permanent impairment. Some common examples can be seen below:

Physical injuries

Psychological injuries

  • Major depression
  • Psychotic depression
  • Bipolar disorder
  • Post-traumatic stress disorder (PTSD)

For both injury types, you usually must be able to provide medical or clinical evidence to prove your permanent impairment. Permanent impairment ratings criteria does include symptoms however most of the times symptoms alone would not render an injured person a whole person impairment rating. That’s why the extent of your injury is the key when it comes to determining your permanent impairment.

payout calculation

What is a permanent impairment payout?

Permanent impairments payouts are awardable by way of a lump sum payment in addition to other benefits like weekly wages, medical expenses, and domestic assistance. Unlike common law claims, permanent impairment claims do not affect other entitlements; that’s why there isn’t any financial consequence to pursuing it and in fact depending on the whole person impairment rate, it can increase your other benefits and the duration of how long you continue to receive those benefits.

The whole person impairment is the most important variable for permanent impairment eligibility. In NSW, excluding exempt workers, the minimum whole person impairment is 11% to be eligible for a permanent impairment payment. In NSW, for motor vehicle accident claims, the minimum whole person impairment is 11% to be eligible to claim pain and suffering compensation.

Whole Person Impairment Payout Amounts

Whole person impairment payout amounts are determined based on the whole person impairment rating. You can find the table of workplace-related non exempt workers permanent impairment payments below:

Whole Person Impairment Table NSW

Permanent Impairment RatingPayout Amount
0% - 10%$0
11% - 15%$24,810 - $37,770
16% - 20%$41,010 - $53,970
21% - 25%$57,210 - $70,170
26% - 30%$73,410 - $86,370
31% - 35%$91,700 - $113,060
36% - 40%$118,400 - $139,760
41% - 45%$145,100 - $166,460
46% - 50%$171,800- $193,160
51% - 60%$267,270 - $341,270
61% - 70%$415,280 - $489,280
71% - 100%$563,270 - $637,290

Table 1: Whole Person Impairment Payout Amounts

Whole person impairment calculator

How is a permanent impairment rating calculated?

Permanent impairment ratings are assessed by permanent impairment assessors who assess the claimant’s injuries and disabilities alongside the Guides to determine the whole person impairment rating if the assessor first determines the injuries have stabilised. The assessor also consider the injured person’s pre-injury state to understand if the impairment has arisen due to the most recent incident.

An impairment is not considered permanent until the findings show that the medical condition is stabilised, in other words, the injured person has reached maximal medical improvement (MMI).

medical doctor permanent impairment

Determining the impairment ratings

The assessor will be assessing each referred body/organ system to determine an injured person’s impairment rating, they consider all the criteria as per the Guides, applicable to the condition, which includes performing daily activities, and estimates the degree to which the medical impairment is connected to these activities.

Main daily activities for permanent impairment assessment

For psychological injury assessments, the assessor needs to consider 6 main daily living activities as per the Guides when assessing the degree to which the medical impairment interferes with these activities.

  1. Self-care and personal hygiene
  2. Communication
  3. Physical activity
  4. Sensory functions
  5. Non-specialised hand activities
  6. Travel
  7. Sexual function
  8. Sleep

Permanent impairment examples

Injury typePermanent impairment rating
Surgically treated herniated disk injury 12%
Partial Epilepsy20%
Lumbar fracture (permanent compression)22%
Thumb amputation23%
Herniated Cervical Disk Post diskectomy and Fusion38%
Episodic Loss of Consciousness45%
Severe burn scarring and shortness of breath50%

Table 2: Permanent impairment examples

What are permanent impairment benefits?

The permanent impairment benefits are included into Workers Compensation benefits.

Permanent impairment ratingPermanent impairment rating
0% and greater• Weekly payments during periods of incapacity
• Medical and rehabilitation expenses for treatment
• Travel expenses
11% and greater• Lump-sum compensation for permanent impairment
15% and greater• Work Injury Damages/Common Law Payout
• Domestic assistance

Table 3: Permanent impairment benefits per impairment rate 

How does my whole person impairment rating affect my other workers compensation benefits

  • If your injuries are determined to be greater than 20% whole person impairment than you can continue to claim wages beyond 5 years until the age of retirement and medical expenses for life.
  • If the whole person impairment is below 11%, the insurer will stop paying for medical expenses either 2 years after the weekly payments ended or 2 years from the date of claim.
  • If the injury is assessed between 11% – 20% permanent impairment, then the injured person is entitled to 5 years’ payment of medical expenses and wages.

How to claim permanent impairment benefits?

NSW workers compensation benefits include a permanent impairment payment, known as a lump sum payment if your physical injuries, for non-exempt workers are assessed at 11% whole person impairment or greater or 15% whole person impairment or greater for psychological injuries. If your injuries are assessed at 15% whole person impairment you could also be entitled to a lump sum payout by way of making a common law claim, also known as a work injury damages claim.

Permanent impairment claims lawyers

Personal injury lawyers at Withstand Lawyers simplify the legal procedure to make it easy to understand for their clients. The work injury lawyers are approved by the Independent Review Office which means all your legal costs for your workers compensation claim are covered by Independent Review Office (IRO).

The team at Withstand Lawyers is conventionality located in Sydney, Parramatta, Liverpool, Penrith, Central Coast, Newcastle, Wollongong, Wagga Wagga, and other locations in NSW.

Permanent Impairment FAQs

What whole person impairment percentage do I need for a permanent impairment payout in NSW?
For NSW workers compensation, non-exempt workers need a whole person impairment (WPI) rating of at least 11% for physical injuries, or at least 15% for psychological injuries, to be eligible for a permanent impairment lump sum. For motor vehicle accident claims in NSW, the minimum is 11% WPI to claim pain and suffering compensation.
How is a permanent impairment rating calculated in NSW?
A trained permanent impairment assessor rates your injuries against the American Medical Association Guides and the NSW Permanent Impairment Guidelines. Your condition must first be stable, meaning you have reached maximal medical improvement (MMI). For psychological injuries, the assessor rates how the impairment interferes with 6 main daily living activities, such as self-care, communication and travel, before setting your whole person impairment percentage.
Does a permanent impairment claim reduce my other workers compensation benefits?
No. Unlike common law claims, a permanent impairment claim does not affect your other entitlements, so there is no financial downside to pursuing it. In fact, a higher rating can increase your benefits: above 20% WPI you can continue weekly wages beyond 5 years until retirement age and claim medical expenses for life.
What happens to my medical expenses if my whole person impairment is below 11%?
If your whole person impairment is assessed below 11%, the insurer will stop paying your medical expenses either 2 years after your weekly payments end or 2 years from the date of your claim, whichever applies. This is why an accurate impairment assessment matters so much to the long-term value of your claim.
What benefits do I get with a whole person impairment between 11% and 20%?
If your injury is assessed between 11% and 20% whole person impairment, you are entitled to 5 years of weekly wage payments and 5 years of medical expenses, on top of the permanent impairment lump sum itself. Your rating directly controls both the lump sum amount and how long your other benefits continue.
Can I claim a work injury damages payout on top of my permanent impairment lump sum?
Yes, in some cases. If your injuries are assessed at 15% whole person impairment or greater, you may also be entitled to a further lump sum through a common law claim, known as a work injury damages claim. This is separate from, and in addition to, the statutory permanent impairment payment.
What injuries can qualify for a permanent impairment assessment?
Both physical and psychological injuries can qualify once they are stable. Common physical examples include nerve damage, hearing loss, amputation, spinal cord injuries, burn injuries and Complex Regional Pain Syndrome. Psychological examples include major depression, bipolar disorder and PTSD. Physical injuries need at least 11% WPI, and psychological injuries at least 15% WPI, for a lump sum in NSW workers compensation.
Who pays the legal costs for my permanent impairment claim?
For NSW workers compensation claims, lawyers approved by the Independent Review Office (IRO) have their legal costs covered by the IRO, so the claim costs you nothing out of pocket. Withstand Lawyers is IRO approved and runs permanent impairment claims on this basis, with a 99% success rate. Call 1800 952 898 for a free claim check.
Issa Rabaya, Principal Lawyer and Director at Withstand Lawyers

About the author

Issa Rabaya · Principal Lawyer and Director

Admitted to the Supreme Court of NSW and High Court of Australia   LLB   IRO-approved   Law Society of NSW

Acts for injured people in CTP, workers compensation, TPD and public liability claims.

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Why Choose Withstand Lawyers for Your Permanent Impairment Claim?

When a serious injury changes what your body or mind can do, the right support changes what happens next. Withstand Lawyers has spent decades helping seriously injured people secure the permanent impairment payouts they are entitled to, recovering more than $47M+ for clients with a 99% success rate. From your first free claim check, Withstand Lawyers explains your whole person impairment assessment in plain language, arranges the right assessors and challenges low ratings that cut your benefits short. Because Withstand Lawyers works on a no win no fee basis, you pay nothing upfront and nothing unless your claim succeeds.

Call 1800 952 898 for a free claim check. No win, no fee, no upfront costs.

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