The Experience Rating programme
The Experience Rating programme affects how much your business pays for its Work levy. Depending on your health and safety performance, your levy invoice could receive a discount, a loading, or stay the same.
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A safer workplace means fewer injuries, few ACC claims, and less time off work. Experience Rating makes levies fairer by reflecting your health and safety performance.
If your business has paid a Work levy for at least three years, you may be included in the programme if you’ve paid a Work levy over $10,000 for three consecutive years.
Experience Rating programmes
To be part of our No Claims Discount Programme, we look at your annual Work levy over a three-year period.
You'll be eligible if you:
- earned above the full-time minimum liable income for each of those years, and
- paid less than $10,000 in any one of those three years.
No Claims Discount
Your claims history for work-related injuries over the three-year period will determine whether:
- you get a discount
- you get a loading
- your Work levy will stay the same.
How you'll get a discount
You'll get a 10% discount on your Work levy if over the three-year period your business has had:
- no weekly compensation days, and
- no fatal claims.
No changes to your Work levy
Your Work levy will stay the same if over the three-year period your business has had:
- between 1 to 70 weekly compensation days, and
- no fatal claims.
How you'll get a loading
You'll get a 10% loading on your Work levy if over the three-year period your business has had:
- more than 70 weekly compensation days, or
- any fatal claims.
Your business is part of Experience Rating if you, or your business group, has paid a Work levy of $10,000 or more a year, for three years in a row.
What is a business group
When businesses share common ownership, we group them together. We determine if you're in a business group by looking at the shareholdings. Each member will pay an ACC Work levy based on their individual liable earnings, but the Experience Rating modifier will apply across the whole group.
Experience Rating is part of the ACC Work levy
There are a few steps to calculate your ACC Work levy and, for some, Experience Rating is one of them.
On the Work levy invoice, you’ll see a Work Account levy amount. This is a base calculation that considers the industry you operate in and the total liable earnings of all your employees.
Getting a discount or a loading
Through the Experience Rating Programme, you could get up to 50% ‘discount’ off your Work levy, or up to 100% ‘loading’. To work that out, we look at your claims history for work-related injuries and fatal claims over the Experience Period.
This Experience Rating adjustment is then applied to your Work levy.
How we calculate and apply Experience Rating
By comparing this against your industry, we calculate if you’ll get a discount or a loading, and by how much. We consider:
- the number of weekly compensation days your employees have
- the number of claims for your employees with medical and treatment costs of over $750
- any fatal claims.
Older claims have less of an influence on your discount or loading, so your more recent history becomes more important.
Over the three years, claims in:
- year 1 (most recent year) receive a 100% weighting
- year 2 receive a 70% weighting
- year 3 receive a 40% weighting.
This provides an opportunity for businesses to reduce their Work levy by preventing injuries and helping employees return to work sooner.
We publish quarterly claims reports on our online platform MyACC for Business to help you keep track of your how you're doing.
Members of a business group will receive the same Experience Rating adjustment which reflects its overall performance. Where a group has members involved in multiple industries, the final adjustment reflects the group’s size and performance in those industries.
What’s changing from 1 April 2026?
We’re making changes to improve the fairness of levies, including updates to the Experience Rating programmes.
- No Claims Discount is ending: the programme hasn’t delivered the expected health and safety improvements, and businesses outside the programme currently fund the discount.
- Experience Rating changes: an additional Experience Rating Programme rate (currently 7.2%) will apply to all businesses in Experience Rating. This will show as a single Work Levy (ER) rate, separate from any loading or discount you receive.
Experience Rating resources
This resource explains how the Experience Rating programme affects your business and your work levy.
This resource explains how the Experience Rating programme affects business groups and their work levy.
This resource explains the Experience Rating programme for intermediaries and how it affects their clients' work levy.
Supporting recovery at work
There are two ways a business can reduce its Work levy, by preventing injuries in the workplace and supporting injured employees to recover at work.
As an employer, playing an early and active part in an injured employee's recovery also has other benefits. Creating a plan to get them back into the workplace sooner can mean:
- holding on to vital skills and knowledge
- saving on recruiting and training new staff
- reducing the cost of lost productivity.
Supporting your injured employee to recover at work
Contact us
For more information about Experience Rating and how it affects your Work levy, contact your relationship manager, or get in touch with the Business team.
Email er@acc.co.nz
Last published: 8 December 2025