Claims, tax and law
What ACC does not cover
The list of what ACC leaves out is longer and more consequential than most New Zealanders realise, and the boundary between what is in and what is out is genuinely contested.
Last reviewed 4 September 2026 · Written and checked by the Best Life Insurance editorial team · How we get paid
In short
- Illness is outside the scheme. ACC covers personal injury caused by accident, not sickness.
- Most degenerative conditions are outside it, because wear over time is not an accident.
- Gradual process conditions are covered only within specific statutory categories, mostly occupational.
- Mental illness is covered only in limited circumstances connected to a covered injury or specified events.
- Whether a back problem is “injury” or “degeneration” is a real dispute with real financial consequences.
- Where ACC declines, the household is relying on private cover or on savings.
What this is, plainly
ACC is a personal injury scheme. The entitlement arises when there is a personal injury caused by an accident, or a treatment injury, or one of the specific work-related conditions the legislation recognises. Everything outside those categories is outside the scheme, however disabling it is and however clearly it stops you earning.
That excludes the majority of the conditions that actually take New Zealanders out of the workforce for extended periods. Cancer, cardiovascular disease, neurological conditions, autoimmune disease, chronic illness of every kind, and most mental health conditions. None of them is an accident.
It also excludes something less obvious and more contested: the slow deterioration of joints, discs and soft tissue that most working bodies accumulate. That is where the argument happens.
The grey zone: injury or degeneration
Consider a builder in his fifties with a back that has hurt for years, who lifts something at work and cannot straighten up afterwards. Is that a personal injury caused by an accident, or the natural progression of degenerative change that happened to become symptomatic on a Tuesday?
The answer decides whether ACC pays, and the answer is not obvious. ACC will generally obtain imaging and medical opinion, and the imaging on a fifty-year-old back will almost always show degenerative change, because that is what fifty-year-old backs look like. The question then becomes whether the event caused a new injury or merely revealed what was already there.
| Scenario | Usual ACC position | The practical risk |
|---|---|---|
| Clear traumatic event, healthy tissue | Covered | Low |
| Lifting strain on a back with existing degeneration | Contested — assessed on medical evidence | Cover may be declined or accepted only for a short period |
| Shoulder or knee pain of gradual onset | Generally not covered unless it fits a work-related gradual process category | High |
| Osteoarthritis becoming symptomatic | Generally not covered | High |
| Repetitive strain from work tasks | May fall within occupational gradual process provisions | Depends heavily on evidence and occupation |
| Mental health condition following a covered physical injury | May be covered as mental injury | Narrow; depends on the circumstances |
General description of how these questions are approached. Every claim is decided on its own facts and evidence under the legislation.
Gradual process, disease or infection claims exist as a statutory category, but they are tightly defined and are largely about work-related exposure — where the work involves a particular property or characteristic that caused the condition, and where the risk is materially greater than outside that work. They are not a general route to cover for wear and tear.
Not sure what cover you actually need?
That is the question an adviser is there to answer. Tell us your situation and a licensed New Zealand adviser will compare the market and come back with a written recommendation — including where you can cut cover you do not need.
No cost to you and no obligation. General information only — not personalised financial advice.
What to watch for
These are the details that decide whether the cover does what you expected. Read them before you compare on price.
- Whether your work exposes you to gradual-onset conditions, and whether your private cover excludes them.
- Whether any income protection you hold carries a back, joint or mental health exclusion.
- How your policy behaves while an ACC claim is being contested — does it pay in the meantime?
- Whether your policy’s definition of disability is based on your own occupation.
- Whether a waiting period leaves a gap between sick leave running out and cover starting.
- That an ACC decline can be reviewed and appealed, and that the process takes time you may not have.
Where an adviser makes a difference
Every New Zealand insurer writes income protection cover to its own wording, and the words are where the money is. Two policies that look identical on price can pay very differently when it matters. Closing that gap is the entire job of an adviser.
- An adviser will look at your occupation and tell you where your realistic exposure is, rather than assuming ACC has it.
- They know which insurers apply blanket exclusions on musculoskeletal history and which take a narrower approach.
- They can structure a waiting period around sick leave and any likely ACC entitlement.
- They will explain plainly what an exclusion on your policy would mean if the ACC route also fails.
There are three ways to buy life cover in New Zealand, and they are not equivalent. You can buy direct from one insurer, which means you see one product range and one underwriting appetite. You can buy through your bank, which usually means a single insurer’s product sold under the bank’s brand, often with narrower definitions. Or you can go through an adviser, who quotes several insurers at once and is required to put your interests first.
The premium you pay is the same either way. Insurers build adviser commission into their pricing whether or not an adviser is involved, so going direct does not get you a discount — it just removes the person whose job is to argue your corner at application and at claim time.
- An adviser can see which insurer is currently taking your health history on standard terms, and which one will load or exclude it.
- An adviser can structure cover across two insurers if that produces a better outcome than putting everything with one.
- An adviser handles the underwriting back-and-forth, and is the person who chases the claim when a family is least able to.
- An adviser has to document why the recommendation suits you, which is a written record you can hold them to.
What happens if you get in touch
We are a referral service, not an insurer. We do not quote premiums and we do not sell policies. What we do is put you in front of one licensed New Zealand adviser who can compare the market properly.
- 1
You tell us what you are looking at
The form takes about a minute. Nobody asks for your medical history on a web form — that conversation happens with the adviser, properly, and only once you have decided to proceed.
- 2
An adviser calls you
A licensed New Zealand adviser talks through your situation: who depends on you, what you owe, what you already have in place, and what you are actually worried about.
- 3
They compare the market
The adviser quotes across the major insurers, checks which of them will take your health history on the best terms, and puts the options side by side in writing.
- 4
You decide, in your own time
There is no obligation and no cost to you. If the answer is that you already have enough cover, a good adviser will tell you that.
Frequently asked questions
Does ACC cover back pain in New Zealand?
It depends on whether there is a personal injury caused by an accident. A clear traumatic event is generally covered. Pain that develops gradually, or that arises against a background of degenerative change, is much more likely to be declined or covered only briefly. It is one of the most commonly disputed areas in the scheme.
What is a gradual process claim?
A statutory category covering conditions caused gradually by work, where the work involves a particular property or characteristic that caused the condition and the risk is materially greater than outside that employment. It is tightly defined and is not a general route to cover for ordinary wear and tear.
Does ACC cover work-related stress?
Generally not on its own. Mental injury is covered in limited circumstances — such as arising from a covered physical injury or from specified events — rather than as a general entitlement for workplace stress or burnout. Private income protection may respond, subject to the policy wording and any exclusion.
Can I challenge an ACC decision?
Yes. ACC decisions can be reviewed and, beyond that, appealed. Advocacy services exist to help. The difficulty is timing rather than fairness: a review process runs on its own timetable while the mortgage keeps falling due, which is why private cover matters even for people who expect ACC to accept a claim.
Does ACC cover sickness caused by my job?
Only where it falls within the specific occupational disease or gradual process provisions in the legislation — certain exposures and certain conditions. General illness that happens to affect a worker is not covered simply because it affects their ability to work.
If ACC declines my claim, will my income protection pay?
It depends on your policy, not on ACC’s decision. Income protection responds to its own definition of disability, so a condition ACC calls degeneration can still be a valid income protection claim — unless the policy carries an exclusion for that body part or condition. This is exactly why exclusions matter so much.