Health Insurance or Save the Money Yourself? The Honest Comparison
The self-funding argument is a good one and it deserves a straight answer rather than a sales response.
It goes like this: health insurance premiums are money you mostly do not get back. Put the same amount in a savings account each month, and after ten years you have a real balance you own, instead of ten years of receipts. If you need private treatment, you pay for it. If you do not, you keep the money.
That reasoning is sound for a specific range of costs and breaks down completely outside it.
Where self-funding works
Predictable, bounded costs. A GP visit, a set of glasses, dental work, physiotherapy, a specialist consultation. These are budgetable, and insurance covers them badly anyway. Southern Cross Wellbeing pays $65 a GP visit, $600 a year of Pharmac-approved prescriptions, $50 a year of optometry. You will spend more than that administering the claim.
Moderate one-off procedures, if you have the savings. A single day-surgery procedure is within reach for a household with a real emergency fund.
For everything in this range, self-funding is not just viable, it is usually better, because you avoid paying an insurer's margin on costs you could absorb.
Where it fails
A cancer year. This is the case that decides the argument. Unfunded cancer drugs, registered by Medsafe, not funded by Pharmac, routinely run to six figures over a course of treatment. No ordinary savings plan absorbs that.
Note how insurers themselves treat it. Southern Cross Wellbeing covers $10,000 a year of non-Pharmac chemotherapy inside a $60,000 benefit, with optional upgrades to $100,000 or $300,000. The existence of a $300,000 upgrade tells you what the tail risk looks like.
Complex or repeated surgery in one year. Plans carry surgical limits of $300,000 to $500,000 a year because bills occasionally approach them.
Anything that arrives before you have saved enough. The savings plan works if the event is late. It does nothing if the diagnosis comes in year two.
That asymmetry is the whole point of insurance. You are not buying the average outcome, which self-funding usually wins. You are buying the bad tail, which it cannot.
What you are really buying: time
Private cover does not buy better surgery in New Zealand. It largely buys the same surgery sooner, often from the same surgeons.
At 31 March 2026 there were 196,166 people on the first specialist assessment queue, with 76,007 waiting more than four months. On the treatment queue there were 77,455, with 27,145 waiting more than four months.
Health New Zealand has been buying private capacity to work through the backlog, it signed $300 million of six-year private hospital contracts for orthopaedic cases in August 2026, with a total outsourced elective surgery budget of $942 million that year. The public system is real and it is working. It is also queued.
So the honest framing of the decision is: what is a year of waiting worth to you, in the specific case where you are waiting? For a hip at 68, a year is a large fraction of your remaining active life. For a hernia at 35, it is an inconvenience.
The hybrid most people should consider
The strongest position for a household with savings is usually not one or the other.
Hold insurance with the highest excess you can genuinely afford, and self-fund everything below it.
That gives you the catastrophic protection savings cannot provide, at a premium far below a low-excess policy, while you handle the predictable costs yourself. Accuro's excess ladder runs to $10,000; Southern Cross offers a range. On Southern Cross Wellbeing the excess applies per claims year rather than per claim, so a high excess costs you once in a bad year rather than on every procedure.
The mistake is picking a low excess because it feels safer. A low excess is expensive precisely because it pays for the things you could have paid for yourself.
The thing self-funding cannot buy back
There is one asymmetry that has nothing to do with money.
You can start saving at any age. You cannot start insuring at any age, or rather you can, but everything already wrong with you is excluded permanently.
A self-funder who decides at 55 that the maths has changed does not get to buy the policy they would have had at 35. They get a policy with exclusions on whatever the last twenty years produced.
Savings are reversible. Underwriting is not. That is the strongest argument for holding at least a high-excess policy through your thirties and forties even if the pure arithmetic looks unfavourable, and it is the argument the spreadsheet version of this debate always leaves out.
How to decide
QuoteHub reduces this to one question: if you needed $150,000 of treatment next year, where would it come from?
If the answer is savings you actually hold, self-funding is defensible and you should do it deliberately, with a high-excess policy behind it.
If the answer is a mortgage top-up, KiwiSaver hardship, or family, then you are not self-funding. You are hoping, and insurance is the product designed for that gap.
Financial advice on this site is provided by Craig Smith Business Services Limited, trading as Smiths Insurance & KiwiSaver, a licensed Financial Advice Provider (FSP712931).
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