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The Future of NZ Super - What's Changing and What You Can Do About It

If you're planning to retire on NZ Super at 65, the government's own Treasury projections show the current system can't continue. This guide breaks down what's likely to change and how to prepare yourself.
Updated 8 January 2026
Summary
  • The problem: NZ Super costs are growing faster than the economy can sustain. By 2065, there will be just two workers for every retiree (down from seven in the 1960s), and government debt will hit 200% of GDP if nothing changes.
  • Something will change: The Treasury says the question isn't whether to reform NZ Super, but how and when.
  • What is the government doing: The Treasury is modelling the future costs New Zealand taxpayers will face and recommending policy changes to make them manageable. But here's the problem - no political party is currently proposing NZ Super reform.
  • Soon, there will be a change, but New Zealanders need to prepare now: The Treasury is sounding the alarm; politicians aren't acting on it. That's why you need to prepare yourself rather than wait for official changes.
  • This guide is based on the Treasury's own findings - we explain where they come from and why they matter.

Know This First: What Is The Treasury Report and Why Should You Care?
  • Every four years, the Treasury publishes He Tirohanga Mokopuna – the Long-term Fiscal Statement. It's a 40-year projection of New Zealand's government finances.
  • The September 2025 edition is the sixth such report, and its message is the starkest yet.
  • The core finding is alarming: If nothing changes, government debt will rise from about 43% of GDP today to 200% of GDP by 2065 - the Treasury is projecting debt will increase nearly fivefold as a share of our economy.
  • This matters to you because something will change - the Treasury explicitly states that "The choice is not whether to change, but how to change and when".
  • The likely targets are NZ Super (raising the age, cutting payments relative to wages, or means testing), taxes (income tax, GST, or both), and health funding.
  • We believe the New Zealanders who understand what's coming and plan accordingly will be far better off than those who assume the status quo will continue. The purpose of this guide is to give you that understanding.

To help you understand the most important aspects of the Treasury's report, this guide covers:
Important: This guide is for informational purposes only and does not constitute financial advice. We have published our interpretation and analysis of Te Ara Mokopuna: Treasury's 2025 Long-term Insights Briefing to help prepare New Zealanders for a retirement without the level of NZ Super we see today. 

The Important Numbers - What's Actually Happening

The Demographic Shift

New Zealand's population is ageing rapidly. This single fact drives most of the fiscal pressure. Here's the shift in stark terms:
Period Workers (15-64) per Retiree (65+) What It Means
1960s 7 to 1 Seven workers supporting each retiree
Today (2025) 4 to 1 Four workers per retiree
2065 (projected) 2 to 1 Just two workers per retiree
Important: When there were seven workers for every retiree, funding universal superannuation was straightforward. When it drops to two workers per retiree, the costs of funding retirees isn't sustainable without major changes.

The Spending Projections

The Treasury projects government spending will grow from about $18,300 per person today to $35,900 per person by 2065 (in inflation-adjusted terms). That's nearly double. Here's where the increases come from:
Category 2024/25 2064/65 Change
NZ Superannuation $2,980 $6,412 +115% (more than doubles)
Health $3,977 $8,128 +104% (doubles)
Interest on Debt $1,136 $7,253 +539% (more than 6x)
Defence $427 $1,640 +284% (commitment to 2% GDP)
Other welfare $3,079 $3,707 +20% (modest growth)
Education $2,690 $3,537 +31% (slower growth)
TOTAL per person $18,281 $35,916 +96%
Note: Figures in 2009/10 dollars, per person, from the Treasury Long-term Fiscal Model (LTFM). The interest cost explosion is particularly alarming – if debt grows as projected, interest payments alone would consume more resources than current NZ Super spending.

NZ Super: A Huge Ongoing Cost

The Treasury makes it clear - NZ Superannuation currently costs about 5% of GDP, and without changes, it will grow to 8% of GDP by 2065. In dollar terms, that extra cost is enormous – and the growth is relentless because it's driven by demographics that cannot be reversed.
Year NZS as % of GDP Approx. Annual Cost Recipients (est.)
2006 3.9% ~$8 billion ~500,000
2025 5.1% ~$22 billion ~900,000
2065 8.0% ~$155 billion ~1.8 million
The fundamental issue is simple - NZ Super is paid from current taxation. When the number of recipients grows faster than the number of taxpayers, the situation becomes unstable.

What Changes Are Coming?

The Treasury outlines three main options for NZ Super reform. At least one – and probably a combination – will be implemented over the coming decades:

Option 1: CPI Indexation (Cutting Real Value)

Currently, NZ Super is indexed to wages, meaning it rises with average incomes. If switched to CPI (inflation) indexation, NZ Super would maintain purchasing power but gradually fall behind average incomes. The Treasury explains the likely effects and challenges:
  • Fiscal impact: Keeps NZ Super stable as a percentage of GDP
  • What it means for you: Your pension would still buy the same goods, but you'd become relatively poorer compared to working New Zealanders
  • Treasury estimate: By 2065, NZ Super would be worth significantly less relative to average wages than today
  • Who wins: Future taxpayers (lower tax burden)
  • Who loses: Future retirees (lower relative income)

Option 2: Raising the Age of Eligibility

The Treasury modelled raising the age from 65 to 68 by 2040 (adding one year in 2030, 2035, and 2040). Their finding was that this alone wouldn't stabilise NZ Super costs. The Treasury explains the likely effects:
To keep NZ Super at current % of GDP Age of eligibility required
By 2065 72 years old
And continuing to rise thereafter Keeps rising with life expectancy
Key insight: Even raising the age to 68 would only slow the growth – NZ Super would still increase from 5.1% to 7% of GDP. To actually stabilise costs, the NZ Super age would need to reach 72 by 2065.

Option 3: Means Testing

Means testing would reduce or eliminate NZ Super for those with other income or assets. The Treasury's analysis suggests that means testing would need to kick in at relatively low income levels to generate meaningful savings. The Treasury explains the likely effects and challenges:
  • Protects the poorest retirees (those most reliant on NZ Super)
  • Would require the removal of low-income PAYE thresholds to make a real fiscal difference
  • Creates disincentives to save for retirement (why save if it costs you your pension?)
  • Means testing adds complexity and compliance costs

The Tax Scenario - What If Nothing Else Changes?

If governments refuse to touch NZ Super or other spending, taxes would need to rise substantially:
Option 2025 Rate 2065 Rate Required
Average income tax rate 21% 32%
Or GST alone 15% 32%
Our view: No government will let the average income PAYE tax rate reach 32% or for GST to increase to 32%. This means spending changes (including to NZ Super) are virtually certain - the only questions are timing and design.

What This Means For You - Understanding the Future of NZ Super By Age Group

The Treasury's modelling shows different generations will be affected differently. Here's our analysis of what it means for you:

If You're Under 35 (Born 1990 onwards)

You will likely benefit from reforms: The Treasury's modelling shows that people born after a date that ranges approximately from 2008 to 2037 (depending on the reform scenario) would be better off under most NZ Super reform scenarios. You'll pay lower taxes over your working life than you would under the status quo, and the economic growth from fiscal sustainability will boost your lifetime income.

Key planning actions to consider: Maximise KiwiSaver contributions now (compound growth is your superpower), assume NZ Super eligibility will be 68-70+ when you retire, and plan for 25+ years of retirement funding largely from your own savings.
Important: Why Reform is Likely Good News for Under-35s (even if it may not sound positive)
  • It seems counterintuitive - how can receiving less NZ Super be better for young people? The Treasury's modelling reveals the answer: the alternative isn't "keeping things as they are."
  • The alternative is either significant future tax increases or economic decline from unsustainable debt.
  • We explain the options and costs below:

Scenario A: No reform (delay for 40 years)
  • Average income taxes jump from 21% to 36% by 2066
  • Annual income per person is $6,800 lower due to weaker economic growth
  • Young people pay higher taxes their entire working lives to service accumulated debt

Scenario B: Reform now
  • Average income taxes rise gradually to 32% (not 36%)
  • Stronger economic growth boosts lifetime incomes.
  • NZ Super will be less generous, but the combination of lower taxes + higher incomes + still receiving a pension delivers better lifetime outcomes.

Know This: The Treasury's research found that for median-income earners, everyone born after 2037 comes out ahead under reform. For higher earners, the breakeven point is even earlier (born after 2001). The message is clear - the cost of inaction falls hardest on today's young people.

Our view: For under-35s, the status quo isn't security - it's compounding debt with your name on it at terms you'd never accept.

If You're 35-50 (Born 1975-1990)

You're in the transition zone – you can act now: This is the most challenging position. You've already paid substantial taxes that funded earlier generations' retirement, but you may receive reduced NZ Super yourself. The Treasury's modelling suggests people born around 1970-2000 bear the highest transition costs under most reform scenarios.

Key planning actions to consider: This is your critical decade for wealth building. Maximise KiwiSaver contributions, consider additional savings/investments, plan for NZ Super at age 67-68 (not 65), and assume payments may be lower relative to wages than today. Property ownership remains important – the wealth gap between owners and renters is 10x per our wealth statistics analysis.

If You're 50-65 (Born 1960-1975)

You have the most to lose from reforms – but also the most certainty.
If you're already 60+, any age eligibility changes will almost certainly grandfather you in. If you're 50-60, you may see the eligibility age rise to 66-67 for your cohort. The Treasury notes that preannouncing changes 20 years in advance significantly reduces negative impacts, so changes affecting you will likely be modest.

Key planning actions: If you haven't already, make a concrete retirement plan now. Know exactly what you need NZ Super to provide. Consider working longer if you can – 49% of 65-69-year-olds now work, and it dramatically improves retirement outcomes. Maximise savings over the next 10-15 years.

If You're 65+ (Already Receiving NZ Super)

Know This - Your benefits are largely protected for the rest of your life
  • Politically, it's nearly impossible to reduce benefits for current recipients. You may actually benefit from some reforms – for example, if income taxes are cut to fund NZ Super changes, your after-tax income would increase (since NZ Super is linked to after-tax wages).
  • The main risk is a switch to CPI indexation, which would gradually erode your position relative to working New Zealanders.

Key planning actions: Focus on making your savings last. Plan for potential healthcare cost increases (these are rising faster than inflation). Consider whether downsizing or accessing home equity may become necessary in later years.​
Our table below explains the above four situations based on your age:
If You Were Born Your Age in 2025 Likely Impact of Reforms Key Planning Priority
Before 1960 65+ Minimal - benefits largely protected Make savings last; plan for healthcare costs
1960-1975 50-65 Moderate - may see age rise to 66-67 Concrete retirement plan now; consider working longer
1975-1990 35-50 Significant - transition generation bears highest cost Critical decade for wealth building; maximise savings
After 1990 Under 35 Net benefit - lower taxes, economic growth Plan for NZ Super at 68-70+; compound growth now

Your Action Plan - What To Consider Doing Differently Right Now

Understanding the problem is one thing, but acting on it is another. To help you prepare ahead of the Treasury's projections, we suggest considering the following wealth-growing steps:

Increase Your KiwiSaver Contributions

KiwiSaver currently represents just 5.7% of total household wealth in New Zealand per our household wealth research, while property is 48.5%. This imbalance is a vulnerability – you cannot spend your house in retirement (without using a reverse mortgage or a home equity product), and relying solely on property for retirement is risky. Overall:
  • If you're under 40, you may want to consider making 6-10% contributions rather than the default.
  • If you're 40-55, this is your last chance for meaningful compound growth – maximise contributions
  • If you're 55+, every extra dollar helps, but focus also on preserving what you have

Plan for a Later Retirement Age

Whether or not the official age changes, working longer is one of the most powerful financial levers available:
  • Each year you work past 65 adds to your savings AND reduces the years you need to fund
  • 49% of New Zealanders aged 65-69 are now in the workforce (up from 10% in 1993)
  • Consider what work you could do at 67-70 – part-time, consulting, or employment in a different industry
  • Invest in your health now to enable working longer later

Build Multiple Income Streams

Relying solely on NZ Super is increasingly risky. Consider building:
  • KiwiSaver (your primary retirement vehicle)
  • Additional investments outside KiwiSaver (index funds, managed funds)
  • Property equity (if you own, this is likely your largest asset)
  • Skills that enable later-life earning, such as part-time work​

Get Into Property If You Can (But Don't Over-Commit to Unaffordable Long-Term Mortgage Struggle)

The data is stark, as shown in the table below from our household wealth guide.

Important: Property ownership provides housing security (no rent in retirement), a potential asset for downsizing or drawing equity from, and historically strong wealth accumulation. If you're not yet a homeowner, this should be a priority. This does not imply you should consider an investment property purchase - our guide to the risks, and on our list of investment traps to avoid when accessing KiwiSaver funds at 65.
Housing Status Mean Net Worth
Own home - no mortgage $1,809,000
Own home - with mortgage $934,000
Renting $185,000
Gap (owners vs renters) 9.8x difference

Don't Count on Inheritance

45% of households have received an inheritance or substantial gift, per our wealth statistics, and their median wealth is nearly double that of everyone else. But there are reasons to be cautious:

Understand Your Health Trajectory

Health costs are the wildcard in long-term planning. The Treasury projects health spending to rise from 7.1% of GDP to 10% by 2065 per the report. What this means for you:
  • Private health insurance may become more important as the public system is stretched
  • User-pays elements may increase (this is one option the Treasury identifies)
  • Your own health investment now (diet, exercise, preventive care) is your best protection
  • Consider getting quotes for health insurance, especially if you're 40+

Political Signals to Watch For Likely Indicating Changes to NZ Super, Tax Rates and Health Funding

The Treasury has laid out the options and we know politicians will eventually act. Here's what to watch for:

1) Signs NZ Super changes are coming:
  • Cross-party discussions or working groups on superannuation
  • Preannouncement of changes 10-20 years ahead (the Treasury recommends this approach)
  • Changes to the NZ Superannuation Fund contribution formula

2) Signs tax increases are coming:
  • GST increase (less politically toxic than income tax rises)
  • Delayed inflation adjustment of tax brackets (stealth tax through fiscal drag)
  • Capital gains tax or wealth tax proposals (broadening the tax base)
  • User charges for previously free public services

3) Signs health funding is being rationed:
  • Longer wait times for elective procedures
  • Reduced Pharmac coverage or increased co-payments
  • Push towards preventive care and wellness programmes
  • Incentives for private health insurance​

The Bigger Picture: Why This Is Happening

​New Zealand's fiscal challenge isn't unique. Most developed countries face similar demographic pressures. What makes New Zealand's situation notable:
  1. Universal, non-means-tested pension: NZ Super is generous by international standards, as everyone receives the same amount until they die.
  2. Relatively low retirement savings culture: KiwiSaver only started in 2007 and is voluntary, and the average balance remains low compared to the costs of retirement
  3. There is heavy reliance on property wealth, which isn't liquid: 48.5% of all assets per our research, which is vulnerable to market cycles
  4. Weak productivity growth: Just 0.7% annually over the past 20 years, limiting economic growth, given the popularity of buying and selling property

The Treasury's message is clear: These challenges can be managed if we act early. Starting now means smaller, more gradual changes. Waiting means larger, more disruptive changes later. The government that acts proactively will serve New Zealanders better than one that waits until a crisis forces its hand.

MoneyHub's View:
  • The Treasury has done New Zealanders a service by publishing this document, even if few will read it.
  • The message is uncomfortable but honest - the fiscal status quo cannot continue, and changes will affect everyone differently depending on their age, income, and circumstances.
  • Those who understand what's coming and plan accordingly will be far better positioned than those who assume NZ Super at 65, at the current relative value, is guaranteed. It almost certainly isn't.
  • The best response is preparation - increase your savings rate, plan for a later retirement, build multiple income streams, and stay informed as policy changes unfold. The demographic shift driving these pressures is inevitable - but you have the power to respond and minimise the effect of the changes to come.​
Finally, we include the table below, sourced from the Treasury Long-term Fiscal Statement 2025, to show the ongoing costs and why governments will soon need to make decisions:
Metric 2025 2065 (No Change) What It Means
Net Core Crown Debt (% GDP) 43% 200% Debt nearly increases fivefold as share of economy
NZ Super (% GDP) 5.1% 8.0% Pension costs grow 57% faster than economy
Health (% GDP) 7.1% 10% Health costs grow 41% faster than economy
Workers per Retiree 4:1 2:1 Half as many workers supporting each retiree
Govt Spending per Person $18,300 $35,900 Nearly doubles in real terms

Frequently Asked Questions

While no changes have been announced, common queries below are a response to the Treasury's reports and findings.

Will NZ Super definitely change?

Almost certainly yes - The Treasury has been warning about this for 20 years, and the projections have only become more urgent. The only questions are timing, design, and which political party makes the move.

Our View: Both major parties have historically avoided the issue, but New Zealand is running out of time to cover the growing cost, and we believe this will force action.

When will changes to the NZ Super happen?

The Treasury emphasises that preannouncing changes 10-20 years ahead allows people to adjust. This means any changes announced in the late 2020s or 2030s would take effect from the 2040s onwards. New Zealanders currently aged 50+ are likely to see minimal direct impact on their NZ Super entitlements.

Should I rely on the NZ Super Fund to solve this?

No, we don't believe that would be sensible. While the NZ Super Fund is substantial (approaching 20% of GDP), withdrawals will only offset about 6-7% of NZ Super costs even by 2065. The NZ Super Fund helps at the margin but doesn't solve the underlying demographic mismatch, where too few workers have the tax burden to pay for the older New Zealanders.

What about means testing – will I lose my pension if I have savings?

If means testing is introduced, it would need to kick in at relatively low income levels to generate meaningful savings. For example, your NZ Super could be cut by 40 cents for every dollar you earn above a threshold. Treasury modelled two versions - one that only hits people earning over $60,000 (affecting fewer people), and one that starts at just $10,000 (affecting almost everyone with any other income).

However, means testing creates disincentives to save, which is problematic – it's not the Treasury's preferred option.

Is 200% debt-to-GDP as bad as it sounds? Won't the situation balance out later?

Japan has a debt of around 230% of GDP, finances it domestically, and faces different economic circumstances. New Zealand borrows internationally and would face punishing interest rates long before reaching 200%. The projection isn't a prediction – it's what would happen if nothing changes, which the Treasury fully expects won't occur. In the long term, the cost of repaying the debt would cause significant economic harm to New Zealand.

What about compulsory KiwiSaver like Australia?

Australia's Superannuation Guarantee is one model. Combined with tax concessions and a means-tested pension, Australia's pension costs are projected to remain stable as a percentage of GDP. The Treasury discusses this option and notes it could reduce pressure on future taxpayers, but creates a 'double burden' for transition generations who fund current retirees while also saving for themselves.

What should I tell my adult children?

We believe they should plan for NZ Super at 68-70+ (not 65), assume payments may be lower relative to wages than today, and save and invest aggressively now.

The good news is that if reforms happen, they'll likely pay lower taxes over their working lives than they would under the status quo. The Treasury's modelling shows people born after 2037 would benefit overall from most reform scenarios.
Sources & Further Reading