Everything Kiwi homeowners need to know about house insurance NZ â sum insured, NHC cover, exclusions, excesses, and how to avoid costly under-insurance. Read our expert guide.
House Insurance NZ: The Complete Guide to Protecting Your Home
For most New Zealanders, their home is the single largest asset they’ll ever own — and house insurance is the financial safety net between a devastating event and financial ruin. Yet many homeowners misunderstand what their policy actually covers, set their sum insured too low, or discover the gaps only when it’s too late. This guide cuts through the jargon to give you a clear, practical picture of how home insurance works in Aotearoa, what to watch out for, and how to make sure you’re genuinely protected. It’s general information, not financial advice.
What house insurance covers — and how it differs from contents
House insurance (sometimes called building insurance) covers the cost of repairing or rebuilding your home if it’s damaged or destroyed by an insured event. It’s worth being precise about terminology, because house and contents are two separate products in New Zealand.
Reference sources
- Natural Hazards Commission Toka Tū Ake — natural-hazard cover and caps: naturalhazards.govt.nz
- Consumer NZ — avoiding under-insurance and claim rights: consumer.org.nz
- Insurance Council of NZ (ICNZ) — house insurance and natural-hazard data: icnz.org.nz
- Insurance & Financial Services Ombudsman (IFSO) — free dispute resolution: ifso.nz
Contents insurance is a distinct policy for your belongings — our contents insurance guide covers that side, and an insurance adviser can help you structure both.
NHC cover and your sum insured
New Zealand’s exposure to earthquakes, tsunamis, volcanic activity and landslides makes home insurance here unique — and there are two things every homeowner must understand: the natural-hazard system, and the sum insured.
NHC cover, and getting your sum insured right
NZ’s two-layer natural-hazard system
The Natural Hazards Commission (NHC) — which replaced the EQC in 2024 — provides the first layer of cover for natural-hazard damage (earthquake, volcanic, tsunami, natural landslip, and land damage from storm/flood) when you hold a valid house policy. The building cap is $300,000 plus GST per event; damage above that, and non-natural events (fire, burst pipes), fall to your private insurer. The NHC is a floor, not a ceiling — which is why adequate private cover matters.
Sum insured = rebuild cost, not market value
Since around 2012, NZ policies cap what the insurer pays at your nominated sum insured — so if the rebuild costs more, you wear the shortfall. Insure the rebuild cost (demolition, materials, labour, professional fees and GST), not the market value (which includes land you don’t need to insure). In Auckland or Queenstown, market value can be two or three times the rebuild cost.
Under-insurance is common and costly. Rising build costs, unreported renovations and stale policies leave many NZ homes under-insured — as Canterbury homeowners discovered. Use a rebuild calculator (like Cordell Sum Sure), add demolition and ~10–15% for professional fees, check whether the figure includes GST, and review it every year at renewal.
Exclusions and excess
Understanding what your policy does not cover is just as important as knowing what it does.
Current NZ income tax brackets
For the 2025–26 tax year (and unchanged for 2026–27). Thresholds were raised on 31 July 2024 — always confirm the latest figures with IRD.
| Taxable income | Tax rate |
|---|---|
| $0 – $15,600 | 10.5% |
| $15,601 – $53,500 | 17.5% |
| $53,501 – $78,100 | 30% |
| $78,101 – $180,000 | 33% |
| Over $180,000 | 39% |
NZ uses a progressive system — you only pay each rate on the income that falls within that band, not on your whole income. So a pay rise never leaves you worse off overall. There’s no tax-free threshold: tax applies from the first dollar. The 39% top rate (on income over $180,000) was introduced in 2021.
How to compare providers
The NZ house insurance market is reasonably competitive, led by IAG (which underwrites AMI, State and NZI), Vero (behind a number of bank-distributed products), Tower, and others — our AA Insurance review and Tower Insurance review look at two well-known home and contents insurers. When comparing, don’t focus solely on the premium. Weigh up the policy definitions (how the insurer defines “flood,” “storm,” “accidental” and “gradual damage” — tighter definitions mean more potential disputes), the sum insured tools they provide, their claims reputation (check independent reviews and the FMA, which oversees insurance conduct), your excess options, useful add-ons (accidental damage, specified items, landlord extensions), and bundle discounts for holding house and contents together.
Making a claim, step by step
Knowing what to do in the immediate aftermath of a loss can significantly affect how smoothly your claim resolves. First, make the property safe — if there’s a gas leak, structural instability or fire, prioritise safety and call emergency services. Then prevent further damage (board up windows, turn off the water, tarp damaged roofing if safe), keeping receipts for emergency repairs, as most policies require you to take reasonable steps. Document everything with photos and video before any clean-up. Notify your insurer promptly — and for natural-hazard events, you may also need a separate NHC claim. Your insurer may send an assessor or ask for repair quotes from licensed builders. Finally, understand the settlement offer: if you disagree, use your insurer’s internal complaints process, then escalate free of charge to the Insurance & Financial Services Ombudsman (IFSO).
Tips to avoid being caught out
A few habits make all the difference: review your sum insured every year at renewal rather than auto-renewing; tell your insurer about renovations (a deck, a kitchen extension or a heat pump all raise your rebuild cost); read the policy document, not just the summary — the Product Disclosure Statement holds the definitions and exclusions that matter at claim time; keep a home inventory (a photo or video record stored off-site) to smooth any contents claim; and check your mortgage conditions, because your bank will almost certainly require adequate house insurance, and letting cover lapse could breach your home loan agreement.
Your next steps
Getting house insurance right isn’t a set-and-forget exercise. Pull out your current policy and check your sum insured against a current rebuild estimate — a calculator like Cordell Sum Sure (available through most major insurers) is a practical first step. If your home has been renovated, or you haven’t reviewed your cover in over a year, treat it as urgent. Compare two or three policies on both price and definitions before renewing, and consider a registered financial adviser if your situation is complex. A few hours now could save you tens of thousands of dollars when it matters most.
Disclaimer: This article is general information about house insurance in New Zealand, not financial advice, and not a recommendation of any insurer or policy. Cover, definitions, exclusions, excesses, NHC caps and premiums vary by insurer and change over time — always read the Product Disclosure Statement, confirm current NHC limits, and check your sum insured against a current rebuild estimate before relying on your cover. Consider advice from a registered financial adviser for complex situations.
Worked example: tax on $75,000
Sarah earns $75,000. Her tax is calculated in layers, not as a flat percentage (income tax only; ACC levy and any KiwiSaver/student loan are separate).
| Band | Rate | Tax |
|---|---|---|
| First $15,600 | 10.5% | $1,638.00 |
| Next $37,900 ($15,601–$53,500) | 17.5% | $6,632.50 |
| Next $21,500 ($53,501–$75,000) | 30% | $6,450.00 |
| Total income tax | $14,720.50 | |
Effective rate
~19.6%
Share of total income paid in tax
Marginal rate
30%
The rate on her next dollar earned
The two are often confused: the marginal rate tells you the cost of earning more; the effective rate is your overall burden. (At $75,000, Sarah sits in the 30% band, so her marginal rate is 30%.)
Frequently asked questions
What’s the difference between house and contents insurance?
House (or building) insurance covers the physical structure — walls, roof, floors, foundations and permanently attached fixtures like built-in cabinetry. Contents insurance covers the moveable items inside — furniture, appliances, clothing and electronics. They’re separate products in NZ, though insurers often bundle them at a discount.
What is NHC cover, and does it replace private insurance?
The Natural Hazards Commission (which replaced the EQC in 2024) provides a first layer of cover for natural-hazard damage — earthquake, volcanic, tsunami, natural landslip and land damage from storm or flood — when you hold a valid house policy, up to a building cap of $300,000 plus GST per event. It doesn’t replace private insurance: damage above the cap, and non-natural events like fire, fall to your private insurer.
What should my sum insured be?
It should reflect your home’s rebuild cost — demolition, site clearing, materials, labour, professional fees (around 10–15%) and GST — not its market value, which includes land you don’t need to insure. Use a rebuild calculator like Cordell Sum Sure as a starting point (or a registered valuer for older or high-value homes), and review it every year, as construction costs have risen sharply.
What does house insurance usually not cover?
Common exclusions include gradual damage and wear and tear (cover is for sudden, accidental events), some flood or rising-groundwater situations, gradual subsidence and earth movement, damage by vermin and pests (including borer), intentional damage, and — often — properties left unoccupied beyond a set period (commonly 60 days). Read your policy’s definitions, as they vary between insurers.
What is an earthquake excess?
Many policies apply a separate, higher excess for natural-hazard claims like earthquake — often a percentage of your sum insured rather than a flat dollar amount. A 1% earthquake excess on a $600,000 sum insured means you’d pay the first $6,000 of any earthquake claim yourself. Check the excess schedule in your policy before you need to claim.
Do I have to have house insurance if I have a mortgage?
Effectively yes — your bank will almost certainly require you to hold adequate house insurance as a condition of your home loan, and letting it lapse could breach your loan agreement. Even without a mortgage, going uninsured on your largest asset is a serious financial risk given NZ’s exposure to natural hazards.
No comments to show.
Best Brokers
Get approved fast with Finance Now. Personal loans, car finance & retail purchases – made easy for everyday Kiwis.
Shop now, pay later with Farmers Finance. Flexible payment options at Farmers stores across NZ – online and in-store.