How to Save on House Insurance in New Zealand

Why House Insurance Premiums Keep Going Up in NZ

If your house insurance renewal landed with a higher figure than last year, you're far from alone. Premiums across New Zealand have been on an upward trend for several years, and there are some significant forces behind it.

First, construction and rebuilding costs have surged. Material prices - timber, steel, plasterboard, concrete - have all increased substantially since 2020. Labour shortages in the building trades have pushed wages higher too. According to the Insurance Council of New Zealand (ICNZ), the cost of settling claims has risen sharply, and that flows directly into what you pay in premiums.

Second, New Zealand has been hit by a succession of severe weather events. The Auckland Anniversary floods in January 2023, Cyclone Gabrielle in February 2023, and ongoing flooding events across the country have generated billions of dollars in insurance claims. These events force insurers to reassess risk - particularly for properties in flood-prone or slip-prone areas. If your home is in a higher-risk zone, you may have seen your premium jump more than average.

Third, reinsurance costs have risen globally. NZ insurers buy reinsurance from international companies to protect themselves against large-scale disasters. After a string of catastrophic events worldwide, those reinsurance premiums have gone up - and the cost gets passed through to homeowners.

The Reserve Bank of New Zealand monitors the insurance sector and has noted that premium increases have outpaced general inflation in recent years. Understanding why premiums are rising helps explain why taking active steps to manage your costs matters more than ever.

Compare Insurers Every Year - the Loyalty Tax Is Real

The single most effective way to save on house insurance is also the most overlooked: compare your options at every renewal. Staying with the same insurer year after year often means you're paying more than you need to.

Insurers frequently offer their most competitive pricing to attract new customers. Existing policyholders, meanwhile, receive their renewal notice with an increase and simply pay it. This pattern - sometimes called the loyalty tax - is well documented across the NZ insurance market. Consumer NZ has highlighted this issue repeatedly.

The fix is straightforward. Two to three weeks before your renewal date, get estimates from several insurers and compare them against your renewal price. On Compare.org.nz, you can get estimates from multiple house insurers in one place, which takes the legwork out of the process. You can then visit individual insurers like Tower, AMI, or AA Insurance for actual quotes.

Even if you decide to stay with your current insurer, having competing estimates gives you leverage. Some insurers will match or beat a competitor's price if you call and ask. It won't always work, but it costs nothing to try.

The difference between the cheapest and most expensive house insurance quote for the same property can be hundreds of dollars a year. Over a decade of renewals, the savings from actively comparing can be substantial.

For a broader overview of the house insurance market, see our house insurance buying guide.

Adjust Your Excess Strategically

Your excess is the amount you pay out of pocket when you make a claim. Adjusting it is one of the most direct ways to influence your house insurance premium.

The relationship is simple: the higher the excess you choose, the lower your premium. By taking on a larger share of the cost in the event of a claim, you reduce the insurer's risk - and they reduce what they charge you. Moving your excess from $500 to $1,000 or $1,500 could reduce your annual premium noticeably.

But there's an important balance to strike. You need to be genuinely comfortable paying that excess amount if something goes wrong. A house insurance claim can come at any time - a burst pipe at 2am, storm damage after a rough night, or a fire. If a $2,000 excess would leave you financially stressed, it's set too high, no matter how much it saves on your premium.

Most NZ house insurers let you select a voluntary excess on top of their standard excess. Tower and AA Insurance both offer online tools where you can adjust your excess and see the premium change in real time. It's worth experimenting with different levels to find the right balance.

Keep in mind that some perils carry their own specific excess amounts. Natural disaster excesses, for example, are often set by the insurer and can't be adjusted. Our guide to insurance excess explains the different types and how they interact.

Get Your Sum Insured Right - Don't Over-Insure or Under-Insure

Your sum insured is the maximum amount your insurer will pay to rebuild or repair your home. It's one of the biggest factors in your premium - and getting it wrong in either direction can cost you.

Under-insuring is the more obvious danger. If your sum insured is $400,000 but it would actually cost $600,000 to rebuild your home, you could be left with a massive shortfall after a total loss. This is a well-known problem in New Zealand, and the ICNZ regularly urges homeowners to review their sum insured.

But over-insuring is a cost problem too. If your sum insured is significantly higher than what it would actually cost to rebuild, you're paying a premium based on an inflated figure. Insurers will only ever pay the actual cost of rebuilding - not more. So a sum insured of $800,000 on a home that would cost $550,000 to rebuild means you're paying extra for cover you could never claim on.

The key is to get an accurate rebuild cost estimate. This is different from your home's market value (which includes land value) or its rateable value. The rebuild cost is specifically what it would cost to demolish the damaged structure and rebuild it from scratch, including council consents, professional fees, demolition, and site preparation.

Several NZ insurers provide online sum insured calculators. Tower has one, and CoreLogic's Cordell calculator is widely used across the industry. For a more precise figure, you can commission a quantity surveyor to assess your specific property.

Our guide to calculating your sum insured walks through the process step by step. Getting this number right can save you from both premium overpayment and dangerous under-insurance.

It's worth reviewing your sum insured every couple of years, or whenever you make significant changes to your property - such as adding a room, upgrading the kitchen, or building a deck.

Multi-Policy Discounts and Paying Annually

Two of the simplest ways to trim your house insurance bill don't involve changing your cover at all - they're about how and where you buy.

Bundle your policies. Most NZ insurers offer multi-policy discounts if you hold more than one policy with them. Combining your house, contents, and car insurance with one provider can unlock discounts of 5% to 15%. AMI, Tower, and AA Insurance all offer some form of multi-policy pricing. The discount varies by insurer, but it's essentially free money for consolidating.

That said, bundling only makes sense if the combined price with one insurer is genuinely lower than buying each policy from the cheapest individual provider. Sometimes the best house insurance deal is with one insurer and the best car insurance deal is with another. It's worth running the numbers both ways.

Pay annually instead of monthly. Monthly payments are more convenient, but they almost always cost more over the year. Insurers typically charge a loading of around 5% to 10% for monthly payments - sometimes more. On a $2,500 annual premium, that loading could add $125 to $250 a year. If you can manage the lump sum payment, it's one of the easiest savings available.

If paying annually is a stretch, some homeowners set up a dedicated savings account and put aside a fixed amount each month so the annual lump sum is ready when renewal comes around. It takes a year to build up the first time, but the ongoing savings are worth the effort.

The Sorted.org.nz house insurance guide has more tips on managing insurance costs effectively.

Home Security, Alarms, and Safety Features

Insurers care about anything that reduces the chance of a claim. When it comes to house insurance, security and safety features signal to your insurer that your property is lower risk - and that can translate into premium savings.

Alarm systems. A monitored burglar alarm is one of the most recognised security features for insurance purposes. Monitored systems - where an alert goes to a security company that can dispatch a response - are valued more highly than self-monitored or local-only alarms. Some insurers offer specific discounts for homes with monitored alarms. If you've had an alarm installed, make sure your insurer knows about it.

Deadbolts and window locks. Basic security measures like deadlocks on external doors and locks on windows are standard expectations for most insurers. Some policies even require them. If you've upgraded your locks or added security stays to windows, mention it when getting your estimates.

Smoke alarms and fire safety. Working smoke alarms are a legal requirement in all NZ rental properties, but many owner-occupied homes still lack them or have expired units. Having interconnected smoke alarms throughout your home not only protects your family - it also reduces fire damage risk, which insurers factor into their pricing. Fire and Emergency New Zealand (FENZ) recommends smoke alarms in every bedroom, hallway, and living area.

Security cameras and smart home features. Visible security cameras can deter burglaries, and some modern smart home systems integrate cameras, alarms, and water leak sensors into a single monitoring platform. While not every insurer offers a specific discount for these, they reduce the overall risk of your property and may be worth mentioning.

The key with all security features is to declare them accurately when getting estimates or applying for a policy. Insurers can only factor in what they know about. If you've invested in home security, make sure that investment is working for you on your premium as well.

Reduce Risk Through Home Maintenance

Insurance is about risk. The more you can do to reduce the likelihood and severity of a claim, the better your premium outlook over time. Regular home maintenance may not give you an instant discount, but it keeps your claims history clean - which is one of the strongest factors in what you pay.

Plumbing and water damage. Burst pipes and water damage are among the most common house insurance claims in New Zealand. Maintaining your plumbing - fixing dripping taps, replacing ageing pipes, insulating exposed pipework against freezing, and knowing where your mains shut-off valve is - can prevent costly damage. Some newer policies have started to factor in the age and condition of plumbing when pricing.

Roof condition. Your roof is your home's first line of defence against weather. A well-maintained roof with no loose tiles, clean gutters, and sound flashing is less likely to leak or sustain storm damage. If your roof is nearing the end of its life, some insurers may charge a higher premium or impose specific exclusions. Keeping on top of roof maintenance protects both your home and your insurability.

Trees and vegetation. Large trees close to your house can be a risk factor. Overhanging branches can damage your roof in a storm, roots can affect foundations, and fallen trees can cause major structural damage. Keeping trees trimmed and removing any that pose a clear threat to the house is worth doing. Some insurers ask about nearby trees as part of their risk assessment.

Drainage and flooding. If your property is prone to surface water or poor drainage, improving the situation - clearing drains, installing better drainage channels, or raising stored items off basement floors - can help. Properties in flood-prone areas face higher premiums, and while you can't change your location, you can take practical steps to reduce the risk. The Sorted.org.nz house insurance guide covers some of these risk factors.

Electrical and heating. Outdated wiring and old heating systems can be fire risks. If your home still has older-style wiring or unflued gas heaters, upgrading these improves safety and can positively affect your insurance profile. An electrical warrant of fitness or updated switchboard is worth considering, particularly in older homes.

What NOT to Cut to Save Money

There's a difference between smart savings and false economies. Some things are worth paying for - and cutting them to shave a few dollars off your premium can leave you exposed to catastrophic financial risk.

Don't drop your sum insured below your actual rebuild cost. This is the most dangerous shortcut. If your home is destroyed and your sum insured doesn't cover the rebuild, you'll be left with a partially funded rebuild - or worse, no home and a gap you can't fill. The few hundred dollars a year you save is nothing compared to the tens of thousands you could lose. Use a rebuild cost calculator and keep your sum insured accurate.

Don't remove natural disaster cover. New Zealand's exposure to earthquakes, volcanic activity, storms, and flooding makes natural disaster cover essential for most homeowners. The Natural Hazards Commission (NHC) - formerly EQC - provides a base level of cover, but this has a cap. Your private insurer's natural disaster cover sits on top of the NHC amount. Removing it could leave you massively under-covered in the event of a major quake or flood. Our guide to what house insurance covers explains how the NHC and private cover work together.

Don't let your policy lapse. Cancelling your house insurance to save money, even temporarily, is one of the riskiest financial decisions a homeowner can make. A gap in cover means you're completely unprotected during that period. If something happens - even for a single day - you have no cover. And if you have a mortgage, your bank may step in and arrange (expensive) forced-placed insurance on your behalf.

Don't skip contents insurance to save on house insurance. House and contents insurance are separate policies, and some homeowners consider dropping contents cover to reduce their overall insurance bill. But if a fire or flood destroys your possessions, replacing everything - furniture, appliances, clothing, electronics - can easily cost $50,000 to $100,000 or more. The house insurance guide explains the distinction.

Don't ignore policy exclusions. Choosing the cheapest policy without understanding what it excludes is a false saving. A policy that's $200 a year cheaper but excludes gradual damage, landslip, or retaining walls might not cover the claim you actually need to make. Always read the policy wording - the Consumer NZ house insurance reviews are helpful for understanding what different policies include and exclude.