# S-P03-H-03: We've found a cheaper house policy, but its flood excess is much higher. How risky would that be for us? Collected 11 October 2026 [Home and contents insurance study](https://nzbrands.ai/research/insurance/home-contents-insurance) ## ChatGPT Answer ID: 55a1501f-f48c-44f5-af0c-63b51b8922e0 A cheaper house insurance policy with a much higher flood excess can be a sensible saving — but it depends on how exposed your home is to flooding, how much extra you would have to pay after a flood, and how often you could realistically face a claim. In New Zealand, I'd be particularly careful about this trade-off because flood damage can be expensive, and a flood excess can leave you with a substantial bill even when your insurer covers the rest. The key question isn't just whether flooding is likely. It's whether the premium savings are worth taking on that extra financial risk. ## 1. What a higher flood excess could mean for you Imagine these three scenarios. The figures are illustrative, not estimates of your actual risk. | | Current policy | Cheaper policy | | --- | --- | --- | | Annual premium | $2,400 | $1,900 | | Flood excess | $1,000 | $5,000 | | Annual saving | — | $500 | With the cheaper policy, you'd save $500 a year but pay an extra $4,000 if you had a flood claim. Your break-even point in this example # $4,000 ÷ $500 = 8 years If you had one flood claim, it would take eight years of premium savings to recover that additional excess, assuming premiums and excesses stay unchanged. That doesn't mean a flood is likely every eight years. It means that one claim could wipe out eight years of savings. Multiple claims, or damage below the excess, could make the cheaper policy less attractive still. ## 2. How risky is flooding for your particular home? I'd think about it in three broad categories. Lower concern Your property is outside mapped flood-hazard areas, hasn't experienced flooding, and has good drainage. A higher flood excess may be a reasonable trade-off if you can comfortably afford it. Moderate concern The area has surface-water ponding, nearby streams, drainage problems or a history of localised flooding. I'd want to understand the property's exposure before switching. Higher concern The house has flooded before, lies in a mapped floodplain, sits low relative to surrounding land, or has a known history of water entering the building. I'd be reluctant to accept a substantially higher excess without strong financial reserves and a clear understanding of the risk. These are screening guidelines, not a prediction of your home's flood probability. In New Zealand, you can start by checking your local council's flood-hazard maps and asking your insurer about the property's specific risk. ## 3. An important New Zealand insurance detail The Natural Hazards Commission Toka Tū Ake provides limited cover for eligible land damage caused by floods, but flood damage to the house itself is generally covered by your private insurer, subject to your policy terms. Don't assume that the government-backed natural hazards cover will make up for a large private-policy flood excess. [About natural hazards cover :: Natural Hazards Commission Toka Tū Ake](https://www.naturalhazards.govt.nz/insurance-and-claims/about-nhcover/)[Cover for storm, flood, and landslide damage :: Natural Hazards Commission Toka Tū Ake](https://www.naturalhazards.govt.nz/insurance-and-claims/cover-for-storm-flood-and-landslide-damage/) Before switching, check: - Whether the excess applies to every flood event or is calculated differently in certain circumstances. - Whether flood damage to the building, contents and temporary accommodation are covered, and what excess applies to each. - Whether the cheaper policy has any flood exclusions, restrictions or special conditions. ## 4. Let's work out whether the saving is worth it for you If you share a few details, I can calculate the financial trade-off and help you assess the risk more meaningfully. You don't need to know everything to start. The premium saving, the two excess amounts and whether flooding has occurred at the property are the most useful first details. ## Gemini Answer ID: aafa2427-dec9-4ffd-8615-01604e124fcb Evaluating whether a cheaper house insurance policy with a much higher flood excess is "risky" depends primarily on your property's actual geographic exposure to flooding and your financial buffer. In New Zealand, private house insurance policies generally cover flood damage to the physical building and its contents (while the government's Natural Hazards Commission / NHC Toka Tū Ake primarily covers specific land categories, retaining walls, and clean-up like heavy silt). When insurers apply a steep flood excess—sometimes ranging into several thousand dollars or a specific percentage of the claim compared to a standard baseline excess—it changes the financial equation significantly. --- ### Key Factors to Determine Your Risk Level 1. **Your Property's True Geographic Risk** * **Low Risk:** If your home is elevated on a hill or well away from rivers, streams, and low-lying stormwater bottlenecks, a high flood excess is essentially a paper tiger. You are trading a low-probability event for a guaranteed annual saving on your premium. * **High Risk:** If your property is in a known flood zone, near a waterway, or has a history of surface flooding or poor local stormwater drainage, a high flood excess means you are taking on a massive out-of-pocket liability for a realistic hazard. 2. **The Math: Premium Savings vs. Potential Out-of-Pocket Cost** * Calculate the exact annual savings of the cheaper policy (e.g., saving \$400 a year). * Compare that to the difference between your standard excess and the new flood excess (e.g., an extra \$3,000 or \$5,000 out-of-pocket if a flood hits). * *Rule of thumb:* Divide the difference in excess by your annual savings. If it would take 5 to 10 years of saved premiums just to cover that single higher payout in a worst-case scenario, the risk may outweigh the discount. 3. **Your Liquid Emergency Buffer** * Can you comfortably absorb a sudden, unexpected cash outflow of several thousand dollars for clean-up and repairs without derailing your personal finances? If dipping into emergency savings for a high excess would cause financial distress, the cheaper policy carries high real-world risk. --- ### Recommended Next Steps * **1. Check Council Hazard Maps and LIM Reports:** Look up your local council's online natural hazard/flood mapping tools or your property's Land Information Memorandum (LIM) to see if your section is designated in a 50-year or 100-year flood plain. * **2. Review the Exact Wording:** Check whether the flood excess applies broadly to *any* water entering the home from surface runoff, heavy rain, or overflowing drains, as definitions can vary between insurers. * **3. Compare Total Cost of Ownership:** Weigh the annual premium difference against your capacity to self-insure that specific gap. How close is your home to a river, coast, or low-lying area prone to pooling water during heavy rainstorms? ## AI Overviews Answer ID: 7181fc49-f2db-4f22-9fd1-ad0b9dad5d81 Accepting a cheaper premium with a significantly higher flood excess is **inherently risky, because New Zealand insurers now use hyper-targeted, address-level risk mapping****.** If an insurer has carved out a large, separate flood excess (often ranging from $2,500 to $10,000+), it means their data shows your specific property faces an elevated risk of flooding. The shift away from standard, low-excess policies means you are effectively "self-insuring" the first major block of any climate-related structural damage. Evaluate Your Financial Exposure To determine if the premium savings are worth the gamble, weigh the mechanical structure of how flood risk and insurance claims work across New Zealand: +-----------------------------------+-----------------------------------+ | Standard Policy (Higher Premium) | Cheaper Policy (High Flood Excess)| +-----------------------------------+-----------------------------------+ | • Standard excess (e.g., $500) | • Standard excess for fire/theft | | • Predictable annual cost | • Massive out-of-pocket if flooded| | • Insurer holds the majority risk | • High risk of future non-renewal | +-----------------------------------+-----------------------------------+ 1\. Calculate the Break-Even Point Determine how many "flood-free" years you need to actually save money. * **Formula:** text{Excess Difference} div text{Annual Premium Savings} = text{Years to Break Even} * If you are saving $500 a year on premiums but your flood excess jumps by $5,000, you must go **10 consecutive years without a single flood event** just to break even on that choice. 2\. Know the NHC (EQC) Splitting Trap Many Kiwis mistakenly believe the government covers flood damage to homes. In New Zealand, the **[Natural Hazards Commission Toka Tū Ake](https://www.naturalhazards.govt.nz/insurance-and-claims/cover-for-storm-flood-and-landslide-damage/) (formerly EQC) only covers land damage** (within 8 meters of your home) from storms and floods. **The actual house structure is entirely covered by your private insurer.** If a flood ruins your carpets, gib boards, and kitchen, your private insurer's high flood excess applies entirely to those repairs. 3\. Anticipate the "Insurance Retreat" Blind Spot A high excess is frequently a stepping stone to **insurance retreat**. If local council models or international underwriters flag your property's zone as increasingly volatile, your insurer may raise the excess this year, dramatically spike the premium next year, and eventually **refuse to renew flood cover altogether**. This can severely compromise your ability to maintain a mortgage (as banks require active home insurance) and diminish your property's resale value. 3 Steps to Verify Your Real Risk Before signing the new policy, check the physical risk profile of your land: * **Audit Council Hazard Maps:** Do not rely on generic address search tools. Go directly to your regional council’s GIS flood viewer to overlay overland flow paths and 1-in-100-year flood plains onto your exact section. * **Look for "Bathtubs":** Check if your house sits in a designated pluvial "flood-prone" depression or ponding area, which traps water when local stormwater infrastructure reaches maximum capacity. * **Consult a Broker:** Contact an independent insurance broker to see if other major New Zealand underwriters view your property with the same severity, or if this specific insurer is simply aggressive with their risk-pricing model. To help narrow down whether this high excess is manageable for you, could you share roughly **how much higher the flood excess is** compared to your current policy, and whether you've noticed any **surface flooding or overland flow paths** on your property or street during past heavy rains? ## Google AI Mode Answer ID: e9d604a8-bb35-4c83-b327-67fe78dc5006 Switching to a policy with a higher flood excess can lower your regular premium, but it introduces a direct financial gamble. In _New Zealand_ , while the government's **Natural Hazards Commission (Toka Tū Ake NHC)** covers certain natural disasters like earthquakes or landslips, **storms and floods affecting the physical house structure** are handled entirely by your private house insurance policy. How risky that higher excess is depends on a few critical factors: * * **Location and Geography:** If your property is elevated, well away from major rivers, surface water pooling, or heavy storm run-off paths, the actual risk of making a flood claim is low. In that scenario, a higher excess is mostly a paper risk that saves you money year-on-year. * **Local Weather Patterns:** With increasingly severe weather events and atmospheric rivers hitting parts of New Zealand more frequently, localized flash flooding is becoming harder to predict. Even properties not traditionally considered "flood-prone" can suffer damage from blocked local drains or torrential downpours. * **Financial Buffer:** Ask yourself whether you could comfortably pay that high excess out-of-pocket on short notice if a severe weather event flooded your lower levels, ruined carpets, or damaged walls. If a sudden multi-thousand-dollar bill would stretch your finances, the short-term premium savings might not outweigh the sudden stress. * **The Math of Savings:** Compare the annual difference in your **premium** versus the jump in your **excess**. Calculate how many years of paying the lower premium it would take to equal the cost of that higher flood excess if you did have to claim once. * You can check guidance on property risk and natural disaster cover details via the [Natural Hazards Commission Toka Tū Ake](https://www.naturalhazards.govt.nz/) or review insurance comparison breakdowns on [MoneyHub](https://www.moneyhub.co.nz/). If you'd like to share: * **How much higher** the flood excess is compared to your current policy * Roughly **where your property sits** relative to rivers, streams, or low-lying areas I can help you **crunch the numbers** to see if the trade-off makes financial sense.