How Much Life Insurance Do You Need NZ?

"How much life insurance do I need?" is the question every household has to answer. Generic multipliers (10x salary, 12x salary) are starting points but rarely line up with the real numbers in any specific household — a 35-year-old with three children and a $700,000 mortgage has different exposure to a 55-year-old with a paid-off house and grown children. This guide walks through a bottom-up framework that produces a concrete sum specific to your situation.

The framework is simple addition followed by subtraction: add up what your death would cost your dependants, subtract the assets they would already have, and the difference is the sum to insure. The detail is in how you size each component.

4 million

active life insurance covers across NZ

There are about 4 million active life-insurance covers in NZ

The Financial Services Council of NZ tracks the total. Industry research consistently shows many NZ households carry less cover than would clear a mortgage plus support dependants — the gap is largest among working adults aged 30-50 with young families.

Source: Financial Services Council NZ (FSC NZ) · Life Insurance Spotlight (May 2026 — FSC NZ insights homepage) · verified 2026-06-09

The framework — add, then subtract

Three numbers added together give the gross need:

Outstanding debts that would need to be cleared or refinanced — mortgage, personal loans, car loans, family loans.
Income replacement for the years your dependants would otherwise lose your earnings.
Funeral and immediate-after-death costs — a buffer for the weeks before the main policy pays out.

From that gross number, subtract:

Existing assets the surviving family already has — KiwiSaver, savings, investments, other property equity.
Existing cover — employer death-in-service cover, existing life policies, group cover through professional bodies.

The difference is the sum you need to insure. Round up rather than down — overinsurance is mildly wasteful; underinsurance is the disaster scenario.

Step 1 — Outstanding debts

The mortgage is usually the largest single item. The most common purpose of NZ term-life cover is to clear the mortgage so the surviving partner does not face a forced sale.

Take the current mortgage balance (not the original amount — pay-downs reduce the requirement). Add personal loans, car loans, family loans that would crystallise on your death. Credit-card balances at the date of death too.

What about your business? If you carry personal guarantees on business debt — common for owner-operators — that exposure should also be in the sum-insured calculation, often via a separate "business life cover" policy.

Step 2 — Income replacement

The trickier number. The question: for how many years, and at what level, would your dependants need to replace your earnings?

Two common framings:

(a) Income multiplier. Pick a number of years — usually 5 to 10 — and multiply your after-tax income by it. This funds the household budget for the chosen period and assumes the surviving partner returns to (or increases) their own earnings within that window.

(b) Years-to-independence. Calculate the years until your youngest child becomes financially independent (often used as age 18, 21, or 25 depending on tertiary study assumptions). Multiply that by your after-tax income net of what the surviving partner could earn alone. This is more accurate for households with very young children where the income shortfall lasts longer.

Both methods are approximations. The point is to choose a horizon and apply it deliberately rather than rely on a generic multiplier that may not fit.

Step 3 — Funeral and immediate-after-death buffer

Funeral costs in NZ commonly run into the low five figures. Beyond the funeral, the surviving family often faces immediate expenses: travel for relatives, debts that need to be settled quickly, time off work for the surviving partner.

The main life policy can take weeks to settle (probate, claim review). A buffer of low five figures bridges the gap. You can build this into the main sum insured, or hold it separately as a small funeral-cover policy (which usually pays within days).

Step 4 — Existing assets (subtract)

The gross sum from steps 1-3 is offset by assets the surviving family already has access to:

KiwiSaver balance. Becomes available to the estate or surviving partner subject to scheme rules. For a 50-year-old with 20+ years of contributions, this can be a substantial amount.
Savings and investments. Cash buffer, term deposits, share or fund portfolios outside KiwiSaver.
Equity in other property. An investment property could be sold to release capital; weigh whether this is a path the surviving partner would actually want.
Inheritance or trust assets. If known and reasonably reliable.

Be honest about liquidity. An illiquid asset (a business interest, a property in a sole name) is not the same as cash — a forced sale during grief is not a good outcome. Discount illiquid assets when sizing the gap.

Step 5 — Existing cover (subtract)

Group cover often gets forgotten:

Employer death-in-service. Many NZ employers provide a multiple of salary as group life cover. Check your employment agreement or HR portal.
Existing personal life policies. Both partners often have old policies they took out years ago. List them all by sum insured and term-to-expiry.
Professional body cover. Some industry bodies and unions provide small group life cover.
Mortgage protection insurance. If the lender required it — though it usually only clears the mortgage and may be more expensive per dollar than standalone term cover.

Sum the existing cover and subtract from the gross need to find the gap.

A worked example (qualitative)

A late-30s couple, two young children, partnered with one main earner. Mortgage in the mid-six-figure range, KiwiSaver in the mid-five figures, employer group life cover of two times annual salary, no other personal life cover:

Mortgage to clear — mid six figures.
Income replacement — about 10 years of the shortfall between the main earner's net income and what the surviving partner could earn alone. Lands in the low to mid six figures depending on the wage assumption.
Funeral + buffer — low five figures.
Gross need — low to mid seven figures (sum of the three).
Less KiwiSaver balance — subtracts mid five figures.
Less employer group cover — subtracts roughly two times salary (low six figures for many NZ households).
Net sum insured — typically high six figures to low seven figures.

Round up rather than down. The premium difference between a slightly-too-low and a slightly-rounded-up sum is small relative to the certainty it provides.

The same framework applied to a different household will give a very different number. A late-50s couple with a paid-off house and grown children might land at low six figures or less. A young family with three children, a large mortgage and a non-working partner might land well into seven figures. The framework adapts; the multiplier rule does not.

Both partners need cover

Even when one partner does not earn an income, their death has financial cost — childcare, housekeeping, school-related coordination, all the household work that would otherwise be paid for. A reasonable sum for a non-earning partner is the cost of replacing that work for the years the children need it.

As a starting point: $40,000-$60,000 per year of full-time childcare and household work × the years until children are independent. A reduced sum (proportional to the duration) is appropriate; full income-replacement is usually not.

When to review the sum insured

Major life events change the gap:

New mortgage or significant mortgage top-up
Birth or adoption of a child
Significant pay rise or career change
Paying off the mortgage
Children becoming financially independent
Significant change in KiwiSaver balance (e.g. after first-home withdrawal)

Future-insurability features in the policy let you increase the sum on these events without fresh medical underwriting — a cheap-to-include feature that often turns out to be the most valuable one in the policy. Without it, a later health change can lock you out of increasing cover at all.

Next steps

For an overview of the NZ life-insurance market and how insurers compare, visit our life insurance hub. For wording-level depth use LifeInsurer. To talk through your specific household calculation with a licensed adviser, request a life-insurance consultation — your enquiry is referred to Evolve Group Limited (FSP711891), a Financial Advice Provider.

Frequently asked questions

How much life insurance do I actually need?

The starting point is the sum of three things: outstanding debts (mortgage, personal loans), the future cost of supporting your dependants, and a buffer for funeral and immediate-after-death costs. From that total, subtract assets that would be available — savings, KiwiSaver, employer death-in-service cover. The gap is the sum you need to insure.

Is "10x annual income" a good rule of thumb?

It is a starting point but often misses the household specifics. A 35-year-old with young children, a large mortgage and a non-working spouse usually needs more than 10x; a 55-year-old with a paid-off house, grown children and substantial KiwiSaver may need less. Build the sum bottom-up from your actual debts and dependants rather than applying a generic multiplier.

Should I include the mortgage in my life insurance calculation?

Yes — the most common purpose of NZ life cover is to clear the mortgage so the surviving partner does not face a forced sale. Take the current mortgage balance and add it to your sum-insured calculation. Some lenders offer separate "mortgage protection" insurance, which is often more expensive per dollar of cover than a standalone term-life policy that covers the same amount.

How long should the cover last?

Long enough to cover the years your dependants need your income. A common framing: cover to the date your youngest child becomes financially independent (early 20s), or to the date your mortgage is paid off, whichever is later. Most NZ term-life policies are written as "cover until age 65 or 70" rather than a fixed number of years.

What about funeral and immediate-after-death costs?

Funeral costs in NZ commonly run into the low five figures. Add a buffer in the low five-figure range (or use a separate small funeral-cover policy) for the immediate week after death — funeral arrangements, travel for family, debts due immediately. The main life-cover sum insured can take weeks to pay out; the small buffer covers the gap.

How do I factor in KiwiSaver and other savings?

KiwiSaver becomes available to the surviving partner on your death (subject to scheme rules) and reduces the life-cover gap dollar for dollar. Other savings, investment property equity, employer death-in-service cover and existing life policies also reduce the gap. Subtract them all from the gross sum needed before deciding the policy size.

What is the difference between sum insured and benefit?

Sum insured is the lump sum the policy will pay on death. Benefit is the same thing in some insurers' language. Watch for whether the sum is indexed (rises with CPI) or static — an unindexed policy taken out in your 30s loses purchasing power over the next 30 years; an indexed policy keeps pace with inflation, but premiums rise correspondingly.

Should both partners have life insurance?

Usually yes, even if one partner does not earn an income. A non-earning partner often provides childcare and household work that would otherwise be paid for if they died — the cost of replacing that work over the years the children need it is substantial. A reduced sum (proportional to the value of the unpaid work being protected) is common.

How often should I review the sum insured?

After every major life event — taking on a new mortgage, having a child, salary increase beyond a threshold, paying off significant debt. Otherwise every 3-5 years. Future-insurability features (see below) make these reviews easier by allowing increases without re-underwriting medical history.

Why is "future insurability" important?

A future-insurability benefit lets you increase your cover after a defined life event without re-underwriting your health. Without it, every increase requires fresh medical questions — and if your health has changed in the meantime (a new diagnosis, weight gain, mental-health treatment), you may not be able to increase the cover at all. Cheap to include at policy start; expensive to do without later.

This article is a general framework for sizing life insurance, not regulated personal financial advice. Your specific sum insured depends on detailed personal circumstances — confirm with a licensed adviser before relying on a particular figure. Read our methodology and sources.