How Much Key-Person Insurance Does a Business Need in NZ?

Sizing key-person cover is a method, not a guess. Here are the three ways to work out a sum insured — lost gross profit, replacement cost, and debt exposure — with an NZ worked example and the IRD tax rules that affect the number.

This article is general information only and is not personalised financial advice. It does not take into account your particular financial situation, goals or needs. Before acting, consider whether it's right for you and seek advice tailored to your circumstances.

"How much key-person cover do we need?" is the question that stalls most business owners, and it is usually answered with a guess — a round number that feels about right. There is a better way. The sum insured can be worked out from the business's own figures using one of three methods, depending on what you are actually protecting. This guide walks through each method, applies all three to the same sample New Zealand firm so you can see how they differ, and covers the IRD tax rules that change what the cover needs to be.

Why this matters more in a small firm: small businesses — those with fewer than 20 employees — make up around 97% of all New Zealand enterprises and contribute roughly 42% of the country's economic value.¹⁹ In a firm of that size, one person often drives a large share of the revenue, holds the key supplier or client relationships, or carries the technical knowledge that keeps the doors open. Lose them, and the impact is rarely proportional to their job title.

TL;DR: There is no single formula. Size key-person cover on what it is protecting — lost gross profit, the cost of replacing the person, or the business debt they support. For a sample $1.2m-revenue NZ firm, the three methods produce sums insured from roughly $250,000 to $700,000. Pick the method that matches the risk, and remember a revenue-purpose payout is taxable, so cover is sized on the after-tax need.

What is key-person insurance, and who counts as a key person?

Key-person insurance is cover the business owns on the life (and often the health) of a person whose loss would seriously damage the firm's finances. The business pays the premiums, the business is the beneficiary, and the payout goes to the business to absorb the financial blow — not to the person's family.

A key person is not just the founder. In practice they are someone whose death or serious illness would cause a measurable financial hit, such as:

• An owner-operator who personally generates a large share of sales or billable work.
• A person who holds the critical client, supplier or lender relationships.
• A specialist with technical knowledge or qualifications that are hard to replace.
• A person whose name or reputation the business trades on.

The concentration risk is real. At February 2025 New Zealand had 617,330 enterprises, and 74% of them had no paid employees at all.²³ Even among those that do, the vast majority are small: roughly 600,000 enterprises (about 97%) had fewer than 20 employees.⁴ By contrast, the 2,840 large enterprises (100 or more staff) held half of all employees in the country.⁵ In a small firm there is no deep bench to cover a gap, which is exactly why losing one person can be disproportionately damaging.

Key-person cover sits alongside the other pillars of business protection, but it answers a specific question: can the business survive the financial shock of losing this particular person?

How do you actually calculate how much key-person cover a business needs?

The honest starting point is that there is no universal formula. The right sum insured depends on what you are protecting against, and that splits into three jobs the cover might be doing:

1. Replacing lost profit while the business absorbs the disruption and recovers.

2. Paying the cost of replacing the person — recruitment, training, and the productivity dip while a replacement gets up to speed.

3. Clearing or supporting debt the person personally guaranteed or whose servicing depends on them.

Each job has its own sizing method. A business often needs cover for more than one job, in which case the amounts are added together rather than chosen between. The discipline is to start from the business's real numbers — the accounts, the loan balances, the revenue tied to the person — rather than a multiple plucked from the air.

It also helps to separate the type of event. Death is the obvious trigger, but a serious illness or injury that takes a key person out for months, or permanently, can be just as damaging. Most key-person programmes pair life cover with trauma and total and permanent disability (TPD) cover so the business is protected on more than just death. Whether any claim is paid depends on the policy terms, exclusions, stand-down periods and underwriting, so the cover type matters as much as the amount.

Should you size it on lost profit, replacement cost, or debt exposure?

These are the three core methods. They answer different questions, so the one you choose depends on what the key person actually does for the business.

A worked example makes the difference concrete. Take a New Zealand firm with $1.2m annual revenue, a 50% gross margin (so $600,000 gross profit), one owner-operator who drives most of the business, and a $400,000 business loan they have personally guaranteed.

The example shows why the same business can land anywhere from $250,000 to $700,000 depending on which risk you are sizing for. Most owners need a blend: enough to cover lost profit and clear the debt, because both consequences land at once. The job of the calculation is to make those assumptions explicit — how much of the profit really walks out the door with this person, how long recovery realistically takes — rather than hide them inside a round number.

How do multiples-of-salary and multiples-of-profit methods compare?

Insurers and brokers sometimes use rule-of-thumb multiples as a quick first cut. They are useful for a sanity check, but they are not a substitute for working from the actual numbers.

The trouble with a salary multiple is that an owner-operator's pay rarely reflects what they are worth to the business. They may draw a modest salary and take the rest as dividends, or reinvest profit rather than pay themselves. A multiple of that salary can badly understate the loss. A multiple of gross profit is usually closer to reality, but it still glosses over how long recovery takes and whether there is debt to clear.

The methods are best used together: run a multiple for a quick estimate, then test it against a detailed needs analysis built from lost profit, replacement cost and debt. Where the two diverge sharply, the detailed figure is the one to trust. Personalised advice works through which assumptions fit your business rather than applying a generic multiple.

How does key-person cover differ from shareholder buy-sell cover?

These two are constantly confused, and the distinction matters because it changes both the amount and the tax treatment.

Key-person cover keeps the business trading through the disruption. Buy-sell cover does something different: it provides the cash for the surviving owners to buy out a deceased or disabled co-owner's shares from their estate, so ownership transfers cleanly. A business with co-owners often needs both, sized separately — one against lost profit and debt, the other against the share value. We cover the share side in detail in shareholder protection and buy-sell agreement funding. Mixing the two into one vague "business cover" is how owners end up with the wrong amount and the wrong tax outcome.

Is the premium tax-deductible, and is a payout taxable in NZ?

This is where the sum insured has to be adjusted, because tax can take a slice of the payout. Inland Revenue's binding guidance is QB 17/06, and it turns on the purpose of the cover.

• Revenue-purpose cover (replacing lost business profits) — the premium is generally deductible under s DA 1, and any payout is taxable income because it replaces taxable profits.⁶
• Capital-purpose cover (for example, securing the ability to repay a loan) — the capital limitation applies, so the premium is generally not deductible, and a payout for the capital component is capital and not taxable revenue.⁷
• Dual-purpose cover — where a premium serves both purposes, an acceptable apportionment method must be used.⁷
• No FBT — for the qualifying key-person policies QB 17/06 covers (business-owned, business-beneficiary, employee with no enforceable right to the claim), there is no benefit to the employee, so fringe benefit tax does not apply.⁸

The practical consequence for sizing: if the cover is revenue-purpose, the payout is taxable, so the gross sum insured is not what the business keeps. If you have worked out the business needs, say, $480,000 of after-tax profit replacement, the sum insured has to be grossed up to allow for the tax on the payout. Capital-purpose cover (such as loan repayment) does not have that problem, because the payout is generally tax-free — but the premium is not deductible. We work through the full tax picture in key-person insurance tax: deductible premiums, taxable payouts. Smiths Financial does not provide tax or accounting advice — confirm the treatment with your accountant before relying on it.

How often should the sum insured be reviewed as the business grows?

Key-person cover is easy to set and forget, and that is where it quietly fails. The number that fit a $1.2m-revenue firm does not fit the same business at $2m. As revenue, margins, headcount and debt change, the gap the cover was meant to fill changes with them.

A cover amount set once can lag the business badly within a few years. If profit doubles and the cover stays put, a claim funds half the recovery it was meant to. The fix is a regular review — at minimum annually, and whenever the business takes on new debt, wins or loses a major client, or changes who the key people are. The review checks three things: is it still the right person (or people), is it still the right amount, and is it still the right purpose and tax treatment. The same annual meeting that updates the cover is a natural point to revisit how the owners' personal life cover is structured too — see how an adviser structures life cover.

How do you set up key-person cover so the business is the owner and beneficiary?

For the tax treatment in QB 17/06 to apply, the policy has to be structured correctly. In a qualifying key-person arrangement:

• The business owns the policy and pays the premiums.
• The business is the beneficiary and receives any payout.
• The insured employee has no enforceable right to the claim proceeds — the money belongs to the business, not the person or their family.⁸

That structure is what keeps it a business asset rather than a benefit to the employee (which is why no FBT applies). It also means the application, ownership and accounting all need to point the same way: the company on the policy, the purpose documented in a board minute or resolution, and the premiums treated in the accounts consistently with that purpose. Getting the ownership wrong can undo the intended tax position, so this is set up alongside your accountant rather than chosen by default at application. Whether a claim is ultimately paid still depends on the policy terms, exclusions, stand-down periods, underwriting and the disclosure made at application — always read the policy wording.

An independent adviser can place this cover across the major New Zealand insurers — Partners Life, AIA, Fidelity Life, Asteron Life and Chubb among them — and the right fit varies, because their trauma and TPD definitions, occupation classes and pricing differ. Not every provider in the market is shown, and each has its own product disclosure statement.

Frequently asked questions

How much key-person insurance does a business need in NZ?

There is no single figure. The sum insured is built from the business's own numbers using one or more of three methods: lost gross profit (the income lost while the business recovers), replacement cost (recruiting and bedding in a replacement), and debt exposure (borrowing the person guarantees or supports). For a sample $1.2m-revenue firm these methods can produce anywhere from roughly $250,000 to $700,000. A needs analysis against your real figures is the way to land on the right number.

Should I use a multiple of salary to size key-person cover?

A salary multiple (often 5-10×) is a quick sanity check, but it usually understates an owner's value, because owner-operators frequently draw a modest salary and take profit as dividends or reinvest it. A multiple of gross profit tends to be closer to the real economic loss. Either multiple is best tested against a detailed needs analysis built from lost profit, replacement cost and debt — where they diverge, trust the detailed figure.

Is the key-person insurance payout taxable in New Zealand?

It depends on the purpose of the cover. Under IRD's QB 17/06, a revenue-purpose payout (replacing lost business profits) is generally taxable income, and the premium is generally deductible. A capital-purpose payout (such as funding a loan repayment) is generally not taxable revenue, and the premium is generally not deductible.⁶⁷ Because a revenue-purpose payout is taxed, the sum insured is usually grossed up so the business keeps enough after tax. Confirm the treatment with your accountant.

Does key-person cover need to include illness, not just death?

In most cases it makes sense to cover more than death. A serious illness or injury that takes a key person out for months, or permanently, can hit the business as hard as a death. Many key-person programmes pair life cover with trauma and TPD cover so the business is protected across the events most likely to remove someone from the firm. Whether any claim pays depends on the policy terms, definitions, stand-downs and underwriting.

How often should we review the sum insured?

At least annually, and whenever the business changes materially — new debt, a major client won or lost, a change in who the key people are, or significant profit growth. Cover set once and left can fund only a fraction of the loss a few years later, because the business has grown past the original number. A regular review keeps the amount, the person and the tax purpose current.

This article is general information only and is not personalised financial advice. It does not take into account your particular financial situation, goals or needs. Before acting, consider whether it's right for you and seek advice tailored to your circumstances. Smiths Financial is a trading name of Craig Smith Business Services Ltd (FSP712931), which holds a Class 2 financial advice provider licence issued by the Financial Markets Authority. Smiths Financial provides advice about personal risk insurance, health insurance, general insurance, KiwiSaver and managed funds, and is a member of the Financial Dispute Resolution Service (FDRS), a free and independent dispute resolution scheme. Whether a claim is paid depends on the terms, conditions, exclusions, stand-down periods and underwriting of the specific policy, and on your disclosure — this is a summary only, always read the policy wording. We work with a panel of selected insurers, listed in our disclosure. We're generally paid by commission from the insurer when you take out a policy through us; this doesn't change the premium you pay, and we manage any conflicts in line with our duty to prioritise your interests. Smiths Financial does not provide tax, accounting or legal advice — this is general information only, please consult an appropriately authorised professional. Written by Henry Smith, Financial Adviser; reviewed by Craig Smith, Principal Adviser. Figures are correct as at 28 May 2026; check current guidance at ird.govt.nz. Last reviewed 28 May 2026.