Making Retirement Drawdown Work for You

A practical guide to turning your life savings into reliable retirement income

In New Zealand, retirement drawdown typically means combining NZ Super (a universal, non-means-tested pension from age 65) with regular withdrawals from a KiwiSaver Scheme and other investments, topped up by any part-time work or other income, to fund spending across 20 to 30 years of retirement. The technical term is decumulation. The practical challenge is making it all last.

You spent decades filling the bucket. Now the game changes: you need to empty it at the right pace, for the rest of your life, without knowing exactly how long the rest of your life will be.

The good news?

A well-constructed drawdown approach is neither mysterious nor impossibly complex. It does, however, require more thought than picking a single percentage and hoping for the best. Unlike many countries, most investment income in New Zealand is taxed within the fund itself, which means withdrawals often arrive in your bank account without further tax deductions. This structural advantage changes how much gross income you actually need, and it is one of several reasons NZ-specific advice matters here.

This guide, informed by how licensed New Zealand advisers such as ourselves typically structure drawdown for clients approaching or in retirement, walks through the practical mechanics of converting your savings into income you can rely on.

What Is a Retirement Drawdown Plan?

A retirement drawdown plan maps out four things. First, what your spending needs are, including major goals such as overseas travel, gifting, and perhaps helping adult children financially. Second, where the cash flow will come from to support the lifestyle you want. Third, when you should spend your money (for instance, would an early gift to your children as a partial first-home deposit be more useful than a larger inheritance decades later?). Fourth, how you will invest and organise your assets so your portfolio keeps working while you draw from it.

Most New Zealanders expect they will figure out retirement planning once they actually retire. In practice, the earlier you sketch a drawdown plan, the more options you retain. The stakes are high: you will not get a do-over if things go wrong. How much you withdraw this year affects how long the rest lasts, which affects how boldly you can invest the remainder, which affects how much is available next year.

How Useful Are Retirement Drawdown Rules of Thumb?

Nearly every personal finance article arrives with a rule of thumb attached. The New Zealand Society of Actuaries (NZSA), through its Retirement Income Interest Group (RIIG), has published four rules of thumb tailored to local conditions. They are worth knowing, even if none should be followed rigidly.

The 6% Rule. Each year you withdraw six percent of the portfolio value at the date you retired. Income is higher in the early years when most people are most active. It is not adjusted for inflation, which means purchasing power erodes over time. There is a greater chance of exhausting the fund.

The Inflated 4% Rule. You take four percent of the portfolio in year one and increase withdrawals each year in line with inflation. This is the approach Bill Bengen developed in the US in 1994. It provides a more stable real income but starts conservatively and was designed for a different tax and pension system.

The Fixed Date Rule. Each year, you divide your current portfolio balance by the number of years remaining until a chosen end date. Income is predictable in timing, but the annual amount fluctuates with market performance. Once the end date arrives, you rely on NZ Super alone.

The Life Expectancy Rule. Similar to the fixed date approach, but the divisor adjusts for your remaining statistical life expectancy rather than a fixed end date. More complex to manage, but it carries a higher certainty of lasting as long as you do.

RIIG's 2023 modelling found retirees could be "almost certain" of maintaining target income until about age 82 under the 6% rule, and well past 100 under the life expectancy approach. The trade-off is between early generosity and late-life security.

Why No Single Rule Fits Everyone

Rules of thumb are a logical starting point. But if you follow one rigidly without reference to your own circumstances, you risk either under-spending or outliving your savings.

1. Retirement ages differ. Someone leaving the workforce at 55 faces a fundamentally different drawdown horizon from someone retiring at 68.
2. Longevity varies enormously. Family history, occupation, lifestyle, gender, and ethnicity all influence how long you might live. Test ny retirement plan for living to between ages 90 and 95. Over half of today's 65-year-olds can expect at least another 20 years; one in five may reach 95.
3. Age gaps between spouses complicate the maths. Different life expectancies between partners, amplified by any age gap, mean one partner's plan may need to fund a much longer solo period.
4. Your lifestyle should drive the plan. Some people prefer to let spending needs dictate the drawdown rate rather than starting with an abstract percentage. This goals-based approach reverses the equation: you tell your money what you want, not the other way around.
5. Retirement is not a straight line. It might last three decades. Markets shift, health changes, governments adjust policy. NZ Super is among the most politically stable pensions in the developed world, but no plan should assume every setting remains frozen for 30 years. A plan set once and never revisited is a plan waiting to fail.
6. Other income changes the equation. NZ Super provides a universal base. Some retirees have overseas pensions, rental property income, dividends, or part-time work. These sources materially reduce what your portfolio needs to generate.
7. Spending changes with age. This is the single most overlooked factor. The next section explains why.

Repeated studies in comparable countries have shown many retirees spend less than they safely could in their early retirement years, paralysed by the fear of running out. One Australian study found four in five working-age Australians believed they had a 40% or greater likelihood of outliving their savings. The irony is thick: decades of responsible saving can create a mindset so conservative it defeats the purpose of having saved at all. Learning to spend in retirement is a genuine challenge for disciplined savers.

Phase Your Retirement: Spend More When You Can

Retirement spending is not a flat line, and treating it as one leads to poor decisions. RIIG's December 2024 research on spending patterns through retirement confirms what advisers have long observed: real spending (adjusted for inflation) tends to decline by roughly 2% per year after age 65. Early retirement is expensive. Late retirement, generally, is not.

Go-Go Phase (Roughly Ages 65 to 74)

Travel, hobbies, and home upgrades dominate spending. This is the most active, most expensive, and most rewarding decade. Bucket-list items, new skills, and possibly some part-time work or consulting. Some retirees are busier during this phase than they were in full-time employment. This is the period to spend purposefully. Careful financial planning ensures you enjoy it without compromising the decades to come.

Go-Slow Phase (Roughly Ages 75 to 84)

Day-to-day costs ease, but healthcare rises. Travel becomes less appealing or more tiring. The family visiting you starts to feel preferable to visiting them. Downsizing to a smaller, lower-maintenance home appeals to many. The goal here is steady, comfortable living without financial stress.

No-Go Phase (Age 85 Onward)

Healthcare and care costs are the dominant variable. Day-to-day spending is modest, but medical expenses and potential residential care can spike. Cognitive decline may require professional support. Holding some reserves back for this phase is prudent, though not so much as to deny yourself the earlier years.

Modelling your drawdown to this phased pattern, rather than assuming a flat withdrawal rate across 30 years, can unlock significantly more spending in your healthiest years without endangering your later ones. To understand the numbers behind each phase, our guide to how much it costs to retire in New Zealand breaks down the Massey University benchmarks in detail.

Retirement Drawdown Methods in NZ

Beyond the fixed-percentage rules of thumb, several flexible withdrawal approaches can better align spending with market conditions and personal needs.

1. The Guardrail Method

You set upper and lower limits on your annual withdrawal rate. Establish a baseline (say, 4% of the portfolio). In good market years, increase spending to perhaps 5%. In poor years, cut back to 3%. The benefit is responsiveness: it protects your portfolio from sequence-of-returns risk by automatically reducing withdrawals during downturns. The drawback is behavioural. Cutting spending when markets fall requires discipline most people find uncomfortable.

2. Regular Withdrawal of Living Expenses

Withdraw only what you need for short-term living expenses on a set schedule, say annually or quarterly. On 1 January, cash out one year's worth of expenses to your everyday account and leave the rest invested. The more capital you keep invested, the longer it works for you. The risk: if markets drop sharply just before your scheduled withdrawal, you are selling at a low point.

3. The Buckets Method

The portfolio is divided into "buckets" matched to different time horizons. Bucket 1 (short-term, one to three years) holds cash and term deposits for immediate needs. Bucket 2 (medium-term, three to ten years) holds bonds and conservative investments. Bucket 3 (long-term, ten-plus years) holds growth assets to combat inflation.

You refill the short-term bucket from the others in good markets and pause refills during downturns. The psychological benefit is significant: knowing your next few years of expenses are safe from market volatility helps many retirees sleep at night. The trade-off is efficiency; keeping several years of expenses in low-growth assets sacrifices some long-term return.

4. Goals-Based Drawdown

Rather than starting with a percentage, start with your life. Map essential spending (housing, food, transport, insurance, healthcare) against reliable income such as NZ Super. Then map discretionary spending (travel, hobbies, dining, family experiences) against your investment portfolio. The drawdown rate becomes an output of the plan, not an input. This approach works well for couples with different risk tolerances, or anyone who finds abstract percentages unhelpful compared to concrete lifestyle goals.

Related reading:

• Early retirement pitfalls, and how to avoid them
• What to do with investment property when you retire

How Drawdown Works in Practice

The mechanics of drawing down investments in New Zealand are simpler than many retirees expect. After appropriate planning, you can establish an income arrangement which sells a small fraction of your investments at regular intervals. The proceeds are paid to your bank account, perhaps weekly or monthly. Most managed funds allow free regular withdrawals with no exit fees, so the experience feels much like receiving a salary.

Many managed funds are taxed at your Prescribed Investor Rate (PIR, capped at 28%), which means withdrawals arrive without further tax deductions. For retirees who would otherwise sit in a higher personal tax bracket, this can be a meaningful advantage worth understanding before choosing where to hold your investments.

For a KiwiSaver Scheme, once you reach 65 and have been a member for at least five years, you can withdraw some or all of your balance at any time. Some providers allow regular scheduled withdrawals similar to non-KiwiSaver funds; others require lump-sum withdrawals. It is worth confirming your provider's options well before you reach 65, so you can switch if the withdrawal mechanics do not suit your drawdown plan.

Your Nest Egg May Last Longer Than You Think

This is the point most commentary gets wrong. Your retirement savings are not a jar being emptied spoonful by spoonful. They are a portfolio generating returns on the balance you have not yet spent.

Scenario 1: A $1,000,000 portfolio. You withdraw $40,000 per year (roughly $770 per week). After the withdrawal, $960,000 remains invested. If the portfolio earns a conservative 3% per year after fees and tax, the return on the remaining balance is about $28,800. End-of-year balance: approximately $988,800. Although you withdrew $40,000, your total balance dropped by only $11,200. Many people instinctively calculate $1,000,000 divided by $40,000 and conclude the money lasts 25 years. At a consistent net 3%, it could last around 44 years.

Scenario 2: A $550,000 portfolio. A more typical NZ couple. Combined with roughly $44,400 per year from NZ Super, they need their portfolio to generate an additional $22,600 per year to reach about $67,000 in total income, comfortably between the Massey University "No Frills" benchmark ($49,000) and the "Choices" benchmark ($93,000) for a metro couple. At a net 3% return, a $550,000 portfolio sustaining $22,600 in annual withdrawals could last over 40 years. The guardrail and risk settings look very different from a million-dollar portfolio, but the principle is the same: the money keeps working while you spend from it.

In reality, investment returns do not arrive in a smooth 3% every year. Some years will be higher, some lower, and some negative. But the principle holds: a well-managed portfolio continues to generate returns while you draw from it, extending the life of your savings considerably.

The Role of NZ Super

New Zealand Superannuation is a universal pension paid to eligible residents from age 65. It is not means-tested: your savings, investments, and employment income do not reduce the amount you receive. At 2026/27 rates (adjusted each April), a single person living alone receives approximately $555 per week after tax. A couple where both partners qualify receives approximately $854 per week, or roughly $44,400 per year combined.

For a drawdown plan, NZ Super is your floor, and arguably your most valuable retirement asset, because it functions as longevity insurance: it pays for as long as you live, regardless of what markets do. According to Massey University's 2025 Retirement Expenditure Guidelines, the gap between NZ Super and what retirement actually costs ranges from roughly $4,600 per year (no-frills metro couple) to $48,600 per year (comfortable metro couple). Your portfolio's job is to fill this gap.

One point worth making, because most commentary misses it: retirees no longer pay ACC levies, no longer contribute to a KiwiSaver Scheme, and no longer need to save for retirement, because they are in it. The gross income required to support a given lifestyle is meaningfully lower in retirement than during your working years.

The Risk Nobody Talks About: Sequencing

Most people understand market risk. Fewer understand sequence-of-returns risk, which is arguably more dangerous in retirement.

The idea is simple: the order of investment returns matters as much as the average. Say you retire with $800,000 and withdraw $40,000 per year. If markets drop 15% in your first year, your portfolio falls to $640,000 after the withdrawal. You now need the remaining balance to recover from a much lower base, all while you continue drawing from it. The same 15% drop occurring ten years into retirement, when the portfolio is smaller anyway and you have already enjoyed a decade of returns, does far less damage.

Two retirees can experience identical average returns over 20 years and end up with vastly different outcomes depending on whether the bad years landed early or late.

This is why the guardrail method and the buckets method exist. They are, at their core, defences against sequencing risk. Reducing withdrawals in down markets, or drawing from a cash reserve instead of selling growth assets at depressed prices, can make the difference between a portfolio lasting 25 years and one lasting 40. It is also often the point where people seek a second opinion, particularly when one partner is likely to outlive the other by a significant margin. If you are navigating this, a conversation with our team can help you stress-test what you have against what you need.

Diversify Your Retirement Toolkit

Diversification in retirement extends beyond the portfolio. A blend of NZ Super, investment portfolio drawdown, rental property income, and part-time work (if you wish) provides more resilience than any single income source.

As you shift from saving to living off savings, you face new risks, and possibly missed opportunities, in areas such as sequencing risk, tax efficiency, and estate considerations. Based on our experience as licensed advisers managing over $1 billion in funds under advice for New Zealand families, these risks and opportunities are often best identified by an external pair of eyes. Nobody wants a well-earned retirement derailed by over-concentration in one area taking an untimely plunge in value just as it is time to start drawing down.

NZ Super Is Your Safety Net. Your Plan Is Your Freedom.

Here is what makes retirement in New Zealand different from most countries: NZ Super acts as longevity insurance. It is universal, inflation-adjusted, and paid for life. You cannot outlive it. No market crash can take it away. In a world where retirees in other jurisdictions agonise over annuities and pension drawdown limits, this is a structural advantage worth appreciating.

Your investment portfolio, then, is not your lifeline. It is your lifestyle. It funds the gap between a basic existence and the retirement you actually want to live. A good drawdown plan respects this distinction: it protects essentials with reliable income, deploys savings for the years when health and energy allow you to enjoy them most, and holds enough back for the years when spending shifts from travel to care.

Spend purposefully in the early years. Set guardrails so the later years are secure. Review annually. Adjust as life changes.

If you would like to speak with someone from our team about your retirement or drawdown plans, get in touch for a no-obligation initial discussion.