Investing with Kernel in Every Decade: From your 20s to your 60s

Each stage of your life calls for a different investment playbook. Early on it’s often all about stacking up the wins and taking risks, then priorities shift to balancing near term goals (like buying a house) with the longer-term. Eventually it’s all about protecting and preserving your wealth.

The tricky part is making the right moves at the right time. Here’s everything you need to know to maximise your investments for your age and stage.

If you’re in your teens or 20s you might not know it, but you’ve got an investing super power - time. Decades of compounding returns that will add up quickly, even if you’re only putting aside small amounts regularly. You might be surprised how much difference time can make. Read more about how you can get compounding to work in your favour here.

The trick to unlocking the power of compounding returns is setting up good investing habits sooner rather than later. That doesn’t mean putting away thousands every month - it’s more important to just stay consistent month in, month out, over a long period.

Just as investment returns can compound over decades, so can the interest you pay on credit cards, personal loans, store cards and car finance. It's easy to get swept up in wanting to start investing, but the maths only works in your favour once your most expensive debt is out of the way.

A credit card sitting at an average interest-bearing rate of around 19.9% (RBNZ as at July 2026) is quietly costing you more than than the average 7% return of the sharemarket when adjusted for inflation.

Put simply: paying down high-interest debt is often the better first move, because it's a guaranteed return in the form of interest you stop paying, versus market returns that go up and down and are never promised.

That doesn’t mean you need to have everything figured out straight away. But building good money habits in your 20s and spending within your means can help put compounding on your side.

As a 20-something, those long-term goals are likely still 20+ years away. With time on your side, you can afford to take a few more risks with longer-term investments. Sure markets may dip, but you have 10, 20, 30, or 40 years to wait while they recover and benefit from general upward market trends that we have seen in the past. Below are some investments that have high growth potential:

• Kernel High Growth Fund.
• S&P500 (NZD Hedged) Fund.
• Global 100 Fund.
• Kernel Shares and ETFs.

Your 30s is a tricky time for investing (take it from me). Building wealth may suddenly take a backseat to other big life goals, like having kids, buying a house, getting married, or - even better - going snowboarding in Japan.

Whatever you’re up to it’s important that you balance long-term goals with your short and mid-term ones - in other words, you need to multi-task. That means keeping one eye on your long-term goals (like retirement) by continuing to invest in high growth assets. But at the same time you might start contributing to a high interest savings account to save up for a house deposit within the next three years, or perhaps a balanced fund if it’s going to take 5+.

If you buy a house and have children you might suddenly find that your money keeps mysteriously vanishing, making investing a bit harder. That’s OK - this is a financial crunch point for many Kiwis. The main thing is that you keep contributing whatever you can consistently - even if it’s not much.

A common mistake we often hear about is leaving no room for the unexpected. A car repair, urgent trip to A&E or a broken appliance can quickly become expensive - and relying on a credit card or loan can add even more pressure when your budget might already be stretched.

That’s where emergency savings come in. Even a small amount set aside regularly can help build a foundation for financial stability for your family over time.

It’s also worth keeping an eye on your mortgage repayments. Small changes, such as increasing repayments when you can or reviewing your loan structure can make a meaningful difference to the total interest you pay and how long it takes to pay off your home.

You’re getting older (and you probably feel it in your knees) but you can likely still afford to take some risks depending on your circumstances. The majority of your investments could still be in high growth assets but you may need to start building up a high interest savings account as an emergency fund, or other conservative investments for other short or mid-term goals.

• High growth investments just like in your 20s, including funds, shares and ETFs (for long-term stuff - 7+ years away)
• Kernel Cash Plus Fund: a this fund can be an alternative to savings accounts, perfect for short-term goals (0-3 years away)
• Kernel Save: access to an on-call savings account with a selected NZ registered bank - and another great tool for short-term goals (0-3 years away).
• Kernel Balanced Fund: a fund holding 60% equities and 40% fixed interest assets, good growth potential with a little less volatility (3-7 year minimum timeframe for the medium-term stuff).

Most Kiwis hit peak earning potential in their late 40s and early 50s - many have also bought a house, had kids, and settled into a career.

This stage should be all about maximising your investments, and solidifying your retirement planning. This is a great time to switch to maximum KiwiSaver contributions if you can afford it, or increase your investments elsewhere, if that’s realistic for you - it may also be a good time to start thinking about downsizing if that’s an option.

Downsizing earlier can help free up cash to supercharge your retirement savings - the earlier you do it the more you can save.

After the financial crunch of your 30s, you may finally have some extra cash floating around. It’s easy to let this extra cash be vacuumed up by improving your lifestyle (bye Pak’n Save, hello New World). But one of the biggest mistakes to avoid in your 40s and 50s is not taking the time to look ahead.

It’s important not to get carried away and lose sight of your investment goals. Ask yourself; how much could you have saved by retirement, what might your regular spending look like, and how long will your savings need to last alongside NZ Super? The earlier you start thinking about these questions, the more options you have.

In your 40s your investment strategy may be largely the same as your 30s, except with fewer short and mid-term goals (you might already have the house and the kids after all). Then in your late 50s that will start to change as you approach retirement.

When you’re nearing retirement you might want to start shifting your investments into more defensive assets:

• Kernel Cash Plus Fund: this fund can be an alternative to traditional savings accounts, perfect for short-term goals (0-3 years away).
• Kernel Balanced Fund: a fund holding 60% equities and 40% fixed interest assets, good growth potential with a little less volatility (3-7 year minimum timeframe).

Read more about investing in your 50s

The retirement age in New Zealand is 65. At this stage you start receiving superannuation, and most people either stop work or shift towards part time or casual employment.

During this time the goal quietly shifts from accumulation to decumulation - from building wealth to living off it. That doesn't mean abandoning growth investments altogether, but it does mean rethinking how your money is structured.

The key here is to continue growing your wealth, while defending it against volatility. More on this below.

As you approach retirement, it’s easy to feel like the time for "investing" is over. However, there are two critical mistakes that can impact how comfortably you live through your later years: assuming it’s too late to make a change and pulling your money out of the market too early.

One common misstep is closing down your KiwiSaver entirely or shifting everything into cash as soon as you hit 65. With modern longevity stats, retirement can easily last 20 or 30 years. If your money isn't staying invested and continuing to grow during that time, you risk its purchasing power being eroded by inflation.

Another mistake is deciding that it’s too late to improve your financial position. Whether it’s fine-tuning your tax settings, adjusting your fund type, or simply running the numbers on your decumulation strategy, there are always opportunities to make a difference.

While everyone's situation is different, many retirees split their savings into buckets based on when they'll spend it:

• 0-3 years - stable, lower-risk options like term deposits or a high interest savings account, such as Kernel Save.
• 3-7 years - balanced investments with growth assets balanced by cash assets, like the Kernel Balanced Fund.
• 7+ years - space to move into higher risk, higher growth investments, like shares or ETFs.

This way, the money you need soon is unlikely to be impacted by a potential bad run in the market, while the money you won't touch for a few years is intended to continue to work hard.

Read more about the bucket strategy and investing for retirement

A few mistakes show up again and again, no matter your age. Here they are so you can avoid them:

• Waiting for the "right time" to start. There isn't one - time in the market matters more than timing the market, and every year you wait is a year of compounding you don't get back.
• Mismatching risk and timeframe. Putting short-term savings in high-growth investments (or long-term savings in cash) is one of the most common - and most avoidable - errors, whether you're 25 or 65.
• Not revisiting your portfolio as life changes. What made sense in your 20s won't necessarily make sense in your 40s. Set a reminder to check in on your investments at least once a year.
• Panic-selling in a downturn. Selling when markets drop locks in losses that a recovery might otherwise have erased. This gets harder to resist the closer you are to needing the money - which is exactly why bucketing your savings by timeframe helps.
• Ignoring fees. They look small on paper, but compound the same way returns do - just working against you instead of for you.

The way you invest will inevitably change as you age. From prioritising growth, to protecting what you’ve built and structuring it to last.

Hopefully this blog has shown you it’s not about being “perfect” - it’s about getting your foundations in place, adjusting as life changes and staying consistent over time. Whatever stage you're at, the best time to start (or course-correct!) is today.

Kernel Wealth Limited is the manager and issuer of the Kernel KiwiSaver Plan and Kernel Funds Scheme. Product Disclosure Statements for the Kernel KiwiSaver Plan and Kernel Funds Scheme are available at Kernel Wealth | Resources & Documents. Investing involves risk including the possible loss of principal and there is no assurance that the investment will provide positive performance over any period of time. The information provided should not be relied upon as investment advice or recommendations and should not be considered specific legal, investment or tax advice.