Could $31 a Week Add $265,000 to Your KiwiSaver?

What could an extra $31 a week mean for your retirement? In one illustrative KiwiSaver scenario, it could mean finishing with approximately $265,000 more by age 65. 

It may not feel like a significant amount from one payday to the next. But when you give your contributions decades to grow, a small increase today could lead to a very different retirement outcome. 

To see how it could work, imagine you are 25, earning $65,000 and starting with no existing KiwiSaver balance. What happens if you increase your contribution rate from 3.5% to 6%? 

From $31 a Week to $265,000 

If you earn $65,000, contributing 3.5% means putting approximately $43.75 into KiwiSaver each week. Increasing your contribution rate to 6% lifts your contribution to $75 a week. That is an initial difference of just $31.25. 

Now give that change time to work. If your salary grows by an average of 2.5% each year and you remain invested in a growth fund until age 65, contributing at the current default rate of 3.5%, rising to 4% in 2028, could leave you with around $896,000. 

At a 6% contribution rate, your projected balance could reach approximately $1.16 million. The difference is around $264,000, rounded to approximately $265,000 for the headline. 

The 2.5 percentage-point difference applies initially. When the default rate rises to 4% in 2028, the ongoing gap between the default rate and 6% becomes two percentage points. 

This illustration also includes minimum employer contributions and the annual government contribution where eligible. Employer contributions are subject to employer's superannuation contribution tax, and eligibility rules can change over time. 

Why the Difference Grows 

The difference does not come from one dramatic leap. It builds as you make slightly larger contributions over many years and potentially earn returns on both the money you contributed and the growth it has already achieved. That is compounding quietly doing the heavy lifting in the background. 

If your salary increases, the dollar value of your percentage-based contribution can rise with it. More may go into your account over time, while the contributions you make earlier have longer to remain invested. 

This is why starting sooner can matter. Even if $31 a week does not look life-changing today, giving it decades to work could make the long-term difference much more significant. 

Choosing a Rate That Works for You 

From 1 April 2026, the default employee contribution rate and matching minimum employer rate increased from 3% to 3.5%. They are scheduled to rise again to 4% from 1 April 2028. You can also select another available rate, including 6%, if it suits your goals and budget. 

However, 6% is not automatically the right answer for you. A higher rate could strengthen your long-term savings, but it will also reduce your take-home pay today. The best rate is one you understand, can afford and can review as your circumstances change. 

Your contribution rate is only one part of the KiwiSaver picture. Your fund type, fees, tax rate, time horizon and comfort with market ups and downs can all affect your results. 

A growth fund may suit you if you have decades before retirement and can tolerate periods when your balance falls. It will not suit every person or timeframe, so your fund should be a deliberate choice rather than an option you selected years ago and never revisited. 

For you, an extra $31.25 a week may feel manageable, or it may place too much pressure on your current budget. The more useful question is: what could your contribution rate, fund and timeframe mean for your retirement, and is there a realistic change you can make now? 

Run Your Own Numbers 

Your outcome will not be exactly the same as this example. Retirement projections are estimates, not promises, and your final balance will depend on your income, investment returns, fees, tax, contribution history, withdrawals, eligibility and future KiwiSaver settings. 

Still, seeing your own projection can turn a vague retirement goal into something you can do. A small adjustment you make early may have more time to grow than a much larger adjustment made later. 

Watch this video with Mils Muliaina to see what an extra $31 a week could mean for your KiwiSaver by age 65. 

Want to know what your contribution rate and fund could mean for your retirement? Send The Mortgage Hub a message and we’ll run the numbers with you. Our advice is free.