When it comes to KiwiSaver vs property, one of the biggest questions is whether to use your KiwiSaver for a first home or let it compound for retirement. In this discussion, we break down what actually builds more wealth in retirement and why the answer isn’t always as straightforward as it seems.
The First Home Dilemma
The starting point in the KiwiSaver vs property debate is simple: can you even buy a home without using your KiwiSaver?
Everyone’s situation is different. Some buyers rely heavily on KiwiSaver to form their deposit, while others may already have enough cash saved. If KiwiSaver makes up a substantial portion of your deposit, opting not to use it could mean you don’t get on the property ladder at all.
In New Zealand, a 20% deposit is typically preferred by banks. It reduces risk and unlocks better interest rates and incentives like cashback. Buyers with less than 20% often around 10% can still purchase, but they usually face higher interest rates.
That difference might seem small on paper (around 0.25%-0.5%), but on a $1 million loan, it can mean paying an extra $2,500 to $5,000 per year. Over several years, that adds up significantly.
Invest or Pay Down Debt?
Once you have enough deposit (for example, 20%), the KiwiSaver vs property conversation shifts to a more strategic question:
Should you invest or should you pay down debt?
On the surface, KiwiSaver can look appealing. A high-growth fund might return around 10% per year over the long term. But once you factor in fees (around 1%), tax (around 28%), and inflation (around 3%), the real return drops closer to 3-4%.
Compare that to a mortgage rate of roughly 5-5.5%, and the maths starts to favour reducing debt instead.
There’s also an important concept at play:
- KiwiSaver compounds positively over time
- Mortgage interest compounds negatively over time
In other words, the gains you make investing can be offset – or even outweighed – by the interest you’re paying on a larger mortgage.
The Hidden Advantage of a Smaller Mortgage
Reducing your mortgage doesn’t just save interest – it improves your long-term flexibility.
A smaller loan means:
- Faster equity growth
- Greater ability to upgrade your home
- More options to invest in property later
Less debt creates more opportunity. It can accelerate your path towards future goals, whether that’s upgrading your home or buying an investment property.
Why Some Still Choose KiwiSaver
Despite the numbers, some people are still drawn to keeping their KiwiSaver invested.
The reasoning often comes down to:
- The appeal of long-term compounding
- Retirement projections showing large balances
- A belief that investing will outperform mortgage costs
But as discussed, this approach can overlook the impact of interest, fees, tax, and inflation – all of which reduce real returns.
Key Takeaways
- A 20% deposit typically unlocks better interest rates and reduces long-term costs
- Real KiwiSaver returns (after fees, tax, and inflation) are often lower than expected
- Mortgage interest compounds against you, making larger loans more expensive over time
- Reducing debt can improve flexibility and accelerate future property opportunities
- For many people, a smaller mortgage may be more beneficial than a larger KiwiSaver balance in the short term
Next Steps
If you’re unsure whether to use your KiwiSaver or how to structure your first home purchase, the Lighthouse Financial KiwiSaver and Mortgage teams can help you build a plan tailored to your situation.
If you’d like to watch more, check out this other episode below.
For a no obligation discussion to see how we can help you on the path to wealth, please contact us.
Disclaimer:
The information in this article is general information only, is provided free of charge and does not constitute professional advice. We try to keep the information up to date. However, to the fullest extent permitted by law, we disclaim all warranties, express or implied, in relation to this article – including (without limitation) warranties as to accuracy, completeness and fitness for any particular purpose. Please seek independent advice before acting on any information in this article.
