Should You Consider Stopping Your KiwiSaver to Pay Off Your Mortgage?
Disclaimer: The below guide is general in nature and do seek individual financial advice to see how this applies to your situation. Our experienced advisers are on hand to help at no cost to you (T’s and C’s apply).
Right now, interest rates are biting. With household budgets stretched tighter than they have been in years, it is completely natural to look at your payslip and wonder where you can free up some extra cash.
For many homeowners, the obvious target is that 3.5% going into KiwiSaver every payday.
The logic makes sense on the surface: "Why should I have my money locked away in a fund when I have a massive mortgage charging me 7% right now?"
Applying for a Savings Suspension (formerly known as a contribution holiday) to redirect that money into your home loan can feel like a smart financial move. But once we look under the hood, the math often tells a very different story.
Let’s go through what generally happens when you pause your KiwiSaver, and why it could potentially cost you tens of thousands of dollars over the long term.
What happens when you pause your KiwiSaver?
When you stop your 3% contribution, two other very important things typically stop at exactly the same time:
Your Employer Match: Your employer is generally required to match your 3% contribution. If you stop putting your money in, they stop putting theirs in.
The Government Contribution: For every $1 you put into KiwiSaver, the government gives you 25 cents, up to a maximum of $260.72 a year. If you aren't contributing, you miss out on this annual contribution.
How does the maths work?
This bit gets a bit technical, so if you’re not interested in that side of things that’s ok. In short: For many people, pausing KiwiSaver can result in a lower net wealth position over the long term because your money earns far less sitting on a mortgage than it does inside your fund.
To see exactly why, let's look at the actual returns generated under both paths on a common scenario.
Let’s assume a borrower earns $85,000 a year before tax, has a mortgage at 7%, and is looking at the standard 3.5% minimum contribution rate. Their 3.5% contribution comes to $2,975 a year.
Since that $2,975 is their money either way (it either sits in their bank account or in their KiwiSaver), it's completely net-neutral. Let’s look purely at what that money earns them:
Path A: Pausing KiwiSaver to pay the mortgage (The Return) They stop their 3.5% contribution, freeing up $2,975 in cold, hard cash. They throw that entire sum straight onto their 7% mortgage.
Actual Annual Return (Interest Saved): $208 per year.
Path B: Keeping KiwiSaver going (The Return) They leave their 3.5% contribution alone. Because they did, their money actively triggers a completely separate pool of wealth generation:
Employer Match: Their employer adds a 3.5% match, which comes to roughly $2,083 after ESCT tax.
Government Contribution: The government adds their maximum matching contribution of $260.
Est. Fund Growth (5%): Assuming a conservative 5% annual return on this year's new combined pool of funds adds another $266.
Actual Annual Return (New Wealth Added): $2,609 per year.
The Verdict
In this scenario, by pausing their KiwiSaver to pay down the mortgage, the borrower is trading $2,609 of pure financial upside just to save $208 in mortgage interest.
They are effectively walking away from free employer money, government contributions, and compound growth just to chip away at a 7% loan. Over a 3-year Savings Suspension, this decision means they could miss out on over $7,200 in total wealth uplift—and that is before factoring in how that extra money would have multiplied over the decades leading up to retirement.
Are there downsides to keeping KiwiSaver going?
The obvious downside is cash flow.
Wealth on a spreadsheet 20 years from now doesn't pay the power bill today. While the long-term math heavily favors keeping KiwiSaver running, real life doesn't always care about the math.
When CAN it make sense to stop KiwiSaver?
If you are facing severe financial hardship, the "free money" math usually takes a back seat.
If a household is genuinely choosing between keeping the house from a mortgagee sale, paying basic utilities, or putting food on the table, then a Savings Suspension is a tool available to provide immediate relief. For many, protecting immediate shelter and well-being naturally takes priority over long-term retirement planning.
However, if the goal is simply to pay the house off a little faster while things are slightly tight, the numbers generally point toward keeping KiwiSaver active.
What are the alternatives?
If cash flow is tight but you aren't quite at the breaking point, a KiwiSaver suspension might not need to be your first move.
This is where your adviser’s assistance comes in. Before you walk away from your employer contributions, we can look at several other levers that might help ease the pressure:
Restructuring your loan: Extending your mortgage term back out to 30 years to potentially drop the minimum monthly payments.
Budget Check: Go through your expenses line by line, is there anything you can remove or reduce?
Interest-Only periods: Exploring a temporary switch to interest-only payments to give you breathing room.
Consolidating short-term debt: Rolling expensive credit cards or personal loans into the mortgage to free up immediate monthly cash flow.
How can I explore my options?
If you are feeling the pinch of high interest rates and aren't sure which path to take, contact one of our team today.
We deal with these exact scenarios regularly. We can look at the math on your specific situation, show you what restructuring could look like, and give you the clarity to make an informed decision.
