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I'm about to refix my home loan. Is it worth splitting it across different fixed terms if I want fairly steady repayments?
Yes — splitting your New Zealand home loan across different fixed terms can be a good way to keep repayments relatively steady, especially if you want to avoid having your entire mortgage come up for refixing at once.
The key is that splitting helps smooth out the timing of interest-rate changes. It doesn't guarantee lower interest costs or completely stable repayments.
How splitting your mortgage works
Say you have a $600,000 mortgage. Instead of fixing the whole amount for one year, you could divide it into three portions.
Illustrative example — $600,000 mortgage
$200,000 · 1-year fixed
Short term
Refixes first, giving you an earlier chance to benefit if rates fall.
$200,000 · 2-year fixed
Provides a middle ground between flexibility and certainty.
$200,000 · 3-year fixed
Locks in a larger share of your repayments for longer.
When each portion expires, only that portion needs to be refixed, so a rate change affects part of your mortgage at a time.
You don't need to use three portions, either. Two different terms can provide a useful balance without making your mortgage unnecessarily complicated.
The main benefits and drawbacks
| Benefits | Trade-offs |
|---|---|
| Less of your loan is exposed to a rate change at once | You may not get the lowest total interest cost |
| Some repayments stay protected by longer fixed terms | You need to keep track of multiple refix dates |
| You can take advantage of falling rates on the shorter-term portion | Switching banks can be harder when loan portions expire at different times |
| You can spread the risk of choosing a single fixed term | You may miss out if rates fall and you've locked in for longer |
These trade-offs are consistent with guidance from Sorted NZ and ANZ NZ. Types of mortgages in New Zealand, and how to choose » SortedThe benefits of splitting your home loan104
4.108 The very high proportion of 1-3 year fi
What I'd consider if steady repayments are your priority
I'd look at two or three fixed portions, with a meaningful share on a longer term.
- For maximum certainty: Fix most or all of the mortgage for the same longer term. This gives you the simplest budgeting, although the entire loan will be exposed to rates when that term ends.
- For a balance of certainty and flexibility: Split between a shorter and a longer term, such as one and two years.
- For more gradual refixing: Use a mix such as one, two and three years, accepting the extra administration.
One important point: splitting your loan doesn't necessarily make your repayments perfectly steady. When a portion expires, its new rate can push your total repayments up or down. If you have a tight budget, choose a structure that you could still afford if rates were higher at the next refix.
Also check whether you might move house, make a large lump-sum payment or switch lenders soon, because multiple fixed terms can make those changes more complicated.
Let's make this specific to your mortgage
I can help you compare a couple of structures based on your actual situation. Three details would make the biggest difference:
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Captured 11 October 2026