Most New Zealand mortgages are split into fixed-rate periods, and when a fixed term ends, you have to decide what to do next. Refixing means choosing a new fixed interest rate and term with your existing lender for that portion of your loan. It happens regularly over the life of a mortgage, and the choices you make at each refix, the rate, the term, and whether you shop around, can save or cost you a lot over time.
The most important thing to know about refixing is what happens if you ignore it. When a fixed term expires and you have not chosen a new rate, the loan usually defaults to the lender floating rate, which is typically higher than fixed rates. Sitting on the floating rate by accident can quietly cost you more every month.
Lenders usually contact you before a fixed term ends, and many let you choose your next rate in advance, locking it in ready for the rollover date. Acting early means you avoid drifting onto the floating rate and have time to compare options. Mark the expiry date in your calendar so it never catches you out.
At each refix, you choose how long to fix for. Shorter and longer terms each have trade-offs, and the right choice depends on your circumstances and view of rates, not on guessing the market perfectly.
| Term choice | Trade-off |
|---|---|
| Shorter fixed term | More flexibility sooner, but you refix again soon and face whatever rates apply then |
| Longer fixed term | More certainty for longer, but you are locked in if rates fall and break costs apply if you exit early |
| Splitting the loan | Fixing portions for different terms spreads the risk of getting the timing wrong |
A longer fixed term gives you payment certainty and protection if rates rise, but locks you in if rates fall and can mean break fees if you need to exit early. A shorter term keeps you flexible but exposes you to whatever rates apply at the next refix. Splitting your mortgage across different terms is a popular way to avoid having your whole loan refix at one moment. See our guide on fixed versus floating mortgages and compare rates with the Mortgage Interest Rate Comparison Calculator.
A refix is an ideal moment to look at your whole mortgage, not just tick a box. Use it to check whether your repayments still suit you, whether you can afford to increase them to pay the loan off faster, and whether your lender is still competitive.
Refixing keeps you with your current lender. Refinancing means moving the loan to a different lender, often to get a better rate or features. The end of a fixed term is the natural point to consider both, because you can usually move without break costs. See our guide on refinancing.
Final word: refixing is choosing a new rate and term when a fixed period ends. Act before the end date so you do not drift onto the higher floating rate, choose a term that fits your life rather than a forecast, and treat each refix as a chance to negotiate, compare lenders, and adjust your repayments. This is general information, not personalised financial advice.
Quiz on Refixing Your Mortgage (20 Questions)
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