Your Progress 0%

How Refixing Your Mortgage Works

🔄 When Your Fixed Rate Ends

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.

Key Point: When a fixed term ends, you refix by choosing a new rate and term, usually from the options your lender offers. If you do nothing, the loan typically rolls onto the floating rate, which is usually higher, so passively letting it roll over can cost you. Refixing is also a natural moment to review your whole mortgage, compare your lender against others, and adjust your repayments or structure.

What Refixing Involves

  • Choosing a new fixed term, such as a shorter or longer period.
  • Locking in the interest rate for that term.
  • Optionally adjusting repayments or restructuring your loan.
  • Deciding whether to stay with your lender or consider moving.
Calculate.co.nz is proud to be partnered with Premium Homes, a recognised leader in eco-friendly, sustainable, and energy-efficient homebuilding. With a dedicated team and award-winning experience, they create homes that prioritise health, comfort, and long-term performance. Their founders, Andrew and Kelly, set out to raise the standard of residential construction in New Zealand by combining practical building expertise with a clear commitment to doing things better for homeowners.
Premium Homes: got a section? Let's build your eco home on it.
Advertise on this page

⚠️ The Rollover Trap

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.

Your fixed term reaches its end date
If you do nothing, the loan rolls to the floating rate
The floating rate is usually higher, lifting your payments
Choosing a new fixed rate in time avoids this cost

Act Before the End Date

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.

Do not let it roll silently: The single most common refixing mistake is simply not acting, and ending up on the higher floating rate. Set a reminder before your fixed term ends and make a deliberate choice.

⚖ Choosing Your New Term

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 choiceTrade-off
Shorter fixed termMore flexibility sooner, but you refix again soon and face whatever rates apply then
Longer fixed termMore certainty for longer, but you are locked in if rates fall and break costs apply if you exit early
Splitting the loanFixing portions for different terms spreads the risk of getting the timing wrong

Certainty Versus Flexibility

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.

Match the term to your life, not a forecast: Nobody reliably predicts rates. Choose a term based on your need for certainty, your plans for the property, and your comfort, rather than trying to outguess the market.

💡 Making the Most of a Refix

Treat It as a Review

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.

  • Negotiate the rate: the first rate offered is not always the best; it is often worth asking for a better one.
  • Compare other lenders: refix time is when refinancing to another lender is easiest, since there are usually no break fees at the end of a fixed term.
  • Consider raising repayments: if you can afford more, paying extra cuts the term and total interest.
  • Review your structure: splitting terms or adjusting amounts can better fit your situation.

Refix or Refinance?

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.

It is a negotiation, not a formality: Many borrowers accept the first refix rate without question. Asking your lender to match a competitor, or shopping around, can secure a lower rate, and on a mortgage even a small reduction is worth a lot over time.

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.

🎯 Test Your Knowledge

Quiz on Refixing Your Mortgage (20 Questions)

1. What does refixing your mortgage mean?
Choosing a new fixed rate and term when a fixed period ends
Selling your house
Paying off the loan
Switching to renting
2. If you do nothing when a fixed term ends, the loan usually:
Is cancelled
Rolls onto the floating rate
Becomes interest free
Is fully repaid
3. The floating rate is typically:
Higher than fixed rates
The lowest available
Always zero
Fixed for ten years
4. The most common refixing mistake is:
Refixing too early
Negotiating the rate
Not acting and ending up on the higher floating rate
Comparing lenders
5. What do lenders usually do before a fixed term ends?
Never tell you
Hide the end date
Contact you before a fixed term ends
Refuse to refix
6. What is a good habit for managing your fixed term expiry?
Forget the date
Mark the fixed term expiry in your calendar
Wait until after it rolls
Ignore lender letters
7. A shorter fixed term gives you:
Permanent certainty
No need to ever refix
A guaranteed low rate forever
More flexibility sooner, but you refix again soon
8. A longer fixed term gives you:
Total flexibility
No break fees ever
A floating rate
More certainty, but you are locked in if rates fall
9. What is the benefit of splitting your loan across different fixed terms?
Guarantees the lowest rate
Spreads the risk of getting the timing wrong
Removes all interest
Is never allowed
10. You should choose a fixed term based on:
A perfect prediction of rates
Your need for certainty and your plans, not a rate forecast
Your neighbour choice
The bank logo
11. A refix is a good moment to:
Ignore your loan
Stop paying
Sell up
Review your whole mortgage
12. The first refix rate offered by your lender is:
Not always the best; it is often worth asking for better
Always the lowest
Fixed by law
Non-negotiable
13. Refixing keeps you with:
Your current lender
A new lender
No lender
The government
14. The end of a fixed term is the natural point to consider refinancing because:
You can usually move without break costs
Break fees are highest then
It is illegal otherwise
Rates are always lowest
15. If you can afford it at a refix, raising repayments:
Increases interest
Has no effect
Cuts the term and total interest
Is not allowed
16. Locking in your next rate in advance helps you:
Pay more
Avoid drifting onto the floating rate
Lose your fixed rate
Break the loan
17. Refixing is best treated as:
A box to tick blindly
Something to avoid
A negotiation, not a formality
A reason to sell
18. On a mortgage, even a small rate reduction at refix is:
Meaningless
Only good for the bank
Impossible
Worth a lot over time
19. What does refinancing mean?
Staying with your lender
Selling the house
Paying cash
Moving the loan to a different lender
20. The best summary of refixing is:
Let it roll to floating
Always fix for the longest term
Act before the term ends, choose a term that fits your life, and negotiate and compare
Never review your loan

Return to Learning Centre

Related guides