Mortgage guide · New Zealand
Refix vs Refinance a Mortgage NZ — Guide
Compare refixing with your current New Zealand lender against refinancing to another bank, including rates, break fees, legal costs, cashback and structure.
Reviewed 26 August 2026
Reviewed by KiwiTools editorial team — NZ mortgage researchers using government and lender-source methodology
General information only, not financial, lending or legal advice. Ask the lender for a current written quote, fee and contract-specific repayment limits.
Key points
Refix or refinance?
Refixing chooses a new rate or term with the existing lender; refinancing usually moves the home loan to another lender.
Compare the full benefit after break costs, legal and valuation costs, cashback clawback and any new incentive.
Loan structure, service and future plans can matter more than a small advertised-rate difference.
Refix and refinance solve different problems
Refixing changes pricing with the current lender. Refinancing replaces lending and must earn back switching costs.
| Check | Refix | Refinance |
|---|---|---|
| Lender | Stays the same | Changes or loan is replaced |
| Legal/valuation work | Usually limited | May be required |
| Cashback risk | Usually no switch clawback | Existing cashback may be repayable |
| Best reason | Choose a new rate/term simply | Material net saving or better structure |
Refixing is a rate decision inside the existing relationship
At refix, the current lender offers new fixed terms or floating options. There is usually less paperwork than changing banks, and no need to pretend a small advertised rate gap automatically justifies a move.
Negotiate anyway. Bring competing rates and ask about retention pricing, but compare the complete structure rather than one fixed term in isolation.
Refinancing must repay its switching bill
A new lender can offer a better rate, loan structure or cashback. Against that sit legal work, valuation, discharge fees, break costs and any old cashback clawback.
If moving costs $4,200 and saves $175 a month, simple break-even is 24 months. A switch is usually worthwhile only when the household expects to keep the benefit beyond that point.
Related: mortgage break fees Related: mortgage cashback clawback Related: split mortgage fixed terms
Move for a material improvement, not for theatre
Refinancing can be the right call when the net saving is clear or an offset, revolving facility or service issue genuinely matters. Chasing every promotional headline creates paperwork and repeated clawback periods.
Get both lenders’ offers in writing on the same balance, term and repayment basis. Then stress-test the proposed loan at its post-discount rate.
Frequently asked questions
What is the difference between refix and refinance?
Refixing stays with the existing lender and chooses new pricing or a term; refinancing usually replaces the loan through another lender.
Is refinancing worth it for a lower rate?
Only when the expected benefit exceeds all switching costs and remains suitable for the planned holding period.
Do I need a new approval to refinance?
Generally yes. The new lender assesses the application, security and documents under its current policies.
Should I refinance before my fixed term ends?
It may create break costs. Request the current payout and break information, then compare waiting until expiry.
Put the guide into practice
Continue with related KiwiTools calculators
Test your own numbers, compare scenarios and return to the guide to check assumptions and limitations.