Westpac home loan rates are changing from 21 September 2026, with the bank reducing its special 2-year fixed home loan rate while increasing rates across other fixed terms.
Westpac’s special 2-year fixed rate will fall by 0.16 percentage points to 5.29% p.a. At the same time, its other special fixed home loan rates will increase by between 0.10 and 0.26 percentage points.
The changes come as wholesale funding costs have risen. Westpac says geopolitical tensions have contributed to higher wholesale rates, which affect the cost of funding longer-term lending.
For homeowners coming up for a mortgage refix, or people considering a new home loan, the latest Westpac home loan rates are another reminder that choosing a fixed term involves more than simply looking at today’s lowest rate.
Westpac’s new special fixed home loan rates take effect from Monday 21 September 2026.
| Fixed term | New special rate | Change |
|---|---|---|
| 6 months | 4.89% | +0.14% |
| 1 year | 5.19% | +0.20% |
| 18 months | 5.45% | +0.10% |
| 2 years | 5.29% | -0.16% |
| 3 years | 5.59% | +0.20% |
| 4 years | 5.65% | +0.26% |
| 5 years | 5.75% | +0.26% |
These are Westpac’s advertised special fixed rates. Eligibility criteria, lending conditions and other terms apply, so borrowers should check the current rate information directly with Westpac before making a decision.
The unusual part of the latest Westpac home loan rates announcement is that the 2-year rate is falling while almost every other fixed rate is increasing.
Westpac says rising wholesale funding costs are one reason for the changes. The bank says geopolitical tensions have recently contributed to a sharp increase in wholesale rates, which it uses to fund longer-term lending.
Westpac has also said it is absorbing some of the increased funding costs rather than passing the full increase on to borrowers.
Fixed mortgage rates are influenced by more than the Official Cash Rate (OCR). Banks also consider wholesale funding costs and other costs associated with providing fixed-term lending.
This means different fixed mortgage terms can move in different directions.
In the latest Westpac announcement, the 2-year special rate decreased, while the 6-month, 1-year, 18-month, 3-year, 4-year and 5-year special rates increased.
The latest Westpac announcement does not mean that all New Zealand mortgage rates are falling.
Instead, the changes show that mortgage pricing can differ significantly between fixed terms.
For borrowers, the relevant question may therefore be broader than:
“What is the lowest mortgage rate?”
It may also be important to consider:
The latest mortgage-rate changes also follow a recent increase in the Official Cash Rate.
On 2 September 2026, Westpac announced that it would increase its variable home loan rates by 0.25 percentage points following a 0.25 percentage point OCR increase.
Its Choices Floating and Offset rates increased to 6.39% p.a., while Choices Everyday increased to 6.49% p.a..
However, Westpac did not change its fixed lending rates at that time.
Not necessarily.
A lower advertised rate does not automatically make one fixed term suitable for every borrower.
Choosing a mortgage term involves considering your personal financial circumstances, expected cash flow, risk tolerance and future plans.
For example, a borrower who values repayment certainty may have different priorities from someone who expects their financial circumstances to change within the next year.
The total cost of borrowing and the flexibility of the loan should be considered alongside the advertised interest rate.
If your fixed-rate period is coming to an end, consider reviewing your position before the refix date.
Even a relatively small change in an interest rate can affect household cash flow when applied to a large mortgage balance.
For example, a borrower with a $600,000 mortgage would experience a different annual interest cost at 5.29% compared with 5.75%, before considering principal repayments and the way the loan is structured.
This is why borrowers should look at the overall repayment impact rather than focusing only on the percentage difference between two advertised rates.
Property investors may need to consider mortgage rates alongside rental income, operating expenses, tax obligations, interest costs and cash flow.
A change in mortgage rates can affect the amount of cash available to meet other property-related expenses.
Investors should also consider their broader tax position rather than treating the mortgage interest rate as an isolated cost.
DFK Orb360 O’Halloran can assist property investors with accounting, tax planning and financial reporting. Learn more about our accounting services for property investors in Wellington.
Westpac’s advertised special 2-year fixed home loan rate is 5.29% p.a. from 21 September 2026. This represents a 0.16 percentage point decrease from the previous special rate.
Yes. From 21 September 2026, Westpac increased its special fixed rates for 6 months, 1 year, 18 months, 3 years, 4 years and 5 years.
Westpac says higher wholesale funding costs have contributed to the latest rate changes. The bank says recent geopolitical tensions have contributed to increased wholesale rates.
Based on the advertised special rates effective from 21 September 2026, Westpac’s lowest fixed special rate is 4.89% for six months. The two-year special rate is 5.29%.
It depends on the fixed term. Westpac is reducing its 2-year special fixed rate while increasing its other advertised special fixed rates from 21 September 2026.
There is no single fixed term that is suitable for every borrower. The decision depends on your financial circumstances, expected cash flow, future plans and tolerance for changes in repayments.
A fixed mortgage rate remains fixed for an agreed period, subject to the loan’s terms and conditions. A floating rate can change over time. Borrowers should consider both the interest rate and the flexibility associated with each option.
Higher mortgage rates can increase interest costs and therefore increase loan repayments or the amount of income required to service the debt. The effect depends on the mortgage balance, loan structure, repayment frequency and interest rate.
An accountant can help you understand your broader financial position, cash flow, tax obligations and financial records. Mortgage lending decisions and product recommendations should be discussed with an appropriately qualified mortgage or financial adviser.
Mortgage-rate movements can be particularly relevant for property investors, business owners with property debt and people whose personal and business finances are closely connected.
Rather than looking at an interest rate in isolation, consider how changes could affect your overall cash flow, tax position, debt servicing and financial planning.
This can be especially important when preparing budgets or deciding whether a property investment remains financially sustainable under different interest-rate scenarios.
Start by understanding your current position before comparing new rates.
Review your mortgage balance, current interest rate, repayment amount, fixed-rate expiry date and expected income and expenses.
You can then model how different interest rates could affect your household or investment-property cash flow.
If you own a rental property or operate a business alongside your property investments, consider the tax and accounting implications as part of your broader financial planning.
Mortgage rates can affect more than your monthly repayment. For property investors and business owners, changes in borrowing costs can also affect cash flow, profitability, tax planning and financial decisions.
DFK Orb360 O’Halloran provides accounting and tax advisory services for property investors and businesses across New Zealand.
Have questions about your accounting, tax planning or property investment position? Send us your details and our team can get in touch.
Disclaimer: This article provides general information about current mortgage-rate developments and should not be considered personal financial or mortgage advice. Interest rates can change without notice, and lending criteria and eligibility requirements apply. Consider your individual circumstances and seek appropriate professional advice before making financial decisions.
Copyright © 2025 Marketing Transformers | All Rights Reserved.
09 377 4238
Level 2, 6 Kingdon Street, Newmarket, Auckland
help@orb360.co.nz