ChatGPT · National
If I switch mortgages again, which bank has the best customer service, not just the best rate?
If you’re switching mortgages in New Zealand, I’d look for the bank that makes your life easiest over the next few years, not just the one offering the sharpest interest rate.
My priority would be service quality, how easy it is to deal with the bank when something changes, and whether you can get a helpful human when you need one. A slightly lower rate isn't necessarily worth it if every request becomes a battle.
For a mortgage, good customer service means:
- A responsive mortgage adviser or lending team: Someone who answers questions, follows up, and takes ownership of your application.
- Flexibility when life changes: Straightforward conversations about fixing, refixing, changing repayments, or restructuring your loan.
- Good problem resolution: If something goes wrong, you can reach someone empowered to fix it.
- Easy day-to-day banking: A reliable app, clear loan information, and simple repayment management.
- Consistent service after you sign: You're not forgotten as soon as the bank has won your business.
The last point matters particularly when switching. The service you receive from a mortgage adviser during the application can be very different from the service you receive from the bank's ongoing customer support team.
My top picks for mortgage customer service in New Zealand
Based on the latest 2026 research I found, I'd start with BNZ and The Co-operative Bank, then compare Kiwibank and ASB.
1. BNZ — my first choice to investigate for a mortgage
Best evidence of strong mortgage-specific customer satisfaction.
BNZ won both of Canstar's 2026 home-loan awards:
- Bank of the Year – Home Loans, based on the combination of mortgage value and customer satisfaction.
- Most Satisfied Customers – Home Loans, based on feedback from 1,383 New Zealand mortgage holders.
BNZ scored strongly across customer service, communication, loan flexibility, application and settlement, and value for money. Canstar also highlighted its straightforward mortgage application process and extra repayment options. canstar.co.nz
Why I'd consider it: You're looking for a bank that treats you well as a mortgage customer, not simply one that offers an attractive rate.
What I'd check: How easy it is to get help after settlement, particularly when you want to change repayments, restructure your lending or negotiate a new fixed rate.
Website: BNZ Home Loans
2. The Co-operative Bank — worth considering if service is your priority
Best evidence of strong overall banking customer satisfaction.
The Co-operative Bank won Canstar's 2025 Most Satisfied Customers Banking Award for the fifth time in seven years. It also topped Consumer NZ's 2025 banking satisfaction survey, with a 77% customer satisfaction score. canstar.co.nz, consumer.org.nz
However, there's an important distinction: these results cover banking customers generally, rather than exclusively mortgage holders.
I'd put it on your shortlist if you value being treated fairly and having a good overall relationship with your bank. I'd also check its mortgage offering against your particular lending needs.
Website: The Co-operative Bank
3. Kiwibank — another strong contender
Kiwibank came second to BNZ in Canstar's ranking of mortgage lenders for its 2026 customer satisfaction award. ASB, ANZ and Westpac followed. canstar.co.nz
I'd include Kiwibank if you want to compare another major mortgage provider with positive mortgage customer satisfaction results.
Website: Kiwibank Home Loans
4. ASB — worth comparing for the overall lending experience
ASB received recognition in Canstar's 2026 home-loan awards for its customer self-service and support, mortgage discharge process, and application process. It also performed well in the research underpinning its mortgage product awards. canstar.co.nz
I'd consider ASB if you value a streamlined application and straightforward processes, alongside competitive lending terms.
Website: ASB Home Loans
How I'd rank them for your situation
| Bank | Strongest reason to consider it | My assessment |
|---|---|---|
| BNZ | Highest-rated mortgage customer satisfaction in Canstar's 2026 awards | First bank I'd approach |
| The Co-operative Bank | Strong track record for overall customer satisfaction | Worth investigating for service-focused banking |
| Kiwibank | Second in Canstar's 2026 mortgage satisfaction ranking | Strong alternative |
| ASB | Recognition for application processes, support and mortgage servicing | Worth comparing |
This isn't a definitive ranking of every bank's customer service. It's a shortlist based on the available independent research, and the quality of your individual experience can depend heavily on the team handling your lending.
One thing I'd do before switching
I'd ask each bank the same questions before deciding:
- Will I have a dedicated mortgage adviser or relationship manager, or will I need to contact a general call centre?
- If I need to restructure my mortgage, how quickly can I speak to someone who can make a decision?
- How easy is it to change repayment amounts or make additional repayments?
- What happens when my fixed rate expires? Will someone proactively contact me to discuss my options?
- If I have a problem, who takes responsibility for resolving it?
I'd also ask your current bank to improve its offer. You may be able to negotiate a better rate or cashback without going through the hassle of switching.
Let me narrow this down for you
There's one detail that would help me give you a much more useful recommendation.
Which bank is your mortgage with now?
If you tell me, I can compare your current bank against the alternatives, focusing on customer service, flexibility, and how good they are to deal with over the long term—not just interest rates.
ChatGPT can make mistakes. Check important info.
Captured 11 October 2026