ANZ vs ASB vs BNZ vs Westpac: Home Loans Compared 2026

The honest starting point

ANZ, ASB, BNZ and Westpac hold most of NZ's mortgage market, watch each other's pricing daily, and usually sit within a whisker on carded specials. Choosing between them on the advertised rate alone is a coin toss. Where they genuinely differ:

Where the big four actually differ

How to actually choose

1. Start with approval likelihood: the sharpest rate in the market is irrelevant at a bank whose credit policy dislikes your file. Match your scenario (income type, deposit, property) to appetite first.
2. Then maximise the package: rate, cash contribution, and fee waivers — negotiated together, with competing banks quoted against each other.
3. Then pick structure: if you want offset or revolving flexibility, compare the actual product mechanics and fees, not the brochure names.

This is precisely a broker's home turf: we see which of the four is paying up for business this month, which credit teams are being flexible, and which assessment queues are blown out. That intelligence changes monthly — any static 'best bank' ranking is out of date by the time you read it.

Beyond the big four

Kiwibank, TSB, SBS, The Co-operative Bank and Heartland regularly undercut the majors to win share, and non-bank lenders serve files the majors decline. A big-four-only comparison is a comparison of two-thirds of the market.

Frequently asked questions

Which big-four bank has the lowest mortgage rates in NZ?

It rotates. Advertised specials sit close together, and the best negotiated deal depends on your LVR, loan size and the bank's appetite that month. Compare negotiated offers, not carded rates.

Do I get a better home loan deal from my own bank?

Not automatically — existing-customer loyalty rarely beats a competitive tension created by comparing all four (plus the challengers) at once.

Which bank is best for self-employed borrowers?

Credit appetite for self-employed income differs across the four and changes over time. The right answer depends on your financials' shape — this is a scenario where broker placement matters most.

Can a broker get better rates than going direct?

Brokers access the same pricing plus the competitive tension of multiple banks bidding. The outcome is usually equal-or-better pricing with far less legwork — and $0 fee for standard residential lending.