(18 September 2026 – New Zealand) New East & Partners research into New Zealand’s corporate banking market (NZ$20m–$750m turnover) surfaces a pattern that complicates the usual story about transaction banking (TB) as simply “the clearest cross-sell opportunity.”
Across the market, primary TB share and Main Financial Institution (MFI) share track each other closely, but not perfectly. And the size and direction of that gap tells two very different stories, depending on the bank.
Two groups, two strategies
Group one: TB as an anchor. For BNZ (23.5% primary TB share vs 22.5% MFI) and ANZ (30.4% vs 28.5%), the two numbers sit close together. That suggests transaction banking is doing what it’s best known for: protecting relationships the bank already owns, rather than actively pulling in new ones. For banks rebuilding acquisition muscle after a defensive post-2020 period, it is an important distinction – is TB used purely to retain, or redeployed as a genuine attack capability to win the operating relationship first and the fuller wallet second?
Group two: TB running ahead of the relationship. Westpac, HSBC, ASB, and Citi show the opposite pattern: transaction banking share outrunning overall relationship primacy. On one hand, this could mean transaction banking is doing exactly its job as a foot in the door. On the other hand, it raises a coverage question – is the rest of the bank converting that operating foothold into broader primacy fast enough, or is the TB franchise outpacing the relationship teams behind it?
The more striking number sits outside the named panel entirely. “Other” providers account for just 2.3% of primary TB relationships but 13.3% of MFI relationships, by far the widest gap in the analytics. That’s a substantial pool of main-bank status sitting with providers whose transaction banking capability hasn’t yet caught up with their broader relationship strength, potentially a case for building out TB capability to defend and then extend those relationships, rather than treating transaction banking as a mature, static category.
All in all, the research suggests this isn’t about “how do we cross-sell harder.” It’s: is TB being used to defend relationships you already have, or to win the ones you don’t? The answer looks different bank by bank, and increasingly, that distinction may matter more than the relationship share numbers themselves.