Business Bank Accounts for Shopify Stores (NZ & AU)

The legal answer and the practical answer are different, which is why this question generates so much conflicting advice.

Do I legally need a business bank account?

If you have a company: yes, effectively. A company is a separate legal entity and its money is not your money. Running company income through a personal account creates a records problem, muddies the separation that gives you limited liability, and makes your accountant's job considerably more expensive.

If you're a sole trader: no. There's no legal separation between you and the business, so there's no legal requirement to separate the accounts.

But sole traders should still do it, for reasons that have nothing to do with the law.

Why separate accounts matter even when they're optional

Your accountant charges by time. Handing over a personal account with groceries, Netflix and supplier payments interleaved means someone bills you to untangle it. A clean business account is materially cheaper at year end.

GST claims need evidence. If you're registered, you're claiming GST on business purchases. Those need to be identifiable. Mixed accounts make this slow and make errors likely.

You can see whether the business works. This is the real one. When business and personal money share an account, you cannot tell whether the business is profitable — the balance is a blend of trading performance and your personal spending habits.

It reduces audit friction. If IRD or the ATO ever look closely, "here's the business account" is a much shorter conversation than reconstructing it from a personal statement.

What account structure should I use?

For most Shopify stores, three accounts is the sweet spot.

1. Trading account. Everything in and out. Shopify payouts land here, suppliers, ads, apps and shipping are paid from here.

2. Tax account. GST and income tax set-asides, moved across weekly. Never spent on anything else. This single account prevents the most common way ecommerce businesses get into trouble — see how much to set aside.

3. Personal account. Where your pay lands, on a schedule, as a deliberate transfer rather than an ad-hoc grab.

Some owners add a fourth for stock or a buffer. Beyond four it becomes administration for its own sake.

What should I look for in a business account?

The features that actually matter for an ecommerce business:

Low or no monthly fee. Margins are thin enough.

Genuine accounting integration. Direct feeds to Xero or MYOB save real hours. Check the feed is automatic, not a manual file import.

Multi-currency, if you import. If you pay overseas suppliers in USD, being able to hold and pay in USD avoids paying a conversion spread twice.

Sensible transaction limits. Some starter accounts cap free transactions at a number a busy store passes easily.

Fast payment processing. Shopify payouts landing sooner is genuinely useful when cash is tight.

New Zealand and Australia specifics

In New Zealand, all the major banks — ANZ, ASB, BNZ, Westpac, Kiwibank — offer business accounts, and you'll generally need your NZBN and company incorporation details if you're a company. Sole traders can usually open one with an IRD number and ID.

In Australia, similarly across the big four plus a growing set of digital challengers. Companies need an ACN and ABN; sole traders operating under a business name need the ABN.

In both, opening the account is usually quicker than people expect — often the same day online for a sole trader, longer for companies because of director verification.

Common mistakes

Using a personal account "just for now." Six months later there are 2,000 mixed transactions and untangling them costs more than the account ever would.

Paying for personal things from the business account. The mirror image, and just as messy. If you do it by accident, tell your accountant rather than hoping.

Treating the balance as profit. Your trading account holds GST you owe and excludes bills you haven't paid. It's a cash position, not a profit figure — the two can point in opposite directions, especially in a month you bought stock.

That last one is worth sitting with. A healthy bank balance the week after a big sales period and before a supplier invoice tells you almost nothing. Knowing your actual profit — after COGS, ads, shipping and fees — is a separate exercise from watching your balance, and it's the one that tells you whether the business works. It's why we built Rev Room, though a well-kept spreadsheet answers the same question.

The short answer

Company: you need a separate account, effectively
Sole trader: not legally required, but do it anyway
Three accounts — trading, tax, personal — covers most stores
Prioritise low fees, real accounting integration, and multi-currency if you import
Your bank balance is not your profit

General information only, current as at 20 August 2026. Bank products and requirements change — check directly with the bank, and talk to your accountant about structure.