Zeller vs Square: Which Is Better for Australian Small Businesses?

 This information is general in nature and doesn't take into account your personal financial situation or needs. Consider seeking independent financial advice before making a decision. 

Square and Zeller are two of the most recognisable names in small business payments — but they come at the problem from different directions. Square built a global ecosystem of point-of-sale software and hardware that payments sit inside. Zeller is Australian-built, banking-first, and designed around the idea that your transaction account, cards, payments, and savings should all live in one place with no fees attached.

Both are strong, fee-free-to-join platforms with no lock-in contracts. Here's how they actually differ.

Hardware and Setup

Square sells its terminals and readers outright — there's no ongoing rental, but you pay upfront for the hardware itself. The range is broad: a basic reader for tap payments, a full terminal, and POS stands, with options suited to retail counters, hospitality floors, and mobile setups.

Zeller also sells its terminals outright with no rental fees, and its devices double as a standalone EFTPOS unit and card reader without needing a separate POS system underneath them.

Verdict: Both are comparable here — no rental traps either way. Square has the wider hardware range if you need multiple device types across a larger setup; Zeller's terminal is simpler if you just need a capable all-rounder.

Payment Processing and Fees

Square charges a flat per-transaction rate on card payments, which applies consistently whether you're taking payments in person, online, or via invoice. Businesses with higher annual turnover can apply for custom, tailored rates.

Zeller's EFTPOS pricing is also a flat per-transaction rate with no lock-in, and historically has sat slightly below Square's standard rate — though both providers periodically adjust pricing, so it's worth comparing current rates directly on each provider's site before deciding.

Verdict: Close to a toss-up on pure transaction cost — the gap, where it exists, is usually small. The bigger differentiator is what's bundled around the payment, which is where the next sections matter more.

Software Ecosystem and POS

This is Square's clear strength. Beyond payments, Square offers a full suite of business software — point-of-sale systems tailored for restaurants, retail, and appointment-based businesses, plus an online store builder. Many of these come as paid add-on plans, but the depth of the ecosystem is hard to match if you're running a business that needs proper rostering, inventory, or booking management alongside payments.

Zeller doesn't try to compete on POS software depth. Its focus is the banking and cards side — invoicing, a transaction account, and team debit cards sit alongside the EFTPOS terminal, but there's no equivalent to Square's restaurant or retail POS suites.

Verdict: If your business genuinely needs POS software — table management, inventory, online ordering — Square's ecosystem is more mature and built for that. If you just need to take payments and otherwise run your banking, Zeller's simplicity is an advantage rather than a gap.

Banking and Cash Flow

Square settles funds to your linked bank account, generally the next business day, with an instant transfer option available for faster access. It doesn't offer its own transaction account — Square sits on top of whatever bank account you already use.

Zeller is built around its own free business transaction account, with a BSB and account number, PayID, BPAY, and bank transfers — so instead of payments settling out to a separate bank, everything can run through one account. It also includes a savings account that pays a noticeably higher rate than the major banks, with no lock-in on moving funds between accounts.

Verdict: This is Zeller's strongest point of difference. If you'd rather not maintain a separate business bank account alongside your payments provider, Zeller consolidates that. Square assumes you already have a bank account it settles into.

Cards and Expense Management

Zeller again has the edge here: free, unlimited physical and virtual business debit cards tied directly to the transaction account, useful for team spending and online subscriptions without a separate expense platform. Square doesn't offer an equivalent debit card product — it's focused on the payments and software side rather than card issuing.

Who Should Choose Which?

• Choose Square if you need a proper POS system — hospitality floor management, retail inventory, online ordering — and you're happy to keep your existing business bank account separate from your payments provider.
• Choose Zeller if you want payments, banking, team debit cards, and savings consolidated into one free platform, and you don't need Square's deeper POS software.

For businesses that are payments-heavy with complex POS needs, Square's ecosystem is genuinely hard to beat. For businesses that want to simplify banking and cut out fees across accounts, cards, and savings in one go, Zeller is the more complete package.

If you're weighing up Zeller against other Australian providers more broadly, our Zeller vs Tyro comparison covers how it stacks up against another local alternative, and our full Zeller review goes into more detail on its banking and savings features.