Square vs Zeller vs Stripe: Payments and POS for Australian Businesses

Merchant fees are one of the few costs in a small business that you pay on every single dollar of revenue, every day, forever. A difference of a few tenths of a percentage point sounds like nothing on a single flat white or a single invoice. Across a year of trading it is often the difference between covering a casual shift and not.

That is why "which is best, Square, Zeller or Stripe?" is the wrong question. All three are competent, well-run providers that will take money reliably. What separates them is fit: where your revenue actually comes from, how fast you need it in your account, whether you need real point-of-sale software or just a way to charge a card, and how much you value being able to ring someone in Australia when a terminal dies at 8am on a Saturday. This comparison is for Australian operators — cafes, salons, mobile trades, retail and online or services businesses — and focuses on what genuinely differs.

At a glance

	Square	Zeller	Stripe
Origin	US (Block, Inc.), long-established in Australia	Australian-founded and Australian-based	US (Stripe, Inc.), global
Core strength	Point-of-sale software depth and ecosystem	Low in-person rate plus a bundled AU business account	Online payments, subscriptions and platform infrastructure
In-person rate	Competitive flat rate	Typically the lowest headline flat rate	Percentage plus a small fixed amount
Online rate	Higher than its in-person rate	Higher than its in-person rate	Very competitive, custom pricing at volume
Settlement	Next business day standard	Next business day standard, same-day options	Rolling payout, typically a couple of business days
Business account	No	Yes, fee-free with its own BSB	No
POS software	Deepest of the three	Solid, focused, improving	Effectively none
Developer platform	Good	Limited	Best in class
Hardware range	Widest, from cheap reader to full register	One strong all-in-one terminal plus register	Developer-oriented readers

All pricing described here is indicative at the time of writing and moves regularly. Confirm current rates, fees and hardware prices directly on each vendor's Australian website before you commit.

The verdict. If you run a counter and want the software to do the heavy lifting — menus, modifiers, tables, staff, inventory, bookings — Square is the most complete package. If you run a counter and mostly want to keep more of each transaction while banking locally, Zeller is the sharper commercial deal and the bundled business account is a genuine advantage, not a gimmick. If most of your revenue arrives through a website, an app, subscriptions or a marketplace, Stripe is a different category of product. Plenty of Australian businesses sensibly run two of them.

Square

Square is the incumbent. It has been in Australia long enough that most hospitality staff have used the app, most accountants have reconciled it, and most of the awkward edge cases have been ironed out.

Who it suits. Businesses where the point of sale is the operational hub, not just a card reader — cafes and restaurants with menus, modifiers and table service, retailers needing variants and stocktakes, salons and clinics needing an appointment book, and anyone who wants one vendor for payments, POS, loyalty and reporting.

Strengths. The software is the product. Square's free tier is unusually capable for a business that just needs to sell things and see reports, and its paid tiers add depth that would normally require a separate POS vendor. The hardware ladder is the broadest of the three: start with a pocket reader for a market stall, progress to a full countertop register, never change provider. The app and integration ecosystem is the largest here, which matters when you need something niche — a loyalty program, a kitchen display, a stock system. Invoicing, payment links, gift cards and a basic online store are bundled.

Genuine weaknesses. The headline in-person rate is competitive but generally not the lowest available in Australia, and at volume that gap is real money. Online and card-not-present rates step up noticeably, so a business with a heavy invoicing or e-commerce mix pays more than it might elsewhere. The breadth of the ecosystem is also its cost: a lot of product surface to learn, and features you do not use still clutter the interface. Square is a global operation, so while local support exists, the roadmap is not set with Australian specifics first. And like any aggregator-model provider, it can hold funds during a risk review — uncommon, but resolution tends to feel process-driven rather than personal.

Standout capability. Nobody else here ships a real, mature point-of-sale application. If you need POS rather than just payment acceptance, Square is competing against dedicated POS vendors and holds its own.

Zeller

Zeller is the Australian challenger, built for the Australian market rather than adapted to it. That shows up in ways that are easy to underrate until you are operating.

Who it suits. Australian businesses taking most of their payments in person, who care about the effective rate and want the money landing in an account they can spend from immediately — cafes, mobile trades, salons, market operators, small retail.

Strengths. The headline in-person rate is typically the lowest of the three and the pricing is refreshingly simple. The bundled Zeller Transaction Account is the real differentiator: a fee-free Australian business account with its own BSB and account number, so takings settle into an account you actually spend from rather than sitting in a processor's balance waiting for a payout run. Add Zeller debit cards for staff and expenses and you have removed a layer of transfer delay from your cashflow. Same-day settlement into that account is available. Support is Australian-based on Australian hours, and the terminal is a well-built all-in-one Android device that handles payments, receipts, refunds and basic selling without a separate iPad.

Genuine weaknesses. Zeller is a younger company with a narrower product. The POS software is capable and improving, but it does not match Square's depth for complex hospitality or multi-location retail, and the third-party app ecosystem around it is much smaller — if you need a specific integration Square already has, you may be waiting. The online and card-not-present side is real but is not where the product is strongest; an e-commerce-heavy business will find Square and Stripe better developed there. The developer API surface is limited. Hardware choice is narrower too: one strong terminal and a register, rather than a ladder of options at every price point.

Standout capability. Bundling merchant acquiring with a genuine business bank account, settled locally and fast. No overseas-headquartered provider in this comparison does that for Australian businesses.

Stripe

Stripe is a different kind of product wearing similar clothing. It is payment infrastructure first, everything else second.

Who it suits. Online-first businesses, subscription and membership models, SaaS, and marketplaces that need to pay out to third parties — any business where a developer is building the payment flow rather than installing an app.

Strengths. The APIs are the industry reference point and the documentation is genuinely excellent, which reduces build cost in a way no pricing page shows. Subscription billing, dunning, proration, trials, saved cards, disputes and multi-currency are first-class rather than bolt-ons, and for marketplaces needing to split payments and pay out third parties the connected-account model is the mature option. Fraud tooling is sophisticated. Hosted checkout and tokenised fields keep raw card data out of your systems, keeping PCI scope small. For businesses selling beyond Australia, international card and currency handling is more complete than either alternative.

Genuine weaknesses. Stripe is not a point-of-sale system, and businesses that try to use it as one end up building or buying the missing pieces. Its in-person offering works, but the hardware is developer-oriented and assumes you have software to run on it. Domestic rates are structured as a percentage plus a fixed cents amount, which punishes low-value transactions — on small tickets, that fixed component dominates. International cards and currency conversion carry meaningful extra cost. Payouts sit further behind than the local providers by default, a real cashflow consideration for a small business. Support is documentation-first and ticket-driven: fine when debugging an integration, frustrating when money has stopped moving.

Standout capability. Everything programmable. If your payment flow needs logic — usage billing, split payments, complex subscriptions, embedded finance — Stripe is not just ahead, it is the default.

Head to head

What you'll actually pay

Headline rates are marketing. Your effective rate is what matters, and it depends on three numbers you already have: average transaction value, monthly card volume, and your split between card-present and card-not-present.

Work it out properly:

1. Pull twelve months of takings and calculate your true average transaction value — hospitality operators consistently guess high.
2. Split volume into in-person, online, invoice and manually keyed; these attract different rates at every provider.
3. Apply each provider's current published rates to each bucket, including any fixed per-transaction cents component.
4. Add monthly software fees for the POS tier you would actually need, not the free one, and amortise hardware over 24 months.
5. Divide the total by your annual card revenue. That number, not the headline rate, is your cost of acceptance.

The pattern to keep in mind: on small average transaction values, a percentage-plus-fixed-cents model is expensive relative to a flat percentage, because the fixed component is a large share of a $6 coffee. On a $2,400 trade invoice the fixed component is irrelevant and the percentage dominates. That single dynamic explains most of the "wrong provider" stories you hear. Model the tail too: chargeback fees, refund handling, currency conversion if you sell overseas, and faster settlement if you plan to use it routinely.

Settlement speed and cashflow

For a small business, when money arrives is often more important than the fee on it.

	Standard settlement	Faster option	Lands in
Square	Next business day	Available for a fee	Your existing bank account
Zeller	Next business day	Same-day options	Zeller account or your bank
Stripe	Rolling, typically a couple of business days	Instant payouts for a fee	Your existing bank account

Three practical notes. "Next business day" excludes weekends and public holidays everywhere, so a Friday night trade generally lands Monday or Tuesday whichever provider you use. Daily cut-off times matter more than the marketing copy suggests; a late-evening venue can systematically miss the cut-off and run a day behind. And new merchants sometimes face a longer hold on their first payouts while identity and risk checks complete — ask before your first big trading week, not during it.

Zeller's structural advantage is that settling into its own account removes the inter-bank transfer step entirely. If cashflow timing is a live constraint, that is worth more than a small rate difference.

Hardware

Square offers the widest ladder: a low-cost reader that pairs with a phone or tablet, a self-contained handheld terminal with a receipt printer, and a full countertop register. Zeller's approach is narrower and more opinionated — a well-built all-in-one Android terminal that needs no second device, plus a register for fixed sites. For a mobile tradie or single-counter cafe, "one device that does everything" is often exactly right. Stripe's readers are built for developers embedding card-present payments into their own software: reliable components rather than complete solutions.

All three support Tap to Pay on supported phones, letting you accept contactless payments with no hardware at all. Check device and operating system eligibility before relying on it — the requirements are specific and an older phone may not qualify. Tap to Pay works well as a backup or for a second staff member, but most businesses taking payments all day still prefer a dedicated terminal with a receipt printer and a real battery.

Online versus in-person strength

This is the clearest dividing line in the comparison. Purely in-person, Zeller and Square are the serious options and Stripe is over-engineered for the problem. Purely online, Stripe wins comfortably; Square's online tools are fine for a simple store but no match for Stripe's billing and checkout depth. If you do both, be honest about the ratio — a cafe with a small online ordering sideline should optimise for the counter, and a subscription business that occasionally sells at markets should optimise for the web.

POS and back-office features

Square wins on depth: menus and modifiers, table maps, course management, inventory with variants and stocktakes, purchase orders, appointments, staff permissions, timesheets, loyalty and multi-location reporting, with the app marketplace filling the gaps. Zeller covers the core competently — selling, item libraries, basic inventory, refunds, reporting, invoicing, and a clean, fast dashboard. Enough for a large share of Australian small businesses and noticeably less cluttered than Square; not enough for a busy multi-room restaurant or a retailer with thousands of SKUs. Stripe has no POS layer to speak of.

On accounting, all three connect to Xero, and all three work with MYOB directly or through a connector. The detail worth checking before you commit is whether merchant fees import as separate transaction lines. When they do, reconciliation is trivial and your reporting shows your true cost of acceptance. When they do not, your bookkeeper spends time every month backing fees out of net settlements.

Developer and platform flexibility

If you are not building software, skip this. If you are, the ranking is unambiguous. Stripe is the platform: connected accounts, split payments, usage-based billing, webhooks that behave, SDKs in every language, test modes that mirror production. Square has real and useful APIs, but they principally extend Square's own commerce data rather than serving as a general-purpose payments platform. Zeller's API surface is the narrowest; it is a product company, not a developer platform, and does not pretend otherwise.

Support when payments break

Nobody weighs this properly until the day it matters. Zeller is strongest for Australian operators: Australian-founded, Australian-based support, Australian hours, phone-first. When a terminal fails during a Saturday service, that is worth a lot. Square has local support plus a very large documentation and community base that resolves most problems quickly, though you are ultimately dealing with a global support organisation and its processes. Stripe's support is documentation-first and ticket-driven — arguably better for a developer debugging at 11pm, weakest of the three for a shop owner whose payments have stopped. Whichever you choose, keep a fallback: a second reader, a phone with Tap to Pay enabled, or a payment link you can text to a customer. Every provider has outages.

Which should you choose?

Cafe or hospitality venue with a counter. If you need menus, modifiers, table service or a kitchen workflow, Square — the software depth pays back the rate difference in labour saved and errors avoided. For simpler operations, such as a takeaway counter or a coffee window with a short menu, Zeller, and take the lower rate and faster settlement. Small transaction values make Stripe's fixed per-transaction component unattractive here.

Mobile tradie taking payment on site. Zeller. One rugged all-in-one terminal, a low in-person rate, invoicing when you need it, and takings landing in an account with a card attached so you can buy materials the next morning. Keep Tap to Pay on your phone as a backup for the day you leave the terminal on the ute. If most of your work is quoted and invoiced rather than paid on the spot, compare card-not-present rates carefully — that is where the money actually moves.

Salon or clinic with bookings. Square, if having the appointment book and payments in one product matters — and for most salons it does, because no-shows, deposits, rebooking and client history all live in one place. Zeller if you already run a booking platform you like and simply want cheaper acceptance underneath it.

Retail with inventory. Square, unless your SKU count is small. Variants, stocktakes, purchase orders and multi-location visibility are hard problems and Square has solved them. Zeller is better for a small, focused range where you mostly need to sell quickly and keep the rate down.

Online-first, subscription or marketplace business. Stripe, without much hesitation. Investigate custom or volume pricing once you are processing meaningfully — the published flat rate is a starting point, not the only option.

Both in-person and online. Run two: Stripe for the web, Zeller or Square for the floor, both feeding Xero. The reconciliation overhead is modest and you get the best of each channel. If you strongly prefer a single vendor and in-person volume dominates, Square is the most credible one-provider answer — it is the only one of the three genuinely competent at both.

Surcharging, least-cost routing and staying compliant

Two Australian-specific mechanisms are worth understanding properly, because they affect your economics and carry obligations.

Surcharging. Australian merchants are permitted to surcharge card payments, but the amount is regulated. Under the Reserve Bank of Australia's framework, a surcharge must not exceed your actual cost of acceptance for that card type — what it genuinely costs you to accept that card, including merchant service fees and reasonably attributable related costs. Surcharging above your cost is excessive surcharging, which the ACCC enforces. Practically, a blanket round-number surcharge applied to every card is a risk if you have not checked it against your real costs, and your surcharge should be reviewed whenever your rates or card mix change.

It is also an area in active flux: the RBA has been reviewing card payments regulation in Australia, including proposals that would change how and whether surcharging applies to designated card networks. Do not rely on what was true a year ago, and do not rely on this article. Check the current guidance published by the RBA and the ACCC, and get advice from your accountant before you set or change a surcharge.

Least-cost routing. Most Australian debit cards can be processed over more than one network. Least-cost routing — also called merchant choice routing — sends an eligible contactless debit transaction down the cheaper network rather than defaulting to the scheme branded on the card. On interchange-based pricing this can reduce debit costs noticeably. The nuance on flat-rate pricing, which is what all three mostly offer small businesses, is that any routing saving may already be reflected in the headline rate rather than itemised on your statement. That does not make it worthless — it is part of why flat rates can be as low as they are — but ask each provider directly how routing applies to your plan and whether it is enabled by default on your terminal.

PCI and data. You retain PCI DSS obligations as a merchant, but all three providers are architected to keep raw card data out of your environment. A provider-supplied terminal in person, plus a hosted checkout or tokenised fields online, generally puts you in the simplest self-assessment category. The expensive path is building your own card capture form; there is almost never a good reason for a small business to do that.

GST on fees. Treatment varies by provider and fee type. Some merchant service fees are treated as input-taxed financial supplies with no GST component, while hardware and some software subscriptions carry GST you may be able to claim. Work from the tax invoices and statements your provider issues rather than assuming a uniform treatment, and have your accountant confirm the coding.

Frequently asked questions

Which is cheapest for Australian card payments? For card-present transactions Zeller generally advertises the lowest flat in-person rate, with Square close behind, while Stripe's percentage-plus-fixed-cents structure penalises small tickets. Online, Stripe is typically most competitive. Rates change, so model your own numbers against current published pricing.

How quickly does money reach my Australian bank account? Square and Zeller both settle to an Australian BSB and account number next business day as standard, with faster options; Zeller can settle same day into its own business account. Stripe typically pays out a couple of business days behind, with instant payouts for a fee. Weekends, public holidays, cut-off times and new-merchant risk checks all affect when funds land.

Can I pass card fees on to customers? Yes, but within limits. A surcharge must not exceed your actual cost of acceptance for that card type under the RBA's framework, and the ACCC enforces the prohibition on excessive surcharging. Settings have been under review, so check current RBA and ACCC guidance and take advice from your accountant first.

What is least-cost routing and does it save me money? It routes eligible contactless debit transactions down the cheapest available network instead of defaulting to the branded scheme. On interchange-based pricing the saving can be significant; on a flat-rate plan it may already be baked into your rate. Ask your provider how it applies and confirm it is switched on.

Do I pay GST on merchant fees? It depends on the provider and the fee. Some merchant service fees are input-taxed with no GST, while hardware and some subscriptions do include GST. Use the tax invoices your provider issues and confirm coding with your accountant.

Do I need to worry about PCI compliance? You have obligations, but all three providers keep card data out of your systems, reducing your compliance scope dramatically. Provider-supplied terminals and hosted online checkouts usually put you in the simplest self-assessment category. Building your own card form is what makes it expensive.

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This article is general information only. It does not take into account your business's particular circumstances and is not financial, tax, accounting or legal advice. Pricing, features, settlement timing and regulatory requirements described here are indicative at the time of writing and change frequently — always confirm current details directly with each provider, and check the Reserve Bank of Australia and ACCC for current guidance on surcharging and card payments. Consider seeking advice from a licensed professional before making decisions about payment providers, surcharging or your business finances.