EFTPOS vs online payments — keeping both in sync

A business with a physical till and a website is not running one payment system with two entry points — it is running two separate systems that happen to share a product catalogue and a bank account. EFTPOS and an online payment gateway are different pieces of infrastructure, with different providers, different fees and different settlement timing, and the practical work is keeping what they each report to you in sync rather than assuming they naturally are. A contactless debit or credit card tap at the EFTPOS terminal and a card number typed into an online checkout are, from the customer’s side, both “using their card” — but they are processed through entirely separate rails behind the scenes.

EFTPOS versus online payments: the two systems, compared

	EFTPOS (in-store)	Online payment gateway
What it processes	Card-present transactions at a physical terminal	Card-not-present transactions typed or tapped online
Typical fee structure	Often a flat monthly terminal rental plus a per-transaction rate	Usually percentage-plus-fixed-fee per transaction, no terminal
Settlement	Often same or next business day	Typically one to a few business days
Fraud risk profile	Lower — the card is physically present	Higher — card-not-present transactions carry more fraud liability for the merchant
Point of sale integration	Connected to your till or POS system	Connected to your website’s checkout

Where the real work sits: not the payments, the stock

The payment side of running both channels is largely independent — customers pay through whichever channel they’re in, and the two systems rarely need to talk to each other directly for the payment itself. The genuine risk is stock: if a product exists as one physical unit and it sells in the shop at 2pm, but your website still shows it as available at 3pm because the two systems don’t share real-time stock data, you can sell the same item twice. Resolving that is a stock synchronisation problem, not a payments problem, and it is covered in depth on managing stock and inventory online.

What a point-of-sale and ecommerce integration actually buys you

Some point-of-sale systems integrate directly with major ecommerce platforms, syncing stock levels and sales data between the till and the website automatically. This removes the manual reconciliation burden but is a genuine technical integration project, not a checkbox — ask specifically whether your existing POS system has a supported, maintained integration with the ecommerce platform you’re considering, rather than assuming any two systems will connect.

What happens without an integration

Many small businesses run the two channels with no automatic connection at all, reconciling stock manually — checking physical stock counts against the website’s listed quantities at set intervals, and adjusting manually when a discrepancy is found. This is workable at low volume and low product-count, and becomes progressively more error-prone and time-consuming as either grows. It is a reasonable starting point, not a permanent solution, for a business just beginning to sell both ways.

The financial reconciliation side: EFTPOS and gateway fees

Beyond stock, keep the financial records from both channels reconciled against your accounting system — most accounting software supports feeds from both EFTPOS providers and major ecommerce platforms, but check specifically that both connect cleanly rather than assuming it. Because the EFTPOS terminal fee and the online gateway’s transaction fee are genuinely different cost structures, and because rules around passing a card surcharge on to the customer are specific and change from time to time, confirm the current position with your payment provider and your accountant rather than assuming the same surcharge or fee treatment applies across both channels by default. GST is charged the same way regardless of channel, covered on GST and online selling, but reconciling two separate transaction feeds into one set of books is genuine bookkeeping work worth planning for rather than discovering at tax time.

What to ask a supplier building the online side

Ask directly whether the ecommerce platform being proposed has a supported integration with your existing point-of-sale system, and if not, what the manual reconciliation process will look like. A supplier building only the website has no visibility into your in-store system unless you tell them it exists and ask them to account for it.

Why refund processes also need to be reconciled across both channels

A customer who bought in-store but wants a refund processed to their card while the business’s records show the sale differently across the two systems is a common source of bookkeeping error in dual-channel businesses. Decide and document, before this situation arises, how a cross-channel refund is actually processed — through which system, recorded against which sale — rather than improvising it the first time a customer asks.

Loyalty and gift card programs across two channels

A loyalty program or gift card that works in-store but not online, or vice versa, is a common gap in dual-channel retail that frustrates customers who reasonably expect a single, consistent account of their relationship with the business regardless of channel. If a loyalty or gift card program matters to your business, confirm specifically whether your chosen combination of POS and ecommerce platform supports it across both channels, since this is a genuine integration question, not an assumption to make by default.

The staff training dimension often overlooked in a dual-channel setup

Staff serving customers in person need to understand how the online store affects what they’re seeing on the till — a sale ringing up in-store needs to correctly and promptly reduce the online stock count, and staff need a clear process for what to do if a customer asks about an online order while in the physical shop. This is a training and process question as much as a technical one, and it’s worth planning explicitly rather than assuming staff will work it out as issues arise.

What to do next

Map out, before building anything, how stock will be kept in sync between your till and your website — automated integration or manual reconciliation — because this decision affects platform choice more than almost any other single factor if you already sell in person.

Selling in both channels is exactly the situation ecommerce website design in Australia should be scoped around from the outset, not retrofitted once the online side is already live.