Fluxx Tech
A shop with both a counter and an online store often runs two separate systems. Stock sold at the counter still shows as available online. Online orders are typed into the billing software by hand. Prices differ between the two. Customers notice.
POS integration connects your point-of-sale system with your website, app or other software, so data flows between them.
What usually gets synced
Data | Typical direction | Why |
Products and prices | POS → website | One source of truth for the catalogue |
Stock quantity | Both ways | Prevents overselling |
Online orders | Website → POS | Billing and accounting in one place |
Counter sales | POS → website | Accurate stock online |
Customers | Both ways | Unified purchase history and loyalty |
Offers and discounts | POS → website | Consistent pricing |
Why it matters
• No overselling. Selling the last item online after it was sold at the counter leads to refunds and bad reviews.
• No double entry. Online orders appear in your billing system automatically.
• Accurate reports. Counter and online sales in one view.
• Unified loyalty. Customers earn and redeem points wherever they buy.
• Faster dispatch. Orders flow straight to the packing team.
Sync methods
Method | How it works | Notes |
API integration | Systems talk directly | Best, if your POS offers an API |
Middleware | A service sits between POS and website | Useful for older POS software |
Scheduled file sync | CSV or XML exchanged on a schedule | Simple, but not real-time |
Manual export/import | Periodic uploads | Only for very low volumes |
Confirm early whether your POS has an API or at least a scheduled export. Some older local POS systems have neither, which changes the approach.
Common pitfalls
• Product codes that don’t match. Clean your item master first; mismatched SKUs break every sync.
• Units and variants. Sizes, colours and pack sizes must map correctly.
• GST and pricing rules. Online MRP vs counter discounts need a clear rule.
• Stock buffers. Many shops keep a small buffer online to avoid overselling during sync gaps.
• Failure handling. If a sync fails, someone must be alerted, with a retry queue.
• Returns. Online returns need to flow back into stock correctly.
Before you start
• ☐ POS name, version and whether it has an API
• ☐ Which data must sync and in which direction
• ☐ Real-time or every few minutes
• ☐ Who owns the product master
• ☐ How discounts and offers are handled on each channel
• ☐ Who monitors sync failures
Frequently asked questions
Can any POS be integrated? Most modern cloud POS systems can. Older offline systems may need middleware or a scheduled export.
Will stock be perfectly accurate? Near real-time with a small buffer is realistic. Perfect accuracy during high-volume hours is hard.
Can one system replace both? Yes. Some businesses move to a single platform handling counter and online instead of integrating two.
