POS integration agencies

Where the friction is

• Inventory timing. Sync intervals of even a few minutes will oversell a fast-moving line. Buffers fix it and cost you sales. Which trade-off you want is a business decision, not a technical default.
• Product identity. Shops carry products that are not worth listing online and online carries variants the shop never stocks. Forcing one catalogue to serve both usually produces a worse version of each.
• Returns and exchanges. An online order returned in store is the single most common process gap, and it touches stock, payments and tax at once.
• Pricing. Shop and online prices diverge for good reasons — promotions, local competition, clearance. Systems that assume one price per product make that painful.

Questions worth asking

• Which system is the master for stock? There has to be one. If the answer is “both”, nothing else in the project will hold.
• What happens offline? Card networks and internet connections fail; a till that cannot sell during an outage is a serious operational problem.
• How are staff trained? The integration is only as good as the process followed at the counter on a Saturday.
• What about existing hardware? Card terminals are frequently tied to a specific gateway, and changing platform can mean replacing them.

What it costs

A single-location setup on mainstream POS hardware, with inventory sync and nothing unusual, is commonly $3,000–$10,000. Multi-location retail with transfers, per-store pricing and click-and-collect runs $15,000–$60,000. Where an existing till system has to stay, budget for middleware and for a discovery phase — the cost is driven almost entirely by what that system will and will not expose.