Inventory management in ecommerce

The key facts

• The store knows sales; the record knows stock. Ecommerce inventory management is the live record every channel draws from and reports back to.
• The defining failure: overselling — two channels selling one unit because their records synced late.
• What the system covers: live multi-location quantities, channel imports, pick and pack, purchase orders from demand, invoicing and the accounting handoff.
• BSimple's plug-in point: Shopify orders import by webhook into the standard flow; the record holds every channel; invoicing stays between store and accounting.
• Where it fits: this page is one branch of the inventory management guide.

Why ecommerce needs a record, not a store setting

A single-channel store with one person shipping from one room can run on the platform's built-in stock field, and honesty requires saying so. The need for a system arrives with the second thing that consumes stock: a second store, a marketplace, wholesale buyers ordering by email, a market stall, a physical shelf. From that moment, two records negotiate by sync — and every sync window is a chance for two customers to buy the same unit.

An inventory management system in ecommerce is therefore defined by what it is behind the store: one live record of quantities across all locations and channels, deducting at the moment each channel commits a sale, replenishing through purchase orders raised from demand, and feeding the pick-pack-ship operation that the store only ever sees as a status change. The store is a well-fed channel; the record is the system.

What the system does, day to day

• Imports channel orders into one flow: in BSimple's case Shopify by webhook — delivery slips, picking and packing, approval, stock deduction, all on the record the next buyer's availability check reads.
• Keeps quantities true across locations — warehouse, back room, fleet, consignment — so "in stock" is a fact, not an average.
• Raises purchasing from demand — reorder levels trigger supplier orders; goods receipts update the record before the stock is promised again.
• Handles the B2B side — wholesale buyers order through their own portal with their own pricing, on the same record as the store.
• Closes into the books — approved invoices push to Xero or MYOB with payment status mirroring back; US accounting integrations are rolling out.

We build BSimple, so weigh that: this list is the product, from $180/month AUD with everything in the core plans. It is not a storefront and takes no consumer orders itself — whether Shopify can manage inventory alone covers the boundary honestly, selling on eBay and marketplaces the multi-channel angle, and the order management path the flow the imports feed.

Choosing the system by the failure you fear

• You fear overselling: prioritise immediate per-channel deduction from one record over every other feature; a nightly sync does not count.
• You fear dead stock: prioritise live sell-through visibility and demand-driven purchasing — the ordering loop in full.
• You fear the books: prioritise the accounting handoff — invoices that arrive reviewed, GST handled, with no month-end reconstruction.
• You fear all three eventually: that is the normal condition of a growing ecommerce business, and the trial prices the cure in an afternoon — your products, your store, one real order through the whole path. The free-stage view covers the stay-free-longer option honestly.