Multi-Location Inventory for Shopify: Setup, Transfers & Allocation

As an ecommerce brand grows beyond a single storage space, inventory management complexity increases exponentially. A single location is straightforward: you have X units, you sell Y per week, you reorder when stock gets low. Two locations double the tracking burden, but more importantly, they introduce a new category of problems: transfer management, allocation decisions, and the risk of inventory being "in transit" between locations where it cannot be sold.

Most Shopify brands expand to multiple locations for practical reasons: the main warehouse is full, Amazon FBA requires stock at their fulfilment centres, a retail pop-up needs dedicated inventory, or returns need to be processed separately from sellable stock. Each reason is valid, but each location you add reduces your visibility into total inventory unless your systems are set up to provide a unified view.

The technical setup in Shopify is straightforward. Go to Settings > Locations and add each physical location with its name, address, and fulfilment capability. You can designate locations as fulfilment locations (they can ship orders), non-fulfilment locations (they hold stock but do not ship, useful for overflow storage or incoming goods staging areas), or apps (third-party fulfilment services like Amazon FBA or ShipBob).

For each product, you then set stock levels per location. By default, Shopify shows total stock across all locations to customers. Fulfilment priority determines which location ships an order, Shopify can be set to fulfil from the closest location, the location with the most stock, or a fixed priority order.

The setup itself is quick. The ongoing management is where the complexity lives. For the wider picture, see what Shopify's built-in inventory tools miss.

Here is an example of 5 Shopify locations, each serving a specific function:

Location 1: Main Warehouse: Primary storage and fulfilment location. Holds most of the total inventory. All Shopify orders fulfil from here by default. This is the location with pick-and-pack stations, packing materials, and courier collection.

Location 2: Overflow Storage (separate unit): When a container shipment arrives and the main warehouse is full, excess stock goes here. This location is flagged as non-fulfilment, so stock must be transferred to the main warehouse before it can ship.

Location 3: Amazon FBA: Stock sent to Amazon's fulfilment centres for Prime-eligible listings. Stock levels are managed via Amazon Seller Central but tracked in Shopify to maintain a unified view.

Location 4: Retail Pop-Up: Used during seasonal pop-up events (Christmas markets, dog shows). Stock is transferred from the main warehouse before events and returned afterwards.

Location 5: Returns Processing: A dedicated location for returned items awaiting inspection. Items here are not available for sale until inspected and either returned to sellable stock (transferred to Location 1) or written off as damaged. This separation prevents returned items from accidentally being fulfilled before quality checking.

Transfers between locations are the most operationally tricky aspect of multi-location inventory. When you transfer 200 units from overflow storage to the main warehouse, those units are technically "in transit", they have left one location but have not arrived at another. During this window, Shopify reduces stock at the origin and has not yet added it to the destination. This is correct accounting, but it means your total available-to-sell stock drops temporarily. For a 30-second walk between adjacent warehouse units, this is trivial. For a transfer to Amazon FBA that takes 5-7 days, those units are unsellable for a week. If you have low stock on a fast-moving SKU and initiate a transfer to FBA, you might stockout on your Shopify store while the transfer is in transit. The solution is to plan transfers during high-stock periods and to treat "in transit" inventory as a separate category in your weeks cover calculations.

Allocation is the decision of how to distribute incoming stock across your locations. When a container of 3,500 units arrives, how many go to the main warehouse, how many to Amazon FBA, and how many to overflow storage?

The optimal allocation depends on two factors: channel demand ratio and storage capacity. If 80% of your sales come from Shopify direct and 20% from Amazon, a starting allocation is 80/20. But you need to adjust for lead time differences, restocking FBA takes 5-7 days (transfer time) while restocking your own warehouse is immediate (it is already there). So you might allocate 25% to FBA to provide a buffer for the slower replenishment cycle.

A formulaic approach works well: calculate the next 12 weeks of projected demand per channel, allocate stock to each channel to meet that demand plus 3 weeks safety stock, and put the remainder in overflow storage. This formula is recalculated every time a shipment arrives.

Total weeks cover across all locations is useful but insufficient. You need to know weeks cover per location per SKU to prevent location-specific stockouts. If your total stock is healthy at 10 weeks cover but 95% of it is in overflow storage and your main warehouse is at 1 week cover, you will stockout on Shopify orders within days. A SKU can look healthy overall but be critically low at a specific location, and that is what should trigger a transfer rather than a purchase order. Knowing whether to transfer or to reorder is one of the most valuable insights per-location weeks cover gives you. Canopy Inventory does not work out weeks of cover per location or suggest transfers: it shows weeks of cover per SKU and what to reorder from your suppliers.