Building a Blueprint or a Modifier Blueprint isn't enough on its own — for sales to actually deduct stock, it must be linked to the POS product that gets rung up at the till. This article covers how to make that connection.

The same linking mechanics apply to both Blueprints (base products like Latte, Burger, Gift Box) and Modifier Blueprints (modifiers like Oat Milk, Extra Shot, Premium Wrap). Both types have a POS Product field that connects them to a single product in your POS catalog.

Without the link: the Blueprint or Modifier Blueprint exists but does nothing when a sale happens. With the link: every sale of that POS product flows into Stash on the next 15-minute sync and triggers the appropriate deduction (or swap).

Only Admins can link Blueprints or Modifier Blueprints to POS products.

Open the Blueprint or Modifier Blueprint, click Edit, set the POS Product field, and save. You can also set this when first creating it — there's a POS Product picker right under the Location field.

Linked items show a green POS linked badge in their list. Unlinked ones show a muted Not linked badge if their shop has a POS connection but no link is set.

Modifiers come through your POS as their own line items on the order, so they need their own POS product link — the same as any other sellable item. The Modifier Blueprint then handles the deduction (and optional swap reversal) when that line is processed. See What is a Modifier Blueprint? for the full rationale.

Linking takes effect immediately for the next POS sale that the sync picks up. Sync runs every 15 minutes, so:

Past sales are not retroactively deducted. If sales of this POS product were synced and processed before the link was set, those sales were marked "skipped (no blueprint)" and won't be re-processed when you link later. Stash never goes back and applies a Blueprint or Modifier Blueprint to historical orders. Plan ahead: create and link before a busy day, not after.

For full sync mechanics, see How POS sales deduct stock automatically.

The link is one-to-one within a shop. Two Blueprints can't share the same POS product link in the same shop, and a single Blueprint can only link to one POS product. The same rule applies to Modifier Blueprints. (You can have a Blueprint with the same name and recipe at multiple shops — each one links to that shop's own POS product.)

If you sell the same finished product at multiple shops, you need:

If you sell items that don't need any deduction at all — say, a service charge, a tip product, a bag fee — leave them unlinked. Stash will simply skip those lines when the order syncs.

If you sell a simple item where one POS product = one inventory item (a pre-packaged bottle of water you stock as-is, a single t-shirt SKU), you still need a Blueprint with one component (1 of that item). Stash does not auto-match POS products to inventory items by name or SKU — the Blueprint link is always required.

You can re-link a POS product to a different Blueprint or Modifier Blueprint at any time. Past sales are not retroactively recalculated — only future sales use the new link.

The POS Product picker only shows products from POS connections at the same shop as the Blueprint or Modifier Blueprint. If your POS isn't connected for that shop, or the catalog hasn't been synced yet, the dropdown will be empty. Connect the POS first, run a catalog sync, then come back to link.

Check these in order:

See Why my Blueprint isn't deducting stock for the full diagnostic.