There is no native feature in Odoo eCommerce to enforce a different minimum order quantity for each product variant. The closest standard options are using Pricelist rules with a minimum quantity, which affects pricing but does not prevent customers from ordering lower quantities, or Product Packaging, where variants can be sold in predefined pack sizes. However, packaging is not a strict quantity restriction and customers may still be able to adjust quantities. If you need true per-variant minimum order quantities (e.g., Variant X can be ordered from 1 unit, Variant Y must be ordered in quantities of 3 or more), a customization is required.

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There is no native per-variant minimum order quantity in Odoo's standard eCommerce module. Here are the available workarounds:

Option 1: Use Sales Order minimum quantity on pricelist rules

Go to Website → Configuration → Pricelists, create pricelist rules with minimum quantities per variant. This affects pricing but not hard enforcement of minimum qty.

Option 2: Set minimum quantity on product variants via Pricelists (partial)

In Odoo 17/18, pricelists support quantity break pricing per variant, but this is a pricing control, not a quantity enforcement.

Option 3: Workaround using product packaging

Go to the product → Inventory tab → Product Packagings. Set packaging sizes per variant (e.g., variant X = 1 unit pack, variant Y = 3 unit pack). This nudges customers toward ordering in the right quantities, but doesn't hard-block other quantities.

Option 4: Use a separate product per variant

If variants need completely different minimum quantities (e.g., service packs of 4h vs 25h), consider creating them as separate products rather than variants. Each product can have its own minimum order quantity logic.

For hard per-variant minimum qty enforcement on the webshop:

This requires a custom module that adds a "Minimum Qty" field to product.product and enforces it in the website cart controller.

We can provide this custom module for free — contact custom@trewac.com.