- Short answer
- No — Shopify B2B catalog quantity rules count each variant separately, even when set for all variants of a product; mixed variants don't add up.
- Where you set it
- In Markets > Catalogs, hover a product to cover all its variants, or open its variants link for one variant.
- Maximums and increments
- An optional maximum also applies per variant; 5 gray plus 5 blue hats aren't one increment of 10.
- At checkout
- Rules are re-validated, so buyers can only add and purchase quantities your rules allow.
- Volume price breaks
- A separate setting, also per variant; in the admin, each break must exceed the minimum and fit the increment.
Can buyers mix variants to meet a minimum or increment?
Shopify's help page says minimum and maximum rules “apply to product variants”. Its example is a hat in blue and gray, with a minimum of 10 on each:
Customers can’t combine 5 gray hats and 5 blue hats to meet the minimum of 10 hats.
Increments work the same way: for products boxed in multiples of 10, an increment of 10 means buyers purchase each variant 10, 20 or 30 at a time, and 5 gray plus 5 blue hats don't make one step.
Where do you set quantity rules, and what do buyers see?
In Markets > Catalogs, hover over a product to set rules for all its variants, or click the variants link under its name for a single variant. Either way, Shopify's Admin API defines each quantity rule for one product variant.
Rules apply to line items and are re-validated in checkout, so buyers can only add and purchase quantities your rules allow. Make sure your theme displays the minimum on the product page.
Volume price breaks, a separate setting, also count per variant: each variant must reach the break quantity, and when you add breaks in the admin, each must be greater than the minimum and a multiple of the increment. Our MOQ and quantity-breaks guide shows how to price around them.
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