How MOQ Manager works
Enforce minimum order quantities, maximums, and order multiples at Shopify checkout, natively, with Shopify Functions. Try the interactive rule tester.
What is MOQ Manager?#
MOQ Manager enforces quantity rules (minimums, maximums, and order multiples) on your Shopify store. Rules are checked by a Shopify Function running inside checkout itself, so they can't be bypassed by theme quirks, direct cart links, or clever customers. It's built for wholesale, print, and any business where a 1-unit order loses money.
Try a rule right now#
Configure a rule, break it, fix it. This is exactly how enforcement behaves at checkout, error messages included.
Test a quantity rule
Product page badge preview
Minimum order: 6 units · Maximum order: 24 units
Your cart
Counted toward the rule: 4
⚠ Minimum order quantity for "Ceramic Mug" is 6. You have 4.
Enforced by a Shopify Function inside checkout, no storefront workarounds.
The three constraint types#
| Constraint | What it enforces | Typical use |
|---|---|---|
| Minimum quantity | At least N units | Wholesale minimums, print run floors |
| Maximum quantity | At most N units | Limited editions, stock protection |
| Order multiples (step) | Exact multiples of N | Packs, pairs, cases, with no partial packs |
Use one, two, or all three on the same rule; details in Quantity Constraints.
The three rule scopes#
- Product rules: the minimum applies to all variants of a product combined
- Variant rules: only one specific variant counts
- Collection rules: cover a whole collection in one rule
How they combine and aggregate is covered in Rule Types.
Why enforcement at checkout matters#
Most quantity apps only nudge: a widget on the product page that a customer can scroll past, or JavaScript that breaks with the next theme update. MOQ Manager registers a Cart Validation Function with Shopify: every checkout, from any entry point, is validated inside Shopify's own infrastructure. If the cart violates a rule, checkout is blocked with a clear message (which you can customise).
The optional storefront widget adds friendly early warnings on product and cart pages, but checkout enforcement is always the authoritative check, widget or not.
Where to next?#
- Getting Started: install, activate, first rule in five minutes
- Checkout Enforcement & Messages: customise the error copy
- Plans & Billing: free for rules covering up to 3 products; paid plans from $5/month with 14-day trials
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