The belief that checkout quantity rules require Shopify Plus is outdated. Since Shopify introduced Shopify Functions — available on all plans — third-party apps can enforce quantity logic at the checkout level on Basic, Shopify, and Advanced plans.
What Shopify Plus Is Actually Required For
- Custom checkout UI layout (branding, custom fields, upsell widgets)
- Draft order based B2B checkout flows
- Access to Checkout Branding API for full visual customisation
What Is Possible on Standard Plans via Shopify Functions
Shopify Functions run server-side at Shopify’s checkout infrastructure. They do not require Plus. Apps built on Functions can enforce:
- Minimum order quantities — block checkout below a floor
- Maximum order quantities — prevent bulk buying
- Quantity increments — enforce case packs and multiples
- Per-customer limits — track purchase history and cap repeat buys
- Customer-tag-based rules — different rules for retail vs wholesale
Fold: Functions-Based Quantity Rules on All Plans
Fold brings all of the above to a no-code interface. Install from the Shopify App Store. No theme edits. No Plus required.
How Fold uses Shopify Functions
When a customer clicks checkout, Shopify calls the Fold Function in milliseconds. The Function checks active rules against the cart and either allows the purchase or blocks it with your custom error message. The customer never leaves the checkout — they just see the error and correct their cart.
Comparing App-Based Rules vs Native Shopify B2B
Shopify Plus includes native B2B quantity rules via catalogs and price lists. These are powerful for large wholesale operations. For merchants on standard plans who need quantity enforcement — minimums, maximums, increments, per-customer limits — Fold provides the same checkout-level enforcement without the Plus subscription cost.
Frequently Asked Questions
Do Functions apps slow down checkout?
No. Shopify Functions execute at Shopify’s infrastructure level with sub-millisecond latency. There is no meaningful performance impact.
Can I stack multiple quantity rules?
Yes. All active Fold rules evaluate simultaneously. A product can have a minimum of 6, an increment of 6, and a per-customer lifetime limit of 24 — all enforced at the same checkout.
Install Fold for Shopify quantity rules on any plan — no Plus, no code, no developer.
