Per-Customer Quantity Limits
Limit Total Units Per Customer
While per-customer order limits restrict how many orders someone can place, quantity limits restrict how many total units they can buy. This is useful when you want to allow multiple small orders but cap the overall volume.
How to Set Up
- Go to Customer Limits and tick Enable per-customer limits under Settings
- Under Limit Rules, click + Add Rule
- Set Limit Type to Total Quantity (units)
- Choose the Scope: Storewide (all products), Specific Product, or Specific Collection
- Set the Max Count and the Period
- Click Save in the save bar
Example: Total Units Per Month
Rule: Max 10 units of any product per customer per month
Target: All customers
Order 1: Customer buys 6 units -- OK (6/10 used)
Order 2: Customer tries to buy 5 units -- Blocked (would exceed 10)
Order 2 (revised): Customer buys 4 units -- OK (10/10 used)
No more units this month.
Product-Specific Quantity Limits
You can restrict quantities for a specific product across all of a customer's orders:
Product: Limited Edition Print
Max: 3 units per customer (lifetime)
Order 1: Customer buys 2 prints -- OK (2/3 used)
Order 2: Customer tries to buy 2 more -- Blocked (would exceed 3)
Order 2 (revised): Customer buys 1 print -- OK (3/3 used)
No more prints ever for this customer.
Collection-Scoped Quantity Limits
A quantity limit can also target a collection, capping the units a customer buys across every product in it β not just one product at a time.
Rule: Max 3 units per customer per month
Scope: Collection "Fragrances"
Order 1: 2 units of Eau de Parfum A -- OK (2/3 used)
Order 2: 2 units of Eau de Parfum B -- Blocked (different product, same collection)
Order 2 (revised): 1 unit -- OK (3/3 used)
This is the rule to use for allocation categories, regulated groups, and fair-share drops, where a per-product cap would let a customer take three of every item in the range.
Which scope to use
| Scope | What it counts | Use it for |
|---|---|---|
| All products | Every unit the customer buys, storewide | Overall volume control |
| Single product | Units of one product across all their orders | Limited editions, collectibles |
| Collection | Units across every product in the collection | Allocation categories, regulated groups, fair-share drops |
A per-product cap lets a customer take the maximum of every item in a range; a collection cap is what stops that.
Combining Order Limits and Quantity Limits
Both types work together. A customer might be allowed 2 orders per week but only 5 total units per week. If either limit is hit, the order is blocked.
Order limit: 2 orders per week
Quantity limit: 5 units per week
Order 1: 3 units -- OK (1/2 orders, 3/5 units)
Order 2: 3 units -- Blocked (would exceed 5 unit limit, even though order count is OK)
Order 2 (revised): 2 units -- OK (2/2 orders, 5/5 units)
What Customers See
On product pages (logged in):
- "2 units remaining this week for you (limit 3)"
- "You have reached your weekly limit for this product"
At checkout:
"You can only add 1 more unit of Limited Edition Print (limit: 3 per lifetime, already used: 2)."
Tips
- Lifetime limits are great for limited releases and collectibles
- Use monthly limits for subscription-style products where you want to control demand
- Customer limits require login -- guest checkout is blocked while they are on, so tell shoppers up front that an account is needed