A store-wide order minimum that exempts store-credit customers

The merchant’s ask sounded simple: a $5 minimum order across the whole store — but customers spending store credit should be exempt. Someone redeeming a small credit balance should not be blocked by a minimum meant for everyone else.

Where Shopify stopped short

A store-wide minimum is exactly what Shopify’s cart and checkout validation function is for, and the first half was straightforward.

The problem was the exemption. The validation function has no visibility of a customer’s store-credit balance — that value simply is not in scope for it. So the function could enforce the minimum, but it could not tell who to let through.

There was a second wall too. Store credit is not something Shopify Flow can trigger on directly either — you cannot start a Flow from “customer has store credit.”

Bridging it with a tag

Both gaps had the same shape: the platform can’t see store credit there, but it can see it somewhere else. So we used a customer tag as the bridge between the two.

• A customer segment does what Flow and the function can’t — it can filter customers by store-credit balance. So we defined a segment of “customers with store credit.”
• Two Shopify Flows keep a tag in sync with that segment: one adds the tag when a customer enters the segment, the other removes it when they leave (their credit is used up).
• The validation function reads the tag. It can’t see store credit, but it can see tags — so it enforces the $5 minimum for everyone except customers carrying the store-credit tag.

The result

Customers spending store credit sail through; everyone else meets the $5 minimum — and it all stays current on its own, because the Flows keep the tag in step with each customer’s balance. Two Shopify limitations, joined by a single tag into one clean rule that needs no manual upkeep.