B2B and High-Value Order Payment Controls

Disable Shop Pay Installments for two customer segments: those tagged as B2B and those placing orders over $5,000. Show a disclosure message at checkout explaining why the option is unavailable. Automatically tag wholesale customers when they sign up through the B2B portal. Track B2B customer activity and high-value orders to verify the rules are working correctly.

A mid-market merchant running both DTC and B2B channels needed to disable Shop Pay Installments for wholesale customers and orders exceeding $5,000. Manual payment method management at checkout created friction, and there was no clear signal to buyers about why installment options were unavailable for certain purchase types.

Four pieces

Checkout

Installments Block Function

Disables Shop Pay Installments at checkout if the customer carries a B2B tag or if the cart total exceeds $5,000.

Shopify Function (Payment Customization)

Storefront

Checkout Disclosure Badge

Displays a notice at checkout when Shop Pay Installments is disabled, clarifying to B2B or high-value buyers why the option is unavailable.

Theme extension (Checkout UI)

theme/snippets/installment-disclosure.liquid liquid

{% if customer and customer.tags contains 'b2b' %}
  <div style="padding: 12px; margin: 12px 0; border-left: 3px solid #999; background: #f9f9f9; font-size: 13px; color: #666;">
    <strong>B2B Account:</strong> Installment payment options are not available for wholesale orders.
  </div>
{% elsif cart.total_price > 500000 %}
  <div style="padding: 12px; margin: 12px 0; border-left: 3px solid #999; background: #f9f9f9; font-size: 13px; color: #666;">
    <strong>Large Order:</strong> Installment payment options are not available for orders over $5,000.
  </div>
{% endif %}

Insert into checkout.liquid or payment methods section. Price is in cents (500000 = $5,000).

B2B / Wholesale

B2B Customer Tagger

Automatically tags new wholesale customers with 'b2b' when they sign up through the B2B portal or when manually marked by staff.

Shopify Flow

Shopify Flow editor: When → Then flow

Trigger: Customer created OR Customer updated (via B2B portal signup)
Condition: customer.note contains "wholesale" OR customer has metafield company_id (indicates B2B)
Action 1: Add tag "b2b" to customer
Action 2: Send confirmation email to merchant (optional: notify fulfillment that this is a wholesale order)

Adjust the condition to match how B2B customers are identified in the store (company ID, sales channel, note field, custom metafield).

Operations

Payment Rules Dashboard

A reference query listing all B2B-tagged customers and their recent order history, used to audit rule effectiveness and catch edge cases.

Admin dashboard (custom app or report export)

Admin GraphQL explorer graphql

# Admin GraphQL — fetch B2B customers and their order history
query B2BCustomerReport {
  customers(first: 50, query: "tag:b2b") {
    edges {
      node {
        id
        firstName
        lastName
        email
        tags
        orders(first: 3, sortKey: CREATED_AT, reverse: true) {
          edges {
            node {
              id
              name
              totalPriceSet {
                shopMoney {
                  amount
                }
              }
              createdAt
            }
          }
        }
      }
    }
  }
}

Run this to see all b2b-tagged customers and their last three orders; cross-check for any orders that should have been blocked.

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