Minimum Purchase Rules: Qualify Before or After Other Discounts?

Short Answer

When a customer reaches a $100 threshold and then applies a coupon that brings the payable total to $90, someone has to decide which number counts. There are two defensible policies:

• Before other discounts: reward the basket the customer built. Good for perks whose cost does not grow with the order (a loyalty tier, a percentage that is already budgeted).
• After other discounts: reward what the customer actually pays. Good for benefits with a real per-order cost, such as shipping.

The harder part is knowing what your tools can actually measure. In Discount Prime there is no separate "before/after" setting: the basis is derived from each campaign's combination toggle, the mapping differs between Tiered Spend and Free Shipping, and neither campaign can see a Shopify discount code. This study walks through what that means for a real coupon dispute.

Scenario

Consider Summit Outdoor Supply, a fictional Shopify merchant selling hiking and camping gear. It runs a $100 free shipping threshold and a loyalty program that issues 25% off Shopify discount codes. Illustrative assumptions: average shipping cost $9, gross margin 45%.

Marketing argues the customer built a $120 basket and earned free shipping. Finance argues a $90 order should not carry a $9 subsidy. Both are describing a policy choice.

What each policy costs here

The cost of the "before" policy is the subsidy on orders that only qualified before the coupon. Multiply $9 by the number of such orders in a month to see what the policy is worth to you.

What Each Tool Can Measure

Native Shopify

Shopify applies product discounts first, then order discounts on the subtotal after product discounts, then shipping discounts (Shopify Help Center: combining discounts). Whether two discounts apply together depends on each discount's combination settings; when they cannot combine, Shopify applies the best discount for the customer. Test how a native minimum requirement behaves with your specific codes before you promise either policy.

Discount Prime Free Shipping

Important limit: Shopify runs each discount function without the results of other discounts, so the line totals the shipping function reads may not include a Shopify discount code or another campaign's checkout discount. Do not assume "after" will see the loyalty code. Test it with the exact code. Price changes made by Flat Product Discount or Bulk Price Update are different: they change the product's actual price, so both bases see the lower price.

Discount Prime Tiered Spend Discount (order level)

Note that the mapping is the reverse of Free Shipping: turning the toggle on means before here. "Other discounts" means Discount Prime's own product-level discounts calculated in the same checkout run, not Shopify discount codes. Tiered Spend also has no customer eligibility at checkout, so it cannot be limited to VIP customers, and it cannot be delivered by code.

List price at checkout

At checkout, free gift thresholds, Buy X Get Y minimum spend, and cross-sell trigger spend are measured at list price; they have no before/after option. Storefront widgets can read a different number: the free gift widget, for example, adds or removes the gift based on the cart total after line discounts, so a discounted cart can reach the gift later than checkout would allow. See the free gift progress bar case study for that edge case.

Worked Example: Tiered Spend Basis

Illustrative cart: two sleeping bags at $80 each, with a Discount Prime Tiered Quantity Discount of 15% for 2 or more ($24 off). Tiered Spend campaign: 10% off orders of $150 or more.

With the toggle on, the order percentage is calculated on the pre-discount subtotal, so the two campaigns together give 25% off list. If your margin plan assumed "15% plus 10% of what is left", you budgeted $37.60, not $40. If several Tiered Spend campaigns qualify at once, the function keeps the smallest order discount, not the largest.

Recommendation for Summit

1. Decide the policy per benefit. Shipping has a per-order cost, so finance's "payable value" view is reasonable for shipping. A spend-tier discount whose cost scales with the order can reasonably use the built basket.
2. For free shipping vs the loyalty code, Discount Prime's threshold alone cannot enforce "after the Shopify code". Choose one of:
   • Accept the "before" policy and budget for it: estimate how many orders fall below $100 after the code, times the average shipping cost.
   • In Shopify, edit the loyalty code's combination settings so it does not combine with shipping discounts. The customer then gets one or the other, and Shopify picks the better one for the customer. Test this in checkout, because the outcome depends on cart contents and both discounts' settings.
   • Raise the threshold so that typical coupon users still pay enough after the code to justify the subsidy.
3. For the Tiered Spend campaign, pick the toggle by intent, then run the worked example above with your own tiers to see the combined discount.
4. Say the rule to customers. If free shipping is measured before coupons, the bar and banner can say "on orders over $100 before discounts". If you choose the other policy, say "after discounts".

Pre-Launch Tests

Measurement

• Primary metric: shipping subsidy per order and the number of subsidized orders whose payable total was below the threshold.
• Guardrail: gross profit per order after discounts and shipping (Estimated Profit in Discount Prime analytics covers cost of goods, discounts, and shipping).
• Customer signal: support contacts about eligibility, and abandonment after a code is applied.
• Change the policy or threshold if below-threshold subsidies exceed what you budgeted, or if complaints concentrate on one rule the storefront does not explain.

Takeaway

"Before or after discounts" is a business policy, but it only works if the tool can see the discount in question. Decide the policy per benefit, check what each campaign actually measures (the combination toggle sets it, and Shopify codes are outside what Discount Prime's thresholds can see), and test the exact coupon before launch.