Three cost changes hit online stores inside a two-week window this July, and none of them sent you a warning email. Shopify Scripts stopped running on June 30. The EU’s duty-free window for small parcels closed on July 1. USPS repriced Ground Advantage on July 12. If you sell physical goods, at least one of these is already showing up in your numbers.
Here is what each change actually does, and what to check this week.
Shopify Scripts went dark, and the failure is silent
Shopify’s own developer documentation carries a deprecation notice that leaves no room for interpretation: “Shopify Scripts will be sunset on June 30, 2026. All existing Shopify Scripts will stop functioning after this date.”
That matters more than a normal deprecation because of how it fails. A broken app throws an error. A dead Script does not. Your checkout simply reverts to Shopify’s native behaviour. Custom tiered discounts stop applying. Payment method filtering stops filtering. Shipping rules you wrote three years ago and forgot about stop running. The checkout still loads, still takes cards, still books orders. It just prices them differently than you intended.
Shopify’s migration guide maps each Script type to its replacement API: line item Scripts move to the Discounts API, Cart Transform API, or Cart and Checkout Validation API depending on what they did; shipping Scripts move to the Delivery Customization API; payment Scripts move to the Payment Customization API. The guide also notes a limitation worth knowing before you plan: only stores on a Shopify Plus plan can use custom apps containing Shopify Function APIs, though any plan can install public apps from the App Store that contain Functions.
What to do: open Apps > Script Editor in your admin and list what was published there. If the list is empty, you are fine. If it is not, compare a handful of recent orders against orders from June. Look specifically at discount lines, shipping charges, and which payment methods appeared. Anything that changed on July 1 without you touching it is a dead Script.
The EU’s €150 duty-free window closed on July 1
For years, parcels under €150 entered the EU without customs duty. That ended. The European Commission announced on November 13, 2025 that EU Member States had reached political agreement in Council to remove the €150 customs duty relief threshold, and that the Commission and Council would “work on a temporary solution to collect the custom duties on e-commerce packages as early as possible in 2026” ahead of the EU Customs Data Hub in mid-2028.
The interim solution is a flat charge rather than product-by-product tariff classification. Tax compliance firm Avalara reports that low-value consignments now carry a temporary flat €3 customs duty per item, expected to run until July 1, 2028, when normal duties based on each product’s classification take over. Avalara also notes the charge falls on the business side, the seller, importer, or their representative, not collected from the consumer at the door.
Scale matters here. Avalara, citing European Commission data, puts 2024 low-value inbound consignment volume at roughly 4.6 billion parcels, about 12 million a day. A flat €3 on a €22 order is a real hit to contribution margin, and it lands on you rather than the buyer.
There is a second shoe. The Commission’s own announcement references a Council mandate from June 2025 to collect an e-commerce handling fee starting November 2026. Plan for that now, not in October.
What to do: if you ship to EU consumers, pull your average order value for EU orders and subtract €3 per item from the margin. If that number goes negative on your entry-level SKUs, you have a pricing or bundling decision to make, not a shipping decision. Raising minimum order value for EU customers is usually cleaner than raising prices across the board, because the duty is per item.
USPS Ground Advantage repriced on July 12
The Postal Service filed notice with the Postal Regulatory Commission on May 11, 2026, with changes effective July 12. Two items in that filing matter most to small parcel shippers. USPS confirmed the “elimination of ounce-based rate differentiation for published Commercial USPS Ground Advantage prices,” and said it would “align the divisor for dimensional weight pieces to industry standards” across Priority Mail Express, Priority Mail, Ground Advantage, and Parcel Select.
USPS did not publish a headline percentage. Shipping consultancy TransImpact calculated the change at an average 11.8% increase for Ground Advantage Commercial rates, with the sub-one-pound tiers absorbing the sharpest impact because the cheap 4 oz and 8 oz brackets were folded into the higher band. Treat that figure as a third-party analysis rather than an official USPS number, and verify against your own rate card.
The dimensional divisor change is the one people miss. A lower divisor produces a higher billable weight for the same box. If you ship light items in generous packaging, you are now paying for air at a worse exchange rate. One important caveat from the USPS filing: the ounce-tier change applies to published Commercial prices and does not affect customers on negotiated Ground Advantage rates.
What to do: reprice your three highest-volume SKUs using current rates and your actual box dimensions. If any of them shipped under 8 oz, they took the biggest jump. Shrinking a box by an inch is often worth more than renegotiating a carrier contract, and you can do it this afternoon. While you are looking at unit economics, it is worth reviewing your payment processing fees in the same pass, since the two costs usually get audited years apart when they should be reviewed together.
The pattern worth noticing
None of these three changes announced themselves in your dashboard. Scripts failed by doing nothing. The EU duty applies at the border, not at checkout. The USPS increase shows up as a slightly larger number on a label you buy fifty times a day.
That is the actual lesson. Platform and regulatory changes rarely produce an error message. They produce a slightly worse margin that you notice a quarter later, when it is baked into your baseline and hard to trace. The stores that stay profitable are the ones that put a recurring calendar block on checkout logic, landed cost, and shipping rates, the same way they already do for inventory counts.
Two things are worth pairing with this audit. First, if your discount logic ran through Scripts, check whether it was doing quiet work you never accounted for, and read our guide on reducing cart abandonment without constant discounts before you rebuild it as-is. Second, if margin pressure is pushing you to reconsider where you sell, our breakdown of Amazon versus Shopify for a new brand covers the fee structures behind that decision.
Check the Script Editor first. It takes two minutes and it is the only one of the three that may already be quietly mispricing every order you take.
Sources
- Shopify Developer Documentation, “Migrating from Shopify Scripts to Shopify Functions” (deprecation notice and Function API mapping) — shopify.dev
- European Commission, Directorate-General for Taxation and Customs Union, “E-commerce: 150 EUR customs duty exemption threshold to be removed as of 2026,” November 13, 2025 — taxation-customs.ec.europa.eu
- Avalara, “EU €150 customs duty exemption ended July 2026: What to know” (flat €3 interim duty, consignment volume, who pays) — avalara.com
- U.S. Postal Service Newsroom, “U.S. Postal Service Recommends Competitive Price Changes for July 2026,” May 11, 2026 — about.usps.com
- TransImpact, “USPS to Increase Ground Advantage Commercial Rates by 11.8%” (vendor analysis of the July 12 rate change) — transimpact.com
Last reviewed: July 31, 2026
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