USPS holiday prices will apply from Oct. 4, 2026 until Jan. 17, 2027, adding $0.40 to $9.10 per Ground Advantage or Priority Mail label at commercial prices, on top of April's 8% increase. See the increases by weight and zone, retail vs. commercial prices, real label examples, and what to check before Oct. 4.
On July 12, 2026, USPS collapsed four sub-1-lb Ground Advantage price tiers into one — the top rate. To rural ZIP codes, a 4 oz package now costs the same as a 15.99 oz one. Here's the real math, who actually gets hit, whether FBA moved, and how to protect your margin.
Carriers and platforms quietly back-charge seller accounts after delivery — FedEx One Rate audits, UPS return adjustments, Amazon’s own FBA re-measurements, and the new USPS $50 hazmat fee. Here’s exactly where these charges hide on Amazon, eBay, and Walmart, and how to audit, dispute, and prevent them.
Starting July 12, 2026, USPS will charge a $50 noncompliance fee per package when hazardous materials are detected in a commercial shipment that was not properly declared at label creation. Here is what every e-commerce seller needs to know - and exactly what to do before the deadline.
