Summary
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The US Postal Service will add a 6% temporary peak surcharge for the 2026 holiday season, effective Oct 4 through Jan 17, 2027, pending regulatory approval, covering Priority Mail, Ground Advantage and Parcel Select. Retail increases start at $0.50 and reach $20.80 per piece; commercial at $0.40 to $18.20. Combined with FedEx and UPS demand surcharges, fourth-quarter last-mile costs are set to rise across the board.