2026 Peak Season Shipping Guide

The first announced 2026 peak-season charge begins September 21, when FedEx's U.S. international non-standard-package Demand Surcharges take effect. UPS domestic and seasonal international charges begin September 27, FedEx domestic non-standard-package charges begin September 28, and USPS temporary pricing begins October 4, pending favorable PRC review.

UPS applies its highest announced domestic and international non-standard-package peak rates from November 22 through December 26, 2026. FedEx applies its highest announced domestic demand rates from November 23 through December 27. USPS uses one temporary rate across its full filed October 4–January 17 window.

A peaking factor compares qualifying weekly shipment volume with a carrier-defined baseline. For qualifying high-volume UPS and FedEx shippers, that comparison determines the surcharge tier applied to eligible volume. The calculation is carrier- and service-specific and may include an assessment lag, so a strong promotional week can change costs after the activity that triggered the tier has already occurred.

Not automatically. A transportation, residential or accessorial discount may not apply to the corresponding demand surcharge. The agreement must be reviewed charge by charge for specific discounts, waivers, caps, exclusions, effective periods and conditions.

Depending on the shipper's agreement, volume, service mix, carrier alternatives and negotiating leverage, discounts or waivers may be available. The strongest request identifies the charges creating the greatest net exposure and supports the ask with package-level data and a credible business case.

Packages that trigger Additional Handling, Oversize or Large Package, Unauthorized or Over Maximum charges can create the greatest per-piece exposure. During the 2026 central holiday peak, the announced demand add-on reaches $595 for a FedEx Ground Unauthorized Package and $590 for a UPS Over Maximum package, before the corresponding underlying charge, transportation, fuel and other applicable fees.

Yes. FedEx's announced U.S. international non-standard-package Demand Surcharges begin September 21 and continue through February 7, 2027. UPS combines international non-standard-package fees with seasonal per-package and per-pound charges and ongoing lane-based Surge Fees. International models should account for origin, destination, direction, service and billable weight.

USPS lowered its dimensional-weight divisor from 166 to 139 and now rounds fractional package dimensions up. Those changes can increase billable weight for lightweight but bulky packages. A higher billed weight may also move a shipment into a more expensive temporary peak-pricing band.

Marketing and ecommerce teams can use the peak cost curve to evaluate promotion timing, delivery incentives, order cutoffs and alternative fulfillment options. The objective is to move eligible demand or change fulfillment economics without sacrificing profitable sales or the customer experience.

The analysis generally requires package-level shipment history, detailed invoices, the current carrier agreement and amendments, a weekly 2026 forecast, and SKU or packaging data for recurring non-standard or dimensionally rated shipments. International models also require origin, destination, direction, service and billable weight.

LJM can re-rate historical domestic and international shipments under the 2026 carrier rules, apply existing incentives and exclusions, identify the services, weeks and package characteristics driving cost, model peaking-factor exposure, and flag negotiation targets and operational changes that may reduce peak-season spend.