Holiday Peak Season 2026: Supplier Readiness Checklist 

Holiday peak season 2026 presents a new set of challenges for retail suppliers, from shifting import patterns and updated retailer compliance requirements to higher transportation costs. For suppliers working with Target, Walmart, and other major retailers, preparation is essential to keeping shipments on schedule, avoiding costly compliance exceptions, and protecting margins as order volumes rise. 

In this article, we cover: 

• What’s changing for the 2026 holiday peak season, including import forecasts, retailer compliance updates, and shipping surcharges. 

• How Target’s updated SPM compliance requirements and Walmart’s Stride TMS affect supplier operations. 

• How to use a readiness checklist to validate item data, EDI transactions, and routing instructions while preparing for deductions. 

The biggest risks during this season will typically begin before product ever leaves the warehouse. Incorrect item data, inaccurate case packs, and missed routing changes can all create exceptions, and those exceptions multiply as holiday order volumes continue to climb. 

What’s Changing for Retail Suppliers During Holiday Peak Season 2026? 

Three developments are shaping this year’s holiday shipping season: Shifting import forecasts, updated retailer compliance requirements, and rising transportation costs.  

How Do Changing Import Forecasts Affect Holiday Inventory Planning? 

The National Retail Federation (NRF) and Hackett Associates projected that U.S. imports would reach 2.31 million twenty-foot equivalent units (TEUs) in September 2026, a 9.6% increase over the previous year. The revised forecast reflected an extended import peak driven partly by weather-related vessel delays and shifting shipping routes.  

For suppliers, these changes reinforce the importance of confirming inventory arrival dates, adjusting replenishment schedules, and preparing for potential distribution bottlenecks. 

Why Do Retailer Compliance Changes Matter During Peak Season? 

Retailer compliance requirements govern how suppliers prepare, document, route, and deliver shipments, and even minor discrepancies become expensive when repeated across hundreds of orders.  

Target Supplier Compliance: What Changed in 2026? 

Target’s updated SPM Compliance Policy took effect May 3, 2026, adding new accuracy metrics and revising existing requirements. The 2026 holiday season is the first Target suppliers will ship under the new policy. 

Target’s 2026 Supplier Compliance Requirements 

How Can Target Suppliers Reduce Compliance Deductions? 

Start with high-volume items and recurring discrepancies, since a single incorrect case pack configuration can affect multiple purchase orders (POs) and trigger repeated receiving exceptions. Compare physical case quantities with approved item records, verify barcodes and item attributes, confirm retailer operating calendars, and update internal deduction and denial code mappings. 

Receipt dates also factor into how Target measures compliance, so confirm which requirements apply when shipments reach the distribution center (DC), especially when deliveries cross reporting periods. Accurate advance ship notices (ASNs), shipment records, and delivery documentation make it easier to investigate discrepancies and support disputes.  

Related Reading: How Suppliers Can Keep up With a Changing Retail Network 

Walmart Collect: How to Prepare for Holiday Shipping in Stride TMS 

Suppliers using Stride TMS should watch assigned carrier pickup dates and routing changes closely during peak season. The carrier pickup date assigned through Walmart’s routing process may differ from the date displayed when a shipment was confirmed, so teams relying on outdated information may not have freight ready. 

Walmart Collect Holiday Routing Checklist 

Twice-daily routing reviews are a recommended operational practice, not a universal Walmart requirement.  

How Can Walmart Collect Suppliers Avoid Pickup Delays? 

Build a consistent process for reviewing routing information and communicating changes, so warehouse, transportation, and account management teams can work from the same confirmed pickup schedule. Documenting changes also helps identify where internal processes need improvement. 

How Will 2026 Holiday Shipping Surcharges Affect Supplier Costs? 

UPS, FedEx, and USPS have all announced seasonal pricing adjustments that may raise parcel shipping costs this holiday season.  

Actual costs depend on the carrier, service, shipment dimensions, volume, and contract terms. Before finalizing forecasts, it is important to confirm current schedules against your own contract terms, and check package dimensions for oversized and additional handling exposure. Comparing projected and actual transportation expenses weekly can surface unexpected increases before they significantly affect margins. 

2026 Holiday Peak Season Supplier Readiness Checklist 

A successful holiday season requires far more than sufficient inventory. Suppliers also need accurate item data, reliable electronic transactions, current routing instructions, and effective compliance monitoring.  

Use this checklist to assign responsibilities and confirm readiness: 

1. Validate Item Data, Case Packs, and Barcodes 

Responsible teams: Merchandising, item data, and operations 

• Confirm case pack quantities match approved item records and POs. 

• Validate item attributes for high-volume and seasonal products. 

• Test barcode accuracy and scannability on physical cases, and resolve recurring discrepancies before more orders ship. 

How to verify: Compare approved item records, POs, and physical inventory, then confirm that corrections are reflected in fulfillment systems. 

2. Review Retailer Calendars and Compliance Requirements 

Responsible teams: Retail operations and account management 

• Verify holiday closures, business calendars, and retailer-specific shipping and receiving instructions. 

• Confirm applicable 2026 compliance policy changes and share updates with warehouse and transportation teams. 

How to verify: Check current retailer portal information and document relevant changes. 

3. Audit EDI Transactions and Shipment Documentation 

Responsible teams: EDI, IT, and operations 

• Reconcile ASN quantities with actual shipments, and verify PO references and shipment identifiers. 

• Investigate failed or rejected electronic data interchange (EDI) transactions. 

• Test critical workflows that may be affected by system or retailer changes. 

How to verify: Reconcile a sample of recent POs, ASNs, and shipment records. 

4. Confirm Transportation and Carrier Readiness 

Responsible teams: Logistics and warehouse operations 

• Review current retailer routing instructions and assigned carrier pickup dates. 

• Evaluate transportation capacity and contingency plans. 

• Incorporate applicable peak surcharges into cost forecasts. 

How to verify: Compare routing records with warehouse schedules and carrier confirmations. 

5. Prepare for Retailer Deductions and Disputes 

Responsible teams: Finance, accounts receivable, and compliance 

• Review current deduction and denial codes, dispute deadlines, and submission procedures. 

• Establish recurring compliance report reviews and organize supporting shipment and delivery documentation. 

How to verify: Trace a recent deduction to its PO, shipment records, retailer documentation, and supporting evidence. 

6. Assign Ownership and Track Corrective Actions 

Responsible team: Supply chain leadership 

Every significant exception needs a clearly assigned owner, priority, and resolution deadline. A shared tracker with fields for the issue, owner, priority, due date, status, and supporting evidence keeps unresolved problems from moving between departments without accountability. 

How Can Suppliers Prevent Holiday Compliance Chargebacks? 

The most effective way to reduce preventable chargebacks is to correct underlying data and process errors before they affect additional shipments. 

Which Compliance Issues Should Suppliers Prioritize? 

It’s wise to first focus on the issues with the greatest operational or financial impact.  

For example: 

• High-volume items with inaccurate master data 

• Recurring ASN or PO discrepancies 

• Routing exceptions affecting scheduled pickups 

• Compliance deductions approaching dispute deadlines 

How Often Should Suppliers Monitor Holiday Shipping Exceptions? 

A defined review schedule helps teams catch problems before they spread across more transactions as order volume rises. 

How Should Suppliers Prepare for Post-Peak Deductions? 

Deductions may appear during holiday shipping or after shipments are reconciled. For Target suppliers, the referenced 2026 guidance generally provides a three-month dispute window from the chargeback date. Verify deadlines and procedures against current retailer documentation. 

To prepare, retain POs, ASNs, routing records, and delivery confirmations, and organize them by retailer and shipment. Review compliance reports before deductions accumulate, prioritize disputes by claim value, likelihood of recovery, effort, and deadline, and investigate recurring causes to prevent future exceptions. 

Related Reading: How to Systematically Dispute and Prevent Invalid Deductions from Major Retailers 

Frequently Asked Questions About Holiday Peak Season 2026 

What should retail suppliers check before holiday peak season 2026? 

Verify item data, case packs, retailer calendars, EDI transactions, routing instructions, transportation capacity, and deduction procedures, starting with high-volume products and recurring exceptions. 

When do holiday shipping surcharges apply in 2026? 

Dates vary by carrier and service. UPS scheduled certain additional handling and oversized charges to begin September 27, 2026, with broader peak charges starting October 25, 2026. Confirm all applicable schedules and agreements. 

How can suppliers reduce retailer chargebacks during peak season? 

Validate item records, improve ASN and EDI accuracy, follow retailer routing requirements, monitor compliance reports, and correct recurring errors before they affect more shipments. Consistent POs, shipment notices, and fulfillment records reduce receiving discrepancies when volume is high. 

Explore the 2026 Retailer Compliance Guides 

Every retailer sets its own requirements for item data, labeling, shipping, and compliance. 

Staying current with retailer requirements is essential to protecting revenue, preventing costly disruptions, and maintaining strong trading partner relationships.  

With the right preparation and a proactive approach to compliance, suppliers can navigate peak season with greater confidence and keep operations running smoothly long after the holiday rush.