Regulatory Compliance: ISPM-15 (2026 Update)

ISPM-15 is an international phytosanitary standard for wood packaging material; the 2026 update reinstates strict hyphenated marking and requires heat treatment to 56°C for 30 minutes, with immediate enforcement at U.S. ports.

Overview:

ISPM-15 (International Standards for Phytosanitary Measures No. 15) is the global standard that governs the treatment and marking of wood packaging material (WPM) used in international trade, such as pallets, crates, dunnage, and other wood materials. The standard’s purpose is to reduce the risk of introducing and spreading quarantine pests associated with raw wood. The 2026 update from the U.S. Animal and Plant Health Inspection Service (APHIS) reaffirms strict technical and enforcement elements that importers, exporters, carriers, and packaging suppliers must follow when moving goods to and from the United States.

Key changes effective January 1, 2026:

• Hyphen requirement in the ISPM-15 mark: APHIS requires that the ISPM-15 mark on all wood packaging material include a hyphen separating the country code and the facility code. Example format: US-12345. Marks lacking the hyphen are non-compliant.
• Strict enforcement at U.S. ports: There is no soft enforcement or grace period. Non-compliant WPM arriving at U.S. ports after January 1, 2026, may be immediately re-exported, destroyed, or separated from the consignment at the owner’s expense, depending on inspection findings and port authority actions.
• Heat treatment (HT) requirement: All timber used as WPM must be heat-treated so that the core temperature of the wood reaches 56°C (132.8°F) for a minimum of 30 minutes. This treatment standard is to eliminate wood-boring insects and pathogens.

What is considered wood packaging material (WPM)? WPM includes pallets, pallet collars, crates, boxes, dunnage (wood used to brace cargo), packing blocks, spools, and other wood components used to support, protect or carry a commodity during transport. Processed wood that has been modified in ways that remove pest risk (e.g., plywood, particleboard, oriented strand board) is typically exempt from ISPM-15, but check national regulations.

Marking details and why the hyphen matters: The ISPM-15 mark is a specific graphic that indicates compliance, usually consisting of the IPPC symbol, a two-letter country code, a facility or producer code, and a treatment code (e.g., HT). APHIS’s re-enforcement of the hyphen between country and facility code standardizes the machine- and human-readable format used by inspectors and electronic systems to quickly validate the mark’s provenance and treatment record. For example, a compliant stamp would read: IPPC US-12345 HT. Marks without the hyphen (e.g., US12345) are now considered non-compliant for shipments to the U.S.

Treatment requirements: The 56°C for 30 minutes core treatment requirement (HT) is designed to reach lethal temperatures for wood-boring pests within the wood’s core. Treatment must be documented and, in many cases, performed by an authorized treatment provider who can certify the process and apply the ISPM-15 mark with the correct format. Maintain records of treatment logs, equipment calibration, and certificates to demonstrate compliance during audits or inspections.

Consequences of non-compliance:

• Immediate actions at port: separation of shipment, re-export, or destruction of non-compliant WPM at the owner’s expense.
• Operational delays: cargo holds, storage fees, and detention can quickly escalate costs and disrupt supply chains.
• Reputational and commercial impact: repeated non-compliance can lead to increased inspections, fines, and loss of trading privileges or preferred carrier arrangements.

Practical steps to comply (exporters, shippers, and packaging suppliers):

1. Audit your wood packaging inventory to identify pallets, crates, and dunnage destined for international movement to/from the U.S.
2. Ensure heat treatment records are in place and that treatment providers can demonstrate that core temperatures reached 56°C for 30 minutes. Keep treatment certificates for at least the period required by national authorities.
3. Confirm that the ISPM-15 mark is applied correctly with the hyphenated format (e.g., US-12345) and the applicable treatment code (HT).
4. Use authorized treatment facilities and ensure facility codes are legitimate and traceable to a national plant protection organization or its accredited agent.
5. Implement incoming inspections for inbound packaging and perform supplier/vendor qualification for packaging vendors.
6. Train logistics, packaging, and procurement teams on the 2026 requirements and include ISPM-15 checks in shipping checklists and bill-of-lading audits.

Best practices:

• Standardize supplier contracts to require ISPM-15-compliant WPM for international shipments and include audit rights.
• Label treated wood clearly and use barcode or QR-based traceability tied to treatment records for rapid verification.
• Retire or repair damaged WPM that could hide or remove the ISPM-15 stamp before reuse in international shipments.
• Maintain a centralized record management system for treatment certificates and inspection reports.

Common mistakes to avoid:

• Using locally fabricated or repaired wood crates without re-treating and re-marking them for export.
• Relying on outdated or incomplete treatment records that lack date, temperature logs, or authorized provider details.
• Assuming processed wood is always exempt without confirming specific material composition and national regulations.

Example scenario:

A company ships machinery to the U.S. using plywood crates and wooden dunnage. Although the machinery is compliant, the dunnage is untreated and the supplier’s stamp omitted the hyphen (US12345). Upon arrival after January 1, 2026, U.S. inspectors identify non-compliant WPM and require the consignment’s re-export at the shipper’s cost, adding demurrage and transport fees. The shipper must now source compliant WPM, repackage, and provide documented treatment logs to avoid repeat issues.

Conclusion:

The ISPM-15 2026 update places renewed emphasis on precise marking and consistent heat treatment. International traders should treat this as a compliance priority: verify suppliers, maintain documentation, and integrate ISPM-15 checks into shipment workflows to avoid costly enforcement actions at U.S. ports.