Colombia plastic tax compliance now requires importers to obtain far more precise data about the single-use plastic associated with inbound shipments. For U.S. exporters and other foreign suppliers, the central challenge is determining what information to provide, who makes the customs declaration, and how shipment-level packaging weights should be documented.
Understanding Importer and Supplier Responsibilities
The Importer Generally Owns the Customs Declaration
The Colombian importer of record typically remains responsible for declarations submitted to Colombian customs, including reportable information related to taxable single-use plastic. Procedures associated with Resolution 000005 dated February 9, 2026, place increased operational importance on identifying and quantifying plastic connected with imported goods.
A foreign supplier generally does not become the Colombian customs declarant merely because its customer requests packaging data or a signed certification letter. The importer, supported by its Colombian customs broker and tax advisers, normally determines the applicable tax treatment, calculates reportable quantities, claims any available exclusion, and submits the required declaration.
The supplier nevertheless plays a critical supporting role. Importers may have no reliable way to determine the weight or composition of bags, liners, shrink wrap, pallet corners, slip sheets, drums, or other packaging after those materials have entered the supply chain. Accurate origin-side data may therefore be essential to the importer’s compliance process.
A Customer Request Can Create a Commercial Obligation
A supplier certification letter should be distinguished from a government filing requirement. Colombian authorities may generally require the importer to retain support for declared plastic quantities, while the importer may contractually require its supplier to provide that support in a prescribed format.
Whether the supplier must sign a particular letter depends on purchase terms, customer agreements, internal legal policy, and the representations contained in the document. Suppliers should avoid certifying Colombian tax conclusions they are not qualified to make. A carefully drafted statement should instead confirm measurable facts within the supplier’s control, such as component type, polymer composition, quantity, and weight, while leaving taxability and customs reporting decisions to the importer.
Building a Defensible Plastic Packaging Statement
Report Component-Level Data Rather Than a Single Estimate
A useful plastic packaging statement should allow the importer to reproduce the reported total. Providing only an aggregate number, without explaining which materials were included, creates avoidable compliance and audit risk. The preferred approach is a component-level table tied to the commercial shipment.
For each packaging component, the statement should generally include:
- Packaging type, such as a bag, drum, liner, case insert, shrink wrap, slip sheet, pallet corner, strap, or protective film
- Plastic composition, such as PET, HDPE, LDPE, or another known polymer
- Plastic weight in grams or kilograms per unit, case, drum, or pallet
- Number of components used in the shipment
- Calculation basis and resulting shipment-level plastic weight
- Treatment of mixed-material items when plastic cannot be physically separated
The header should identify the customer, invoice number, shipment date, product, manufacturer name and address, number of saleable units, number of cases or drums, and number of pallets. Purchase orders, packing list numbers, and container references may also be included when they improve traceability.
Separate Facts From Tax Determinations
The statement should describe the packaging as shipped rather than declare whether every component is legally taxable. Applicability may depend on how Colombian law defines single-use plastic products, the intended function of the material, available exclusions, and current administrative practice.
A defensible statement might explain that the listed weights represent plastic packaging used for the identified shipment and are based on packaging specifications, supplier measurements, or approved bills of material. It should also disclose whether values are actual weights or engineering averages.
This distinction matters because the importer may combine supplier data with local repacking information, non-plastic content, customs valuation records, or tax guidance. The supplier provides reliable source data; the importer and its advisers determine how that data enters the Colombia plastic tax declaration.
Creating Scalable Shipment-Level Compliance Controls
Use Packaging Bills of Material and Version Control
Manually weighing packaging for every export shipment is rarely sustainable. Importers and suppliers should establish a packaging bill of material for each product and packing configuration. The record should identify every plastic component, its polymer type, unit weight, measurement method, effective date, and approved source.
Packaging data must also reflect operational variation. A product may ship in bags for one customer, drums for another, or different pallet configurations depending on order volume. Substituted film, redesigned containers, additional corner protection, or changes in units per pallet can alter the reportable weight even when the commercial product remains unchanged.
Version control allows the business to apply the correct packaging profile based on the shipment date and configuration. It also creates an audit trail showing why a particular plastic weight appeared on an invoice, packing list, or certification statement.
Choose Between Shipment and Blanket Statements Carefully
Shipment-specific statements are generally the strongest option because they connect packaging quantities directly to an invoice and delivery. The calculation can be expressed as the number of units multiplied by plastic weight per unit, plus pallet-level and shipment-level materials.
Blanket or annual statements may be practical for stable packaging configurations, but they should still list the covered invoices, units, pallets, and applicable packaging versions. Historical statements prepared after shipment require additional care because packaging specifications may have changed during the period.
Businesses should retain the evidence supporting each value, including scale records, manufacturer specifications, photographs, packaging drawings, and approval history. Reasonable rounding rules and units of measure should be applied consistently. Before implementation, legal, tax, logistics, and customs teams should agree on the scope of included materials, the statement language, the frequency of issuance, and the party authorized to sign.
These controls turn a recurring customer request into a repeatable trade compliance process rather than a series of unsupported manual estimates.
Frequently Asked Questions
Must a U.S. Supplier File the Colombia Plastic Tax Declaration?
Generally, no. The Colombian importer of record typically makes the relevant customs or tax declaration. A U.S. supplier usually provides packaging composition and weight data that enables the importer to calculate and support its declared quantity. The parties should confirm the precise filing responsibility with Colombian customs and tax counsel.
Is a Supplier Certification Letter Legally Required?
A specific supplier letter may not itself be a universal statutory requirement. However, an importer may request one to support its records, satisfy broker procedures, or meet contractual compliance standards. Suppliers should review the requested language and certify only factual information they can substantiate.
Is Adding Plastic Weight to Shipping Documents Sufficient?
It may be sufficient for some customers, but a single total on a commercial invoice or packing list can lack the detail needed for validation. A separate component-level statement often provides stronger support by showing polymer type, unit weight, quantity, calculation method, and the shipment references behind the total.
How Should Mixed or Composite Packaging Be Reported?
The supplier should generally identify the plastic portion separately when reliable specifications or measurements are available. If the plastic cannot be separated from paper, metal, or another material, the statement should disclose the methodology used to estimate plastic weight. The importer should determine the appropriate Colombian tax treatment.
Can One Packaging Statement Cover Multiple Shipments?
A blanket statement can work when packaging specifications remain consistent and all covered invoices are clearly identified. Shipment-level statements are typically easier to reconcile and audit. If a historical statement covers multiple deliveries, it should document invoice numbers, unit totals, pallet totals, effective packaging versions, and any known exceptions.
How Stable Software Can Help
Automating Packaging Data and Customs Workflows
Colombia plastic tax compliance creates another data requirement that must be connected to products, suppliers, invoices, and customs entries. Manual spreadsheets and one-off certification letters can quickly produce inconsistent units, outdated packaging weights, and weak shipment traceability.
Stable Software helps importers and customs brokers centralize trade data, standardize document workflows, and automate compliance processes across high-volume operations. Structured packaging attributes can be linked with shipment records, reviewed through defined controls, and made available for declarations or customer documentation. This approach gives compliance teams a more reliable audit trail while reducing repetitive data entry and coordination between suppliers, brokers, logistics teams, and import departments.
