Customs procedures: free circulation, warehousing, processing, temporary admission
Updated Sep 14, 2026
Declaring goods to customs means placing them under a procedure. The procedure determines whether duties and VAT are paid immediately, suspended or partly relieved, and what you are allowed to do with the goods afterwards. Choosing the right procedure avoids paying unnecessary duties, especially on goods that will be re-exported.
The main procedures of the Union Customs Code
- Release for free circulation: imported goods become Union goods; duties are paid and, generally, import VAT too (release for home use)
- Export: goods leave the customs territory of the Union; the declaration supports the VAT exemption
- Special procedures: transit, storage (customs warehousing, free zones), specific use (temporary admission, end-use) and processing (inward or outward)
The procedure code in the declaration
The declaration states a 4-digit procedure code: the first two digits give the requested procedure, the last two the previous procedure. For example, 4000 is release for free circulation with no previous procedure, 4071 is release for free circulation of goods leaving a customs warehouse, and 1000 is a permanent export. A procedure code inconsistent with the direction of the flow is a common error, which the free check detects.
Transit
Transit lets non-Union goods move from one point of the customs territory to another without paying duties, for example from the port of arrival to the clearance office near the importer's warehouse. It is handled in the NCTS system and requires a guarantee covering the duties at stake. Transit must be discharged at destination within the set time limit.
Customs warehousing
Non-Union goods can be stored in a customs warehouse without paying import duties or VAT. These only become due when the goods are released for free circulation, and not at all if they are re-exported. The procedure improves cash flow for importers who sell their stock gradually or ship part of the goods outside the EU. It requires an authorisation.
Inward and outward processing
- Inward processing: import materials or components with duties suspended to process, repair or assemble them in the EU, then re-export the resulting products
- Outward processing: temporarily export Union goods to have them processed or repaired outside the EU, then re-import them paying duties only on the value of the operation carried out abroad
Both procedures require prior authorisation, stock records and discharge of the procedure within the set time limit.
Temporary admission
Temporary admission allows goods intended for re-export in the same state to be imported with total or partial relief from duties: professional equipment, samples, goods shown at trade fairs, packaging, means of transport. The ATA carnet simplifies formalities for these operations in the countries that accept it. Re-export must take place within the time limit set by customs.
Points to watch
- Most special procedures require an authorisation and a guarantee
- Every special procedure must be discharged: re-export, release for free circulation or placement under another procedure
- A procedure not discharged in time gives rise to a customs debt, with duties and VAT to pay
- Goods under a special procedure cannot be sold or used freely like Union goods
Frequently asked questions
Which procedure should I use for goods imported and then re-exported?
It depends on the operation: customs warehousing for simple storage, inward processing if the goods are processed, temporary admission if they are re-exported in the same state. These procedures avoid paying duties that could not be recovered.
What does procedure code 4200 mean?
It is release for free circulation followed by an exempt supply to another Member State: VAT is not paid in the country of import but is due in the country of destination. Strict conditions apply, including the VAT numbers of the importer and the buyer.
Do I need an authorisation to use a customs warehouse?
Yes. Operating a customs warehouse requires a customs authorisation. A company can also use the public warehouse of an authorised logistics provider.
What does discharging a procedure mean?
It is the closure of the special procedure when the goods leave it: re-export, release for free circulation or placement under another procedure. Without discharge in time, duties become payable.
What is an ATA carnet?
An international customs document for temporarily importing professional equipment, samples or trade fair goods without paying duties, in the countries party to the convention. It is usually issued by chambers of commerce.
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