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The UK Internal Market System (UKIMS) is a registration system required for shipping goods to Northern Ireland under the Windsor Agreement. After March 31, 2025, businesses shipping goods must be registered with UKIMS and provide a UKIMS reference number to proceed with shipments.

UKIMS Requirements
To comply with the Windsor Agreement, operators must ensure:

  • The consignment is correctly categorised (Business to Business).

  • A valid UKIMS Number is provided for shipments.

  • Required customs and commodity details are entered.


Online Helptools for Your Clients


This online tool is to help your clients comply with the Windsor agreement. This feature can be turned off in the control panel.

Providing a Description of Goods

When shipping goods to Northern Ireland, you will be prompted to enter a description of goods or select from document-only options:

  • Business Documents

  • Legal Documents

  • Office Correspondence

  • Edit Booking

These options help categorise the shipment and determine if further customs details are required.

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Confirming Business to Consumer (B2C) or Business to Business (B2B)

The system will ask whether the shipment is being sent from Business to Consumer (B2C) or Business to Business (B2B):

  • Yes to Business to Consumer – shipments directly to customers.

  • No Business to Business – business transactions where both sender and receiver are registered businesses.

Only shipments being sent Business to Business will require a UKIMS Number.

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Entering UKIMS Number (B2B)

A UKIMS number must be entered to continue processing the shipment. If the business is not yet registered with UKIMS, operators can select:

  • My Business is not Registered – For businesses that are not registered before proceeding.

  • Continue with your Reference – If the UKIMS registration is completed and a reference number is available.

If your business is not registered a customs declaration will be submitted based on the information provided. The shipment may be classed as ‘At risk’ and may also be charged at the applicable European Union (EU) rate of duty.

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Adding Commodity Details

If additional commodity details are needed for customs clearance, the system will prompt the operator to complete a commodity form.

  • Click Add Commodity Details to enter the required product information.

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Find out more about UKIMS and Windsor Agreement in the documents below:

DHL

UPS

Parcelforce