If your business regularly exports goods abroad for repair, maintenance, or processing before reimporting them to the UK, you could be paying far more customs duty than you need to. Outward Processing Relief (OPR) is a HMRC-authorised procedure that can significantly reduce — or even eliminate — the customs duty and import VAT you owe when those goods return.

This guide explains exactly how OPR works, who qualifies, how to apply, and what practical steps you need to take to start saving.

What Is Outward Processing Relief?

OPR is a customs procedure that allows UK businesses to temporarily export goods for processing, repair, or manufacture abroad, and then reimport the processed goods with reduced or zero customs duty. Instead of paying duty on the full value of the reimported goods, you only pay duty on the value added abroad — that is, the cost of the repair or processing work carried out outside the UK.

The relief also applies to import VAT, meaning your VAT liability is calculated only on the added value rather than the total value of the reimported goods.

This procedure is governed by UK customs legislation and administered by HMRC. The official guidance is available at: Apply to pay less duty on goods you export to process or repair – GOV.UK.

When Does OPR Apply?

OPR is designed for situations where UK-origin goods (or goods in free circulation in the UK) are sent abroad temporarily and then returned after processing. Common scenarios include:

• Industrial machinery sent to a specialist facility abroad for repair or overhaul
• Electronic components exported for assembly or testing
• Textile products exported for finishing processes such as dyeing or embroidery
• Vehicles or aircraft exported for maintenance work
• Consumer electronics returned to manufacturers abroad for warranty repair

The key requirement is that the goods are temporarily exported — they must return to the UK after processing.

How Much Can You Save?

The saving depends on the total customs duty rate for your goods and the proportion of value added abroad. Here is a worked example:

Imagine you export a piece of industrial equipment worth £50,000 to Germany for specialist repair costing £8,000. The UK customs duty rate for that equipment is 4%.

• Without OPR: Duty on reimport = 4% × £58,000 = £2,320
• With OPR: Duty on added value only = 4% × £8,000 = £320
• Saving: £2,000 on a single transaction

For businesses that regularly send high-value goods abroad for processing, these savings can amount to tens or hundreds of thousands of pounds annually.

Types of OPR Authorisation

There are two routes to using OPR in the UK:

Full Authorisation

This is the standard route for businesses that regularly use OPR. You apply to HMRC and receive an authorisation number that you use on all OPR customs declarations. You must apply at least 30 days before you intend to start using the procedure. Full authorisation offers the most flexibility and is typically the right choice if you send goods abroad for processing more than a few times per year.

Authorisation by Customs Declaration

In some circumstances, you can use OPR on a single-shipment basis without prior authorisation, by making the appropriate declaration at the time of export. However, this route has more restrictions and is not suitable for all situations.

Step-by-Step: How to Apply for Full OPR Authorisation

1. Check eligibility: Confirm that your goods and processing activity qualify for OPR under UK customs rules.
2. Obtain an EORI number: You must have a UK Economic Operator Registration and Identification (EORI) number before applying.
3. Gather documentation: Prepare details of your goods (commodity codes), the processing operation, the overseas processor, and estimated quantities and values.
4. Submit your application: Apply to HMRC using the Customs Authorisation and Decision System (CADS) or by contacting the National Clearance Hub. Allow at least 30 days for processing.
5. Declare at export: When your goods leave the UK, reference your OPR authorisation on the export declaration.
6. Declare at reimport: When the processed goods return, use procedure code 6110 (or the relevant equivalent) on your import declaration to claim OPR relief.
7. Maintain records: Keep detailed records of goods exported and reimported under OPR, including processing costs. HMRC may audit these records.

For professional support with OPR applications and declarations, specialist customs agents can manage the entire process. Explore OPR application support from experienced customs practitioners.

Key Conditions and Compliance Requirements

To maintain your OPR authorisation, you must:

• Use the goods only for the processing activity described in your authorisation
• Ensure the processed goods are reimported within the time limit specified in your authorisation (typically 6 to 24 months)
• Maintain a Bill of Discharge — a record reconciling goods exported with goods reimported
• Notify HMRC if there are significant changes to your processing operations
• Keep all supporting documentation for at least 4 years

If you regularly export goods for processing and want end-to-end customs management, export processing services can help streamline your compliance.

OPR vs. Inward Processing Relief: What Is the Difference?

These two reliefs are frequently confused. The key distinction is the direction of movement:

• OPR (Outward Processing Relief): UK goods exported abroad for processing and reimported — you save duty on the value added overseas.
• IPR (Inward Processing Relief): Non-UK goods imported into the UK for processing and then re-exported — you suspend duty during the processing period.

Both are valuable tools in a comprehensive customs duty management strategy. The right choice depends on your supply chain model.

FAQ — Outward Processing Relief

Conclusion

Outward Processing Relief is one of the most effective — and underused — duty relief mechanisms available to UK exporters. If your business sends goods abroad for processing, repair, or manufacture and then reimports them, you should be using OPR. The potential savings are substantial, the application process is straightforward with proper preparation, and the compliance obligations are manageable with good record-keeping systems in place.

Apply at least 30 days before you intend to start, keep meticulous records, and consider working with an experienced customs agent to ensure you maximise your relief entitlement.