E-Commerce and Customs: Rules for Selling Online Across Borders

The Rise of Cross-Border E-Commerce — and Its Customs Implications

Online retail has exploded globally, and with it, the complexity of customs compliance for e-commerce sellers. Whether you run a Shopify store shipping to EU customers, sell on Amazon’s European marketplaces, or operate a direct-to-consumer brand from the UK, every parcel crossing an international border is a customs transaction. Understanding the rules is no longer optional — it is a core part of running an international online business.

This guide explains the key customs rules that UK-based e-commerce sellers need to follow when shipping goods across borders, with a focus on practical steps to stay compliant and keep delivery times short.

De Minimis Thresholds and Low-Value Consignments

One of the most important concepts for e-commerce sellers is the de minimis threshold — the value below which goods may enter a country free of customs duty or with simplified procedures. In the UK, the Low Value Consignment Relief was abolished on 1 January 2021. This means all goods imported into the UK, regardless of value, are subject to import VAT.

For UK sellers exporting to the EU, the EU abolished its EUR 22 de minimis for VAT on 1 July 2021 with the introduction of the Import One-Stop Shop (IOSS). All goods entering the EU are now subject to VAT from the first euro. According to HMRC guidance, sellers must understand these thresholds for each destination market.

UK VAT on Overseas Goods: The OMP Rules

Since January 2021, the UK has applied specific VAT rules for goods sold online:

• Consignments valued at GBP 135 or less: VAT is charged at the point of sale (not at the border). If sold through an Online Marketplace Platform (OMP) such as Amazon or eBay, the OMP is responsible for collecting and remitting the VAT.
• Consignments valued above GBP 135: Import VAT and any applicable customs duty are charged at the border in the normal way.
• Business-to-business (B2B) sales: Different rules apply where the customer is VAT-registered and can account for VAT via reverse charge.

Getting this wrong can lead to double taxation or goods being held at customs. A specialist customs broker can advise on the correct VAT treatment for your sales model.

Customs Declarations for E-Commerce Shipments

Every commercial shipment leaving or entering the UK requires a customs declaration. For e-commerce, this typically means:

Export Declarations

UK sellers shipping goods worth over GBP 873 (or any goods requiring an export licence) must submit an export declaration via the Customs Declaration Service (CDS). Many courier and postal services handle simplified declarations for lower-value consignments, but the legal responsibility remains with the seller or their agent.

Import Declarations in Destination Countries

Your customers’ experience at the receiving end depends on correct documentation. Incomplete or inaccurate customs data leads to parcels being held, additional charges at delivery, and unhappy customers. Providing accurate HS codes, declared values, and country of origin information with every shipment is essential.

Product Compliance and Restricted Goods

E-commerce does not exempt goods from product safety regulations. UK sellers must ensure that products comply with the regulations of both the UK and the destination market. Common problem areas include:

• Electronics: Must carry appropriate conformity marks (UKCA for UK, CE for EU)
• Cosmetics: Must be registered with the relevant authority and meet labelling requirements
• Food and supplements: Subject to SPS controls and ingredient restrictions
• Toys: Must meet safety standards and carry age-appropriate warnings

Returned Goods and Reverse Logistics

Returns are a fact of e-commerce life. When goods are returned from overseas, they may qualify for Returned Goods Relief (RGR), allowing them to re-enter the UK duty-free provided specific conditions are met. According to GOV.UK, the goods must be re-imported within three years and must not have been altered abroad. Maintaining proper records is critical for claiming this relief.

Practical Tips for E-Commerce Customs Compliance

1. Classify your products correctly — invest time in accurate HS code assignment
2. Register for IOSS if selling low-value goods to EU consumers
3. Work with a fulfilment partner that understands customs documentation
4. Build customs costs into your pricing or clearly communicate them to customers
5. Keep records of all cross-border transactions for at least four years

The team at EasyClearance helps e-commerce businesses set up efficient customs processes that scale with their growth.

Related services: View our full customs brokerage services