UK Rules for International Data Transfers After Brexit

After the UK left the EU, personal data can no longer move freely between the UK and the EEA under the same rules. UK organisations must now follow specific mechanisms set by the UK GDPR and Data Protection Act 2018 when transferring personal data outside the UK.

This guide explains the main routes available, with a focus on adequacy decisions and standard contractual clauses, and sets out practical steps that early-stage e-commerce founders and online sellers should follow.

Why data transfers matter for UK e-commerce businesses

Most UK e-commerce operations rely on tools and platforms hosted outside the UK. Payment processors, email marketing services, analytics platforms, fulfilment partners and cloud storage providers often process customer names, addresses, order details and payment information. Each time data leaves the UK, the business must ensure the transfer is lawful.

Failure to meet the rules can lead to regulatory action from the Information Commissioner’s Office (ICO). Customers also expect their information to be handled responsibly. Getting the basics right protects the business and builds trust.

Adequacy decisions – when no extra paperwork is needed

The UK Government can decide that a country or territory offers an adequate level of data protection. Where an adequacy decision exists, personal data can be transferred there without additional safeguards.

As of 2024 the UK has adequacy decisions covering the European Economic Area countries, certain sectors in Canada and Japan, and a small number of other territories. The list can change. Always check the current GOV.UK adequacy decisions page before relying on this route.

For many e-commerce sellers this means data can still move to EU-based fulfilment centres or marketing tools without extra contracts. However, popular platforms based in the United States do not benefit from a general UK adequacy decision, so another mechanism is required.

Standard Contractual Clauses (SCCs) – the main practical safeguard

When there is no adequacy decision, the most common legal tool is the International Data Transfer Agreement (IDTA) or the UK Addendum to the EU Standard Contractual Clauses. These are template contracts approved by the ICO that commit the overseas recipient to protect the data to UK standards.

The UK Addendum is designed to be attached to the 2021 EU SCCs. It is the version most UK businesses currently use. The recipient must also carry out a risk assessment (sometimes called a transfer risk assessment or TRA) to confirm that the laws and practices in the destination country will not prevent the clauses from being honoured.

Practical tip: many large SaaS platforms have already signed the UK Addendum on their standard terms. Check the provider’s privacy policy or data processing addendum first. If they have pre-signed, your task is simply to complete the details and keep a copy.

Practical steps for e-commerce businesses

Follow these steps in order:

Map every tool and service that receives personal data from your UK customers or website visitors. Include analytics, advertising pixels, email platforms, payment gateways, shipping partners and any app or plugin.
Determine the destination country for each transfer. Many US-based providers process data in the United States; some also use sub-processors in other countries.
Check the GOV.UK adequacy list. If the country has adequacy, record that fact and move on.
For countries without adequacy, obtain the signed UK Addendum or IDTA from the provider. Most reputable platforms publish these documents in their legal centre.
Carry out and document a transfer risk assessment. Consider the nature of the data (names, contact details, order history), the laws in the destination country, and any supplementary measures you can apply such as encryption.
Update your privacy policy and any customer-facing notices to reflect the transfers and the safeguards used.
Keep records of all assessments and contracts. The ICO may ask to see them during an investigation.

Repeat the process whenever you add a new tool or the provider changes its sub-processors.

Common tools and typical transfer routes

Shopify, WooCommerce and similar platforms often transfer data to the United States or Canada. Most have published UK Addendums. Google Analytics and Meta advertising pixels route data to the US; both providers offer signed agreements, but you must still complete your own risk assessment.

Email platforms such as Klaviyo or Mailchimp usually require a signed addendum. Payment processors like Stripe or PayPal maintain their own data transfer documentation. Review each one individually rather than assuming a single contract covers everything.

If you use an overseas fulfilment warehouse, the contract with that partner must also contain the correct clauses. For very small volumes some businesses choose to limit the data sent (for example, anonymised tracking only) to reduce compliance effort.

Ongoing responsibilities and record keeping

Data transfer rules are not a one-off exercise. Providers update their sub-processor lists, laws in destination countries can change, and new tools are added as the business grows. Set a calendar reminder to review transfers at least once a year.

Document every decision. A simple spreadsheet listing each service, destination country, adequacy status or contract reference, and the date of the latest risk assessment is sufficient for most early-stage companies. Store the signed contracts in the same place.

If you sell to customers in the EEA you must also consider the EU GDPR rules that apply in parallel. The same practical steps usually satisfy both regimes when the correct UK and EU versions of the clauses are in place.

Getting help and staying up to date

The ICO website contains detailed guidance on international transfers, template risk assessment documents and the current adequacy decisions. GOV.UK also publishes updates when new adequacy decisions are made.

Many e-commerce platforms now include compliance checklists in their help centres. Use these resources first. For complex setups or high-risk transfers, consider speaking to a solicitor who specialises in data protection, but the majority of straightforward online shops can meet the requirements using the steps above.

Founders based at Loomworks in Liversedge can discuss basic data-mapping approaches with the operator team, although specialist legal advice should still be obtained for final contracts.

Frequently asked questions

Do I need a separate contract for every overseas supplier?

No. Many large providers have already signed the UK Addendum and make it available for you to countersign. You only need to review and keep a copy. Smaller or custom suppliers may require you to send them the template to sign.

What is a transfer risk assessment and do I really need one?

A transfer risk assessment checks whether the laws in the receiving country could undermine the protections in the contract. The ICO expects most UK businesses to complete one. Templates are available on the ICO website and usually take a few hours to complete for standard e-commerce data.

Can I still use US-based tools like Google Analytics after Brexit?

Yes, provided you have the correct UK Addendum in place and have completed a risk assessment. Many UK e-commerce stores continue to use these tools. Some businesses also choose privacy-friendly alternatives that store data inside the UK or EEA.

Does this apply if I only sell inside the UK?

It applies as soon as any personal data leaves the UK. Even a UK-only shop usually uses at least one overseas analytics or advertising service, so the rules are relevant for almost every online seller.

How often must I review my data transfers?

Once a year is a sensible minimum for most small businesses. You should also review immediately if you add a major new tool, a provider changes its sub-processors, or the ICO updates its guidance.