International selling for ecommerce sellers has moved from a niche opportunity to a default growth strategy in 2026. Amazon’s Pan European and export programmes, TikTok Shop’s rollout across the US and Europe, eBay’s global shipping programme, Etsy’s built in overseas reach and Shopify Markets all make it easier than ever to sell into new countries without setting up a local company first. The accounting and compliance side, however, rarely keeps pace with how quickly a store can start shipping abroad.
Many Amazon, Shopify, eBay, Etsy and TikTok Shop sellers only discover the true cost of trading overseas once customs charges, import VAT and unfamiliar registration rules start eating into margin, sometimes months after the first international order goes out the door. This guide explains what international selling for ecommerce sellers UK actually involves, how customs duty and import VAT work in practice, when schemes such as the EU One Stop Shop or US sales tax rules apply, and the practical steps worth taking before stock is shipped abroad. If you already sell internationally and want your VAT position checked properly, our VAT service is built around exactly this kind of cross border complexity.
What International Selling for Ecommerce Sellers Actually Involves
International selling for ecommerce sellers covers two quite different activities that often get treated as one. The first is exporting goods directly from the UK to an overseas customer, where the parcel crosses a border only once. The second is holding stock inside a warehouse in another country, such as Amazon FBA in Germany, France or the US, so that local customers receive faster delivery. Each route creates a different set of customs, VAT and reporting obligations, which is exactly why so many sellers get caught out when their setup changes without their accounting keeping up.
Amazon sellers using Pan European FBA, TikTok Shop sellers launching into the US, eBay sellers switching on global shipping, and Etsy or Shopify sellers simply seeing more overseas orders arrive, are all doing international selling for ecommerce sellers whether they have planned for it or not. The platform makes the sale easy. It does not file the customs declaration or register you for tax where your customer lives.
Customs Duty Basics for International Selling for Ecommerce Sellers
Customs duty is one of the first costs that catches sellers out once international selling for ecommerce sellers becomes a regular part of the business rather than an occasional order. Every product shipped across a border needs a commodity code, sometimes called an HS code, which determines the rate of duty due and whether any restrictions apply. Getting this code wrong can mean paying the wrong amount of duty, or having a shipment held at the border while it is queried.
A commercial invoice showing an accurate value, the correct commodity code and the country of origin needs to accompany every international shipment. Sellers also need to decide who is responsible for duty and import VAT at the point of delivery, known as the incoterm, with Delivered Duty Paid meaning the seller collects and pays these costs upfront, and Delivered At Place meaning the customer is billed on arrival. Getting this choice wrong is a common source of refused deliveries and unhappy customers. The official GOV.UK guidance on importing and exporting goods sets out the current rules in full.
Import VAT and Export VAT for International Selling for Ecommerce Sellers
Import VAT is charged when goods physically enter a country, and it catches sellers on both sides of international selling for ecommerce sellers. Stock bought from an overseas supplier and brought into the UK for resale usually has import VAT due at the border, though postponed VAT accounting lets many sellers declare and reclaim this on the same VAT return rather than paying cash upfront. Goods sent from the UK to a customer abroad, by contrast, can often be zero rated for UK VAT purposes, with import VAT and duty then due in the destination country instead.
Where sellers go wrong is treating every overseas sale as if it sits outside the UK VAT return altogether. Export evidence needs to be kept to support zero rating, and any VAT paid or reclaimed on the buying side of the business still needs to be accounted for correctly. This is one of the areas our VAT service reviews closely for growing sellers, alongside the domestic VAT position covered in our guide to VAT for ecommerce sellers.
EU OSS, US Sales Tax and Other Overseas Registration Rules for International Selling for Ecommerce Sellers
Once international selling for ecommerce sellers extends beyond the UK, a second layer of registration often applies on top of UK VAT. Selling goods to consumers across the EU can bring a seller within the EU One Stop Shop scheme, which allows VAT on distance sales to be reported through a single return rather than registering separately in every EU country a customer happens to live in.
Selling into the US brings a different set of rules entirely. Individual states apply their own sales tax, and economic nexus rules mean a seller can become liable to register once sales into that state pass a certain value or number of transactions, even without any physical presence there. Amazon US FBA sellers and TikTok Shop US sellers are particularly exposed to this, since fulfilment stock sitting in a state can itself create a registration obligation. Canada, Australia and other markets each apply their own thresholds again, so international selling for ecommerce sellers rarely means learning one extra rule, it usually means learning several at once.
Common Mistakes Sellers Make with International Selling for Ecommerce Sellers
The same handful of mistakes come up again and again once international selling for ecommerce sellers starts to scale. Undervaluing goods on a commercial invoice to reduce duty is not just risky, it is a customs offence in most countries. Ignoring incoterms and leaving customers to discover a surprise duty bill on delivery is one of the fastest ways to generate refund requests and negative reviews.
Other frequent issues include missing an EU OSS registration until a threshold has already been breached, treating VAT collected on behalf of an overseas tax authority as if it were revenue, and running multi currency sales through bookkeeping that was only ever set up for pounds sterling. Several of these link directly back to weaknesses covered in our guide to common ecommerce accounting mistakes, and they tend to get worse, not better, once a seller starts trading in more than one country.
Currency and Bookkeeping for International Selling for Ecommerce Sellers
Multi currency payouts add another layer of complexity to international selling for ecommerce sellers that is easy to underestimate. Amazon, Shopify and TikTok Shop settle overseas sales in the local currency before converting to pounds sterling, often at a rate and on a schedule the seller has little control over. Without careful bookkeeping, currency conversion charges and exchange rate movements get buried inside marketplace fees rather than tracked as their own cost.
Reconciling this properly means recording each currency separately at the point of sale, then tracking the actual conversion rate applied when funds are paid out, rather than assuming one rate applies throughout. Our bookkeeping service is set up to handle exactly this kind of multi currency, multi platform reconciliation, and our CFO service can turn the resulting numbers into a forecast that reflects true, cross border profitability rather than a blended estimate.
Preparing for International Selling for Ecommerce Sellers Before You Expand
Getting ready for international selling for ecommerce sellers before the first overseas shipment saves far more time than sorting out problems after the event. Getting an EORI number is one of the first practical steps, since it is required to move goods between the UK and most other countries, and the GOV.UK EORI guidance explains how to apply and which number you need depending on the direction of trade.
Beyond that, it is worth checking commodity codes for your products in advance, deciding on an incoterm you can apply consistently, reviewing whether EU OSS or US state registrations will be needed once volumes grow, and making sure your company structure and reporting can cope with the extra complexity. Our company formation service and specialist tax advice service both support sellers working through exactly this kind of expansion planning.
How NS Accounting Helps with International Selling for Ecommerce Sellers
At NS Accounting, we work specifically with Amazon, Shopify, eBay, Etsy and TikTok Shop sellers, so we understand how customs duty, import VAT, EU OSS and US sales tax rules interact with a UK based ecommerce business trading across borders. We support sellers with VAT, bookkeeping, statutory accounts, company formation and CFO level reporting, all built around the reality of international selling for ecommerce sellers who ship and hold stock in more than one country at once.
Our dedicated page for ecommerce sellers, influencers and content creators covers the full range of support available, and if you are planning to expand internationally or already trading overseas and want the numbers checked properly, book a free consultation with our team and we will help you get it right from the start.
