If you’re selling into the EU from outside the bloc, you’ve probably come across two acronyms that seem to pop up everywhere: EORI and IOSS. Whilst they might sound like bureaucratic jargon, understanding how these two systems work together can genuinely transform your cross-border shipping operations, making customs clearance smoother, faster, and far less stressful.
Let’s break down what each one does, why you need both, and how they complement each other to keep your parcels moving efficiently across EU borders.
What exactly is an EORI number?
The Economic Operators Registration and Identification (EORI) number is essentially your business’s unique identifier for customs purposes. Think of it as your passport for moving goods in and out of the EU. Without it, your shipments won’t clear customs, it’s that simple.
Every business engaged in import or export activities with the EU needs an EORI number. This applies whether you’re based in the UK post-Brexit, operating from the US, China, or anywhere else outside the European Union. The number follows a specific format, typically starting with your country code followed by a unique identifier.
What’s brilliant about EORI is that it’s valid across all EU member states. You don’t need 27 different numbers, just one does the job for the entire bloc.
Understanding IOSS: Your VAT solution for low-value goods
The Import One-Stop Shop (IOSS) is a relatively newer scheme introduced in July 2021, designed specifically for distance sales of goods valued at EUR 150 or less. It’s a voluntary VAT collection mechanism that allows you to charge, collect, and remit VAT at the point of sale rather than at importation.
Here’s why this matters: before IOSS existed, customers often faced unexpected VAT bills and handling fees when their parcels arrived. This led to abandoned deliveries, unhappy customers, and significant operational headaches for sellers. IOSS eliminates this friction entirely by sorting out the VAT upfront.
When you’re registered for IOSS, you collect the appropriate VAT rate during checkout, declare it in a monthly return, and your goods clear customs without additional VAT charges to the customer.
How do EORI and IOSS work together?
Now here’s where things get interesting. EORI and IOSS aren’t competing systems, they’re complementary. Your EORI number is about identification and customs clearance, whilst IOSS handles the VAT side of things. You need both to create a seamless shipping experience.
When your parcel arrives at an EU border, customs authorities check two things: who’s importing the goods (that’s where your EORI number comes in) and whether VAT has been properly handled (which is where IOSS provides the solution).
Your IOSS number should be included on the customs declaration alongside your EORI number. This tells customs officers that VAT has already been collected and declared through IOSS, so they can release the goods without applying import VAT. The parcel moves through customs faster, your customer receives their order promptly, and everyone’s happy.
Why you can’t skip either one
Some sellers wonder if they can manage with just one or the other. The short answer? No, you really can’t.
Without an EORI number, your goods simply won’t be processed through customs. They’ll sit in a warehouse somewhere whilst you scramble to get registered, costing you time, money, and customer goodwill.
Without IOSS (for eligible shipments), your customers will face unexpected charges upon delivery. Many will refuse the parcel, leaving you with return shipping costs and lost sales. Even if they do accept, the poor experience damages your reputation and reduces the likelihood of repeat purchases.
Together, however, EORI and IOSS create a powerful combination that streamlines the entire process from checkout to delivery.
The practical benefits of using both systems
When you’ve got both your EORI and IOSS registrations properly sorted, several advantages emerge:
Faster customs clearance is perhaps the most immediate benefit. Parcels with proper EORI and IOSS documentation move through customs checkpoints significantly quicker than those without. We’re talking hours instead of days in many cases.
Improved customer satisfaction follows naturally. When customers know the price they see at checkout is the final price, with no surprise fees at delivery, they’re more confident about completing their purchase. This transparency builds trust and encourages repeat business.
Reduced operational complications mean fewer customer service enquiries about delayed parcels or unexpected charges. Your team spends less time firefighting and more time growing the business.
Competitive advantage shouldn’t be underestimated either. Many smaller sellers haven’t properly set up IOSS and EORI, so their delivery experience is subpar. By getting these fundamentals right, you immediately stand out from competitors who haven’t bothered.
Common Mistakes to Avoid
Even with both registrations in place, sellers sometimes trip up on the execution. One frequent error is failing to include the IOSS number on customs declarations. If it’s not there, customs won’t know that VAT has been handled, and they’ll apply it again, defeating the entire purpose.
Another issue crops up when sellers use incorrect VAT rates at checkout. IOSS requires you to charge the VAT rate applicable in the customer’s destination country, not a flat rate. Getting this wrong creates discrepancies that can trigger audits and penalties.
Some businesses also forget that IOSS only applies to consignments valued at €150 or less. For higher-value shipments, you’ll need different VAT arrangements, though your EORI number remains essential for customs clearance regardless of the parcel’s value.
Getting started: The registration process
Registering for both systems needn’t be overwhelming. For your EORI number, you’ll typically apply through your country’s customs authority. UK businesses, for instance, apply through HMRC. The process is usually straightforward and free.
IOSS registration is a bit more involved, as you’ll need to register in an EU member state. Many non-EU businesses work with fiscal intermediaries who can register on their behalf and handle the monthly VAT returns. This approach often makes sense, as it ensures compliance whilst allowing you to focus on selling.
Is professional support worth considering?
Managing EORI and IOSS compliance yourself is certainly possible, but it does require ongoing attention. Monthly IOSS returns need to be accurate and timely. Your EORI details must be correctly included on every customs declaration. VAT rates need updating when they change in different member states.
For many growing e-commerce businesses, partnering with specialists who understand these systems inside-out proves invaluable. They handle the technical compliance work, alert you to regulatory changes, and ensure your documentation is always shipshape.
Ready to simplify your EU shipping?
Getting EORI and IOSS working together doesn’t have to be complicated. At Cross Border VAT, we help e-commerce sellers navigate EU compliance requirements every day, from initial registration through ongoing filing and everything in between.
Let’s get your cross-border operations running smoothly. Contact our team today for a free consultation and discover how we can take the hassle out of EU VAT compliance.
