IOSS-Registrierungsguide: Versand vu China an d'EU am Joer 2026
Introduktioun
The Import One-Stop Shop, or IOSS, has been the unsung hero of cross-border e-commerce between China and the European Union for years. It allowed retailers to collect VAT at the point of sale, clear shipments more quickly and avoid surprise invoices appearing on a customer’s doorstep. That backbone is being challenged today. The EU abolished the €150 duty-free barrier that had existed for years and applied a flat €3 customs duty on almost all low-value parcels coming into the bloc from outside the EU, on July 1, 2026, and added an extra handling cost that will probably be adopted by the end of the year.
This is not a little technical update for sellers shipping from China. It impacts how checkout pricing is calculated, who is legally accountable for customs declarations and how quickly a parcel actually reaches an EU doorstep. Businesses that already have an IOSS number are in a much better place than those that don’t in most circumstances as the new responsibility is designed to work alongside IOSS and not around it.
In this post we take a look at what IOSS truly performs, what happened in the 2026 reform, how to register step by step and what documents an EU intermediary will generally ask for. It also looks at where a logistics partner like Topway Shipping fits in, as registration is only half the story, seamless customs clearance being the other half.
What Is IOSS and Why It Matters More in 2026
IOSS is an electronic portal that allows a seller, or an intermediary acting on behalf of a seller, to collect VAT from buyers in the EU at the point of sale and remit it via a single tax authority in a single monthly return. Instead of registering for VAT in all the EU member states where a consumer can order products from, the seller declares everything once, with one identification number for goods up to €150 per consignment.
IOSS was seen as optional for many small and mid-sized suppliers until 2026. But parcels without an IOSS number were nonetheless cleared, only more slowly, and sometimes clients paid VAT and handling charges to the courier on delivery. That option is pretty much off the table now. Non-IOSS packages are scrutinised further, with separate duty assessment and delivery-time charges high enough to impair conversion rates and cause complaints.
Note that vendors on prominent marketplaces like Amazon or eBay normally don’t need to register individually. These platforms are the considered supplier for VAT reasons and will use their own IOSS number on eligible orders. But independent sellers with their own Shopify or WooCommerce stores still have to register themselves, or register via an intermediary.
The 2026 EU Customs Reform in Brief
The reform did not occur in a single event. It has been rolled out in phases during 2026 and into 2027 and 2028, with each phase affecting a different part of the shipping process. Below is a table of the critical dates that matter for a China based supplier shipping to the EU.
| Effektiver Datum | Wat ännert sech |
| Juli 1, 2026 | The €150 duty-free threshold is removed. A temporary flat customs duty of €3 per item applies to consignments up to €150 imported from outside the EU. |
| Before November 2026 | A separate EU handling fee, expected to be around €2 per consignment, is introduced and sits outside the scope of VAT. |
| November 1, 2026 | Responsibility for the import declaration shifts from the consumer to the platform or seller, who acts as the deemed importer. Three product identifiers are required for each item. |
| Januar 1, 2027 | An interim update tied to the VAT in the Digital Age package amends identification details for OSS and IOSS registrants. |
| Juli 1, 2028 | The temporary €3 duty is expected to be replaced by a more structured customs regime, and the broader technical overhaul under EU Implementing Regulation 2026/1869 takes full effect. |
None of these dates will substitute or override IOSS itself. The change, if anything, makes IOSS more crucial to the process, as it is the mechanism via which the new duty is supposed to be collected properly at checkout rather than pursued down after the shipment has already left China.
How the €3 Customs Duty Interacts with Your IOSS Number
One thing that takes many sellers off surprise is how the new duty is levied. The €3 duty is excluded from VAT itself, for consignments declared under IOSS. Vendors under the Special Arrangements scheme, or clearing goods through the normal import procedure, do not get that exemption therefore there is VAT paid on top of the duty as well. That difference adds up fast with a high volume of orders.
Outside of the tax computation, there’s a day-to-day, practical impact, too. Packages declared via an active IOSS number usually clear customs with much less friction, because the VAT and duty have already been collected up front and the data submitted electronically matches what customs expects to see. Without that pre-clearance, parcels are more likely to be held aside for manual duty assessment, which slows delivery and often results in the courier charging the receiver a supplementary handling fee at the door that is commonly in the €10 to €20 range.
The practical effect is a two lane market. If sellers have their IOSS number set up correctly they can present EU customers a final all-in pricing at checkout with no surprises at delivery. Without one, sellers are progressively exposing their buyers to surprise charges, longer delivery windows, and a much greater percentage of delivery disputes and refund claims.
Step-by-Step: Registering for IOSS as a China-Based Seller
Since China is not an EU member state, a Chinese company cannot register directly with an EU tax authority for IOSS. The first step is to appoint an intermediary based in the EU. This is a corporation authorised to submit VAT returns and operate on behalf of the seller. The one option that impacts everything down the line is the decision of the intermediary as the intermediary is jointly responsible for the VAT it declares and will normally check the seller’s business records before deciding to take them on.
Once an intermediary is chosen, the seller will provide their business registration details, a description of the products they offer, an estimate of the monthly sales volume into the EU, and bank details for the monthly VAT remittance. The intermediary then applies for the IOSS number with the tax authority of the EU member state where it is established. Processing normally takes a few weeks, however timeframes may extend during times of regulation change, as several intermediaries did during the July 2026 revision.
Once the number is granted, it needs to be tied to the actual sales channels. If you’re a seller with your own website, this usually entails setting up your checkout system – whether it Shopify, WooCommerce or a custom build – to compute VAT depending on the customer’s shipping address, and to display the IOSS number on the customs papers issued for each order. If you are a seller using a goods forwarder, generally you give this number to the forwarder and they use it for all shipments going out of China.
The last, and sometimes underestimated, phase is continual maintenance. The IOSS comes with a monthly VAT return, and the need for meticulous record-keeping of every transaction for a minimum of ten years, and rapid revisions in the event of changes in product categories, sales volumes or delivery routes. Many sellers who signed up early on in the scheme’s life view the initial application as the finish line, whereas it’s more like the starting gun for a continuous compliance obligation’, said the report.
Documents and Information You Need Before You Apply
Getting the right paperwork in place early can really speed up the registration process. The requirements differ significantly amongst intermediaries, but most would want the items summarised below, before they put in an application on behalf of a seller.
| Dokument oder Informatioun | Firwat et néideg ass |
| Business Aschreiwung Zertifikat | Confirms the company’s legal existence and structure |
| Signed intermediary appointment letter | Formally authorizes the EU intermediary to act on the seller’s behalf |
| Bankkonto Detailer | Used for the monthly VAT remittance to the tax authority |
| Product catalogue and HS codes | Supports the product identifiers now required under the post-2026 declarant rules |
| Estimated monthly EU sales volume | Helps the intermediary size its service and pricing tier |
| Existing sales channel details | Ensures the IOSS number is correctly connected to every storefront or marketplace in use |
It’s best to have this material ready before you Kontakt an intermediary, rather than during the application, as most registration stalls in initial review cycle are due to incomplete submissions.
IOSS vs Non-IOSS: What EU Customers Actually Experience
The gap between IOSS and non-IOSS shipments is easiest to see side by side. The comparison below reflects the situation as it stands after the July 2026 reform.
| Factor | With IOSS | Without IOSS |
| VAT at checkout | Charged upfront, included in final price | Often not collected until delivery |
| €3 flat duty | Exempt from VAT, applied through the IOSS declaration | VAT applies on top of the duty |
| Douane Minnen | Faster, pre-cleared electronically | Slower, subject to manual review |
| Delivery-time charges | Rare, since VAT and duty are prepaid | Common, often €10 to €20 or more |
| Clienterfahrung | Predictable, no surprise fees | Higher risk of disputes and refused parcels |
Common Mistakes Chinese Sellers Make with IOSS
Quite a few registration problems are nothing to do with the EU side of the process. They begin with inadequate or inconsistent business documentation on the China side, especially when a company’s registered name in Chinese does not line up cleanly with the English name used on international shipping and marketplace accounts. These often need to be aligned by intermediaries and mismatches are one of the most common causes of delays.
Another mistake is to see the IOSS number as a one-off setting and not as an ongoing compliance responsibility. Sellers occasionally forget to change the number when adding a new sales channel, or continue to use an old number after changing intermediaries. This might result in VAT being declared improperly, or not at all, for some of the orders.
The third concern, which is more unique to 2026, is the new product identifiers needed for customs declarations. Otherwise properly IOSS-registered shipments are still being flagged, simply because the underlying product data submitted with the declaration is incomplete, as sellers who have not updated their product data to include accurate HS codes and the additional identifiers now being expected under the reform have learned.
Finally, some merchants don’t understand how much slower and more costly shipping is without IOSS until they’ve built a customer base. What appears like a cheap pricing at checkout can end in a bad customer experience when a courier charges an unexpected fee at the door. Refund requests and unfavourable reviews that follow usually cost more than the compliance work would have.
Choosing a Reliable Logistics Partner: Where Topway Shipping Fits In
IOSS registration solves the tax side of the question but VAT and duty are only effective if the goods really transit seamlessly from a warehouse in China to a customer’s door in the EU. At this point, the choice of logistics partner is as important as the choice of intermediary.
Founded in 2010, Topway Shipping, based in Shenzhen, has been providing cross-border e-commerce logistics services. The founding team has over fifteen years experience in international logistics and customs clearance, with particular depth in China to U.S. transport, which has now expanded to greater worldwide coverage, including shipments to the E.U. And because the company works the entire logistics chain, from first-leg pickup in China to overseas Lagerung, customs clearance and last-mile delivery, an IOSS-registered seller can coordinate every stage of the shipment with the correct VAT and duty treatment, rather than passing off responsibility to disconnected vendors at each step.
Topway Shipping provides flexible full container load and less-than-container-load ocean freight services from China to major ports around the world for sellers moving greater volumes. This is a good fit for enterprises who mix e-commerce package shipments with bulk replenishment of overseas warehouses. With a well-configured IOSS number and a forwarder that understands both the customs side and the physical flow of goods, you decrease the number of areas where a shipment can go wrong between a Chinese warehouse and an EU customer’s inbox.
Conclusioun
The 2026 reform has not made IOSS optional, but in some ways it has made it more valuable than it ever has been. With the removal of the €150 threshold and the imposition of a flat customs duty on practically all low-value packages, the sellers best positioned to offer predictable pricing and speedy delivery are those who signed up early, kept their paperwork up-to-date, and coupled that registration with a logistics partner able to deliver on it.
For a business shipping from China, the practical way forward is simple, even if the regulatory backdrop is not: appoint a reliable EU intermediary, gather the necessary business documentation, update product data to meet the new identifier requirements, and link the resulting IOSS number to each sales channel you use. By partnering with an experienced forwarder like Topway Shipping on the physical aspects of the shipment, from first-leg transportation through customs clearance and last-mile delivery, you close the remaining gap between having the right paperwork and actually getting parcels to EU customers without delay.
FAQs
Q: Is IOSS registration mandatory for shipping to the EU in 2026?
A: It’s not a legal requirement, but if you ship without it now you will have lengthier customs processing, VAT paid on the new €3 duty and a considerably higher likelihood of delivery-time costs for the buyer.
Q: Can a company based in China apply for IOSS directly?
A: Nope. A non-EU corporation must use an intermediary based in the EU to apply for and manage the IOSS number for the company.
Q: Does IOSS still apply after the €150 threshold was removed?
A: Sure. IOSS still covers consignments up to €150 and now the new flat customs duty is applied via the same process without extra VAT.
Q: How long does IOSS registration typically take?
A: Most intermediaries will tell you that the turnaround time is a few weeks once all the documentation are received, however this may be longer in times of regulatory shift.
Q: Do sellers on marketplaces like Amazon need their own IOSS number?
A: Not exactly. If the marketplace is the presumed supplier, then it will use its IOSS number for eligible orders. Therefore, individual merchants on these platforms usually do not register separately.
Q: What happens if a parcel is shipped without an IOSS number?
A: It can still be delivered but is more likely to be subject to manual customs review, VAT imposed on the new duty, and an extra handling fee charged to the buyer upon delivery.
