IOSS: What Is It and Why Does It Affect Your Customs Clearance?
Online purchases from retailers outside the European Union have increased significantly in recent years. At the same time, the procedures governing the collection and payment of VAT on imported goods have evolved considerably.
Within this framework, the Import One Stop Shop (IOSS) has become one of the most important mechanisms affecting the customs clearance of low-value shipments entering the European Union.
Although many consumers encounter IOSS during the checkout process when shopping online, few fully understand what it is and how it impacts customs procedures.
What Is IOSS?
The Import One Stop Shop (IOSS) is a special VAT scheme designed for distance sales of goods shipped from non-EU countries to consumers within the European Union.
Under this system, VAT is collected at the point of sale by the seller or online marketplace and subsequently remitted to the relevant tax authorities through a centralized process.
In practical terms, consumers pay the applicable VAT during checkout rather than upon the arrival of the shipment in the destination country.
Why Was IOSS Introduced?
Before the implementation of IOSS, low-value shipments arriving from outside the European Union often created challenges for both consumers and customs authorities.
Recipients were frequently required to pay VAT and administrative fees upon delivery, often without knowing the final cost of their purchase in advance.
At the same time, customs authorities were tasked with processing a vast number of small consignments that required individual VAT assessments.
IOSS was introduced to:
✔ increase transparency in VAT collection
✔ simplify import procedures
✔ reduce customs-related delays
✔ improve the overall customer experience
Which Shipments Are Covered by IOSS?
The IOSS scheme applies to goods that:
✔ are shipped from a country outside the European Union
✔ are sold to private consumers within the EU
✔ have a total value of up to €150
For shipments exceeding €150, standard import procedures, customs clearance requirements, and applicable customs duties continue to apply.
How Does IOSS Work in Practice?
Let us consider a consumer in Greece purchasing a product from an online retailer located outside the European Union.
If the seller participates in the IOSS scheme:
✔ VAT is calculated and charged at checkout
✔ the buyer knows the final cost before completing the purchase
✔ the shipment is accompanied by the required electronic customs data
✔ customs authorities can process the shipment more efficiently upon arrival
This does not mean that the shipment bypasses customs controls. Rather, it means that a significant part of the VAT collection process has already been completed before the goods enter the European Union.
What Are the Benefits of IOSS?
For Consumers
The primary benefit is cost transparency.
Consumers know in advance:
✔ the value of the goods
✔ the amount of VAT charged
✔ the total amount payable
This significantly reduces the likelihood of unexpected charges upon delivery.
For Customs Procedures
The electronic transmission of shipment data allows for:
✔ faster processing of consignments
✔ more efficient customs controls
✔ reduced administrative delays
For E-Commerce Businesses
Businesses that use IOSS can provide a smoother purchasing experience by ensuring that customers are fully informed about VAT costs before completing their purchase.
What Happens When IOSS Is Not Used?
When a shipment is not covered by the IOSS scheme, VAT is generally collected at the point of importation.
In such cases, additional requirements may arise, including:
✔ further customs clearance procedures
✔ administrative handling by the carrier or courier
✔ additional processing time before delivery
This is one of the main reasons why two seemingly similar orders may have different delivery experiences or clearance timelines.
Why Might VAT Be Requested Again If It Has Already Been Paid?
This is one of the most common questions raised by online shoppers.
In most cases, this occurs when:
✔ the IOSS number has not been transmitted correctly
✔ shipment information is incomplete
✔ the required electronic customs declaration has not been submitted properly
Under these circumstances, customs authorities or carriers may request additional supporting documents to verify that VAT has already been paid.
For this reason, consumers should retain all purchase receipts and payment confirmations until the shipment has been successfully delivered.
Does IOSS Eliminate Customs Clearance?
In short, no.
IOSS does not replace or eliminate customs controls.
Shipments remain subject to customs procedures and inspections upon entry into the European Union.
The key difference is that VAT has already been collected and declared through the IOSS system, helping to streamline and accelerate the overall clearance process.
Conclusion
The Import One Stop Shop (IOSS) has become a key component of low-value import management within the European Union.
Its implementation has significantly improved transparency in VAT collection, enhanced the customer experience, and contributed to more efficient customs procedures.
While IOSS does not eliminate customs clearance requirements, it simplifies the importation process for low-value shipments and helps reduce delays and unexpected charges.
For both consumers and businesses involved in cross-border e-commerce, understanding how IOSS works is now an essential part of managing international purchases and imports effectively.
About APS
APS is a Greek customs clearance and freight forwarding company headquartered at Athens International Airport “Eleftherios Venizelos”.
We specialize in:
➔ import and export customs clearance
➔ international freight transportation
➔ worldwide express shipments
➔ customs procedures for e-commerce businesses
With ISO 9001 and AEO certifications and more than 45 years of industry experience, APS provides comprehensive customs clearance and freight forwarding solutions with reliability, consistency, and expertise.
APS Team
June 2026