OSS for US Sellers: Essential EU VAT Guide 2026 Brenda Varela | usagoldmines.com

OSS for US sellers can simplify EU VAT reporting when a US ecommerce business sells goods from one EU country to private customers in other EU Member States.

However, OSS for US sellers does not eliminate every European VAT registration. If your products are stored in Germany, France, Poland, Italy or another EU country, you may still need a local VAT number and regular VAT returns there. This is particularly important for Amazon FBA and Pan-European FBA sellers, because Amazon may hold inventory in several countries.

This guide explains how OSS for US sellers works, which transactions can be reported through OSS, when local VAT registration is still required, and how Amazon, Shopify and other ecommerce sellers can build the correct EU VAT setup.

Not sure whether your US business needs OSS, local VAT registrations or both? Book a free consultation and let hellotax review your sales channels, imports and EU stock locations.

How does OSS for US sellers work?

OSS for US sellers is based on the EU One-Stop Shop, a VAT simplification scheme that allows eligible cross-border B2C sales to be reported through one quarterly return.

It allows businesses to report eligible cross-border B2C sales in several EU countries through one quarterly OSS return. Instead of registering and filing VAT returns in every country where private customers are located, the seller reports the relevant sales through one Member State of identification.

The seller must still charge the VAT rate of the customer’s country. The VAT collected is paid to the tax authority in the country where the OSS return is submitted, which then distributes it to the other EU Member States.

For a US seller, OSS can be useful after goods have entered the EU and are being sold cross-border from EU stock to private customers in other EU countries.

For example:

A US company imports stock into Germany and obtains a German VAT number.

The company sells a product from its German warehouse to a private customer in France.

French VAT applies because France is the destination country.

The French VAT can normally be reported through the seller’s Union OSS return instead of a separate French VAT return, provided the transaction meets the OSS conditions.

For official information, the European Commission’s One-Stop Shop guidance explains the scope of the scheme and the transactions that can be reported.

Which OSS scheme applies to US ecommerce sellers?

Understanding the different schemes is essential when setting up OSS for US sellers, because Union OSS, Non-Union OSS and IOSS cover different types of transactions.

Union OSS

The Union OSS covers:

• Intra-EU distance sales of goods to private customers
• Certain domestic marketplace supplies where an electronic interface is treated as the supplier
• Certain B2C services supplied by EU-established businesses

A US seller can use Union OSS for eligible goods sold cross-border from stock already located inside the EU. The seller does not need to be established in the EU to use Union OSS for qualifying intra-EU distance sales of goods.

Non-Union OSS

The Non-Union OSS is mainly for services supplied by businesses that are not established in the EU.

For example, it may apply when a US business supplies certain taxable digital or other B2C services to EU consumers.

It is not the normal OSS route for a US seller shipping physical products from an EU warehouse.

Import One-Stop Shop

The Import One-Stop Shop, or IOSS, is different from OSS. It applies to eligible goods dispatched directly from outside the EU to EU consumers in consignments with an intrinsic value of €150 or less.

If your products are shipped directly from the US to an EU customer, review our guide to IOSS for Non-EU sellers.

What transactions does OSS cover?

OSS for US sellers can generally cover eligible B2C sales where goods move from one EU Member State to a private customer in another EU Member State.

Examples include:

• Goods shipped from Germany to a private customer in France
• Goods shipped from Poland to a consumer in Spain
• Goods shipped from the Netherlands to a customer in Italy
• Cross-border B2C sales made through a Shopify store
• Eligible Amazon or eBay sales where the seller remains responsible for VAT

The seller applies the VAT rate of the destination country and includes the transaction in the quarterly OSS return.

One OSS return can include eligible sales to consumers across several EU countries, broken down by destination country and VAT rate.

What does OSS not cover?

OSS for US only covers specific transactions. It is not a complete substitute for local VAT compliance.

OSS does not normally cover:

Domestic sales

If goods are dispatched from a German warehouse to a German customer, the transaction is domestic in Germany.

It must usually be reported in the German VAT return, not the OSS return.

Stock storage

Simply storing inventory in an EU country can create a local VAT registration obligation. OSS does not report inventory or replace the VAT number required in the storage country.

Cross-border stock transfers

If your own inventory is moved from Germany to Poland, this is not a sale to a private customer. It is usually treated as a deemed intra-Community supply and acquisition that must be reported through local VAT returns.

B2B transactions

OSS is designed mainly for B2C transactions. Sales to VAT-registered business customers follow separate B2B VAT rules and may involve the reverse charge or intra-Community supply treatment.

Imports

OSS does not report the import of goods from the US into the EU. Import VAT and customs obligations must be handled separately.

Goods shipped directly from the US

Goods sent directly from the US to EU consumers are not intra-EU distance sales. Depending on the shipment value and structure, IOSS or standard import procedures may apply instead.

Does the €10,000 OSS threshold apply to US sellers?

This is one of the most important corrections for US ecommerce businesses.

The EU-wide €10,000 threshold does not generally apply to a seller established only in the United States.

The threshold is subject to specific conditions. In particular, the supplier must be established, or have its permanent address or usual residence, in only one EU Member State.

For an eligible EU-established seller below the threshold, certain cross-border B2C sales may remain taxable in the seller’s EU country of establishment unless the seller opts into destination taxation.

A US-established business does not normally benefit from this threshold merely because it holds an EU VAT number.

For OSS for US sellers, destination-country VAT therefore generally applies from the first eligible intra-EU distance sale. The seller charges the VAT rate of the EU country where the private customer is located and reports the transaction through Union OSS where applicable.

This is why US sellers should not copy OSS advice written specifically for small EU-established businesses without checking whether the threshold conditions apply to them.

Does a US seller need an EU VAT number before using OSS?

In practice, a US seller selling physical goods from EU stock will normally already need a local VAT registration in at least one country.

Common triggers include:

• Importing goods into an EU country
• Storing goods in an EU warehouse
• Using Amazon FBA
• Selling domestically from local stock
• Moving stock between EU countries

The Union OSS registration can then be connected to the seller’s EU VAT setup and used to report eligible cross-border B2C sales.

OSS reduces the need for destination-country registrations caused only by cross-border B2C sales. It does not remove registrations created by stock storage, imports or local transactions.

Our EU VAT registration guide for US sellers explains how the requirements differ across key European markets.

How OSS works for US Amazon sellers

Amazon FBA sellers must separate their transactions according to the country of dispatch, destination, customer type and marketplace VAT treatment.

Consider this example:

A US business stores inventory in Germany and Poland.

A product is shipped from Germany to a private customer in France.

That cross-border B2C sale may normally be included in the Union OSS return.

A product is shipped from Germany to a German customer.

That is a domestic German sale and must normally be included in the German VAT return.

A product is shipped from Poland to a Polish customer.

That is a domestic Polish sale and must normally be included in the Polish VAT return.

Amazon moves the seller’s stock from Germany to Poland.

That is a stock transfer, not an OSS sale. It must normally be reported through the relevant German and Polish VAT filings.

This is why Pan-European FBA sellers may need several local VAT numbers even when they use OSS.

Our guide to Amazon FBA VAT compliance explains how storage countries, stock movements, local VAT returns and OSS interact.

Does Amazon collect VAT instead of the seller?

Sometimes.

Under the EU deemed-supplier rules, an online marketplace may be treated as buying and reselling the goods for VAT purposes in certain transactions.

This can apply, for example, when an electronic interface facilitates certain supplies of goods to EU consumers by a seller not established in the EU.

Where Amazon is the deemed supplier, Amazon may be responsible for collecting and reporting VAT on the customer-facing sale.

However, this does not automatically remove every VAT obligation for the underlying seller. The seller may still need to deal with:

• Imports
• EU stock storage
• Stock transfers
• Sales not covered by the deemed-supplier rules
• Local reporting
• Transactions made through its own website
• Sales through other marketplaces

A US seller should therefore not assume that Amazon handles all European VAT simply because VAT appears at checkout.

OSS for Shopify and own-website sellers

A US business selling through Shopify or its own ecommerce website normally remains responsible for calculating, collecting and reporting VAT.

If goods are already stored inside the EU, the seller must determine:

• The country from which the goods are dispatched
• The customer’s destination country
• Whether the customer is a business or consumer
• Whether the sale is domestic or cross-border
• Which VAT rate applies
• Whether the sale belongs in OSS or a local VAT return

The checkout must apply the correct destination-country VAT rate to eligible cross-border B2C sales.

The seller must also keep transaction records that support the OSS return, including dispatch country, destination country, VAT rate, taxable amount and VAT collected.

Not sure whether your Amazon, Shopify and own-website transactions are being reported in the correct returns? Contact our VAT experts and get a practical review of your OSS and local VAT reporting.

How to register for OSS as a US seller

The registration route depends on the type of OSS scheme and the seller’s existing EU VAT setup.

For Union OSS involving goods, the seller generally registers in the appropriate Member State of identification based on the applicable OSS rules and where the goods are dispatched from.

The process usually involves:

1. Mapping all EU stock locations
2. Identifying the country or countries where local VAT registration is required
3. Separating domestic sales from intra-EU distance sales
4. Confirming whether marketplace deemed-supplier rules apply
5. Selecting the correct OSS Member State of identification
6. Completing the OSS registration
7. Configuring VAT rates at checkout
8. Preparing data for quarterly OSS returns
9. Continuing local VAT returns in every relevant storage country

A seller should not choose an OSS country only because its registration process appears easy. The selection must follow the applicable legal rules and the business’s actual sales and stock structure.

How often are OSS returns filed?

Union OSS returns are filed quarterly.

The return must include eligible transactions for the relevant quarter, normally broken down by:

• EU country of consumption
• VAT rate
• Taxable amount
• VAT due
• Country from which the goods were dispatched where relevant

An OSS return may still need to be submitted when no eligible sales were made during the quarter, depending on the seller’s registration status and applicable requirements.

OSS VAT is normally paid through the tax authority in the Member State of identification. That authority distributes the amounts to the relevant destination countries.

Local VAT returns continue separately for domestic sales, imports, stock transfers and other transactions outside the OSS scope.

What records must OSS sellers keep?

OSS users must maintain detailed records supporting the sales declared through the scheme.

Records should generally allow the tax authority to identify:

• The destination Member State
• The type of supply
• The date of the transaction
• The taxable amount
• The VAT rate applied
• The VAT amount
• Payments received
• Any adjustments or refunds
• The information used to determine where the customer belongs
• The country from which goods were dispatched

OSS records must generally be retained for ten years.

For a broader review of registrations, OSS, IOSS, invoicing and recordkeeping, use our EU VAT compliance checklist.

Common OSS mistakes made by US sellers

Applying the €10,000 threshold incorrectly

US-established sellers often read guidance written for EU businesses and assume they can apply their EU warehouse country’s VAT rate until sales exceed €10,000.

That threshold does not normally apply to a business established only in the US.

Reporting domestic sales through OSS

Sales from German stock to German customers belong in the German VAT return, not the OSS return.

Ignoring stock transfers

Amazon stock movements between EU countries can create reportable deemed supplies and acquisitions.

Assuming OSS replaces all local VAT registrations

OSS replaces some destination-country registrations for eligible cross-border B2C sales. It does not replace registrations caused by storage, imports or domestic sales.

Mixing B2B and B2C sales

B2B transactions are outside the normal scope of OSS and need separate VAT treatment.

Treating OSS and IOSS as the same scheme

OSS deals with eligible sales after goods are inside the EU. IOSS deals with eligible low-value goods imported directly to EU consumers.

Assuming marketplace VAT covers every sales channel

Amazon may be responsible for VAT on certain deemed-supplier transactions, while the seller remains responsible for Shopify, own-website or other marketplace sales.

Filing OSS but forgetting local returns

A seller with stock in Germany, France and Poland may need local VAT returns in all three countries alongside one quarterly OSS return.

Can OSS reduce the number of VAT registrations?

Yes, when used correctly.

Consider a US seller that stores all EU inventory in Germany and sells to consumers throughout the EU.

Without OSS, the seller could face destination-country VAT registrations as cross-border B2C obligations arise.

With Union OSS, the seller may be able to maintain:

• A German VAT registration for imports, storage and domestic German sales
• One quarterly OSS return for eligible cross-border B2C sales to consumers in other EU countries

However, if the seller later activates Pan-European FBA and Amazon stores goods in Poland, France and Italy, local registrations may also become necessary in those storage countries.

OSS therefore simplifies customer-country reporting. It does not neutralise the VAT impact of a multi-country fulfilment network.

OSS, fiscal representation and US sellers

Fiscal representation is separate from OSS.

Some EU countries may require a non-EU business to appoint a fiscal representative for local VAT registration. Other countries allow certain non-EU sellers to register directly or apply different requirements depending on treaties and local rules.

Whether fiscal representation is needed depends on:

• The country of registration
• The seller’s country of establishment
• The type of transactions
• Import arrangements
• Local VAT legislation
• Any guarantee requirements

Using OSS does not automatically remove fiscal-representation requirements connected to local VAT registrations.

For a current country-by-country overview, read our guide to EU VAT registration for US sellers.

OSS compliance checklist for US ecommerce sellers

Before registering or filing, confirm:

• Where is my inventory physically stored?
• In which countries do I import goods?
• Which sales are domestic?
• Which sales are cross-border B2C transactions?
• Which customers are VAT-registered businesses?
• Does Amazon act as deemed supplier for any transactions?
• Which sales are made through my own website?
• Am I applying destination-country VAT rates correctly?
• Do I need local VAT registrations in storage countries?
• Have all stock transfers been reported?
• Are local sales excluded from the OSS return?
• Are eligible cross-border B2C sales included in OSS?
• Can my transaction data support a tax authority review?
• Are my OSS and local VAT returns reconciled?

How hellotax supports OSS for US sellers

OSS for US sellers becomes complicated when a business combines Amazon FBA, Shopify, EU imports, multiple stock locations and local VAT returns.

hellotax can help online sellers:

• Map EU stock and sales flows
• Identify required local VAT registrations
• Register for OSS where appropriate
• Prepare and submit OSS returns
• Manage local VAT returns
• Review Amazon FBA stock movements
• Separate domestic, B2B and cross-border B2C transactions
• Take over existing VAT registrations
• Communicate with local tax authorities
• Review missed or incorrect filing periods

The objective is to create one coordinated VAT setup rather than managing OSS and every local registration separately.

Book a free consultation and let hellotax map which registrations and VAT returns your US ecommerce business actually needs.

Frequently asked questions about OSS for US sellers

Can US sellers register for OSS?

Yes. A US seller can use the relevant OSS scheme when it makes qualifying transactions. For physical goods already located in the EU and sold cross-border to EU consumers, the Union OSS is normally the relevant scheme.

Does the €10,000 OSS threshold apply to US sellers?

Generally, no. The threshold is subject to conditions that include the supplier being established in only one EU Member State. A business established only in the US does not normally benefit from it merely because it has an EU VAT number.

Does OSS remove the need for EU VAT registration?

No. OSS can reduce the need for registrations caused only by cross-border B2C sales. It does not replace registrations required because goods are imported, stored or sold domestically in an EU country.

Can Amazon FBA sellers use OSS?

Yes. Amazon FBA sellers can use OSS for eligible cross-border B2C sales. However, they still normally need local VAT registrations in every country where Amazon stores their inventory.

Does OSS cover domestic Amazon sales?

No. If goods are shipped from a warehouse to a customer in the same country, the sale is domestic and must normally be reported in that country’s local VAT return.

Does OSS cover stock transfers?

No. Moving your own stock between EU countries is not a B2C sale and cannot be reported through OSS. The movement usually needs to be reported in the local VAT returns of the departure and destination countries.

Does OSS cover sales from the US directly to EU customers?

No. Goods shipped directly from the US are imports, not intra-EU distance sales. IOSS may apply to eligible consignments worth €150 or less. Other imports follow standard customs and import VAT procedures.

What is the difference between OSS and IOSS?

OSS generally covers eligible cross-border B2C sales within the EU after goods are already located in the EU. IOSS covers eligible low-value goods dispatched from outside the EU directly to EU consumers.

Does OSS apply to the UK or Switzerland?

No. The UK and Switzerland are outside the EU VAT area. Sales there follow separate national VAT and import rules.

Do US sellers need a fiscal representative to use OSS?

Fiscal representation requirements depend on the local VAT registrations involved and the rules of the relevant country. OSS itself does not create one uniform EU fiscal-representation rule.

How often do US sellers file OSS returns?

Union OSS returns are filed quarterly. Local VAT returns may be monthly, quarterly or annual depending on the relevant country and registration.

Can hellotax help US sellers with OSS?

Yes. hellotax can review sales and stock flows, identify required local registrations, support OSS registration and reporting, and coordinate ongoing VAT filings across relevant European countries.

Conclusion: is OSS right for your US ecommerce business?

OSS for US sellers can significantly simplify European VAT reporting, but only when it is used for the correct transactions.

It can help a US business report eligible cross-border B2C sales through one quarterly return instead of maintaining VAT registrations in every customer country.

However, OSS does not cover:

• Domestic sales
• Imports
• Stock transfers
• B2B sales
• Goods shipped directly from the US
• Local VAT obligations created by EU warehouse storage

For Amazon FBA and Pan-European FBA sellers, the most important step is mapping where inventory is held. Every storage country may create a local VAT registration and filing requirement, while OSS covers only the eligible cross-border B2C sales between those countries.

A correct setup may therefore include several local VAT returns plus one quarterly OSS return.

Not sure whether your current setup includes unnecessary registrations, missing VAT numbers or incorrectly reported OSS sales?

Book a free consultation and get a practical EU VAT assessment for your Amazon, Shopify or ecommerce business.