Guide · VAT

VAT OSS in 2026 - how to account for sales to the EU in e-commerce

Updated: · 7 min read · By Agnieszka Saladra, Certified Accountant

Do you sell goods to consumers from other European Union countries and do not know where to account for VAT? We explain what the VAT OSS procedure is, when the EUR 10,000 threshold appears, and how the quarterly returns work. We also show how Luno-Group handles these settlements for you.

In short

  • Once you exceed the EUR 10,000 threshold (PLN 42,000) of total sales to consumers in the EU, you account for VAT at the buyer's country rates.
  • VAT OSS lets you account for sales to all EU countries in a single registration and a single return, instead of registering in each country separately.
  • You file OSS returns quarterly on the VIU-DO form, by the end of the month following the quarter - all amounts in euros.
  • OSS applies to the sale of goods within the EU, while IOSS applies to the import of consignments from outside the EU worth up to EUR 150.
  • Platforms such as Allegro or Amazon can be a 'deemed supplier', in which case they account for VAT on some of the transactions.

What VAT OSS is and what problem it solves

VAT OSS (One Stop Shop) is an EU procedure that simplifies accounting for VAT on the sale of goods and certain services to consumers from other European Union countries. Instead of registering for VAT in every country you ship parcels to, you account for everything in one place - through the Polish tax office.

Selling goods shipped to consumers in other EU countries is, in the regulations, intra-Community distance sales of goods (WSTO). As a rule, VAT on such sales is due to the country where the buyer lives. Without OSS, this would mean having to register and file returns in each of these countries separately - a costly and time-consuming obligation.

OSS solves this problem: a single registration, a single quarterly return, and a single payment cover sales to all EU countries. That is why the procedure is so popular in e-commerce.

The EUR 10,000 threshold - when you start accounting for VAT abroad

The key figure is the EUR 10,000 threshold (PLN 42,000) of total annual sales to consumers across all EU countries - counted together, not separately for each country. It covers the value of distance sales of goods and of all telecommunications, broadcasting and electronic services (TBE) provided to consumers from other EU countries, in amounts net of tax.

As long as you do not exceed this amount, you may tax sales to other EU countries with Polish VAT - just like domestic sales. This is a convenient solution for smaller shops that are only beginning to sell abroad.

What exceeding the threshold changes

  • From the moment you exceed EUR 10,000, you apply the VAT rates of the buyer's country, not Polish ones.
  • You then have two paths: registering for VAT in each country of sale separately, or using the OSS procedure.
  • You count the threshold jointly for WSTO sales of goods and TBE services across the whole EU - summing up all countries.
  • You can also use OSS voluntarily, even before exceeding the threshold, if you know in advance that foreign sales will grow.

It is worth keeping track of this threshold during the year, because you need to register for OSS sufficiently early. If you exceed the limit without registering, some of the sales will have to be accounted for in the buyer's country under general rules. Ongoing turnover monitoring in online accounting helps a great deal here.

Registering for VAT OSS - step by step

In Poland, you register for the EU OSS procedure electronically by filing the VIU-R form. You submit the application through the Ministry of Finance (the e-Tax Office, the podatki.gov.pl portal), with no visit to the office. The country of identification for a Polish entrepreneur is Poland.

  • A VIU-R application sent through the e-Tax Office does not require a qualified electronic signature - you log in with, among others, a Trusted Profile (profil zaufany). A qualified signature is only needed when filing through the e-Deklaracje channel.
  • After registration, you receive confirmation of participation in the OSS procedure.
  • It is worth registering before you exceed the EUR 10,000 threshold, so that you account for VAT through OSS from the very first foreign transaction.
  • The decision to use OSS is voluntary - the alternative is registering for VAT in the individual EU countries.

Registration itself is only the beginning - next come quarterly returns and the obligation to apply the correct rates for each country. This is a stage where it is easy to make a mistake, which is why running OSS is worth entrusting to an experienced accountant.

Quarterly VIU-DO returns and buyer-country rates

Under the OSS procedure, you account for VAT on the basis of the quarterly VIU-DO return. You file it by the end of the month following the quarter - the deadline does not shift even when the last day falls on a Saturday or public holiday.

  • You file the VIU-DO return for each quarter separately, even when there were no sales in a given period (a nil return).
  • In the return, you report sales to each EU country at that country's VAT rates.
  • You state all amounts in euros, and you pay the tax in a single transfer for the whole quarter.
  • VAT rates differ between countries, so the records must assign each transaction to the correct country and rate.

This is the greatest challenge of OSS: you have to correctly determine the VAT rate applicable in the buyer's country for a given product. Rates vary and change regularly. We prepare and file VIU-DO returns, keep the required records, and watch the deadlines - while decisions about the sales model remain on your side.

OSS versus IOSS - how import from outside the EU differs

OSS and IOSS are two different procedures, although both simplify VAT accounting in cross-border sales. The difference lies in where the goods come from.

  • OSS covers the sale of goods already located in the EU, shipped to consumers in other EU countries (WSTO). Returns are quarterly.
  • IOSS (Import One Stop Shop) applies to the distance sale of goods imported from outside the EU in consignments worth up to EUR 150. Returns are monthly.
  • Under IOSS, you collect VAT from the consumer at the time of purchase, and the import of such a consignment is exempt from import VAT - the customer pays no additional tax on delivery.
  • Above EUR 150, IOSS does not apply - the standard import rules apply, with VAT and possible customs duty.

The monthly rhythm of IOSS fits well with models that have a large number of small orders, typical among other things of some dropshipping. The choice between the procedures depends on where your goods are located at the time of sale - we will show you how each one works, and you make the decision with full understanding.

Who OSS applies to - shops and sales platforms

OSS applies primarily to online shops and entrepreneurs who ship goods to consumers (B2C sales) in other EU countries and have exceeded the EUR 10,000 threshold. The procedure is voluntary, but for most sellers it is far more convenient than multiple registrations abroad.

Selling through platforms (marketplaces)

If you sell through a platform such as Allegro, Amazon, or Etsy, in some situations the platform becomes a deemed supplier and accounts for VAT on some of the B2C transactions itself. This does not, however, release you from your own obligations - you still have to correctly record the remaining sales and understand which transactions the platform accounts for and which you account for.

Importantly, OSS does not replace local VAT registration where you store goods (e.g. using FBA models) or carry out domestic sales in a given country. In practice, for many sellers this works out as a mix: local registrations plus OSS for qualifying cross-border sales. This situation is worth analysing individually.

How Luno-Group handles OSS settlements

Cross-border sales in e-commerce is an area where a costly mistake is easy to make - from missing the threshold, through an incorrect VAT rate for a given country, to a late return. Each of these errors can mean tax arrears abroad.

  • we monitor your sales to the EU and inform you as you approach the EUR 10,000 threshold,
  • we prepare and file the VIU-R registration application for the OSS procedure,
  • we keep sales records broken down by country and the correct VAT rates,
  • we prepare and submit quarterly VIU-DO returns and watch the payment deadlines,
  • we explain the differences between OSS, IOSS, and selling through platforms in your specific model.

At Luno-Group, an experienced accountant looks after your settlements, not an app alone. We combine the convenience of online accounting with real human support from someone who knows the regulations and will answer your questions - in Polish or in English.

Frequently asked questions

What is the sales threshold for VAT OSS?+

The threshold is EUR 10,000 (PLN 42,000) of total annual distance sales of goods and telecommunications, broadcasting and electronic services (TBE) to consumers across all EU countries, counted together and net of tax. Once you exceed it, you account for VAT at the buyer's country rates - through the OSS procedure or by registering for VAT in the individual countries.

How do you register for VAT OSS in Poland?+

You register electronically by filing the VIU-R form through the e-Tax Office on the podatki.gov.pl portal. An application filed through this channel is sealed with the seal of the Head of the National Revenue Administration (KAS) and does not require a qualified electronic signature - a qualified signature is only needed when filing through the e-Deklaracje channel. After registration you receive confirmation of participation in the procedure.

How often do you file VAT OSS returns?+

You file the OSS return (VIU-DO) quarterly, by the end of the month following the quarter. The deadline does not shift when it falls on a non-working day. You report all amounts in euros, and you pay the VAT for the whole quarter in a single transfer - including when there were no sales.

How does OSS differ from IOSS?+

OSS covers the sale of goods located in the EU, shipped to consumers in other EU countries, with quarterly returns. IOSS applies to the import of goods from outside the EU in consignments up to EUR 150, with monthly returns and VAT collected from the customer already at purchase.

Do I have to register for OSS when selling through Allegro or Amazon?+

It depends. In some situations the platform becomes a deemed supplier and accounts for VAT on some of the B2C transactions itself. This does not, however, release you from your own obligations on the remaining sales or from local registration where you store goods. Each model is worth analysing separately.

Can I join OSS before exceeding the threshold?+

Yes, using OSS is voluntary and you can register even before exceeding EUR 10,000. This can be convenient when you know in advance that foreign sales will grow - from the start you then account for VAT at the buyer's country rates through a single return.