Tax Office May Now Have Your Vinted/OLX Data

5 March 2026 Poland Radar 0 Comments

New Polish rules require platforms to report seller data. Learn why selling on Vinted or OLX now matters for expats.

Sell online? New rules mean the tax office can access user data. Consequently, many casual sellers must now expect platforms to share their information. The change affects those selling on Vinted or OLX.

Table of Contents

What changed and why it matters

The government introduced reporting obligations for online marketplaces. Therefore, platforms like Vinted, OLX and Allegro must supply user and transaction data to the tax authority. Moreover, lawmakers said they want to close tax gaps and fight undeclared income. As a result, the National Revenue Administration (KAS) will receive more records. KAS stands for Krajowa Administracja Skarbowa, the Polish tax and customs authority.

How the platforms will act

Platforms must collect clearer seller details. In addition, they must forward transaction summaries to KAS. Consequently, you may see requests for identity details or proof of status. However, the platforms will not audit you. Instead, the data will allow the tax office to identify patterns of regular selling. Therefore, occasional decluttering usually stays a private matter. Nevertheless, consistent selling may trigger inquiries.

selling on Vinted or OLX: what you should know

If you sell frequently, the tax office may view your activity as business. Therefore, you could face obligations to register and report income. Moreover, you may need to account for VAT or social contributions in some cases. In addition, the tax authority can match payments, bank transfers and platform reports. As a result, undeclared earnings become easier to spot.

Poland uses identifiers such as PESEL for residents. PESEL is the national ID number. In contrast, foreigners often use an NIP or a passport number. Furthermore, ZUS covers social security and NFZ handles health insurance. ZUS and NFZ contributions can matter if authorities deem your sales as self-employment. Finally, a failure to declare taxable income can lead to a mandat, which means a fine.

Practical steps for expats

Keep clear records of what you sell. Moreover, save receipts and screenshots of listings. In addition, prefer bank transfers to cash, since banks create a payment trail. Therefore, the tax office will find it easier to verify occasional sales. If you sell regularly, consult a tax advisor. Consequently, you can learn whether to register as a sole trader. Furthermore, a local accountant can explain how residency affects tax obligations.

💡 GOOD TO KNOW: If you live in Poland as an expat, you may have to report income from online sales. Check your residency status for tax purposes and keep documentation. Also, keep your PESEL, NIP, or passport details handy. If you sell occasionally, you likely need not register as a business. However, if sales become frequent, register with the tax office and consult an accountant.

Expect platforms to update user terms and collection practices. Moreover, stay alert for email notices from Vinted, OLX or Allegro. In addition, monitor your bank statements for any matched payments. Therefore, transparency now benefits both sellers and authorities. Finally, treating online sales responsibly avoids future penalties.

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