Fiscal subject related
From 1 April 2025, all entities registered in the Polish register of entrepreneurs (KRS) will be required to use e-Delivery in correspondence with public authorities.
The meaning: each company must set up and activate an e-Delivery mailbox, appoint its administrators, and implement appropriate procedures. From that date, all correspondence between entrepreneurs and public entities, both sending and receiving letters, will generally have to be conducted via the e-Delivery system.
Moreover, since 1 January 2025, public administration bodies in Poland (including tax authorities and local government bodies) have been obliged to use the e-Delivery system.
Irregularities in e-Delivery can lead to serious consequences for companies, including missing the deadline for submitting a letter or so-called delivery fiction. e-Deliveries is a service for sending and receiving correspondence electronically, equivalent to sending a registered letter. This system will replace traditional (paper) correspondence sent by post, as well as e-correspondence sent by the ePUAP system.
This obligation will apply to both entrepreneurs registered in the National Court Register (companies and partnerships) as well as other entities conducting business activities (e.g., associations, foundations). Sending and receiving correspondence with public entities via e-Delivery will be free of charge. Entrepreneurs will also be able to use e-Deliveries for correspondence with other non-public entities (e.g., other entrepreneurs). However, this is not obligatory and will be a paid service.
It is important to state that sending a letter via the incorrect correspondence channel (e.g., ePUAP instead of e-Delivery) will result in the letter being deemed as not submitted (and all the negative consequences associated with this). After 14 days from the receipt of correspondence at the company’s e-Delivery address, the shipment will be considered delivered, even if the addressee does not open it (so-called fiction of delivery).
Other news from Poland
Who is exempt from Poland’s Mandatory e-Invoicing System (KSeF) in 2026?

Starting 1 February 2026, Poland's National e-Invoice System (KSeF) becomes mandatory, but exemptions will apply to industries where e-invoicing is impractical, such as transport, financial services, and certain cross-border transactions. A draft regulation from May 2025 allows the Minister of Finance to define these exemptions, enabling businesses in complex sectors to avoid mandatory use of KSe... Read more
Poland’s New KSeF Draft Proposes Delayed VAT Settlements for Deposit System

Poland’s latest KSeF draft, published on May 30, 2025, proposes a temporary delay in VAT settlement deadlines for businesses implementing the new deposit system for beverage packaging. Instead of reporting in January 2026, affected businesses and representatives will now declare and pay the VAT difference in February 2026, easing the administrative burden of the system’s initial rollout. In the la... Read more
Poland: Attachments to Structured Invoices in KSeF Coming January 2026

Starting January 1, 2026, businesses in Poland will be allowed to attach supporting documents—such as specifications or product details—to structured invoices submitted through the KSeF system, using the FA(3) schema. To use this feature, companies must notify the tax office via the e-Tax Office and ensure their software supports the new format, as attachments carry cybersecurity considerations an... Read more
Poland: What is Offline24 Mode in KSeF?

Offline24 Mode in Poland’s KSeF allows businesses to issue structured invoices without immediate internet access, provided they upload the invoice to the system by the next business day. This mode, becoming a permanent option from 2026, is ideal for businesses in areas with unstable connectivity and requires an official issuer certificate for use. Read more
Subscribe to get access to the latest news, documents, webinars and educations.
Already subscriber? LoginPoland's Ministry of Finance releases the KSeF 2.0 draft and important updates.

On May 30, 2025, the Polish Ministry of Finance released the KSeF 2.0 package following April's public consultations, introducing a new draft law, implementing regulations, updated thresholds, and technical guidance for the mandatory B2B e-invoicing rollout. The phased implementation begins in February 2026 for large businesses, expanding to all taxpayers by April 2026, with further obligations an... Read more
Poland expands structured e-invoicing to consumers.

Poland has expanded the National e-Invoice System (KSeF) to allow voluntary structured e-invoicing for B2C transactions, addressing long-standing business requests. Sellers can now issue consumer invoices either online through KSeF with a QR-coded PDF or offline via KSeF’s offline24 mode, without requiring consumer registration or consent. Read more
Subscribe to get access to the latest news, documents, webinars and educations.
Already subscriber? LoginPoland introduces new cash register regulation

Poland has introduced a new regulation on cash registers, effective July 1, 2025, which allows the issuance of electronic receipts (e-receipts) alongside traditional paper receipts, provided the customer consents. The regulation shortens several compliance deadlines, including reporting thefts and updating register data, and introduces clearer rules for e-receipt legibility and technical requirements. Read more