General subject related
Key highlights include:
- Implementation Dates Confirmed: KSeF will be implemented on February 1st and April 1st, 2026.
- Schema Updates: Changes to the e-invoice schema are planned, with a new schema set to be published in September.
- Voluntary Attachments: A proposal has been made to introduce voluntary attachments to e-invoices, allowing for the inclusion of complex data and business-relevant information.
- Offline Mode Maintained: The option to issue e-invoices offline, outside of KSeF, will be retained.
- Proposal Withdrawal: The proposal for “self-identification” of buyers for income tax purposes has been withdrawn.
- Paper Invoices for Small Taxpayers: During the transitional period, the smallest taxpayers will be temporarily allowed to issue paper invoices.
- Testing Environments: Efforts are underway to align test and production environments to facilitate the testing of new solutions.
- New Regulations: A new regulations project will be presented in the fall, followed by public consultations.
While some areas still require clarification, stakeholders are encouraged to continue proactive preparations for KSeF implementation to minimize delays and risks.
Other news from Poland
KseF 2.0: Important Deadlines for Polish Retailers
Poland
Author: Tara Nedeljković
Although KSeF 2.0 is primarily a B2B system, it introduces major changes for B2C retailers by requiring all VAT taxpayers to receive invoices via KSeF from February 2026 and progressively mandating invoice issuance through KSeF for retailers from April 2026. From 1 January 2027, cash register receipts with a buyer’s NIP will be prohibited, making KSeF the mandatory channel for such consumer invoic... Read more
Poland Launches Public Consultation on Permanent Establishment Rules for Mandatory KSeF E-Invoicing
Poland
Author: Tara Nedeljković
Poland’s Ministry of Finance has launched public consultations on draft tax clarifications defining when a permanent establishment in Poland is sufficiently involved in transactions to trigger e-invoicing obligations under the KSeF system. Read more
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Already subscriber? LoginPoland to Require Mandatory Return and Disposal of Unused Cash Registers from July 2026
Poland
Author: Nikolina Basić
Poland’s Ministry of Finance plans targeted VAT Act amendments effective July 1, 2026, introducing stricter rules for handling fiscal devices. Businesses will be required to deregister and return all unused cash registers to manufacturers for disposal, with penalties for non-compliance to prevent misuse of outdated equipment. The Ministry of Finance has announced a focused set of amendments to the... Read more
Poland Sets 2027 Deadline: Simplified Invoices Must Move from Cash Registers to KSeF
Poland
Author: Nikolina Basić
Poland will temporarily allow simplified invoices issued from cash registers—including receipts with a buyer’s NIP—to remain outside the mandatory KSeF system until 31 December 2026. Starting 1 January 2027, all simplified invoices must be issued through KSeF, ending the option to generate them directly from cash registers. The introduction of the National e-Invoicing System (KSeF) in Poland is co... Read more
Pro Forma Invoices and E-invoicing: what changes after February 1, 2026?
Poland
Author: Nikolina Basić
Pro forma invoices will continue to be allowed as non-tax, purely informational business documents, but they will not be issued or processed in KSeF because they are not recognized as invoices under the VAT Act. From 2026 onwards, only legally defined VAT invoices will pass through KSeF, while pro formas may still be shared externally (PDF, email, systems) as offer or preview documents. For many y... Read more
New document was uploaded: S4F backoffice installer
S4F backoffice installer is intended for users who are installing the software for the first time. Please make sure to obtain latest version of installer and to apply all subsequent patches that are released subsequently. This package contains instruction, release notes, changelog and software packages required for deployment of this software component. This version of the Backoffice installer supports the following countries: Austria, Bulgaria, Croatia, France, Italy, Poland, Portugal, Romania, Slovakia and Slovenia. Read more
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Already subscriber? LoginMinistry of Finance of Poland Launched Demo of KSeF 2.0 Taxpayer Application
Poland
Author: Nikolina Basić
On November 15, 2025, the Polish Ministry of Finance released the KSeF 2.0 Taxpayer Application demo for testing before its February 1, 2026, launch. Users can issue and manage invoices in a simulated environment. On November 15, 2025, the pre-production environment (Demo) of the KSeF 2.0 Taxpayer Application was made available by Polish Ministry of Finance. The demo version allows users to test t... Read more