Fiscal subject related
- The National e-Invoicing System (KSeF) is currently a voluntary solution for e-invoicing.
- KSeF will become mandatory by July 2024, with a deadline of January 2025 for certain taxpayers.
- This will affect B2B domestic transactions in Poland, excluding B2C transactions and invoices issued under certain schemes.
- An e-invoice is a structured invoice in XML format.
- It can be generated and sent to KSeF using a free MF web application or a commercial invoice-issuing program.
- Businesses need to notify the use of KSeF to tax authorities and create an individual account in the system.
- Buyers can access e-invoices through the MF web application or their own financial and accounting program after authentication.
- Access to the MF web application can be for production, demo, or testing purposes.
- Invoices are sent to KSeF for verification and storage and can be consulted for 10 years.
- The structure for e-invoices in KSeF differs from other electronic invoice structures in public procurement and concessions.
Other news from Poland
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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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
Poland prepares for Mandatory B2B E-Invoicing with new KSeF Tools- Certificates and Authorizations Module (MCU)
Poland
Author: Nikolina Basić
Starting February 1, 2026, Poland mandates B2B invoicing via the National e-Invoice System (KSeF). To support this, the Ministry of Finance released key tools, including the MCU for managing access and digital certificates, which are essential for KSeF 2.0 access. Starting February 1, 2026, Poland will require businesses to use the National e-Invoice System (KSeF) for B2B invoicing. To help compan... Read more
E-invoicing in Poland: Ministry of Finance launches demo version of KSeF 2.0 API
Poland
Author: Nikolina Basić
Poland’s Ministry of Finance has launched the pre-production (Demo) environment for the new KSeF 2.0 API, enabling businesses and software providers to test integrations under real authentication conditions. The demo, accessible at ksef-demo.mf.gov.pl, mirrors live system functionality without legal effects, supporting companies in preparing for mandatory e-invoicing rollout The Ministry of Financ... Read more
Regulation update in Poland: expansion of software-based cash registers
Poland
Author: Nikolina Basić
Poland has expanded the scope of businesses eligible to use software-based cash registers under amendments effective April 1, 2026. The updated regulation adds sectors such as car washes, automated delivery systems, self-service ticketing, and electronic parking services, further advancing the country’s digital tax infrastructure modernization Poland’s authorities have officially published a... Read more
New SENT system rules in Poland will cover clothing and footwear from March 2026
Poland
Author: Nikolina Basić
Starting March 17, 2026, Poland’s SENT system—which monitors road and rail transport of goods—will expand to include clothing and footwear. This change comes from a regulation issued by the Minister of Finance and Economy on September 10, 2025. The SENT system will now require reporting for shipments of: Knitted or crocheted clothing (Chapter 61 of CN) over 10 kg Non-knitted clothing (Chapter... Read more