Poland’s Ministry of Finance proposes delaying the ban on using cash register invoices and the requirement to include KSeF numbers in payments until the end of 2026, while maintaining the main rollout deadlines for mandatory e-invoicing. Large taxpayers must comply by February 1, 2026, and small businesses by April 1, 2026, with no penalties for KSeF invoicing errors during the transition period.
Poland proposes a delay for parts of the mandatory e-invoicing system—invoices from cash registers?
Public
Poland
Author: Nikolina Basić
Category:
Fiscal subject related
Views:
722
Content accuracy validation date:
06.05.2025
Content accuracy validation time:
08:16h
On April 12, 2025, Poland’s Ministry of Finance submitted a legislative proposal to postpone specific requirements under the mandatory National e-Invoicing System (KSeF). The proposal suggests delaying the ban on using cash register invoices and Polish tax identification number (NIP) receipts as simplified invoices, as well as the requirement to include the KSeF number in payments.
Despite the proposed delay for certain elements, the overall rollout schedule for the KSeF system remains unchanged:
- Large taxpayers (with 2024 sales exceeding PLN 200 million, including tax) must comply by February 1, 2026.
- Small businesses and entrepreneurs (up to PLN 450 for a single invoice and PLN 10,000 in total monthly sales) are required to adopt the system by April 1, 2026.
The draft legislation ensures:
- Invoices from cash registers can still be issued until the end of 2026.
- No penalties will be applied for errors in KSeF invoicing during this period.
Providing the KSeF number in payments for e-invoices, including split payments, will not be mandatory before the end of 2026.
S
Other news from Poland
Poland to Require Mandatory Return and Disposal of Unused Cash Registers from July 2026
Public
Poland
Author: Nikolina Basić
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return all unused cash registers to manufacturers for disposal, with penalties for non-compliance to prevent misuse of outdated equipment.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
Public
Poland
Author: Nikolina Basić
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?
Public
Poland
Author: Nikolina Basić
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
Author: Dejan Šijačić
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
Subscribe to get access to the latest news, documents, webinars and educations.
Already subscriber? Login
Ministry of Finance of Poland Launched Demo of KSeF 2.0 Taxpayer Application
Public
Poland
Author: Nikolina Basić
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)
Public
Poland
Author: Nikolina Basić
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
Public
Poland
Author: Nikolina Basić
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