Poland is preparing to launch a new version of its e-invoicing platform, KSeF 2.0, with a test environment becoming available in September 2025. This transition follows the recent signing of new e-invoicing legislation and is set to officially launch for businesses on February 1, 2026, with a later date for smaller companies.
Poland to Launch KSeF 2.0 Test Environment in September ahead of full rollout in 2026 and officaly adoption of E-invoice legislation
Public
Poland
Author: Nikolina Basić
Category:
Fiscal subject related
Views:
3490
Content accuracy validation date:
03.09.2025
Content accuracy validation time:
11:21h
E-invoicing in Poland: as of 1st September, the test version of the National e-Invoice System (KSeF) 1.0 has been officially deactivated, paving the way for the launch of KSeF 2.0, the next-generation platform designed to improve invoice processing and integration with commercial accounting systems.
Transition Timeline:
· September 1, 2025: KSeF 1.0 test environment deactivated. New users must wait for access to the KSeF 2.0 test system.
· September 30, 2025: Open testing of the KSeF 2.0 API begins, allowing software providers to evaluate system compatibility.
· October 15, 2025: Users can begin integrating with the pre-production (DEMO) environment via the new API.
· January 26–31, 2026: Scheduled maintenance break for the current production system.
· February 1, 2026: Official launch of the KSeF 2.0 production system.
KSeF 2.0 introduces improved capabilities for exchanging data between the national platform and third-party invoicing systems. The new API is designed to streamline integration, improve security, and support broader adoption across Poland’s financial and business sectors.
The Ministry has already published the full API documentation to assist developers and integrators in preparing for the transition. It is available at:
https://ksef.podatki.gov.pl//ksef-na-okres-obligatoryjny/wsparcie-dla-integratorow/
Also, it is important to mention that the Polish president on 27 August 2025 signed and completed the adoption of the KSeF e-invoicing amending legislation. The legislation, which amends the VAT Act, will be shortly published in the official SEJM as the final step.
This sets the launch date for phase one of the Polish e-invoicing mandate for 1 February 2026. Smaller companies join the mandate on 1 April 2026.
Other news from Poland
Poland extends fuel VAT cut to Mid-May
Public
Poland
Author: Nikolina Basić
Poland
Author: Nikolina Basić
The Polish government has extended VAT rate reductions on specific fuel products until May 15, 2026, formalized by Regulation No. 573. This aims to alleviate high energy costs for consumers and businesses, following prior efforts to stabilize the fuel market. The Polish government has officially extended the temporary reduction of VAT rates on specific fuel products. Originally set to expire at th... Read more
E-inovicing (KseF) penalty rules before 2027 in Poland
Public
Poland
Author: Nikolina Basić
Poland
Author: Nikolina Basić
Poland’s Ministry of Finance acknowledged a technical error in tax regulations that could penalize businesses for lawful invoice issuance during system crashes. They clarified no fines for paper or PDF invoices during total failures, promising amendments by January 2027. The Ministry of Finance of Poland has officially acknowledged a technical error in upcoming tax regulations that could have unfa... Read more
VAT Register Rules and E-invoicing (KseF) Transition
Public
Poland
Author: Nikolina Basić
Poland
Author: Nikolina Basić
Poland’s VAT Act requires businesses to record invoices individually with the contractor’s NIP in VAT registers, while fiscal receipts can serve as simplified invoices only if they include the buyer’s VAT number. Under transitional rules, such receipts are allowed outside the National e-Invoicing System (KSeF) until the end of 2026, after which all simplified invoices must be issued through KSeF f... Read more
Poland expands cash register exemptions
Public
Poland
Author: Nikolina Basić
Poland
Author: Nikolina Basić
As of 31 March 2026, Poland introduced amendments to its cash register exemption rules, granting relief to housing cooperatives, housing communities, and operators of non-electric vending machines by exempting certain parking services and mechanically operated sales from fiscalization obligations. While parking services are generally subject to mandatory fiscalization from April 2026, exemptions... Read more
Poland cuts fuel VAT
Public
Poland
Author: Nikolina Basić
Poland
Author: Nikolina Basić
Poland will temporarily reduce fuel VAT from 21% to 8% between 6 and 30 April 2026—alongside lowering duties and maintaining price control measures—to mitigate rising fuel costs driven by global oil price increases Poland has announced a temporary cut in fuel VAT to ease inflation pressures linked to rising oil prices and the ongoing Iran conflict. On 26 March 2026, Prime Minister Donald Tusk con... Read more
Consumer Invoices and E-invoicing (KseF) in Poland: what changes in 2026?
Public
Poland
Author: Nikolina Basić
Poland
Author: Nikolina Basić
From April 1, 2026, invoices issued to consumers under the Polish KSeF system will remain largely unchanged, as businesses are still not required to issue them unless requested and can continue using paper or electronic formats outside KSeF. Although sellers may voluntarily issue consumer invoices through KSeF (with QR code verification), the system remains mandatory only for B2B transactions, mea... Read more
Ministry of Finance of Poland: Penalties for E-invoice (KseF) errors will be proportional.
Public
Poland
Author: Nikolina Basić
Poland
Author: Nikolina Basić
The Polish Ministry of Finance has announced that penalties related to the mandatory National e-Invoicing System (KSeF) will be applied with flexibility and proportionality. While KSeF becomes mandatory in 2026, financial sanctions will only begin on January 1, 2027, with 2026 serving as a transition period for businesses to adapt, and penalties thereafter assessed case-by-case depending on the se... Read more