The Polish Ministry of Finance has released new KSeF 2.0 manuals, FAQs and an updated roadmap.
These resources support businesses preparing for the mandatory e-invoicing system, which will be rolled out from February 2026.
For background, see our earlier posts on the KSeF mandate and 2.0 switch and the clarified KSeF draft regulation.
KSeF 2.0 manuals
The Ministry published four step-by-step manuals, each covering a specific part of the system:
- Part I: Getting started
Setup, registration, authentication and user rights. - Part II: Issuing and receiving invoices
FA(3) invoice structure, submission process and verification. - Part III: Additional functionalities
Attachments, OFFLINE mode, VAT RR and self-billing. - Part IV: Public sector use
Invoicing in government units, enforcement procedures and procurement.
KSeF 2.0 FAQs
A comprehensive FAQ section is now available, created with input from businesses and integrators.
It explains:
- Technical implementation
- Compliance obligations
- Authentication methods
- Functional questions about the system
For context, revisit our post on the revised KSeF draft.
KSeF 2.0 roadmap
2025
- 1 September: KSeF 1.0 test environment shutdown
- 24 September: Free KSeF training sessions start
- 30 September: KSeF 2.0 API available in test environment
- 15 October: KSeF 2.0 API available in pre-production
- 1 November: Certificate and authorisation module (MCU) launch
- 3 November: KSeF 2.0 taxpayer application available in test environment
- 15 November: KSeF 2.0 taxpayer application available in pre-production
2026
- 1 January: Notification module for invoices with attachments available in e-US platform
- 26–31 January: Technical maintenance break for KSeF 1.0 production environment
- 1 February: KSeF 2.0 live for large businesses and invoice recipients
- 1 April: KSeF 2.0 mandatory for all other businesses
2027
- 1 January: KSeF 2.0 mandatory for small businesses (up to PLN 10,000 monthly)
Why this matters
The February 2026 deadline is approaching quickly. Businesses must review these resources and align their invoicing processes with KSeF 2.0 requirements. The manuals, FAQs and roadmap give clear guidance on system setup, technical aspects and compliance obligations. Preparing early will help avoid disruptions.
For earlier milestones and policy context, see our post confirming the KSeF 2.0 switch.
Key takeaways
- Adapt invoicing processes to comply with KSeF 2.0 starting February 2026.
- Use the four manuals to guide setup, invoicing, functionalities and public sector use.
- Rely on the FAQs for technical and compliance clarity.
- Follow the roadmap milestones between September 2025 and January 2027.
- Begin preparation now to ensure a smooth transition.
