- Poland’s Ministry of Finance released the final FA3 invoice schema and KSeF API 2.0 documentation on June 30, 2025
- KSeF platform is set for full implementation in February 2026
- Mandatory e-invoicing starts February 1, 2026, for businesses with sales over PLN 200M
- From April 1, 2026, smaller businesses must use the e-invoicing system
- Businesses with monthly revenue under PLN 10,000 can switch to e-invoicing by December 31, 2026
- Penalty-free grace period ends December 31, 2026
- Mobile version of the Taxpayer Application to be released in November 2025
- KSeF is Poland’s national e-invoicing platform for structured electronic invoices
- KSeF functions include accepting XML invoices, applying IDs and timestamps, and 10-year archiving
- Mandatory for B2B domestic transactions involving companies in Poland or with a fixed establishment
- Paper or PDF invoices will not be compliant after the deadline
- Key dates include June 30, 2025, for schema release and February 1, 2026, for mandatory e-invoicing for large businesses
Source: globalvatcompliance.com
Note that this post was (partially) written with the help of AI. It is always useful to review the original source material, and where needed to obtain (local) advice from a specialist.
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