Poland E-Invoicing
Polska ยท KSeF (FA_VAT)
Poland launched the mandatory KSeF (Krajowy System e-Faktur) in February 2026 for large taxpayers, extending to all VAT-registered businesses in April 2026. All B2B and B2G invoices must pass through the government KSeF platform and receive a unique KSeF reference number.
Legal basis: Ustawa o KSeF (Act on KSeF), Dz.U. 2021 poz. 1598 ยท Ministerstwo Finansรณw โ
B2B e-invoicing has been mandatory in Poland since February 2026.
All businesses must be able to receive structured e-invoices. Check the regulations for your sending obligations.
Explore Poland E-Invoicing
๐ Regulations
Laws, mandates, exemptions, penalties
๐ Formats
XRechnung, ZUGFeRD, Peppol BIS, and more
๐ป Software
Comparisons, reviews, and recommendations
๐ง Implementation
Step-by-step guides and best practices
๐ข Providers
Peppol access points, EDI, BPO
๐ฐ Updates
Latest news and regulatory changes
Poland E-Invoicing Timeline
KSeF launched as voluntary system
The Polish government launched the Krajowy System e-Faktur (KSeF) on a voluntary basis, allowing businesses to issue FA_VAT structured invoices and receive a KSeF reference number. Voluntary adoption begins.
B2G e-invoicing mandatory (public procurement)
Electronic invoicing becomes mandatory for invoices submitted under public procurement contracts above EU thresholds. Suppliers must send structured e-invoices via the PEF (Platforma Elektronicznego Fakturowania) system.
Mandatory KSeF postponed โ cybersecurity audit failure
The Ministry of Finance announced a postponement of the originally planned July 2024 mandatory KSeF date following a critical cybersecurity audit that found vulnerabilities in the KSeF platform. A new timeline was to be announced after remediation.
KSeF Act amended โ new mandatory dates confirmed
The Polish parliament enacted amendments to the KSeF Act setting new mandatory dates: 1 February 2026 for large taxpayers (annual turnover >PLN 200 million) and 1 April 2026 for all remaining VAT-registered businesses.
KSeF mandatory โ large taxpayers (>PLN 200M turnover)
Mandatory KSeF kicks in for large taxpayers with annual turnover exceeding PLN 200 million. All B2B and B2G VAT invoices must be issued through KSeF and carry a unique KSeF reference number. Non-compliant invoices risk VAT deduction rejection.
KSeF mandatory โ all VAT-registered businesses
Full mandate: every business registered for VAT in Poland must issue all domestic B2B invoices through KSeF. Paper and PDF invoices no longer have legal standing for VAT purposes. KSeF reference number is required on every invoice.
Top E-Invoicing Software for Poland
View all โ| Provider | Rating | Pricing | ksef_fa_vat | Peppol BIS | Free Trial | Best For | |
|---|---|---|---|---|---|---|---|
| โ โ โ โ ยฝ4.5 | โฌ0.1/mo | โ | โ | โ | smbmidmarketenterprise | Start Free โ | |
C Comarch ERP Optimaโ Verified | โ โ โ โ โ4.4 | โฌ149/mo | โ | โ | โ | smbmidmarket | Request Demo โ |
I InsERT nexoโ Verified | โ โ โ โ โ4.4 | โฌ89/mo | โ | โฏ | โ | freelancersmb | Try Free โ |
| โ โ โ โ โ4.3 | โฌ199/mo | โ | โ | โ | smbmidmarketenterprise | Get Demo โ | |
| โ โ โ โ โ4.3 | โฌ149/mo | โ | โ | โ | smbmidmarket | Get Demo โ |
Comparison data last verified: May 2026. Some links are affiliate links โ see our editorial policy.
Latest Articles
Sage Symfonia KSeF Review 2026: Poland E-Invoicing for SMEs
Detailed review of Sage Symfonia's KSeF integration for Polish businesses in 2026. Covers FA_VAT 2.0 support, token management, pricing, and how it compares to Comarch and InsERT nexo.
Sage Symfonia KSeF Review: Is It Ready for Poland's E-Invoicing Mandate?
Honest review of Sage Symfonia's KSeF compliance features for 2026. FA(2) support, offline mode, pricing, and how it compares to Comarch ERP Optima and InsERT nexo.
KSeF Corrective Invoice Guide: How to Issue Faktura Korygujฤ ca in 2026
Step-by-step guide to issuing corrective invoices (Faktura Korygujฤ ca) in Poland's KSeF system in 2026. Covers KSeF reference requirements, pre-KSeF corrections, and FA_VAT 2.0 schema.
Comarch ERP Optima KSeF Review 2026: Poland's Market Leader Tested
Hands-on Comarch ERP Optima review for KSeF compliance in Poland. FA_VAT generation, KSeF API integration, offline mode, and pricing. Used by 80,000+ Polish businesses.
InsERT nexo KSeF Review 2026: Best E-Invoicing Software for Polish Freelancers and SMEs
Hands-on InsERT nexo review for KSeF compliance. Clean interface, offline mode, JPK_VAT integration, pricing, and how it compares to Comarch for Polish freelancers and small businesses.
KSeF API Developer Guide 2026: How to Integrate with Poland's E-Invoicing System
Complete developer guide to the KSeF API in Poland. Authentication, FA_VAT XML generation, invoice submission, status polling, offline mode handling, and testing environment setup.