KSeF Integration
for Polish Businesses
Invoice Guru integrates directly with Poland's National e-Invoice System (KSeF). Send KSeF-compliant invoices from your phone — no separate software or portal required.
What Is KSeF?
Poland's mandatory national system for electronic invoice exchange.
KSeF Explained
KSeF (Krajowy System e-Faktur, meaning National e-Invoice System) is a centralised platform operated by the Polish Ministry of Finance (Ministerstwo Finansów). All B2B invoices issued by VAT-registered Polish businesses must be submitted to KSeF.
The system receives, processes, and stores invoices in a standardised XML format called Faktura Ustrukturyzowana (FA), replacing traditional paper and PDF invoices for registered businesses.
Why It Matters
- Mandatory for all VAT-payers from April 2026
- Penalties for non-compliance from the Polish Tax Office
- Invoices not submitted to KSeF are legally invalid for B2B
- Faster VAT refund processing for compliant businesses
- Real-time tax authority visibility into business transactions
- Eliminates need for paper or PDF invoice archiving
How Invoice Guru Integrates
Full KSeF compliance built into every invoice you create.
Direct KSeF Submission
Send invoices directly to the KSeF system without leaving the app. No manual file export or upload required.
Structured FA(2) Format
All invoices are automatically generated in the required XML FA(2) schema format, fully compliant with Ministry of Finance specifications.
KSeF Invoice Numbers
Receive and store the unique KSeF invoice number (KSeF ID) assigned by the system for every submitted invoice.
Real-Time Status Tracking
Track the status of every KSeF submission — Sent, Processed, Rejected — directly in your invoice list.
Polish VAT Rates
Built-in support for all Polish VAT rates: 23%, 8%, 5%, 0%, and exempt. Rates applied automatically based on goods/services category.
NIP Validation
Automatic NIP (Tax Identification Number) validation for Polish businesses. Invoice Guru checks the format and checksum before submission.
KSeF Key Dates
The rollout of mandatory KSeF in Poland.
The Polish Ministry of Finance launched KSeF as a voluntary system for electronic invoicing.
Original mandatory date postponed following technical concerns raised by businesses and software providers.
KSeF becomes mandatory for businesses with annual VAT turnover exceeding PLN 200 million.
All VAT-registered businesses in Poland required to issue invoices exclusively through KSeF.
Dates based on published Polish Ministry of Finance guidance. Check gov.pl/ksef for the latest updates.
KSeF-ready from Day One
Don't scramble when KSeF becomes mandatory. Invoice Guru has you covered with full KSeF integration, built for Polish businesses.
No credit card required. Free plan available.