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    E-Invoice
    February 23, 2026 (about 7 hours ago)

    Poland e-Invoicing Guide: KSeF Mandate, Timeline & Compliance Requirements

    Featured image for: Poland e-Invoicing Guide: KSeF Mandate, Timeline & Compliance Requirements
    Poland VAT News • E-Invoice

    Summary

    Poland's KSeF e-invoicing system requires all VAT‑registered businesses to submit B2B invoices via a centralized platform using the FA(3) XML format. Large taxpayers must comply from February 2026, others from April 2026, with a grace period through 2026 and penalties starting in 2027. The system assigns unique identifiers, stores invoices for ten years, and imposes up to 100 % VAT penalties for non‑compliance after the grace period.

    Key Insights

    When does the KSeF mandate take effect for large taxpayers in Poland?

    Large taxpayers (revenue above PLN 200 million) must use KSeF from February 2026.

    What penalties apply for non‑compliance with KSeF after the grace period?

    From January 2027, penalties can reach up to 100 % of the VAT amount on the invoice, or 18.7 % of the gross amount for VAT‑exempt invoices.

    What is required for B2B invoices to be considered valid under the Polish e‑invoicing system?

    B2B invoices must be submitted via KSeF using the FA(3) XML schema, receive a unique KSeF number and UPO confirmation; invoices without a valid KSeF number are invalid for tax purposes.

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