10 September 2026 Poland INTRASTAT declarations Poland: INTRASTAT declaration due by the 10th (once statistical thresholds are exceeded) Recurring 15 September 2026 Poland ZUS social insurance contributions Poland: ZUS social insurance contributions and DRA declaration due by the 15th (legal persons) Recurring 20 September 2026 Poland CIT advance payments Poland: monthly CIT advance payment due by the 20th (quarterly option for small taxpayers) Recurring 25 September 2026 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Recurring 27 September 2026 Empowering Consumers for the Green Transition Directive Empowering Consumers for the Green Transition: ban on vague/unsubstantiated environmental claims applies 1 October 2026 Poland e-Doręczenia (Ustawa o doręczeniach elektronicznych) Poland: e-Doręczenia address becomes mandatory for CEIDG businesses registered before 2025 10 October 2026 Poland INTRASTAT declarations Poland: INTRASTAT declaration due by the 10th (once statistical thresholds are exceeded) Recurring 15 October 2026 Poland ZUS social insurance contributions Poland: ZUS social insurance contributions and DRA declaration due by the 15th (legal persons) Recurring 20 October 2026 Poland CIT advance payments Poland: monthly CIT advance payment due by the 20th (quarterly option for small taxpayers) Recurring 25 October 2026 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Recurring 31 October 2026 Poland VAT OSS (Unijna procedura One Stop Shop) Poland: VAT OSS Union-scheme return and payment due by the end of the month after each quarter Recurring 10 November 2026 Poland INTRASTAT declarations Poland: INTRASTAT declaration due by the 10th (once statistical thresholds are exceeded) Recurring 15 November 2026 Poland ZUS social insurance contributions Poland: ZUS social insurance contributions and DRA declaration due by the 15th (legal persons) Recurring 20 November 2026 Poland CIT advance payments Poland: monthly CIT advance payment due by the 20th (quarterly option for small taxpayers) Recurring 25 November 2026 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Recurring 9 December 2026 Product Liability Directive New Product Liability Directive applies: strict liability extends to software, AI and digital services 10 December 2026 Poland INTRASTAT declarations Poland: INTRASTAT declaration due by the 10th (once statistical thresholds are exceeded) Recurring 15 December 2026 Poland ZUS social insurance contributions Poland: ZUS social insurance contributions and DRA declaration due by the 15th (legal persons) Recurring 20 December 2026 Poland CIT advance payments Poland: monthly CIT advance payment due by the 20th (quarterly option for small taxpayers) Recurring 24 December 2026 eIDAS 2 EU Digital Identity Wallet: every Member State must offer a wallet; public bodies must accept it 25 December 2026 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Recurring 1 January 2027 Poland JPK_CIT / JPK_KR_PD (structured accounting books) Poland: JPK_CIT digital accounting-books reporting becomes mandatory for remaining CIT taxpayers 10 January 2027 Poland INTRASTAT declarations Poland: INTRASTAT declaration due by the 10th (once statistical thresholds are exceeded) Recurring 15 January 2027 Poland ZUS social insurance contributions Poland: ZUS social insurance contributions and DRA declaration due by the 15th (legal persons) Recurring 20 January 2027 Poland CIT advance payments Poland: monthly CIT advance payment due by the 20th (quarterly option for small taxpayers) Recurring 25 January 2027 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Recurring 31 January 2027 Poland VAT OSS (Unijna procedura One Stop Shop) Poland: VAT OSS Union-scheme return and payment due by the end of the month after each quarter Recurring 10 February 2027 Poland INTRASTAT declarations Poland: INTRASTAT declaration due by the 10th (once statistical thresholds are exceeded) Recurring 15 February 2027 Poland ZUS social insurance contributions Poland: ZUS social insurance contributions and DRA declaration due by the 15th (legal persons) Recurring 20 February 2027 Poland CIT advance payments Poland: monthly CIT advance payment due by the 20th (quarterly option for small taxpayers) Recurring 25 February 2027 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Recurring 28 February 2027 Poland KOBiZE national emissions database report Poland: annual report to the national GHG/emissions database (KOBiZE) due by end of February Recurring 10 March 2027 Poland INTRASTAT declarations Poland: INTRASTAT declaration due by the 10th (once statistical thresholds are exceeded) Recurring 15 March 2027 Poland ZUS social insurance contributions Poland: ZUS social insurance contributions and DRA declaration due by the 15th (legal persons) Recurring 15 March 2027 Poland BDO packaging/EPR annual report Poland: annual BDO report on packaging and products due 15 March Recurring 20 March 2027 Poland CIT advance payments Poland: monthly CIT advance payment due by the 20th (quarterly option for small taxpayers) Recurring 25 March 2027 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Recurring 31 March 2027 Poland CIT-8 annual return Poland: annual CIT-8 corporate income tax return due by 31 March Recurring 31 March 2027 Poland environmental-use fee (opłata za korzystanie ze środowiska) Poland: annual environmental-use fee (opłata za korzystanie ze środowiska) due by 31 March Recurring 10 April 2027 Poland INTRASTAT declarations Poland: INTRASTAT declaration due by the 10th (once statistical thresholds are exceeded) Recurring 15 April 2027 Poland ZUS social insurance contributions Poland: ZUS social insurance contributions and DRA declaration due by the 15th (legal persons) Recurring 20 April 2027 Poland CIT advance payments Poland: monthly CIT advance payment due by the 20th (quarterly option for small taxpayers) Recurring 25 April 2027 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Recurring 30 April 2027 Poland VAT OSS (Unijna procedura One Stop Shop) Poland: VAT OSS Union-scheme return and payment due by the end of the month after each quarter Recurring 10 May 2027 Poland INTRASTAT declarations Poland: INTRASTAT declaration due by the 10th (once statistical thresholds are exceeded) Recurring 15 May 2027 Poland ZUS social insurance contributions Poland: ZUS social insurance contributions and DRA declaration due by the 15th (legal persons) Recurring 20 May 2027 Poland CIT advance payments Poland: monthly CIT advance payment due by the 20th (quarterly option for small taxpayers) Recurring 25 May 2027 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Recurring 10 June 2027 Poland INTRASTAT declarations Poland: INTRASTAT declaration due by the 10th (once statistical thresholds are exceeded) Recurring 15 June 2027 Poland ZUS social insurance contributions Poland: ZUS social insurance contributions and DRA declaration due by the 15th (legal persons) Recurring 20 June 2027 Poland CIT advance payments Poland: monthly CIT advance payment due by the 20th (quarterly option for small taxpayers) Recurring 25 June 2027 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Recurring 30 June 2027 EUDR EU Deforestation Regulation: due diligence applies for micro and small enterprises 9 July 2027 Instant Payments Regulation Instant Payments Regulation: sending instant euro payments and Verification of Payee mandatory for non-euro-area banks (Poland, Sweden, Czechia, etc.) 10 July 2027 Poland INTRASTAT declarations Poland: INTRASTAT declaration due by the 10th (once statistical thresholds are exceeded) Recurring 15 July 2027 Poland ZUS social insurance contributions Poland: ZUS social insurance contributions and DRA declaration due by the 15th (legal persons) Recurring 15 July 2027 Poland annual financial statements - KRS/RDF filing Poland: e-financial statements filing to KRS via RDF due within 15 days of approval (by 15 July for calendar-year filers) Recurring 20 July 2027 Poland CIT advance payments Poland: monthly CIT advance payment due by the 20th (quarterly option for small taxpayers) Recurring 25 July 2027 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Recurring 31 July 2027 Poland VAT OSS (Unijna procedura One Stop Shop) Poland: VAT OSS Union-scheme return and payment due by the end of the month after each quarter Recurring 10 August 2027 Poland INTRASTAT declarations Poland: INTRASTAT declaration due by the 10th (once statistical thresholds are exceeded) Recurring 15 August 2027 Poland ZUS social insurance contributions Poland: ZUS social insurance contributions and DRA declaration due by the 15th (legal persons) Recurring 20 August 2027 Poland CIT advance payments Poland: monthly CIT advance payment due by the 20th (quarterly option for small taxpayers) Recurring 25 August 2027 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Recurring