10 septembre 2026 Poland INTRASTAT declarations Poland: INTRASTAT declaration due by the 10th (once statistical thresholds are exceeded) Récurrent 15 septembre 2026 Poland ZUS social insurance contributions Poland: ZUS social insurance contributions and DRA declaration due by the 15th (legal persons) Récurrent 20 septembre 2026 Poland CIT advance payments Poland: monthly CIT advance payment due by the 20th (quarterly option for small taxpayers) Récurrent 25 septembre 2026 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Récurrent 27 septembre 2026 Empowering Consumers for the Green Transition Directive Autonomiser les consommateurs pour la transition écologique : l'interdiction des allégations environnementales vagues et non fondées s'applique 1 octobre 2026 Poland e-Doręczenia (Ustawa o doręczeniach elektronicznych) Poland: e-Doręczenia address becomes mandatory for CEIDG businesses registered before 2025 10 octobre 2026 Poland INTRASTAT declarations Poland: INTRASTAT declaration due by the 10th (once statistical thresholds are exceeded) Récurrent 15 octobre 2026 Poland ZUS social insurance contributions Poland: ZUS social insurance contributions and DRA declaration due by the 15th (legal persons) Récurrent 20 octobre 2026 Poland CIT advance payments Poland: monthly CIT advance payment due by the 20th (quarterly option for small taxpayers) Récurrent 25 octobre 2026 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Récurrent 31 octobre 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 Récurrent 10 novembre 2026 Poland INTRASTAT declarations Poland: INTRASTAT declaration due by the 10th (once statistical thresholds are exceeded) Récurrent 15 novembre 2026 Poland ZUS social insurance contributions Poland: ZUS social insurance contributions and DRA declaration due by the 15th (legal persons) Récurrent 20 novembre 2026 Poland CIT advance payments Poland: monthly CIT advance payment due by the 20th (quarterly option for small taxpayers) Récurrent 25 novembre 2026 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Récurrent 9 décembre 2026 Product Liability Directive Application de la nouvelle directive sur la responsabilité du fait des produits : la responsabilité sans faute s'étend aux logiciels, à l'IA et aux services numériques 10 décembre 2026 Poland INTRASTAT declarations Poland: INTRASTAT declaration due by the 10th (once statistical thresholds are exceeded) Récurrent 15 décembre 2026 Poland ZUS social insurance contributions Poland: ZUS social insurance contributions and DRA declaration due by the 15th (legal persons) Récurrent 20 décembre 2026 Poland CIT advance payments Poland: monthly CIT advance payment due by the 20th (quarterly option for small taxpayers) Récurrent 24 décembre 2026 eIDAS 2 Portefeuille européen d'identité numérique : chaque État membre doit proposer un portefeuille ; les organismes publics doivent l'accepter 25 décembre 2026 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Récurrent 1 janvier 2027 Poland JPK_CIT / JPK_KR_PD (structured accounting books) Poland: JPK_CIT digital accounting-books reporting becomes mandatory for remaining CIT taxpayers 10 janvier 2027 Poland INTRASTAT declarations Poland: INTRASTAT declaration due by the 10th (once statistical thresholds are exceeded) Récurrent 15 janvier 2027 Poland ZUS social insurance contributions Poland: ZUS social insurance contributions and DRA declaration due by the 15th (legal persons) Récurrent 20 janvier 2027 Poland CIT advance payments Poland: monthly CIT advance payment due by the 20th (quarterly option for small taxpayers) Récurrent 25 janvier 2027 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Récurrent 31 janvier 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 Récurrent 10 février 2027 Poland INTRASTAT declarations Poland: INTRASTAT declaration due by the 10th (once statistical thresholds are exceeded) Récurrent 15 février 2027 Poland ZUS social insurance contributions Poland: ZUS social insurance contributions and DRA declaration due by the 15th (legal persons) Récurrent 20 février 2027 Poland CIT advance payments Poland: monthly CIT advance payment due by the 20th (quarterly option for small taxpayers) Récurrent 25 février 2027 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Récurrent 28 février 2027 Poland KOBiZE national emissions database report Poland: annual report to the national GHG/emissions database (KOBiZE) due by end of February Récurrent 10 mars 2027 Poland INTRASTAT declarations Poland: INTRASTAT declaration due by the 10th (once statistical thresholds are exceeded) Récurrent 15 mars 2027 Poland ZUS social insurance contributions Poland: ZUS social insurance contributions and DRA declaration due by the 15th (legal persons) Récurrent 15 mars 2027 Poland BDO packaging/EPR annual report Poland: annual BDO report on packaging and products due 15 March Récurrent 20 mars 2027 Poland CIT advance payments Poland: monthly CIT advance payment due by the 20th (quarterly option for small taxpayers) Récurrent 25 mars 2027 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Récurrent 31 mars 2027 Poland CIT-8 annual return Poland: annual CIT-8 corporate income tax return due by 31 March Récurrent 31 mars 2027 Poland environmental-use fee (opłata za korzystanie ze środowiska) Poland: annual environmental-use fee (opłata za korzystanie ze środowiska) due by 31 March Récurrent 10 avril 2027 Poland INTRASTAT declarations Poland: INTRASTAT declaration due by the 10th (once statistical thresholds are exceeded) Récurrent 15 avril 2027 Poland ZUS social insurance contributions Poland: ZUS social insurance contributions and DRA declaration due by the 15th (legal persons) Récurrent 20 avril 2027 Poland CIT advance payments Poland: monthly CIT advance payment due by the 20th (quarterly option for small taxpayers) Récurrent 25 avril 2027 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Récurrent 30 avril 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 Récurrent 10 mai 2027 Poland INTRASTAT declarations Poland: INTRASTAT declaration due by the 10th (once statistical thresholds are exceeded) Récurrent 15 mai 2027 Poland ZUS social insurance contributions Poland: ZUS social insurance contributions and DRA declaration due by the 15th (legal persons) Récurrent 20 mai 2027 Poland CIT advance payments Poland: monthly CIT advance payment due by the 20th (quarterly option for small taxpayers) Récurrent 25 mai 2027 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Récurrent 10 juin 2027 Poland INTRASTAT declarations Poland: INTRASTAT declaration due by the 10th (once statistical thresholds are exceeded) Récurrent 15 juin 2027 Poland ZUS social insurance contributions Poland: ZUS social insurance contributions and DRA declaration due by the 15th (legal persons) Récurrent 20 juin 2027 Poland CIT advance payments Poland: monthly CIT advance payment due by the 20th (quarterly option for small taxpayers) Récurrent 25 juin 2027 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Récurrent 30 juin 2027 EUDR Règlement UE sur la déforestation : application du devoir de diligence aux micro et petites entreprises 9 juillet 2027 Instant Payments Regulation Règlement sur les paiements instantanés : envoi de paiements instantanés en euros et vérification du bénéficiaire obligatoires pour les banques hors zone euro (Pologne, Suède, Tchéquie, etc.) 10 juillet 2027 Poland INTRASTAT declarations Poland: INTRASTAT declaration due by the 10th (once statistical thresholds are exceeded) Récurrent 15 juillet 2027 Poland ZUS social insurance contributions Poland: ZUS social insurance contributions and DRA declaration due by the 15th (legal persons) Récurrent 15 juillet 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) Récurrent 20 juillet 2027 Poland CIT advance payments Poland: monthly CIT advance payment due by the 20th (quarterly option for small taxpayers) Récurrent 25 juillet 2027 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Récurrent 31 juillet 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 Récurrent 10 août 2027 Poland INTRASTAT declarations Poland: INTRASTAT declaration due by the 10th (once statistical thresholds are exceeded) Récurrent 15 août 2027 Poland ZUS social insurance contributions Poland: ZUS social insurance contributions and DRA declaration due by the 15th (legal persons) Récurrent 20 août 2027 Poland CIT advance payments Poland: monthly CIT advance payment due by the 20th (quarterly option for small taxpayers) Récurrent 25 août 2027 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Récurrent