15 septembre 2026 Poland Employee Capital Plans (PPK) Poland: employer PPK (Pracownicze Plany Kapitałowe) contribution transfer due by the 15th 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 20 septembre 2026 Poland PFRON monthly declaration Poland: monthly PFRON declaration and payment due by the 20th (employers with 25+ employees) Récurrent 20 septembre 2026 Poland PIT advances on employee salaries (płatnik) Poland: employer's monthly PIT advance payment on employee salaries due by the 20th Récurrent 25 septembre 2026 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Récurrent 1 octobre 2026 Poland e-Doręczenia (Ustawa o doręczeniach elektronicznych) Poland: e-Doręczenia address becomes mandatory for CEIDG businesses registered before 2025 15 octobre 2026 Poland Employee Capital Plans (PPK) Poland: employer PPK (Pracownicze Plany Kapitałowe) contribution transfer due by the 15th 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 20 octobre 2026 Poland PFRON monthly declaration Poland: monthly PFRON declaration and payment due by the 20th (employers with 25+ employees) Récurrent 20 octobre 2026 Poland PIT advances on employee salaries (płatnik) Poland: employer's monthly PIT advance payment on employee salaries due by the 20th Récurrent 25 octobre 2026 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Récurrent 15 novembre 2026 Poland Employee Capital Plans (PPK) Poland: employer PPK (Pracownicze Plany Kapitałowe) contribution transfer due by the 15th 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 20 novembre 2026 Poland PFRON monthly declaration Poland: monthly PFRON declaration and payment due by the 20th (employers with 25+ employees) Récurrent 20 novembre 2026 Poland PIT advances on employee salaries (płatnik) Poland: employer's monthly PIT advance payment on employee salaries due by the 20th Récurrent 25 novembre 2026 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Récurrent 2 décembre 2026 Platform Work Directive Directive sur le travail via une plateforme : la présomption de salariat et les règles de gestion algorithmique doivent s'appliquer au niveau national 15 décembre 2026 Poland Employee Capital Plans (PPK) Poland: employer PPK (Pracownicze Plany Kapitałowe) contribution transfer due by the 15th 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 20 décembre 2026 Poland PFRON monthly declaration Poland: monthly PFRON declaration and payment due by the 20th (employers with 25+ employees) Récurrent 20 décembre 2026 Poland PIT advances on employee salaries (płatnik) Poland: employer's monthly PIT advance payment on employee salaries due by the 20th Récurrent 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 1 janvier 2027 Poland minimum wage Poland: 2027 minimum wage proposed at PLN 4,950; final regulation due by 15 September 2026 15 janvier 2027 Poland Employee Capital Plans (PPK) Poland: employer PPK (Pracownicze Plany Kapitałowe) contribution transfer due by the 15th 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 20 janvier 2027 Poland PFRON monthly declaration Poland: monthly PFRON declaration and payment due by the 20th (employers with 25+ employees) Récurrent 20 janvier 2027 Poland PIT advances on employee salaries (płatnik) Poland: employer's monthly PIT advance payment on employee salaries due by the 20th 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 PIT employer annual information returns Poland: annual PIT-11, PIT-4R and PIT-8AR employer information returns due 31 January (to the tax office) Récurrent 31 janvier 2027 Poland ZUS IWA accident-insurance information Poland: ZUS IWA accident-insurance information due 31 January (employers averaging 10+ insured) Récurrent 15 février 2027 Poland Employee Capital Plans (PPK) Poland: employer PPK (Pracownicze Plany Kapitałowe) contribution transfer due by the 15th 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 20 février 2027 Poland PFRON monthly declaration Poland: monthly PFRON declaration and payment due by the 20th (employers with 25+ employees) Récurrent 20 février 2027 Poland PIT advances on employee salaries (płatnik) Poland: employer's monthly PIT advance payment on employee salaries due by the 20th 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 28 février 2027 Poland PIT employer information to employees Poland: PIT-11 statement must be provided to each employee by the end of February Récurrent 15 mars 2027 Poland Employee Capital Plans (PPK) Poland: employer PPK (Pracownicze Plany Kapitałowe) contribution transfer due by the 15th 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 20 mars 2027 Poland PFRON monthly declaration Poland: monthly PFRON declaration and payment due by the 20th (employers with 25+ employees) Récurrent 20 mars 2027 Poland PIT advances on employee salaries (płatnik) Poland: employer's monthly PIT advance payment on employee salaries due by the 20th 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 15 avril 2027 Poland Employee Capital Plans (PPK) Poland: employer PPK (Pracownicze Plany Kapitałowe) contribution transfer due by the 15th 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 20 avril 2027 Poland PFRON monthly declaration Poland: monthly PFRON declaration and payment due by the 20th (employers with 25+ employees) Récurrent 20 avril 2027 Poland PIT advances on employee salaries (płatnik) Poland: employer's monthly PIT advance payment on employee salaries due by the 20th Récurrent 25 avril 2027 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Récurrent 15 mai 2027 Poland Employee Capital Plans (PPK) Poland: employer PPK (Pracownicze Plany Kapitałowe) contribution transfer due by the 15th 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 20 mai 2027 Poland PFRON monthly declaration Poland: monthly PFRON declaration and payment due by the 20th (employers with 25+ employees) Récurrent 20 mai 2027 Poland PIT advances on employee salaries (płatnik) Poland: employer's monthly PIT advance payment on employee salaries due by the 20th Récurrent 25 mai 2027 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Récurrent 15 juin 2027 Poland Employee Capital Plans (PPK) Poland: employer PPK (Pracownicze Plany Kapitałowe) contribution transfer due by the 15th 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 20 juin 2027 Poland PFRON monthly declaration Poland: monthly PFRON declaration and payment due by the 20th (employers with 25+ employees) Récurrent 20 juin 2027 Poland PIT advances on employee salaries (płatnik) Poland: employer's monthly PIT advance payment on employee salaries due by the 20th Récurrent 25 juin 2027 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Récurrent 15 juillet 2027 Poland Employee Capital Plans (PPK) Poland: employer PPK (Pracownicze Plany Kapitałowe) contribution transfer due by the 15th 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 20 juillet 2027 Poland PFRON monthly declaration Poland: monthly PFRON declaration and payment due by the 20th (employers with 25+ employees) Récurrent 20 juillet 2027 Poland PIT advances on employee salaries (płatnik) Poland: employer's monthly PIT advance payment on employee salaries due by the 20th Récurrent 25 juillet 2027 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Récurrent 15 août 2027 Poland Employee Capital Plans (PPK) Poland: employer PPK (Pracownicze Plany Kapitałowe) contribution transfer due by the 15th 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 20 août 2027 Poland PFRON monthly declaration Poland: monthly PFRON declaration and payment due by the 20th (employers with 25+ employees) Récurrent 20 août 2027 Poland PIT advances on employee salaries (płatnik) Poland: employer's monthly PIT advance payment on employee salaries due by the 20th Récurrent 25 août 2027 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Récurrent