15. September 2026 Poland Employee Capital Plans (PPK) Poland: employer PPK (Pracownicze Plany Kapitałowe) contribution transfer due by the 15th Wiederkehrend 15. September 2026 Poland ZUS social insurance contributions Poland: ZUS social insurance contributions and DRA declaration due by the 15th (legal persons) Wiederkehrend 20. September 2026 Poland CIT advance payments Poland: monthly CIT advance payment due by the 20th (quarterly option for small taxpayers) Wiederkehrend 20. September 2026 Poland PFRON monthly declaration Poland: monthly PFRON declaration and payment due by the 20th (employers with 25+ employees) Wiederkehrend 20. September 2026 Poland PIT advances on employee salaries (płatnik) Poland: employer's monthly PIT advance payment on employee salaries due by the 20th Wiederkehrend 25. September 2026 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Wiederkehrend 1. Oktober 2026 Poland e-Doręczenia (Ustawa o doręczeniach elektronicznych) Poland: e-Doręczenia address becomes mandatory for CEIDG businesses registered before 2025 15. Oktober 2026 Poland Employee Capital Plans (PPK) Poland: employer PPK (Pracownicze Plany Kapitałowe) contribution transfer due by the 15th Wiederkehrend 15. Oktober 2026 Poland ZUS social insurance contributions Poland: ZUS social insurance contributions and DRA declaration due by the 15th (legal persons) Wiederkehrend 20. Oktober 2026 Poland CIT advance payments Poland: monthly CIT advance payment due by the 20th (quarterly option for small taxpayers) Wiederkehrend 20. Oktober 2026 Poland PFRON monthly declaration Poland: monthly PFRON declaration and payment due by the 20th (employers with 25+ employees) Wiederkehrend 20. Oktober 2026 Poland PIT advances on employee salaries (płatnik) Poland: employer's monthly PIT advance payment on employee salaries due by the 20th Wiederkehrend 25. Oktober 2026 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Wiederkehrend 15. November 2026 Poland Employee Capital Plans (PPK) Poland: employer PPK (Pracownicze Plany Kapitałowe) contribution transfer due by the 15th Wiederkehrend 15. November 2026 Poland ZUS social insurance contributions Poland: ZUS social insurance contributions and DRA declaration due by the 15th (legal persons) Wiederkehrend 20. November 2026 Poland CIT advance payments Poland: monthly CIT advance payment due by the 20th (quarterly option for small taxpayers) Wiederkehrend 20. November 2026 Poland PFRON monthly declaration Poland: monthly PFRON declaration and payment due by the 20th (employers with 25+ employees) Wiederkehrend 20. November 2026 Poland PIT advances on employee salaries (płatnik) Poland: employer's monthly PIT advance payment on employee salaries due by the 20th Wiederkehrend 25. November 2026 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Wiederkehrend 2. Dezember 2026 Platform Work Directive Plattformarbeitsrichtlinie: Beschäftigungsvermutung und Regeln zum algorithmischen Management müssen national gelten 15. Dezember 2026 Poland Employee Capital Plans (PPK) Poland: employer PPK (Pracownicze Plany Kapitałowe) contribution transfer due by the 15th Wiederkehrend 15. Dezember 2026 Poland ZUS social insurance contributions Poland: ZUS social insurance contributions and DRA declaration due by the 15th (legal persons) Wiederkehrend 20. Dezember 2026 Poland CIT advance payments Poland: monthly CIT advance payment due by the 20th (quarterly option for small taxpayers) Wiederkehrend 20. Dezember 2026 Poland PFRON monthly declaration Poland: monthly PFRON declaration and payment due by the 20th (employers with 25+ employees) Wiederkehrend 20. Dezember 2026 Poland PIT advances on employee salaries (płatnik) Poland: employer's monthly PIT advance payment on employee salaries due by the 20th Wiederkehrend 25. Dezember 2026 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Wiederkehrend 1. Januar 2027 Poland JPK_CIT / JPK_KR_PD (structured accounting books) Poland: JPK_CIT digital accounting-books reporting becomes mandatory for remaining CIT taxpayers 1. Januar 2027 Poland minimum wage Poland: 2027 minimum wage proposed at PLN 4,950; final regulation due by 15 September 2026 15. Januar 2027 Poland Employee Capital Plans (PPK) Poland: employer PPK (Pracownicze Plany Kapitałowe) contribution transfer due by the 15th Wiederkehrend 15. Januar 2027 Poland ZUS social insurance contributions Poland: ZUS social insurance contributions and DRA declaration due by the 15th (legal persons) Wiederkehrend 20. Januar 2027 Poland CIT advance payments Poland: monthly CIT advance payment due by the 20th (quarterly option for small taxpayers) Wiederkehrend 20. Januar 2027 Poland PFRON monthly declaration Poland: monthly PFRON declaration and payment due by the 20th (employers with 25+ employees) Wiederkehrend 20. Januar 2027 Poland PIT advances on employee salaries (płatnik) Poland: employer's monthly PIT advance payment on employee salaries due by the 20th Wiederkehrend 25. Januar 2027 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Wiederkehrend 31. Januar 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) Wiederkehrend 31. Januar 2027 Poland ZUS IWA accident-insurance information Poland: ZUS IWA accident-insurance information due 31 January (employers averaging 10+ insured) Wiederkehrend 15. Februar 2027 Poland Employee Capital Plans (PPK) Poland: employer PPK (Pracownicze Plany Kapitałowe) contribution transfer due by the 15th Wiederkehrend 15. Februar 2027 Poland ZUS social insurance contributions Poland: ZUS social insurance contributions and DRA declaration due by the 15th (legal persons) Wiederkehrend 20. Februar 2027 Poland CIT advance payments Poland: monthly CIT advance payment due by the 20th (quarterly option for small taxpayers) Wiederkehrend 20. Februar 2027 Poland PFRON monthly declaration Poland: monthly PFRON declaration and payment due by the 20th (employers with 25+ employees) Wiederkehrend 20. Februar 2027 Poland PIT advances on employee salaries (płatnik) Poland: employer's monthly PIT advance payment on employee salaries due by the 20th Wiederkehrend 25. Februar 2027 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Wiederkehrend 28. Februar 2027 Poland KOBiZE national emissions database report Poland: annual report to the national GHG/emissions database (KOBiZE) due by end of February Wiederkehrend 28. Februar 2027 Poland PIT employer information to employees Poland: PIT-11 statement must be provided to each employee by the end of February Wiederkehrend 15. März 2027 Poland Employee Capital Plans (PPK) Poland: employer PPK (Pracownicze Plany Kapitałowe) contribution transfer due by the 15th Wiederkehrend 15. März 2027 Poland ZUS social insurance contributions Poland: ZUS social insurance contributions and DRA declaration due by the 15th (legal persons) Wiederkehrend 15. März 2027 Poland BDO packaging/EPR annual report Poland: annual BDO report on packaging and products due 15 March Wiederkehrend 20. März 2027 Poland CIT advance payments Poland: monthly CIT advance payment due by the 20th (quarterly option for small taxpayers) Wiederkehrend 20. März 2027 Poland PFRON monthly declaration Poland: monthly PFRON declaration and payment due by the 20th (employers with 25+ employees) Wiederkehrend 20. März 2027 Poland PIT advances on employee salaries (płatnik) Poland: employer's monthly PIT advance payment on employee salaries due by the 20th Wiederkehrend 25. März 2027 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Wiederkehrend 31. März 2027 Poland CIT-8 annual return Poland: annual CIT-8 corporate income tax return due by 31 March Wiederkehrend 31. März 2027 Poland environmental-use fee (opłata za korzystanie ze środowiska) Poland: annual environmental-use fee (opłata za korzystanie ze środowiska) due by 31 March Wiederkehrend 15. April 2027 Poland Employee Capital Plans (PPK) Poland: employer PPK (Pracownicze Plany Kapitałowe) contribution transfer due by the 15th Wiederkehrend 15. April 2027 Poland ZUS social insurance contributions Poland: ZUS social insurance contributions and DRA declaration due by the 15th (legal persons) Wiederkehrend 20. April 2027 Poland CIT advance payments Poland: monthly CIT advance payment due by the 20th (quarterly option for small taxpayers) Wiederkehrend 20. April 2027 Poland PFRON monthly declaration Poland: monthly PFRON declaration and payment due by the 20th (employers with 25+ employees) Wiederkehrend 20. April 2027 Poland PIT advances on employee salaries (płatnik) Poland: employer's monthly PIT advance payment on employee salaries due by the 20th Wiederkehrend 25. April 2027 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Wiederkehrend 15. Mai 2027 Poland Employee Capital Plans (PPK) Poland: employer PPK (Pracownicze Plany Kapitałowe) contribution transfer due by the 15th Wiederkehrend 15. Mai 2027 Poland ZUS social insurance contributions Poland: ZUS social insurance contributions and DRA declaration due by the 15th (legal persons) Wiederkehrend 20. Mai 2027 Poland CIT advance payments Poland: monthly CIT advance payment due by the 20th (quarterly option for small taxpayers) Wiederkehrend 20. Mai 2027 Poland PFRON monthly declaration Poland: monthly PFRON declaration and payment due by the 20th (employers with 25+ employees) Wiederkehrend 20. Mai 2027 Poland PIT advances on employee salaries (płatnik) Poland: employer's monthly PIT advance payment on employee salaries due by the 20th Wiederkehrend 25. Mai 2027 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Wiederkehrend 15. Juni 2027 Poland Employee Capital Plans (PPK) Poland: employer PPK (Pracownicze Plany Kapitałowe) contribution transfer due by the 15th Wiederkehrend 15. Juni 2027 Poland ZUS social insurance contributions Poland: ZUS social insurance contributions and DRA declaration due by the 15th (legal persons) Wiederkehrend 20. Juni 2027 Poland CIT advance payments Poland: monthly CIT advance payment due by the 20th (quarterly option for small taxpayers) Wiederkehrend 20. Juni 2027 Poland PFRON monthly declaration Poland: monthly PFRON declaration and payment due by the 20th (employers with 25+ employees) Wiederkehrend 20. Juni 2027 Poland PIT advances on employee salaries (płatnik) Poland: employer's monthly PIT advance payment on employee salaries due by the 20th Wiederkehrend 25. Juni 2027 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Wiederkehrend 15. Juli 2027 Poland Employee Capital Plans (PPK) Poland: employer PPK (Pracownicze Plany Kapitałowe) contribution transfer due by the 15th Wiederkehrend 15. Juli 2027 Poland ZUS social insurance contributions Poland: ZUS social insurance contributions and DRA declaration due by the 15th (legal persons) Wiederkehrend 15. Juli 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) Wiederkehrend 20. Juli 2027 Poland CIT advance payments Poland: monthly CIT advance payment due by the 20th (quarterly option for small taxpayers) Wiederkehrend 20. Juli 2027 Poland PFRON monthly declaration Poland: monthly PFRON declaration and payment due by the 20th (employers with 25+ employees) Wiederkehrend 20. Juli 2027 Poland PIT advances on employee salaries (płatnik) Poland: employer's monthly PIT advance payment on employee salaries due by the 20th Wiederkehrend 25. Juli 2027 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Wiederkehrend 15. August 2027 Poland Employee Capital Plans (PPK) Poland: employer PPK (Pracownicze Plany Kapitałowe) contribution transfer due by the 15th Wiederkehrend 15. August 2027 Poland ZUS social insurance contributions Poland: ZUS social insurance contributions and DRA declaration due by the 15th (legal persons) Wiederkehrend 20. August 2027 Poland CIT advance payments Poland: monthly CIT advance payment due by the 20th (quarterly option for small taxpayers) Wiederkehrend 20. August 2027 Poland PFRON monthly declaration Poland: monthly PFRON declaration and payment due by the 20th (employers with 25+ employees) Wiederkehrend 20. August 2027 Poland PIT advances on employee salaries (płatnik) Poland: employer's monthly PIT advance payment on employee salaries due by the 20th Wiederkehrend 25. August 2027 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Wiederkehrend