15 September 2026 Poland Employee Capital Plans (PPK) Poland: employer PPK (Pracownicze Plany Kapitałowe) contribution transfer due by the 15th 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 20 September 2026 Poland PFRON monthly declaration Poland: monthly PFRON declaration and payment due by the 20th (employers with 25+ employees) Recurring 20 September 2026 Poland PIT advances on employee salaries (płatnik) Poland: employer's monthly PIT advance payment on employee salaries due by the 20th Recurring 25 September 2026 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Recurring 1 October 2026 Poland e-Doręczenia (Ustawa o doręczeniach elektronicznych) Poland: e-Doręczenia address becomes mandatory for CEIDG businesses registered before 2025 15 October 2026 Poland Employee Capital Plans (PPK) Poland: employer PPK (Pracownicze Plany Kapitałowe) contribution transfer due by the 15th 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 20 October 2026 Poland PFRON monthly declaration Poland: monthly PFRON declaration and payment due by the 20th (employers with 25+ employees) Recurring 20 October 2026 Poland PIT advances on employee salaries (płatnik) Poland: employer's monthly PIT advance payment on employee salaries due by the 20th Recurring 25 October 2026 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Recurring 15 November 2026 Poland Employee Capital Plans (PPK) Poland: employer PPK (Pracownicze Plany Kapitałowe) contribution transfer due by the 15th 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 20 November 2026 Poland PFRON monthly declaration Poland: monthly PFRON declaration and payment due by the 20th (employers with 25+ employees) Recurring 20 November 2026 Poland PIT advances on employee salaries (płatnik) Poland: employer's monthly PIT advance payment on employee salaries due by the 20th Recurring 25 November 2026 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Recurring 2 December 2026 Platform Work Directive Platform Work Directive: presumption of employment and algorithmic-management rules must apply nationally 15 December 2026 Poland Employee Capital Plans (PPK) Poland: employer PPK (Pracownicze Plany Kapitałowe) contribution transfer due by the 15th 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 20 December 2026 Poland PFRON monthly declaration Poland: monthly PFRON declaration and payment due by the 20th (employers with 25+ employees) Recurring 20 December 2026 Poland PIT advances on employee salaries (płatnik) Poland: employer's monthly PIT advance payment on employee salaries due by the 20th Recurring 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 1 January 2027 Poland minimum wage Poland: 2027 minimum wage proposed at PLN 4,950; final regulation due by 15 September 2026 15 January 2027 Poland Employee Capital Plans (PPK) Poland: employer PPK (Pracownicze Plany Kapitałowe) contribution transfer due by the 15th 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 20 January 2027 Poland PFRON monthly declaration Poland: monthly PFRON declaration and payment due by the 20th (employers with 25+ employees) Recurring 20 January 2027 Poland PIT advances on employee salaries (płatnik) Poland: employer's monthly PIT advance payment on employee salaries due by the 20th 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 PIT employer annual information returns Poland: annual PIT-11, PIT-4R and PIT-8AR employer information returns due 31 January (to the tax office) Recurring 31 January 2027 Poland ZUS IWA accident-insurance information Poland: ZUS IWA accident-insurance information due 31 January (employers averaging 10+ insured) Recurring 15 February 2027 Poland Employee Capital Plans (PPK) Poland: employer PPK (Pracownicze Plany Kapitałowe) contribution transfer due by the 15th 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 20 February 2027 Poland PFRON monthly declaration Poland: monthly PFRON declaration and payment due by the 20th (employers with 25+ employees) Recurring 20 February 2027 Poland PIT advances on employee salaries (płatnik) Poland: employer's monthly PIT advance payment on employee salaries due by the 20th 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 28 February 2027 Poland PIT employer information to employees Poland: PIT-11 statement must be provided to each employee by the end of February Recurring 15 March 2027 Poland Employee Capital Plans (PPK) Poland: employer PPK (Pracownicze Plany Kapitałowe) contribution transfer due by the 15th 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 20 March 2027 Poland PFRON monthly declaration Poland: monthly PFRON declaration and payment due by the 20th (employers with 25+ employees) Recurring 20 March 2027 Poland PIT advances on employee salaries (płatnik) Poland: employer's monthly PIT advance payment on employee salaries due by the 20th 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 15 April 2027 Poland Employee Capital Plans (PPK) Poland: employer PPK (Pracownicze Plany Kapitałowe) contribution transfer due by the 15th 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 20 April 2027 Poland PFRON monthly declaration Poland: monthly PFRON declaration and payment due by the 20th (employers with 25+ employees) Recurring 20 April 2027 Poland PIT advances on employee salaries (płatnik) Poland: employer's monthly PIT advance payment on employee salaries due by the 20th Recurring 25 April 2027 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Recurring 15 May 2027 Poland Employee Capital Plans (PPK) Poland: employer PPK (Pracownicze Plany Kapitałowe) contribution transfer due by the 15th 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 20 May 2027 Poland PFRON monthly declaration Poland: monthly PFRON declaration and payment due by the 20th (employers with 25+ employees) Recurring 20 May 2027 Poland PIT advances on employee salaries (płatnik) Poland: employer's monthly PIT advance payment on employee salaries due by the 20th Recurring 25 May 2027 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Recurring 15 June 2027 Poland Employee Capital Plans (PPK) Poland: employer PPK (Pracownicze Plany Kapitałowe) contribution transfer due by the 15th 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 20 June 2027 Poland PFRON monthly declaration Poland: monthly PFRON declaration and payment due by the 20th (employers with 25+ employees) Recurring 20 June 2027 Poland PIT advances on employee salaries (płatnik) Poland: employer's monthly PIT advance payment on employee salaries due by the 20th Recurring 25 June 2027 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Recurring 15 July 2027 Poland Employee Capital Plans (PPK) Poland: employer PPK (Pracownicze Plany Kapitałowe) contribution transfer due by the 15th 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 20 July 2027 Poland PFRON monthly declaration Poland: monthly PFRON declaration and payment due by the 20th (employers with 25+ employees) Recurring 20 July 2027 Poland PIT advances on employee salaries (płatnik) Poland: employer's monthly PIT advance payment on employee salaries due by the 20th Recurring 25 July 2027 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Recurring 15 August 2027 Poland Employee Capital Plans (PPK) Poland: employer PPK (Pracownicze Plany Kapitałowe) contribution transfer due by the 15th 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 20 August 2027 Poland PFRON monthly declaration Poland: monthly PFRON declaration and payment due by the 20th (employers with 25+ employees) Recurring 20 August 2027 Poland PIT advances on employee salaries (płatnik) Poland: employer's monthly PIT advance payment on employee salaries due by the 20th Recurring 25 August 2027 Poland JPK_V7 (VAT records and declaration) Poland: JPK_V7M monthly VAT return and payment due by the 25th Recurring