Blog - read articles written by our specialists

• consulting

  Aider Polska Expands to Łódź Through Ground Frost Acquisition

  Aider Poland

  10.09.2026

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• accounting

  New PIT 2027 tax brackets. Will a third tax bracket be introduced?

  Aider Poland

  27.08.2026

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• accounting

  KSeF 2.0 Error Codes – List of Errors, HTTP Statuses, and Responses

  Aider Poland

  19.06.2026

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• Kadry i Płace

  The most common errors detected by Social Security - how does an accounting office help with an audit?

  Aider Poland

  21.05.2026

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• accounting

  How to correct financial statements? Error correction and auditing of reports

  Aider Poland

  19.05.2026

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• ZUS audit step by step - the course of the audit

  Aider Poland

  17.05.2026

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• accounting

  Cash method versus accrual method - differences in VAT and PIT 2026

  Aider Poland

  13.05.2026

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• Cadastral tax - what is it, how much is it and who will pay in Poland?

  Aider Poland

  04.05.2026

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• The role of regular training in professional development

  Katarzyna Doktór

  24.03.2026

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• Księgowość

  Changes to the Gift and Inheritance Tax from 2026 – Amendment of the Act and a Second Chance for Taxpayers

  Marta Oziemblewska

  11.02.2026

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• Voluntary Disclosure to the Tax Office

  Maciej Smogorzewski

  10.02.2026

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• Kadry i Płace

  50% Tax-Deductible Costs: Tax Optimisation in IT

  Marta Oziemblewska

  05.02.2026

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