After announcing amendments to the Personal Income Tax (PIT) Act on 8 August 2017, Parliament debated more amendments in their second reading on 22 November to modify PIT treatment as part of the 2018 reform. On 14 November the Cabinet of Ministers endorsed amendments to Cabinet Regulation No. 899, which explains the application of the PIT Act. This article explores the main aspects that employers and payroll accountants need to consider in preparing for changes to their payroll calculation procedures.