On 22 February 2021, the Hungarian Parliament approved the bill for the ratification of the Multilateral Convention to Implement Tax Treaty Related Measures to Prevent Base Erosion and Profit Shifting (MLI).

The MLI will generally enter into force for a particular covered agreement on the first day of the month following a three-month period after both parties to the covered agreement have deposited their ratification instrument. Once in force, the provisions of the MLI will generally apply for a covered agreement from 1 January of the year following its entry into force in respect of withholding taxes, and for all other taxes with respect to taxable periods beginning on or after the expiration of a 6-month period following the date of entry into force.