The National Fiscal Service explains
The excise tax on goods (products) at rates in foreign currency is to be paid in the national currency, being calculated at the official exchange rate for hryvnia against dollar set by the central bank of Ukraine, being in effect on the first day of the quarter, in which the sale of goods (products) is made, and remains unchanged throughout the said months, the press-office of the National Fiscal Service explains.
The procedure for calculating the excise tax is governed by chapter VI of the Tax Code of Ukraine dd. December 02, 2010, No.2755-VІ, as amended.