The article deals with the fiscal sustainability problems as well as the author’s modern concept of fiscal sustainability forUkraine. The author analyzes studies about fiscal sustainability determinants by various scholars. He also presents proved and arrangedimpacts on state fiscal sustainability in a short-term, medium-term and long-term periods. The article investigates featuresand effects of some determinants on fiscal sustainability in Ukraine, identifies prime and special ones. They include high exposureon revenues from non-renewable natural resources and remittances by individuals abroad that have great impact on fiscal sustainabilityof Ukraine.