Abstract
The relevance of the research of applying penal (financial) sanctions for non-payment of agreed amounts of tax obligations has been determined by multifaceted and controversial relations that arise regarding tax and fee collection, competence of controlling bodies, powers and duties of their officials, responsibility for violations of tax legislation. The purpose of the article is to reveal the features of applying penal (financial) sanctions for non-payment of agreed amounts of tax obligations. Contemporary general philosophical, general scientific and specific scientific methods have been used. The procedure for bringing the payer to financial responsibility and fintech model when applying fines have been addressed. It has been adduced that the date from which the period during which a fine could be imposed is calculated is the date of payment of the agreed amount of the tax liability, and not the date on which the statutory payment period for the agreed monetary liability expires. Specificity of the date from which this period is calculated, has been dealt with in terms of the tax authority conducting a chamber audit on the timeliness of payment of the agreed tax (monetary) obligation, and the application of fines for late payment by the taxpayer of the agreed monetary liability is the date of actual payment of the agreed amount of the tax liability. The practical value of the results is that they could be used to establish specific temporal limits for calculating the period during which a chamber check could be conducted on the timeliness for paying the agreed monetary obligations.