The deadline for the first appeal depends on the type of appeal procedure:
Administrative procedure: An appeal may be filed within 10 business days following the date of receipt of the tax assessment notice.
Judicial procedure: As a general rule, the lawsuit may be filed within (i) three months - where the taxpayer has used an administrative appeal procedure or (ii) within six months following the date of receipt of the tax assessment notice (if the administrative procedure has not been invoked). the six-months term is disputable due to a controversy in the Tax Code of Ukraine that suggests that if the tax notice is not contested within 10 business days, the additional tax assessment and penalties (if any) are deemed to be accepted by the taxpayer and must be settled. The taxpayer is not precluded from subsequently challenging the tax notice within the six-month period. If, however, the tax notice is contested within 10 business days following the receipt thereof (including if such is issued after the completion of the administrative procedure), the tax and penalties payment obligation does not arise until the matter is resolved in court.
Taxpayers are free to proceed with either an administrative or a judicial appeal procedure.
By applying to the court, a taxpayer automatically loses the right to an administrative appeal.
For the administrative appeal procedure, it could take up to 120 calendar days (which may be final in the case of a successful decision in favor of a taxpayer).
For the judicial appeal procedure, the time for reaching a final national decision may vary and depends on the courts' and judges' workload. The Administrative Procedural Code provides for a "reasonable term" for a case to pass all court instances and reach a final decision. In practice, reaching a final decision may take years. From our practice, it takes up to seven years to obtain the cassation court decision in extreme cases.