Pursuant to sec. 233a and sec. 238 General Tax Act (Abgabenordnung), the German tax authorities charge interest on taxes at a rate of 0.5% per month (6% p.a.). The interest period begins 15 months after the expiration of the calendar year in which the tax has arisen, i.e. the interest period for income tax for fiscal year 2016 starts on April 1, 2018. From tax audits alone, the tax authorities received more than EUR 2bn. in interest on taxes in recent years.