The Swiss Federal Tax Administration has published Circular Letter 2-185-D-2020-f of 22 October 2020, which sets out the federal direct tax interest rates for the 2021 calendar year. The letter notes that the Federal Department of Finance has decided to maintain the rates applicable for 2020 and as such the rates for 2021 are as follows:

• Interest on tax arrears and refunds - 3%
• Interest on ad…