https://www.cpf.gov.sg/Members/AboutUs/about-us-info/cpf-interest-rates
Interest Rate for Special and MediSave Account​
Interest rate from 1 July 2021 to 30 September 2021: 4% per annum
The interest rate is computed based on the 12-month average yield of 10-year Singapore Government Securities (10YSGS) plus 1%2, subject to the current floor interest rate of 4% per annum3. The interest rate is reviewed quarterly.
2 - 2.04% for period between May 2020 to April 2021