Summary: The best 12-month USD fixed deposit rate in Singapore is 3.80% p.a. offered by RHB, while the best 6-month and 3-month rates are 3.90% p.a. offered by RHB and ICBC, respectively. While USD fixed deposit rates are higher than SGD rates, they come with foreign currency risk and are not covered by the Singapore Deposit Insurance Scheme.

Link: https://growbeansprout.com/insights/savings/singapore-best-foreign-currency-fixed-deposit-rate