+ See a summary of the best 3-month CD rates Best three-month CD rates for April 2019 Popular Direct: 2.15% APY, $10,000 minimum deposit TIAA Bank: 2.00% APY, $5,000 minimum deposit Radius Bank: 0.85% APY, $1,000 minimum deposit Synchrony Bank: 0.75% APY, $2,000 minimum deposit Ally Bank: 0.75% APY, no minimum deposit Best 3-month CD... Spencer Tierney is a writer at NerdWallet.