+ See a summary of our picks Best IRA CD rates | October 2018 Connexus Credit Union: 2.50%–3.25% APY, $5,000 minimum deposit Discover: 0.35%–3.10% APY, $2,500 minimum deposit Capital One 360: 0.60%–3.00% APY, no minimum deposit Synchrony Bank: 0.75%–3.10% APY, $2,000 minimum deposit Ally: 0.75%–3.00% APY, no minimum deposit IRA CDs can provide solid, guaranteed... Spencer Tierney is a writer at NerdWallet.