The Savings account interest rate at Capital One Direct Banking has just changed from 0.823% APY to 0.8234% APY with a minimum of $5,000 required. See the full details and rate info at Capital One Direct Banking Money Market/Savings $1000 rate. Costco Interest Plus Online Savings Must be a current Costco member and open the account online on Costco website. Must receive E-Statements. Customers will get 10% bonus on their earned interest rate if average monthly balance is $10K or more. Receive a $60 incentive for Executive Members