Why did I get an unexpected social security deposit to my account mid-month on March 15, 2018? I usually receive payment the 3rd day of the month. There was also a slight increase.

Hi,

There are a number of possibilities. Social Security runs many different automated processes that can result in a benefit rate adjustment and/or payment of retroactive benefits. You should get a letter from Social Security explaining the payment, but those types of letters can arrive up to 2 weeks after the electronic payment is received.

Best, Jerry