When it comes to transactions, all accounts are not created equal. There are “transaction accounts” like share draft accounts (known as checking accounts) which offer unlimited transactions of any type or form. Then there are “non-transaction accounts” like share accounts (known as a savings account). Regulation D (Reg D) of the Federal Reserve Bank limits the number of certain types of withdrawals and transfers which can be made on share accounts to a total of no more than six each month. This monthly limit is based on when the transactions are posted to your shares not when you authorized the ACH transaction.