Your credit score is also affected by large account balances. (badcredit.org)
Once that account balance is paid off, what you used to be paying monthly for that bill is then rolled over into the next largest account balance. (treesfullofmoney.com)
When paid directly by the plan, administrative fees are either allocated among individual accounts in proportion to each account balance (i.e., participants with larger account balances pay more of the allocated expenses) or passed through as a flat fee against each participant's account. (money.stackexchange.com)