Eligibility Under the TSP Rule of 55 To use the TSP Rule of 55, you must separate from federal service in the same calendar year you turn 55 or older. This rule offers an exception to the usual 10% early withdrawal penalty on TSP accounts. The Rule of 55 TSP feature doesn't apply if you retire earlier or roll funds into an IRA. Understanding these TSP Rule of 55 withdrawal rules can ... https://www.federalpensionadvisors.com/post/tsp-rule-of-55