Common Mistakes with the TSP Rule of 55 One of the most common mistakes with the TSP Rule of 55 is assuming it applies to any retirement account. The rule only applies to your TSP—not to IRAs or other employer-sponsored plans—unless the funds were rolled into your TSP before separation. Another frequent error is separating from service before the year you turn 55, which disqualifies... https://www.federalpensionadvisors.com/post/tsp-rule-of-55