https://www.forbes.com/advisor/retirement/rule-of-55-retirement/
The rule of 55 is an IRS guideline that allows you to avoid paying the 10% early withdrawal penalty on 401(k) and 403(b) retirement accounts if you leave your job during or after the calendar year you turn 55.
Confirmed. My wife retired at age 55 with no penalty pulling from her 401k. The same for 403b’s and 457’s. 457’s have a special withdrawal rule if it’s a government job (federal or local): you can withdraw from it at any age without penalty after leaving work there. 457’s that aren’t government jobs (I.e. church employees) don’t have that special rule. They have the age 55 and age 59.5 rules that 401k’s and 403b’s have.