A short guide to understanding what happens at different ages throughout retirement - for example:
Age 50 - Catch-Up Contributions for 401(k)s, employer-sponsored plans, and IRAs begin. $7,500 for 401k ($30,500 total), $1,000 for IRAs ($8,000 total)
Age 55 -Certain employer-sponsored retirement plans allow distributions without penalty beginning at age 55. HSA contributions are now eligible for a $1,000/year additional catch up for those over age 55.