Your 401(k) is arguably the single most important tool for achieving long-term financial security, thanks to its powerful tax advantages and the potential for employer matching. This 10-question quiz is designed to test your knowledge on the core mechanisms of these accounts — from understanding pre-tax contributions and Roth benefits to grasping the concept of vesting.

And don’t worry if you miss an answer; you can follow the links below the quiz to brush up on your knowledge.