Leaving a job? Your 401(k) can stay, move to a new plan, roll into an IRA, convert to Roth, or be cashed out. Here's how each option works and what it costs.

Some 401(k) plans let you move tens of thousands of dollars a year into Roth through after-tax contributions. Here's how the mega backdoor Roth works and how to check your plan.

Income too high for a Roth IRA? The backdoor Roth is the legal second path. Here's why I use it, how the mechanics work, and how to file it correctly.

Roth IRA and Roth 401(k) are both Roth, but the limits, income rules, and access to your money differ. Here's how they compare and how to decide which to fund first.

Traditional or Roth? The real question is when you pay the tax. Here's the math, what points the answer one way or the other, and how it applies to your 401(k) and IRA.