What are the tax consequences of moving a 401k to a Roth IRA?

When you move a 401(k) to a Roth IRA, it is considered a Roth conversion, which means you'll owe income tax on the pre-tax contributions and earnings in your 401(k) for the year of the conversion. This can potentially push you into a higher tax bracket. However, once the funds are in the Roth IRA, they grow tax-free, and qualified withdrawals in retirement are also tax-free. It's important to plan for the tax implications and consider your current and future tax situation before making the move.