Yes, you can convert a 401(k) to a Roth IRA, usually by rolling it over after leaving your job or sometimes while still employed if your plan allows it. The conversion is taxable because Roth IRAs are funded with after-tax money, so you’ll owe income tax on the amount converted. Once converted, qualified withdrawals in retirement are tax-free. It’s a good idea to check your plan rules and consider speaking with a financial advisor about the tax impact.