If your 401(k) plan allows in-service distributions, you can convert pre-tax savings to a Roth IRA while still working—giving you a head start on building tax-free retirement income. This strategy lets your money grow tax-free, with no required minimum distributions later. You don’t have to convert everything at once; spreading conversions over several years helps manage taxes. It’s a smart move for high earners or anyone planning long-term retirement growth.