Anyone actually doing this successfully? How are you contributing to the after tax account?
My 401k is with Fidelity.
401k Account -> "Change Contributions" -> "Contribution Amount"
It then presents me with %-of-salary options for each of Pre-Tax, Roth, and After-Tax contribution types.
Below the input-boxes for the percentages, there's another section for Roth Conversion, in which I've chosen to have my After-Tax contributions converted to Roth on a daily basis.
... so if you're not seeing that, then either it's not offered (despite what you read?), or maybe it's not set up correctly between Fidelity and DW's workplace.
Am I missing something?
1. Max out 401k
2. Contribute additional $$,$$$ to an after tax account
3. Make in-service withdraw/rollover to Roth IRA
#1 is not related to #2/#3. Meaning that you can do after-tax and Roth conversions first, if you like. There's no dependency/ordering issue.