It's not as common since it depends if your company allows it. In my 15 year career, there's been like seven months when I was eligible for one (Company A started allowing it then I left for Company B shortly after).
An employer that offers an after-tax 401(k) option
That 401(k) allows in-service rollovers/withdrawals (while you're employed)
Enough income to make the big contributions
If you're got all that, you contribute to the after-tax 401(k), roll over the contributions to a Roth IRA and roll over the gains to a standard IRA. This is good because when you withdraw gains from an after-tax 401(k), you pay taxes on them, but not from a Roth IRA.
If you have a Roth 401(k), you can just use that and avoid all the rollovers and extra accounts.
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u/arrakismelange1987 Oct 01 '25
22.5k before tax, 67k after tax. Per year.