I participate in a solo 401k plan through my LLC which is taxed as an S-corporation. Can I put 100% of my wages ito the Roth bucket of the solo 401k plan?
Solo 401k annual contributions are capped on a yearly basis. For 2020 for example, the maximum solo 401k annual contribution is $57,000 and you cannot contribute more than you make. Therefore, if your goal for 2020 is to solely make Roth solo 401k contributions, and you pay yourself at least $57,000 of W-2 wages through the LLC that sponsors the solo 401k plan, you can contribute the full $57,000 if you have a solo 401k plan which supports the Mega Backdoor Roth contributions.