Can I open a Solo 401(k) if I am an independent contractor but also work part-time as an employee?
I'm in a similar situation as I have a consulting business in addition to my regular IT job.  I called the company who has my IRA to ask about setting up the Individual 401k and also mentioned that I contribute to my employer's 401k plan. The rep was glad I brought this up because he said the IRS has a limit on how much you can contribute to BOTH plans. For me it would be $24K max (myAge >= 50; If you are younger than 50, then the limit might be lower). He said the IRS penalties can be steep if you exceed the limit. I don't know if this is an issue for you, but it's something you need to consider. Be sure to ask your brokerage firm before you start the process.