If I have an individual 401K for 1099 income and a employer sponsored 401K for my W2 income, can I fund them both? Turbo Tax is allowing this ($18K in each) but I am ske

[dmertz · Accepted solution]

It's a listed limitation of TurboTax that TurboTax's Maximize function cannot be relied upon when elective deferrals are also made to another employer's plan.

In this case, since the maximum elective deferral was already made to the plan of the employer that provided the W-2, no elective deferrals can be made to the individual 401(k).  Only the profit-sharing contribution can be made.  You can get TurboTax to calculate the maximum employer contribution by using the Maximize function for a Keogh or SEP contribution instead of the one for an individual 401(k).

[Critter]

A business owner who is also employed by a second company and participating in its 401(k) plan should bear in mind that his limits on elective deferrals are by person, not by plan. He must consider the limit for all elective deferrals he makes during a year.

https://www.irs.gov/Retirement-Plans/One-Participant-401(k)-Plans