• Your spouse is the primary earner
  • You had a 1099 side-job earning $15k
  • You put all $15k in a solo-401(k) plan

Would you earn any social security credits in this situation?

  • 1
    Why do you call it a side job? Isn't it your only income? Jul 7, 2022 at 12:35

1 Answer 1


You'll need to pay self-employment tax, so you can't put all the $15K in 401k. Half of the SE tax is a deduction from your self-employment income (See the IRS website). Contributing to 401k plan only defers the income tax.

Self-employment tax is what determines how many SSA credits you get from self-employment (since the income taxable under SE tax is the income reported to the SSA).

What you do with the income is entirely up to you and you can do with it whatever you want, including contributing it into tax-deferred accounts if allowed.

  • Oh yeah, this seems obvious in retrospect. Of course Social Security credits would be based on how much social security tax you paid, which you're still paying if you put all the leftover money in a 401(k). Thank you!
    – Philip
    Jul 7, 2022 at 18:50

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