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A photo of a small business owner sitting in front of her plant shop texting on a smartphone.
Self-employment earnings don't have to be your only source of income to qualify for a solo 401(k).

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Tags
Personal Finance, Investing, Retirement, solo-401k, personal-finance-insider, pfi-reference, pfi-freelance, pfi-storytelling
Source
Solo 401(k): Contribution limits, eligibility, pros and cons