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Contribute to both a SEP IRA and solo Roth 401(k)?
In addition to the normal limits, A Solo 401(k) allows you to contribute up to 20% of net profits (sole proprietor) or 50% of salary (if a corporation), up to $49,000. Note that the fees for 401(k) accounts are higher than with the IRA. See 401(k)s for small business.