Understanding the key differences between these two retirement plan options for self-employed professionals.
A Solo 401(k) is a retirement plan for self-employed individuals and business owners with no employees other than a spouse. It allows contributions as both employee and employer.
Higher contribution potential
Participant loans permitted
Roth option available
Employee and employer contributions
A Simplified Employee Pension (SEP) IRA is a retirement plan that allows employers to make contributions to traditional IRAs set up for employees, including themselves.
Employer contributions only
Simple to establish and maintain
Flexible annual contributions
No annual filing requirements
Contribution limits are subject to annual IRS adjustments. Consult with a tax professional for personalized guidance.
Solo 401(k) plans can include a Roth option, allowing you to make after-tax contributions with the potential for tax-free growth and qualified distributions.
Roth employee deferrals available
Tax-free qualified distributions
Can split between traditional and Roth
Mega Backdoor Roth strategy possible
SEP IRAs do not offer a Roth option. All contributions are made on a pre-tax basis and distributions are taxed as ordinary income.
No Roth option available
All contributions are pre-tax only
Can convert to Roth IRA (taxable event)
Traditional IRA benefits apply
Participant loans are available within the plan, subject to plan provisions and IRS regulations. You can borrow up to $50,000 or 50% of your vested balance, whichever is less.
Loans are not permitted from SEP IRAs. Early withdrawals before age 59½ are subject to income tax and a 10% early withdrawal penalty, with limited exceptions.
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You want to maximize contributions beyond what employer contributions alone allow
You're interested in making Roth contributions for tax diversification
You may want the option to take participant loans from your plan
You're age 50+ and want to take advantage of catch-up contributions
You're comfortable with slightly more complex plan administration
You prefer a simpler, easier-to-maintain retirement plan structure
Your income varies significantly year to year and you want contribution flexibility
You want to avoid annual filing requirements (Form 5500-EZ)
Employer contributions alone will meet your retirement savings needs
You value administrative simplicity and lower maintenance requirements
Schedule a consultation to discuss your Solo 401(k) questions and explore whether this
retirement plan structure is right for you.
Disclaimer: This website provides educational information only and does not constitute tax, legal, or investment advice. Please consult with qualified professionals regarding your specific situation. Solo 401(k) plans may not be suitable for all individuals.
