This post provides real-world examples of why smart solopreneurs choose to open a Solo 401k instead of a SEP IRA.
| Feature Comparison | Solo 401k | SEP IRA |
|---|---|---|
| 2025 Contribution Limit | $70,000 ($77,500 if age 50+ OR $81,250 if age 60-63) | 25% of compensation up to $70,000 |
| Mega Backdoor Roth | Yes | No |
| Loan | Up to $50,000 or 50% of Plan Value | No |
| Alternative Investments
With Checkbook Control |
Yes | No |
| Tax Credit Available | Yes – $1,500 | No |
Case Study #1: The Frugal Investor
Profile: Sarah, Independent Consultant
Annual Income: $150,000
Primary Concern: Minimizing fees while maximizing retirement savings
Sarah switched from a SEP IRA to a Solo 401k after calculating that asset-based fees were costing her more as her account grew. With a Solo 401k from My Solo 401k Financial she only pays a flat $125 annual fee and qualifies for a $1,500 tax credit.
Case Study #2: The Roth Maximizer
Profile: Michael, Tech Entrepreneur
Annual Income: $225,000
Primary Concern: Tax diversification and future tax-free growth
Michael wanted Mega Backdoor Roth contribution options that weren’t available with his SEP IRA. By switching to a Solo 401k, he can now make both traditional and Roth contributions, plus utilize the Mega Backdoor Roth strategy for additional tax-free growth potential.
Case Study #3: The Large Account Holder
Profile: Patricia, Medical Practice Owner
Annual Income: $400,000
Primary Concern: Compliance and reporting requirements
With retirement assets exceeding $250,000, Patricia needed Form 5500-EZ filing support. My Solo 401k Financial handles this at no additional cost, while her previous SEP IRA administrator charged extra for compliance assistance.
Case Study #4: The Alternative Investor
Profile: Robert, Real Estate Professional
Annual Income: $175,000
Primary Concern: Investment flexibility for real estate and private placements
Robert’s Solo 401k allows him to invest in real estate and private placements with checkbook control allowing him to act quickly when investment opportunities arise.
Case Study #5: The “Rainy Day” Planner
Profile: Lisa, E-commerce Business Owner
Annual Income: $200,000
Primary Concern: Access to funds if needed
Lisa values the ability to take loans from her Solo 401k without penalties or credit checks – a feature unavailable with SEP IRAs. This flexibility provided peace of mind when she needed capital for business expansion.
Key Takeaways from the Case Studies
- Lower fees and tax credits make the Solo 401k cost-effective for many users
- Mega Backdoor Roth options provide valuable tax diversification not available with SEP IRAs
- Compliance support for larger Solo 401k accounts
- More investment flexibility, especially for alternative investments
- Loan provisions provide valuable financial flexibility
Note: This information is provided for educational purposes only. Consult with your tax attorney and financial professional when making retirement planning decisions.
