Why Your Solo 401(k) Provider Choice Affects Taxes, Control, and Flexibility
Solo 401(k) plans remain one of the most powerful retirement vehicles for self-employed individuals because:
- They let you contribute as both employer and employee, boosting tax-advantaged savings.
- Some plans now include Roth 401(k) features and loan capabilities that many SEP IRAs don’t offer.
- Providers range from major brokerages with limited options to self-directed specialists with near-unlimited investment flexibility, and your needs will dictate the ideal choice.
Understanding which questions to ask helps you avoid hidden costs, limited features, and administrative headaches when it comes to selecting a Solo 401(k) provider.
Key Takeaways
- Choosing the right Solo 401(k) provider matters because features, fees, and flexibility vary widely, especially between mainstream brokerages and self-directed administrators.
- Beyond basic cost and investment access, plan features like loans, Roth options, and investment breadth often make the biggest long-term impact.
- Your business structure and retirement strategy (e.g., real estate investing, aggressive saving, or loan access) should drive provider choice more than brand name.
- This scorecard centers on questions you should ask, instead of vendor ratings, so you can compare apples to apples when talking to providers.
15 Must-Ask Questions Before Choosing a Solo 401(k) Provider
1. What Investment Options Does the Plan Support?
Does the provider limit investments to stocks, ETFs, and mutual funds, or allow alternative assets (real estate, private equity, crypto)?
2. Does the Plan Support Self-Directed Investing?
Self-Directed Solo 401(k) plans can allow more asset types and checkbook control, ask if this is an option.
3. Are Roth 401(k) Contributions Supported?
Not all providers allow Roth designations; if tax-free retirement distributions matter, this is crucial.
4. Is a Loan Feature Available?
Some Solo 401(k) plans let you borrow up to $50,000 or 50% of your balance. Ask if 401(k) loans are allowed and what the terms are.
5. What Are the Setup and Ongoing Fees?
Beyond management fees, clarify setup, annual maintenance, transaction, and termination charges.
6. How Easy Is Account Setup and Funding?
Ask whether contributions can be automated or if manual funding (with potential paperwork) is required.
7. Is There Support for Rollovers From Other Plans?
Can you bring in assets from existing 401(k)s, IRAs, or other qualified plans with minimal hassle?
8. What Administrative and Compliance Support Is Included?
Does the provider handle IRS filing requirements (like Form 5500 if assets exceed thresholds), compliance testing, and plan updates?
9. Are In-Service Distributions Allowed?
This matters if you plan to move after-tax or voluntary contributions into a Roth IRA mid-career.
10. What Control Do You Have Over Custody and Brokerage Selection?
Some plans lock you into a specific custodian/broker; others let you bring your own.
11. Are There Investment Minimums or Restrictions?
Check whether there are minimum balances or restrictions on certain asset types.
12. What Technology and Platform Features Are Provided?
Access to mobile apps, online trading tools, and real-time account views can significantly impact usability.
13. What Customer Service and Advisory Support Do You Get?
Not all providers offer financial advice; clarify whether support is educational, administrative, or advisory.
14. Are There Limits on Distributions and Withdrawals?
Understand how and when you can take distributions, especially for retirement timing.
15. What Happens if You Hire Employees?
Some providers may not support plan conversion if your business grows beyond owner-only (e.g., adding employees disqualifies a Solo 401(k)).
How Providers Compare: Key Feature Table
| Provider | Setup Fee | Annual Fee | Investment Options | Checkbook Control | Compliance and Support | Notes / Reputation |
|---|---|---|---|---|---|---|
| IRA Financial | $999 | $399 | Real estate, crypto, metals, private equity, promissory notes | Yes | Free plan updates, tax and consulting, 5500-EZ filing, audit protection, Mega Backdoor Roth | 27,000+ clients, 2,000+ 5-star reviews; full-service self-directed support |
| New Direction Trust Company | $30 | $425 | Real estate, promissory notes, metals | No | Limited; mostly custodial | BBB-accredited; mixed reviews; tiered fees can grow quickly |
| Broad Financial | $995 | $149 | Real estate, crypto, startups, crowdfunding, private lending, metals, private equity | Yes | Limited | Mostly positive reviews; operational support for alternatives but minimal compliance guidance |
| IRAR Trust | $0 | $899 | Real estate, promissory notes, private placements | Yes | Limited; mostly custodial | Experienced with real estate; higher annual fees and slower approvals |
| Rocket Dollar | Varies | Varies | Real estate, crypto, private placements | Yes | Operational guidance for alternative assets | Strong for real estate execution; itemized fees may apply |
| E*TRADE | Varies | Varies | Primarily traditional securities | No | Brokerage compliance; limited alternative support | Best for mainstream securities, not deep alternative-asset investing |
Alternative Assets in Solo 401(k) Plans
| Asset Type | Liquidity | Custodial/Compliance Needs | Tax/UBTI Considerations |
|---|---|---|---|
| Real estate | Low to medium | Clear title in plan name or LLC, property management segregation | Leveraged purchases may trigger UBTI; mortgage interest reporting required |
| Cryptocurrency | High volatility | Custodian wallet or provider-enabled crypto, secure key management | Standard tax treatment; trading inside plan is tax-deferred |
| Private placements / Private equity | Very low | Subscription docs, accredited-investor verification | Long-term capital appreciation; must follow prohibited-transaction rules |
| Precious metals | Low | IRS-approved storage, segregated custodial holding | Distributions taxed like other account assets; storage fees may apply |
Note: This table reflects general industry norms in 2026; specific offerings vary by provider.
Common Pitfalls to Avoid
- Assuming All Providers Offer the Same Features
Major brokerages may offer low fees but restrict investment options; ask before assuming broad flexibility.
- Overlooking Loan Availability
Missing this can cost you access to capital when you need it; clarify loan terms up front.
- Ignoring Administrative Burdens
Solo plans require simple IRS filings once assets exceed $250K, and verify support.
- Failing to Consider Future Growth
If you might hire employees, plan options and conversion pathways matter.
Final Tips Before You Decide
- Talk to multiple Solo 401(k) providers with the same questions, and compare apples to apples.
- Check out our list of the Top Solo 401(k) providers for 2026.
- Document the answers in writing so you can reference them later.
- Align the provider with your retirement strategy, not just costs.
About the Author
Adam Bergman is a tax attorney and the founder of IRA Financial, one of the largest Self-Directed IRA platforms in the United States. He has helped more than 27,000 clients take control of their retirement savings, overseeing over $5 billion in retirement assets. Adam is also the author of nine books focused on helping investors understand and confidently manage their retirement strategies.
