If you're a Colorado employer, 2026 just became the year where "flying under the radar" officially...
Castle Rock PEP vs. Traditional 401(k) vs. Colorado SecureSavings: Which Is Right for Your Business?

As we navigate the middle of 2026, the retirement landscape for Colorado business owners has never been more complex, or more critical. With state mandates now fully in effect and employee expectations for robust benefits at an all-time high, choosing the right retirement vehicle isn't just a financial decision; it's a strategic move for talent retention and business longevity.
Whether you are a growing startup with five employees or an established firm with 500, you likely find yourself weighing three primary options: the Colorado SecureSavings program, a Traditional 401(k), or the modern Castle Rock Pooled Employer Plan (PEP).
Each has its merits, but they are built for very different goals. This guide breaks down the "what," "why," and "how" of each choice to help you find the perfect fit for your team and your bottom line.
Roots: A Vision for Better Retirement (2006–2013)
To understand where we are in 2026, we have to look back at how we got here. Castle Rock Investment Company wasn't born out of a desire to just "sell products." It was founded in April 2006 by Michele Suriano with a clear mission: to provide high-quality, fiduciary-led retirement solutions to businesses that were often overlooked by the "big box" providers.

Back in 2006, the retirement industry was a different world. Small business owners were often stuck with high-fee plans and little to no personalized support. Michele, coming from a background at T. Rowe Price and Ceridian, saw an opportunity to bring institutional-quality investments and genuine fiduciary care to the local community.
By 2007, she was already serving on the board of the Western Pension & Benefit Council (WP&BC) Denver Chapter, a role she held through 2013. This era was defined by a commitment to education and advocacy, laying the groundwork for what would eventually become the Castle Rock PEP. We didn't just want to manage plans; we wanted to change how employees experienced retirement planning.
Evolution: From Complex 401(k)s to the Pooled Employer Plan
For years, the Traditional 401(k) was the gold standard. It offered high contribution limits and the ability for employers to match contributions, a powerful tool for attracting top talent. However, it came with a heavy burden: the employer acted as the primary fiduciary, meaning they were legally responsible for every investment choice and administrative detail.
As the years progressed, the "admin headache" became a major deterrent for small and mid-sized businesses. Audit requirements for plans with over 100 participants added thousands of dollars in annual costs, and the compliance oversight required a level of expertise that most HR leaders simply didn't have the time to master.
This led to the "Evolution" phase. With the passage of the SECURE Act, a new path opened: the Pooled Employer Plan (PEP). We saw this as the ultimate solution, a way to "pool" multiple employers together into a single plan. By doing so, we could deliver economies of scale that were previously only available to Fortune 500 companies. The Castle Rock PEP was designed to strip away the administrative burden and audit costs, while keeping the high contribution limits and matching capabilities that make 401(k)s so valuable.
The Big Three: A Side-by-Side Comparison
When you're choosing a plan in 2026, you're looking at three distinct paths. Colorado SecureSavings is often viewed as the "easy" choice, while the Traditional 401(k) is the "classic" choice. The Castle Rock PEP, however, is the "smart" choice for businesses that want maximum benefit with minimum stress.
| Feature | Castle Rock PEP | Traditional 401(k) | Colorado SecureSavings |
|---|---|---|---|
| Plan type | Pooled Employer Plan (shared 401(k)) | Single-employer 401(k) | State-mandated Roth IRA |
| Who runs it | Castle Rock PEP (outsourced fiduciary) | You (or your TPA) | State of Colorado (Vestwell/BNY Mellon) |
| Fiduciary liability | Handled by Castle Rock PEP | Falls on the employer | None , employer is not a fiduciary |
| Administration | Fully outsourced | Self-managed or hired TPA | Minimal , payroll deduction only |
| Audit requirement | Single plan audit (cost shared, no separate audit fees) | Separate audit required for 100+ eligible participants | No audit required |
| Employer can contribute/match? | ✅ Yes , fully customizable | ✅ Yes | ❌ No |
| Contribution limits | High ($24,500 + $8,000 catch-up in 2026) | High ($24,500 + $8,000 catch-up) | Low (IRA limits , $7,500 + $1,100 catch-up) |
| Investment options | Institutional-quality (Vanguard, etc.) | Varies by provider | Pre-selected state options |
| Personalized investment advice | ✅ Included | ❌ Typically extra cost | ❌ Not available |
| Financial planning software | ✅ Free for participants | ❌ Usually not included | ❌ Not available |
| Plan customization | ✅ High , matching, vesting, loans | ✅ High | ❌ None , one-size-fits-all |
| Cost to employer | Low (shared economies of scale) | Moderate to high (fees, admin, audit) | Free |
| Tax credits available | ✅ Yes (startup, auto-enroll, contributions) | ✅ Yes | ❌ No |
The "Free" Trap of Colorado SecureSavings
Colorado SecureSavings is the state's way of ensuring every worker has access to a retirement account. It is "free" for the employer to set up, but it is highly limited. It is a Roth IRA, not a 401(k). This means:
- Low Limits: Employees can only save a fraction of what they could in a PEP.
- No Matching: You cannot contribute to your employees' futures, which is a major disadvantage when competing for talent.
- No Advice: Employees are left to navigate their investments alone.
The Traditional 401(k) Burden
A Traditional 401(k) is powerful but places the "fiduciary target" squarely on your back. You are responsible for selecting the investments, monitoring fees, and ensuring the plan stays compliant with ever-changing IRS and DOL regulations. For many business owners, the "clock is ticking" on compliance deadlines, leading to unnecessary stress and potential fines.
The Castle Rock PEP Advantage
The Castle Rock PEP combines the power of a 401(k) with the simplicity of the state program. We take on the fiduciary liability, we handle the administration, and because we pool assets, we eliminate the need for you to pay for a separate plan audit. It's the best of both worlds.
The AI Crew: A 2026 Twist on Support
In 2026, we don't just rely on spreadsheets and phone calls. The "AI Crew" at Castle Rock PEP represents our integration of cutting-edge technology with human expertise. While some providers use AI to replace human interaction, we use it to enhance it.

Our proprietary AI-driven platform allows us to offer:
- Free Financial Planning Software: Every participant in the Castle Rock PEP gets access to advanced planning tools that were once reserved for high-net-worth individuals.
- Proactive Compliance Oversight: Our systems monitor your plan in real-time, identifying potential issues before they become "burdens," allowing us to stay ahead of regulatory shifts.
- Personalized Advice at Scale: We use data-driven insights to provide each employee with personalized investment advice, helping them understand exactly how to reach their retirement goals.
This isn't just about "tech": it's about "peace of mind." It's about knowing that while the systems are handling the heavy lifting, our experienced team is always here to provide the human touch.
Industry Partners: Decades of Community Impact
Our commitment to the industry remains as strong today as it was when Michele first joined the WP&BC board in 2007. We believe in the power of partnership. By working with world-class providers like Slavic401k and utilizing Vanguard Target Retirement Funds, we ensure that our clients have access to the very best the industry has to offer.
We also believe in supporting the local business community. Through our "Business Spotlights," we highlight the incredible companies that make up the Castle Rock PEP family. We don't just see ourselves as your retirement plan provider; we see ourselves as your partner in growth.
Our history is built on these relationships: from the 2006 founding to our 20th-anniversary celebrations this year in 2026. We've seen the industry evolve, and we've evolved with it to ensure you always stay ahead.

Which Is Right for You?
Choosing a plan depends on your business goals:
- If you just want the absolute cheapest way to comply with state law and don't care about matching or high savings limits, Colorado SecureSavings is your baseline.
- If you have a massive HR department and want total, granular control over every tiny detail (and don't mind the audit costs), a Traditional 401(k) might work.
- If you want a high-performance, competitive benefit that attracts the best talent, eliminates your fiduciary risk, and removes the administrative burden: all at a lower cost through pooling: then the Castle Rock PEP is the clear winner.
Building a secure future for your employees is a "lasting impact" you can make today. Don't let compliance feel like a burden; let it be the opportunity to level up your business.
Ready to simplify your retirement plan?
Let's talk about how the Castle Rock PEP can work for your specific needs. Confirm your Roth availability, draft clear notices for your team, and take the first step toward a better retirement solution.
Schedule your "PEP Talk" with our team today!
Simplifying retirement for all. One plan. Every business.
This content was prepared with the assistance of artificial intelligence tools and reviewed by Castle Rock Investment Company for accuracy and completeness.