Understanding PPP Service Models: Bundled vs. Open Architecture

Understanding PPP Service Models: Bundled vs. Open Architecture

Public and private employers adopting a Pooled Employer Plan (PEP) rely on a Pooled Plan Provider (PPP) to deliver a streamlined, compliant, and cost-effective retirement program. Since the SECURE Act introduced PEPs and modernized the Multiple Employer Plan (MEP) landscape, plan sponsors have had more choice—but also more complexity—in how to structure their 401(k) plan structure and partner with providers. One of the most consequential choices is the selection of a PPP service model: bundled or open architecture. Each strategy has trade-offs across cost, flexibility, Plan governance, ERISA compliance, and fiduciary oversight. Understanding those differences is essential to building a PEP that fits your organization’s goals and risk tolerance.

What is a PPP—and why the model matters A PPP is the entity responsible for administering a PEP and ensuring the plan meets ERISA compliance requirements. The PPP typically assumes significant fiduciary responsibilities, coordinates Retirement plan administration, and manages the consolidated plan administration across participating employers. Because PEPs pool participants and assets from multiple adopting employers, the PPP’s operating model directly affects scalability, pricing, investment access, recordkeeping quality, and the day-to-day experience for HR and payroll teams.

The SECURE Act allowed unrelated employers to band together under a single https://targetretirementsolutions.com/contact-us/ plan, reducing duplicative audits, filings, and vendor relationships that previously accompanied standalone plans. With that opportunity comes the need to select a service approach that aligns with each employer’s appetite for customization and control. That’s where bundled and open architecture models diverge.

Defining the bundled model In a bundled PPP model, one primary provider—or affiliated group—delivers most core services under a single, integrated contract. This typically includes recordkeeping, trustee or custodial services, investment fund lineup (often proprietary or preferred), participant services, data connectivity, and plan document support. Some PPPs in a bundled approach also provide 3(16) administrative fiduciary services and 3(38) investment fiduciary oversight, creating a single point of accountability.

Key characteristics:

Single vendor ecosystem: The PPP’s affiliated recordkeeper, custodian, and investment platform are pre-integrated. Streamlined implementation: Employer onboarding, payroll integration, and eligibility tracking tend to be faster. Economies of scale: Pricing may be competitive due to volume discounts, consolidated service delivery, and consistent operational standards. Curated investment menu: Fund selection may favor proprietary or limited menus to support operational efficiency and pricing.

Advantages:

Simplicity and speed. Bundled models reduce vendor coordination, easing adoption for employers new to a PEP. Unified service model. Fewer handoffs can lower errors and improve Retirement plan administration. Clear accountability. With one lead provider, escalation paths and service-level ownership are straightforward.

Trade-offs:

Less flexibility. Employers may have limited choice in investment options, managed accounts, or capital preservation vehicles. Potential conflicts of interest. Proprietary products can create perceived or actual conflicts, requiring strong fiduciary oversight and transparent fee benchmarking. Portability constraints. Switching components (e.g., the recordkeeper) may require moving the entire PEP or exiting to a standalone plan.

Defining the open architecture model Open architecture PPPs aim to separate core functions, allowing the PEP to select best-in-class providers for each layer—recordkeeping, custody, investment management, advice, and oversight—within a neutral framework. The PPP still centralizes plan governance and ERISA compliance but offers broader selection and modularity.

Key characteristics:

Vendor flexibility: The PPP partners with multiple recordkeepers, custodians, and investment platforms or maintains an “open shelf” for funds and models. Customization: Employers or the PPP’s investment fiduciary can design lineups across passive, active, CITs, and ETFs without proprietary bias. Interoperability: Data standards and integrations are designed to accommodate multiple providers while maintaining consolidated plan administration.

Advantages:

Flexibility and choice. Better alignment with employer preferences, industry verticals, and participant demographics. Competitive tension. Multiple providers can drive better pricing and innovation. Investment breadth. Access to institutional share classes, specialty strategies, and white-label structures.

Trade-offs:

Complexity. More vendors mean more interfaces to manage, which can complicate Retirement plan administration if not well-orchestrated. Diffused accountability. Clear delineation of roles in service agreements is crucial to avoid service gaps. Implementation time. Integrations, data mapping, and fiduciary documentation may take longer upfront.

Comparing bundled vs. open architecture across key dimensions

Cost structure: Bundled: Often features packaged pricing with predictable per-participant fees; may include revenue sharing. Evaluate all-in costs, not just headline rates. Open architecture: Pricing can be unbundled with transparent component fees. Potentially lower investment costs, but integration and oversight may add basis points. Plan governance and fiduciary oversight: Bundled: A single PPP may serve as ERISA 3(16) administrator and appoint a 3(38) investment manager. Ensure conflict-mitigation controls, investment policy governance, and periodic independent fee benchmarking. Open architecture: Governance frameworks should clarify how the PPP, 3(16), and 3(38) (if any) intersect. Investment committees may have broader discretion and must maintain a robust IPS and documentation. ERISA compliance and operations: Bundled: Standardized procedures for eligibility, loans, QDROs, and distributions reduce variability and audit risk. Strong fit for employers seeking a turnkey 401(k) plan structure within a PEP. Open architecture: Requires tight operational playbooks and service-level agreements to maintain consistency across vendors. The PPP must evidence control over ERISA timelines and error correction. Participant experience: Bundled: Consistent digital experience, call center, and communications program. Managed accounts and advice may be proprietary. Open architecture: Potentially richer features and financial wellness tools, but UX uniformity depends on chosen recordkeeper(s). Portability and future-proofing: Bundled: Efficient today but harder to change components later. Open architecture: Easier to swap providers or strategies as needs evolve.

Choosing the right PPP model for your organization Start with governance priorities. If your leadership prioritizes simplicity, speed, and single-point accountability, a bundled PPP can be compelling—especially for smaller employers or those new to PEPs. If your organization values investment flexibility, fee transparency, and the ability to tailor services, an open architecture PPP may be a better fit.

Conduct due diligence with a structured lens:

Clarify fiduciary roles. Identify who serves as 3(16), 3(38), trustee, and named fiduciary. Confirm how investment decisions are made and documented. Evaluate all-in fees. Aggregate recordkeeping, custody, advisory, investment expense ratios, and any wrap fees. Compare to peer PEPs and traditional MEPs. Review operational controls. Assess payroll integration, eligibility tracking, loan processing, error resolution, and cybersecurity. Ask for SOC 1/SOC 2 reports and correction policies. Scrutinize investment architecture. Determine menu construction, share class access, CIT availability, revenue policy, and default options (e.g., target-date strategies). Test participant support. Look at financial wellness, rollover assistance, multilingual support, and retirement income tools. Consider exit options. Understand how an adopting employer can spin out to a standalone 401(k) or move to another PEP without disrupting participants.

How MEPs compare While the SECURE Act elevated PEPs by removing the “common nexus” requirement and reducing the “one bad apple” risk, some employers still consider a Multiple Employer Plan. MEPs can be attractive for associations or related employers with shared interests, but they often entail more shared governance among participating employers. PEPs, led by a PPP, typically centralize more responsibilities, simplifying compliance and consolidated plan administration. When comparing, focus on the distribution of fiduciary duties, audit scope, and the capacity to scale.

Common pitfalls to avoid

Overemphasizing sticker price. Evaluate total cost and the value of reduced administrative burden and fiduciary risk. Ignoring conflicts. Require disclosure of revenue sharing, float, proprietary products, and compensation arrangements. Vague SLAs. Insist on measurable performance standards for loans, hardship withdrawals, payroll timing, and error correction. Thin documentation. Ensure your investment policy statement, committee charters, and fiduciary files match the chosen model.

Bottom line Both bundled and open architecture PPP models can deliver strong outcomes within a Pooled Employer Plan. The best choice hinges on your organization’s need for simplicity versus flexibility, your tolerance for vendor coordination, and the importance you place on investment breadth and fee transparency. With disciplined due diligence and clear Plan governance, either path can support ERISA compliance, reduce workload, and provide a modern 401(k) plan structure for your workforce.

Questions and Answers

Q1: Does a bundled PPP always cost less than an open architecture PPP? A: Not always. Bundled pricing can appear lower due to packaging, but proprietary investments or revenue sharing may offset savings. Open architecture may deliver lower investment costs but add fees for integration and oversight. Compare all-in expenses.

Q2: Who is responsible for fiduciary oversight in a PEP? A: The PPP typically serves as the ERISA 3(16) administrator and may appoint a 3(38) investment manager. Your service agreement should clearly define roles among the PPP, trustee, recordkeeper, and any advisors.

Q3: Can employers customize investments in a bundled model? A: Often to a limited degree. Some bundled PPPs allow select non-proprietary funds, but open architecture generally provides broader choice, including CITs, passive/active blends, and custom white-label options.

Q4: How does consolidated plan administration reduce workload? A: The PPP centralizes annual filings, audit coordination, document maintenance, and operational oversight across all adopting employers, reducing duplicative tasks and improving consistency.

Q5: What if we need to change recordkeepers later? A: In a bundled model, switching the recordkeeper may require moving the entire PEP or exiting to a standalone plan. Open architecture designs are more likely to support component changes with less disruption.