Empower vs Vanguard 401k: Which Wins at $5M+?

Empower vs Vanguard: What High-Net-Worth Investors Actually Need to Know

The Empower vs Vanguard decision looks straightforward until you realize the standard comparison misses the point entirely for anyone with serious money. At $5M+, your 401k is a tax-optimization vehicle first and a savings account second. The question isn't which platform has a better app. It's which provider's plan design supports mega backdoor Roth conversions, how their fee structures compound against a seven-figure balance, and whether either can serve you as a business owner who wants to maximize contributions without nondiscrimination testing headaches.

Here's the direct answer: Vanguard wins on cost structure due to its mutual ownership model. Empower wins on plan design flexibility and breadth of employer relationships. Neither is universally better. The right choice depends on whether you're evaluating as an employee, a business owner, or someone rolling over a large balance.

How Empower and Vanguard Actually Differ as Organizations

Understanding the ownership structure of each provider explains more about their long-term cost trajectory than any marketing comparison.

Vanguard operates under a mutual ownership model where the funds own the company. That structure creates a direct incentive to minimize costs that no for-profit competitor can replicate. The result: Vanguard Admiral Shares index funds carry expense ratios as low as 0.03% to 0.04%. That's not a promotional rate. It's structurally sustainable.

Empower is owned by Great-West Lifeco, a subsidiary of Power Corporation of Canada. It became the second-largest U.S. retirement plan provider by assets after acquiring Prudential Financial's retirement business in 2022 and MassMutual's retirement unit in 2020, giving it approximately 17 to 18 million participants. That scale matters for plan design and technology investment, but the profit motive is real and it shows up in fee structures for smaller plans.

The other structural difference worth knowing: Vanguard administers plans only for employers who specifically choose Vanguard as their provider. Empower functions as a third-party recordkeeper across a wide range of employer plans, often inherited through acquisitions. If you're an employee, you may have no choice between them. If you're a business owner, you do.

For business owners evaluating the largest retirement plan providers in the industry, this distinction shapes everything from plan design flexibility to fee negotiation leverage.

What Are the Expense Ratios for Empower vs Vanguard Index Funds?

Fee comparisons between these two providers require separating investment expenses from recordkeeping and administrative costs. Most articles conflate them. At $5M+, that conflation is expensive.

According to Morningstar's annual U.S. Fund Fee Study, asset-weighted average expense ratios for U.S. funds have declined to approximately 0.37%, with index funds averaging well below 0.10%. Both Empower and Vanguard can beat that average, but the gap between them widens at the plan level.

The compounding effect of that gap is not trivial. For a $5M retirement portfolio, a 0.25% difference in annual expense ratios compounds to over $500,000 in lost wealth over 20 years at a 7% gross annual return. Investment Company Institute research confirms that total plan costs, including recordkeeping, administration, and investment management, can range from 0.20% to over 1.00% of plan assets annually, with larger plans generally achieving lower per-participant costs.

If you're a business owner negotiating a new plan, Vanguard's cost floor is structurally lower. If your employer already uses Empower, the practical question is whether the institutional share classes available in your specific plan are competitive, not whether Empower's catalog is theoretically cheaper somewhere.

Is Empower or Vanguard Better for a High-Net-Worth 401k Rollover?

When you leave an employer, a rollover decision at $5M+ involves more than picking a platform. Tax treatment, investment access, and creditor protection all vary by destination.

Vanguard's IRA platform is the default recommendation for cost-conscious rollovers. Access to Admiral Shares, no account fees above certain asset thresholds, and a straightforward fund lineup make it a clean destination for a large pre-tax rollover. The tradeoff: fewer alternative investment options and a platform that prioritizes simplicity over customization.

Empower's rollover IRA offers broader fund access and more robust planning tools, but the advisory fee structure deserves scrutiny before you move a large balance. At 0.35% to 0.45% on managed accounts, that's $17,500 to $22,500 per year on a $5M rollover before you've bought a single fund.

One consideration that rarely appears in standard comparisons: rolling a large pre-tax 401k into a traditional IRA can complicate the backdoor Roth strategy for future years. The pro-rata rule applies to all traditional IRA balances when you convert. If you're still contributing to a backdoor Roth annually, keeping the rollover in a 401k format (either at a new employer or in a solo 401k) may be more tax-efficient than moving it to an IRA.

Review the 401(k) withdrawal rules and terms before initiating any rollover, particularly if you're between 55 and 59½ and may need penalty-free access.

What Is the Mega Backdoor Roth Limit and Which Providers Support It?

The mega backdoor Roth is the highest-impact tax strategy available inside a 401k for high earners. The mechanics: contribute after-tax (non-Roth) dollars up to the Section 415 total annual addition limit, then convert those dollars to Roth immediately. Under IRS rules, the total annual addition limit for 2024 is $69,000, or $76,500 with catch-up contributions for those 50 and older.

After your $23,000 pre-tax or Roth elective deferral and any employer match, the remaining space can be filled with after-tax contributions. For a business owner with no employer match, that's potentially $46,000 in after-tax contributions available for immediate Roth conversion, compounding tax-free indefinitely.

Two plan design features must be present for this to work:

1. The plan must allow after-tax (non-Roth) contributions
2. The plan must permit either in-service withdrawals or in-plan Roth conversions

Neither Empower nor Vanguard automatically includes these provisions. They are optional features that the employer must elect in the plan document. The provider's capability is necessary but not sufficient. If you're an employee, you need to ask your plan administrator whether both features are enabled. If you're a business owner, you need to instruct your plan document to include them.

Research published in the Journal of Financial Planning has examined how after-tax 401k contributions combined with in-plan Roth conversions can generate substantial tax-free compounding for high-income individuals, particularly those with long investment horizons. The math is compelling at high marginal rates.

Empower's platform generally supports both in-service withdrawals and in-plan Roth conversions when the employer plan document enables them. Vanguard's 401k platform also supports these features, but Vanguard's smaller employer footprint means fewer participants have access to Vanguard-administered plans with these provisions already in place.

Does Vanguard Offer Solo 401k Plans for Self-Employed Individuals?

Vanguard does offer solo 401(k) plans for self-employed individuals, but with meaningful limitations compared to competitors. Vanguard's individual 401k is straightforward and low-cost, but it does not support after-tax (non-Roth) contributions, which eliminates the mega backdoor Roth strategy entirely for self-employed individuals using Vanguard's solo 401k.

Empower does not offer a retail solo 401k product in the same way. Self-employed individuals typically access Empower through employer-sponsored plans rather than individual arrangements.

For self-employed FATFIRE individuals who want the full $69,000 annual addition limit with mega backdoor Roth capability, third-party providers like Fidelity (which supports after-tax contributions in its self-employed 401k) or specialized solo 401k administrators are worth evaluating alongside both Empower and Vanguard.

The IRS sets SEP-IRA contribution limits at 25% of compensation up to $69,000 in 2024, making SEP-IRAs a simpler alternative for self-employed individuals who don't need the Roth conversion feature. But SEP-IRAs don't allow employee Roth contributions or the mega backdoor strategy, so the solo 401k remains the more powerful vehicle for most high-income self-employed individuals.

Which Provider Is Better for Business Owners Seeking Safe Harbor Plan Design?

Safe harbor 401k plan design allows business owners to maximize their own contributions without passing annual nondiscrimination testing. According to IRS guidance on safe harbor 401k plans, this structure lets highly compensated employees, including owner-employees, contribute the full elective deferral limit regardless of what rank-and-file employees contribute, as long as the employer provides a qualifying match or nonelective contribution.

For a FATFIRE business owner who wants to contribute the full $69,000 annual limit (including profit-sharing), safe harbor design is often the prerequisite.

Empower's broader third-party administrator (TPA) relationships give it an edge for business owners who want highly customized plan documents. Vanguard's employer plan offerings are more standardized, which keeps costs low but limits design flexibility.

If your primary goal is minimizing investment costs and your plan design needs are straightforward, Vanguard is the cleaner choice. If you need a plan document that supports multiple contribution types, in-service distributions, and Roth conversion features simultaneously, Empower's ecosystem of TPA partners is more accommodating.

How SECURE 2.0 Changes the Empower vs Vanguard Calculus for High Earners

SECURE 2.0, enacted as part of the Consolidated Appropriations Act of 2023, introduced two provisions that directly affect high-earning FATFIRE individuals and require both providers to adapt their systems.

First, starting in 2026, catch-up contributions for participants aged 50 and older who earned more than $145,000 in the prior year must be made as Roth (after-tax) contributions rather than pre-tax. This mandatory Roth catch-up provision eliminates the pre-tax catch-up option for high earners entirely. The IRS acknowledged implementation challenges in Notice 2023-75 and provided a two-year administrative transition period, but the requirement takes effect for plan years beginning after December 31, 2025.

Second, SECURE 2.0 introduced higher catch-up contribution limits for participants aged 60 to 63, set at $10,000 or 150% of the regular catch-up limit, whichever is greater, starting in 2025. That's a meaningful additional contribution window for FATFIRE individuals in that age bracket.

Both Empower and Vanguard are updating their plan administration systems to accommodate these changes. The practical question for plan sponsors is whether your provider will have compliant systems in place before the 2026 deadline, and whether they will communicate the change clearly to affected participants.

For business owners, the mandatory Roth catch-up provision also affects plan document language. Plans that currently allow pre-tax catch-up contributions will need amendments. Verify with your plan administrator, whether Empower or Vanguard, that this is on their compliance roadmap.

Target-Date Funds: How Empower vs Vanguard Compare for Large Balances

Target-date funds are the default investment for most 401k participants, which means the quality and cost of these funds matter at scale. Vanguard's Target Retirement series is among the most-cited benchmarks in the industry, with expense ratios typically in the 0.08% to 0.15% range for institutional shares.

Empower offers target-date funds from multiple providers, including its own MyPath series, as well as access to Vanguard, Fidelity, and other fund families depending on the plan. That flexibility is useful for plan sponsors who want to offer participants a choice, but it also means the quality of target-date options varies significantly by plan.

For a detailed comparison of target date fund options across providers, the key metrics to evaluate are the expense ratio, the glide path (how aggressively the fund shifts to bonds as you approach retirement), and the underlying fund composition.

Vanguard's How America Saves 2024 report documents that plan design features like auto-enrollment and target-date fund adoption rates vary significantly by plan sponsor size, with larger plans showing higher rates of participant engagement and better outcomes. That data supports the case for choosing a provider whose default options are genuinely low-cost, since most participants never change their defaults.

For FATFIRE individuals with large 401k balances, age-based asset allocation strategies deserve more customization than any target-date fund provides. At $5M+, the tax location of your assets across taxable, traditional, and Roth accounts matters more than the glide path inside a single fund.

Beyond 401k Limits: Advanced Strategies That Work With Either Provider

The $23,000 annual elective deferral limit (2024) is a rounding error against a $5M+ portfolio. The 401k's real value at this level is the tax shelter it provides for assets that would otherwise compound in a taxable account, and the mega backdoor Roth opportunity described above.

The tax-advantaged account stack for a high-income FATFIRE individual looks like this:

The IRS sets the total annual addition limit under IRC Section 415 at $69,000 for 2024, which is the ceiling that governs the mega backdoor Roth opportunity. Everything above the elective deferral limit, including employer contributions and after-tax contributions, counts against this ceiling.

For dynamic spending strategies for retirement that coordinate across these account types, the sequencing of withdrawals matters as much as the accumulation strategy. Roth assets should generally be the last you touch, which makes the mega backdoor Roth contributions made today worth significantly more than their face value.

Evaluating Empower vs Vanguard for a Large Balance Rollover or Consolidation

If you're consolidating multiple old 401k accounts or rolling a large balance, the platform experience and advisory fee structure deserve more scrutiny than the fund lineup.

Vanguard's Personal Advisor Services charges 0.30% annually with a $50,000 minimum. On a $5M rollover, that's $15,000 per year for access to human advisors layered on top of automated portfolio management. The service is competent for straightforward situations, but it's not designed for the complexity of a FATFIRE balance sheet that includes concentrated positions, alternative investments, or multi-entity tax structures.

Empower's managed account service charges approximately 0.35% to 0.45% of assets annually, on top of underlying fund expenses. On the same $5M balance, that's $17,500 to $22,500 per year before fund costs. The platform's financial planning tools are more robust than Vanguard's, and the ability to aggregate outside accounts gives a more complete picture of your financial position.

Neither service replaces a fee-only RIA for FATFIRE-level complexity. If you're paying either provider's advisory fee on a $5M+ balance, you should be asking whether a flat-fee or hourly RIA would deliver more value for less cost.

For a broader view of platform alternatives, Personal Capital as an alternative platform offers aggregation and planning tools that complement either provider's 401k administration without the advisory fee on your full balance.

The best Vanguard funds for retirees and the question of ETFs versus mutual funds within a rollover IRA are worth reviewing before you finalize a destination, particularly if you're optimizing for tax-loss harvesting flexibility or dividend timing.

The Practical Decision Framework

Neither Empower nor Vanguard is the right answer in the abstract. The decision depends on your situation.

Choose Vanguard if:

• You're a business owner who wants the lowest-cost plan structure and straightforward plan design
• You're rolling over a large balance and want institutional-grade index funds without advisory fees
• Your primary goal is minimizing total cost of ownership over a 20-plus year horizon
• You believe in passive indexing and don't need access to alternative fund categories

Choose Empower if:

• Your employer already uses Empower and you have no choice (optimize within the plan rather than fighting the structure)
• You're a business owner who needs a highly customized plan document with TPA support
• You want broader fund access including actively managed options across multiple fund families
• You value integrated financial planning tools and account aggregation within a single platform

In either case, the actions that matter most:

• Confirm whether your plan document enables after-tax contributions and in-plan Roth conversions
• Calculate the total cost of ownership in basis points, not just the expense ratio of your primary fund
• Verify your provider's SECURE 2.0 compliance roadmap, particularly the mandatory Roth catch-up provision effective 2026
• Review stable value fund options in 401(k) plans as a cash-equivalent alternative if you're managing duration risk inside the plan

The 401k is one piece of a larger tax optimization structure at this level. The provider matters, but the plan design features you negotiate or elect matter more.

References

• IRS -- "Publication 560: Retirement Plans for Small Business (SEP, SIMPLE, and Qualified Plans)" (2024)
• IRS -- "IRC Section 415: Retirement Topics -- 401(k) and Profit-Sharing Plan Contribution Limits" (2024)
• IRS -- "Retirement Topics: Safe Harbor 401(k) Plans" (2024)
• IRS -- "Notice 2023-75: Guidance on SECURE 2.0 Roth Catch-Up Contribution Requirement" (2023)
• Vanguard -- "How America Saves 2024" (2024)
• Morningstar -- "U.S. Fund Fee Study" (2023)
• Investment Company Institute -- "ICI Research Perspective: The Economics of Providing 401(k) Plans" (2023)
• SECURE 2.0 Act of 2022 -- "Division T of the Consolidated Appropriations Act, 2023 (P.L. 117-328)" (2022)
• Journal of Financial Planning -- "The Tax Efficiency of Mega Backdoor Roth Conversions for High-Income Earners"