Fidelity ZERO vs Vanguard: Fee Impact on Returns

When it comes to long-term investing, fees are one of the most critical factors that determine your overall returns. Even small expense ratios, when compounded over decades, can have a meaningful impact on wealth accumulation. Two of the most widely discussed low-cost investment options today are Fidelity’s ZERO funds and Vanguard’s low-cost index funds. Both offer investors diversified, passive investment opportunities, but with different fee structures and approaches.

This article examines the Fidelity ZERO funds versus Vanguard index funds, focusing on how fees impact long-term returns, what each option offers, and which type of investor may benefit most from each.

What Are Fidelity ZERO Funds?

In 2018, Fidelity launched its suite of "ZERO" index mutual funds with no expense ratio. The aim was to attract cost-conscious investors and compete directly with Vanguard and Schwab in the index fund space. The key Fidelity ZERO funds include:

• Fidelity ZERO Total Market Index Fund (FZROX) – Tracks a broad spectrum of U.S. stocks.
• Fidelity ZERO Large Cap Index Fund (FNILX) – Focuses on large-cap U.S. companies.
• Fidelity ZERO Extended Market Index Fund (FZIPX) – Complements FNILX by focusing on mid- and small-cap companies.
• Fidelity ZERO International Index Fund (FZILX) – Covers international developed and emerging markets.

These funds have no expense ratio at all—0.00%. Fidelity is able to do this because it created proprietary indexes rather than licensing from third parties like MSCI or S&P Dow Jones.

What Are Vanguard Index Funds?

Vanguard pioneered index investing in the 1970s and is still the largest index fund provider in the world. Vanguard funds don’t carry a 0.00% expense ratio like Fidelity ZERO, but their fees are among the lowest in the industry. Some examples include:

• Vanguard Total Stock Market Index Fund (VTSAX / VTI ETF) – Expense ratio: 0.04% (mutual fund) or 0.03% (ETF).
• Vanguard 500 Index Fund (VFIAX / VOO ETF) – Expense ratio: 0.04%.
• Vanguard Total International Stock Index Fund (VTIAX / VXUS ETF) – Expense ratio: 0.11% (mutual fund) or 0.07% (ETF).

While Vanguard charges slightly more than Fidelity ZERO, its expense ratios are still very close to zero when compared to industry averages.

Expense Ratios: The Core Difference

The primary difference between Fidelity ZERO and Vanguard is the expense ratio. Here is a simplified comparison:

How Fees Impact Long-Term Returns

At first glance, 0.04% may seem trivial compared to 0.00%. However, over decades of compounding, even small differences add up. Let’s break it down.

Example: $100,000 Invested Over 30 Years

Assume an average annual return of 7% before fees.

• Fidelity ZERO (0.00% expense ratio)
  • Ending value = $761,225
• Vanguard 0.04% expense ratio
  • Annual net return = 6.96%
  • Ending value = $754,428

Difference: $6,797 (less than 1% difference over 30 years).

Example: $500,000 Invested Over 30 Years

• Fidelity ZERO (0.00%) = $3,806,125
• Vanguard (0.04%) = $3,772,142

Difference: $33,983 over 30 years.

Example: $1,000,000 Invested Over 40 Years

• Fidelity ZERO (0.00%) = $14,974,456
• Vanguard (0.04%) = $14,828,748

Difference: $145,708 over 40 years.

Key Takeaway

The difference between 0.00% and 0.04% grows with higher balances and longer time horizons, but for most investors, it’s still relatively small compared to overall market growth. In many cases, other factors (fund availability, tax efficiency, account type) may matter more than this slight fee difference.

Other Factors to Consider Beyond Fees

1. Tracking Indexes

• Fidelity’s ZERO funds track proprietary indexes rather than standard benchmarks like the S&P 500. For example, FNILX is not technically an S&P 500 fund—it tracks a Fidelity-created large-cap index.
• Vanguard funds typically follow well-established indexes like CRSP or FTSE.
• This means Fidelity ZERO funds may perform slightly differently than their Vanguard counterparts, though usually the difference is minimal.

2. Fund Availability

• Fidelity ZERO funds are only available to investors through Fidelity accounts. They cannot be bought outside of Fidelity.
• Vanguard funds and ETFs can be purchased across multiple brokerages.

3. Minimum Investments

• Fidelity ZERO funds have no minimum investment requirement.
• Vanguard Admiral Shares mutual funds (e.g., VTSAX) often require a $3,000 minimum. However, Vanguard ETFs (like VTI) have no minimum beyond the cost of one share.

4. ETF vs. Mutual Fund Structure

• Fidelity ZERO funds are mutual funds only.
• Vanguard offers both ETFs and mutual funds, giving more flexibility and potential tax efficiency (especially with ETFs in taxable accounts).

5. Company Ownership Structure

• Vanguard is owned by its funds, which means its investors indirectly own Vanguard. This unique structure ensures Vanguard operates at cost, returning profits to investors in the form of lower fees.
• Fidelity is a privately held company, so while its ZERO funds are extremely low cost, its motivation is to attract investors to its broader suite of products and services.

Fee Impact in Different Scenarios

1. Young Investor Starting Small

A 25-year-old investing $200 per month in a Fidelity ZERO fund versus a Vanguard fund:

• After 40 years, Fidelity ZERO investor ends with about $479,250.
• Vanguard 0.04% investor ends with about $474,200.
• Difference: $5,050.

In this case, fees make a slight difference, but the bigger factor is whether the investor stays consistent with contributions.

2. High-Net-Worth Investor

A 45-year-old with $2 million invested for 25 years:

• Fidelity ZERO: ~$10.8 million
• Vanguard 0.04%: ~$10.7 million
• Difference: $100,000+.

Here, the difference is more meaningful due to the higher starting balance.

Which Is Better: Fidelity ZERO or Vanguard?

The answer depends on the investor’s priorities.

Choose Fidelity ZERO if:

• You want the absolute lowest expense ratio possible.
• You’re starting with small amounts (no minimums).
• You’re comfortable keeping your investments within Fidelity’s ecosystem.

Choose Vanguard if:

• You prefer widely recognized benchmarks (e.g., S&P 500, CRSP, FTSE).
• You want ETF options for tax efficiency and flexibility.
• You value Vanguard’s investor-owned structure.
• You want portability—Vanguard ETFs can be held at any brokerage.

Frequently Asked Questions

1. Are Fidelity ZERO funds really free?
Yes, Fidelity ZERO funds charge 0.00% expense ratio. However, they still make money from investors through securities lending, order flow, and cross-selling other services.

2. Will the performance of Fidelity ZERO and Vanguard funds be identical?
Not exactly. Since they track different indexes, small performance differences may occur year to year, though long-term results should be similar.

3. Are there any risks to using Fidelity ZERO funds?
The biggest risk is lack of portability—if you ever leave Fidelity, you may have to sell your funds and realize capital gains, whereas Vanguard ETFs can move between brokerages.

4. Should I prioritize fees over diversification?
No. Fees matter, but asset allocation and diversification are more important for long-term success.

5. Can I mix Fidelity and Vanguard funds?
Yes, many investors use both. For example, Fidelity ZERO for U.S. stocks and Vanguard ETFs for international exposure.

Final Thoughts

The fee difference between Fidelity ZERO and Vanguard index funds is real, but small in most cases. A 0.00% vs. 0.04% expense ratio only translates to a few thousand dollars of difference for most long-term investors, especially when contributions and market growth are the bigger drivers of wealth.

Fidelity ZERO is an excellent option for beginner investors, low-balance accounts, or those who want a simple, cost-free way to invest. Vanguard remains a powerhouse for ETFs, tax-efficient structures, and trusted indexing. In the end, the best choice may not be about fees at all but about which provider aligns better with your long-term strategy, account structure, and investing philosophy.