Index Fund Fees Through Time

Quick definition: The dramatic decline in index fund fees from 0.83% in 1976 to 0.03% today, driven by increasing scale, competition, and the structural realization that passive funds can operate at near-zero marginal cost.

Key Takeaways

• The first index fund charged 0.83% annually—expensive by today's standards but revolutionary for its time because index investing seemed both unnecessary and impossible at that price
• Fees fell from 0.83% (1976) to 0.20% (1990s) to 0.05% (2010s) to 0.03% today, reflecting scale economies and competitive pressure
• The fee compression created by low-cost index fund pioneers like Vanguard forced the entire industry to rethink its business model
• As fees have fallen, index funds have become an increasingly dominant share of managed assets, eventually becoming the default option for most investors
• The fee trajectory over 50 years suggests continued downward pressure, with zero-fee or negative-fee funds becoming increasingly common

The Original Index Fund's Expensive Innovation

When Jack Bogle launched the First Index Investment Fund in 1976, it carried an expense ratio of 0.83% per year. This was the cost of operating the fund, paying staff, maintaining systems, and providing investor communication. In the context of 1976, 0.83% seemed high but defensible. The fund had to build infrastructure from scratch, hire researchers to maintain the index methodology, and convince skeptical investors to buy a product everyone said was guaranteed mediocrity.

To put this in perspective, the average active mutual fund charged about 0.60% back then. Bogle's index fund at 0.83% was actually more expensive than the average active fund—a detail that critics gleefully pointed out. How could an index fund be worth more than an active fund?

But this comparison missed the fundamental point. The 0.83% fee for the index fund was the total cost to the investor. For active funds, the stated expense ratio was only part of the story. Active funds also had higher trading costs, wider bid-ask spreads on their transactions, and often distributed capital gains that forced investors to pay taxes.

Still, Bogle knew the 0.83% was unsustainably high. The fund's strategy didn't require expensive human stock-pickers. The entire premise was that you could mechanically replicate the index at minimal cost. As the fund grew, Bogle was committed to passing those gains to investors through lower fees.

The Declining Fee Trajectory

By the 1980s, the First Index Fund's fee had fallen to around 0.20%, still higher than modern fees but reflecting the reality that the fund was now large enough to spread fixed costs across a broad base. By the 1990s, as index investing gained acceptance and competitors entered the space, fees continued falling. By 2000, you could find index funds charging 0.10-0.15%.

The real acceleration came in the 2000s and 2010s. As indexing became mainstream and ETFs created new competition, Vanguard slashed fees again and again. The fund that Bogle had launched at 0.83% was now available at 0.05%. Competitors matched these cuts or went even lower. The S&P 500 index fund became a commodity product with fees approaching zero.

By 2020, the standard expense ratio for an S&P 500 index fund was 0.03% at Vanguard, Fidelity, or Schwab. At some providers, you could find it for 0.02%. These aren't just lower fees—they represent a 95% reduction from the 0.83% level of 1976.

To understand the magnitude of this change, consider the compounding effect. An investor who held the original 0.83% fund for 50 years would accumulate a very different ending balance than an investor in a 0.03% fund, all else equal.

Starting with $100,000 at a 7% pre-tax return over 50 years:

• At 0.83% fees: $2,850,000
• At 0.03% fees: $3,680,000

The difference is $830,000. That's the value of fee compression in concrete terms.

Why Fees Could Fall So Dramatically

The reason index fund fees could fall so dramatically while the funds remained profitable businesses is that the marginal cost of managing an index fund is approaching zero. Once you've built the infrastructure to track an index, adding another billion dollars of assets costs almost nothing. You don't need more analysts—you don't have any. You don't need better stock-pickers—the index is the stock-picker. You just need more servers to handle more data.

Active funds can't achieve this because they need expensive talent—portfolio managers, analysts, traders. Every time an active fund grows, it faces the risk that the added assets will outpace the ability of the existing team to manage them effectively. So active fund fees tend to decline slowly as funds grow, but they can't fall too far without making the business uneconomical for the talent.

Index funds face no such constraint. The business model is essentially software: build it once, distribute it infinitely. The cost structure favors extreme scale. This is why Vanguard, which is the largest player in index investing, can charge the lowest fees. The firm has spread its fixed costs across the most assets, allowing it to cut prices to capture even more market share.

Competition Driving the Decline

The fee compression wasn't inevitable. It resulted from specific competitive choices. When Bogle and Vanguard pioneered low-cost index investing, competitors initially responded by dismissing index funds as inferior. But as the evidence mounted that index funds outperformed active funds on an after-cost basis, competitors faced a choice: match Vanguard's fees or risk losing assets.

Fidelity, one of the largest fund companies, initially resisted the shift to index funds. But as investors increasingly preferred Vanguard's low-cost options, Fidelity was forced to respond. It eventually launched its own index funds, and like Vanguard, it aggressively cut fees to compete.

Schwab and other discount brokers pushed the trend further. These firms had no legacy investment management business—they started as brokers and simply offered the cheapest index funds available. The competitive pressure from these new entrants accelerated the industry-wide shift toward zero-cost investing.

Each round of fee cuts expanded the market. As fees fell from 0.50% to 0.20%, a wider audience concluded that indexing made sense. As fees fell from 0.10% to 0.03%, index funds became the obvious choice for any investor without a compelling reason to pay for active management. The fee compression created a virtuous cycle: lower fees attracted more assets, which allowed firms to cut fees further.

The Shift in Market Share

The fee compression and increased competition transformed the mutual fund industry. In 1990, active funds dominated; passive index funds represented a tiny fraction of managed assets. By 2020, index funds represented nearly 50% of the U.S. equity fund market. Today, that percentage is likely higher.

This shift represents a fundamental change in how Americans invest. The margin of victory for index funds over active management has grown so large—largely due to the fee advantage—that the question has shifted from "Should you index?" to "Why wouldn't you?"

The industry has responded with a new strategy: creating more complex index variants (smart beta, factor funds, themed funds) that charge higher fees while still claiming to be "passive." But the core S&P 500 and broad market index funds have become commodity products trading on price alone.

The Zero-Fee Future

As of the mid-2020s, some brokers have begun offering zero-fee index funds. These funds operate at a loss on a per-share basis but generate profits through other revenue streams—trading commissions, lending out shares, providing research, or cross-selling other services.

This suggests the endpoint of fee compression: the marginal cost of operating an index fund has fallen so close to zero that firms are willing to run index funds as a loss leader. The index fund is the free traffic driver that brings customers in the door, who then buy other products or services.

For investors, this represents the ultimate victory. If you can invest in a diversified portfolio of index funds with zero fees, the returns you achieve will be virtually identical to the returns of the market itself. Your only cost will be the bid-ask spread when you buy or sell, which is typically a fraction of a basis point on large trades.

The fee compression over 50 years—from 0.83% to 0.00%—might be the single most investor-friendly development in financial markets. It's hard to overstate the impact on long-term wealth accumulation.

Process

Next

In the next article, we explore the phenomenon of zero-fee index funds—how they're possible, what the catch might be, and whether they represent genuine investor benefit or merely a business model shift.