Should I Choose Active or Passive ETFs?
Exchange-traded funds now come in two broad flavors: passive ETFs, which track an index, and actively managed ETFs, where a manager or management team selects holdings with the goal of outperforming a benchmark. Both generally use the ETF wrapper and trade on an exchange throughout the day, though the specific creation and redemption mechanics can vary by fund, and the similarities largely end there.
This is not a question with a single correct answer for every investor. The right mix depends on cost sensitivity, the account the ETF will be held in, tolerance for a manager's judgment driving outcomes, and how the rest of a portfolio is already positioned. This article walks through how each approach works, where the cost and tax differences come from, and where each may fit into a broader plan.
What Is a Passive ETF?
A passive ETF is built to replicate the holdings and weighting of a specific index, such as a broad U.S. stock market index, a bond index, or a narrower index focused on a sector or factor. The fund does not attempt to beat the index; it aims to match it as closely as possible, net of a small amount of tracking difference.
Key characteristics:
- Holdings and weightings are determined by the underlying index's published methodology, not a manager's discretion
- Expense ratios are typically lower, since a rules-based strategy generally requires less ongoing security research and portfolio decision-making
- Portfolio turnover is generally low, occurring mainly when the index itself is reconstituted or rebalanced
- Performance is designed to track the index closely, with the difference between fund return and index return known as tracking difference
Why this matters: Because a passive ETF's mandate is defined by a rules-based index rather than a manager's judgment, the fund's behavior tends to be transparent and rules-based. An investor generally has greater visibility into the fund's holdings and the rules governing how those holdings are selected and weighted, which is not always true of an actively managed strategy.
What Is an Active ETF?
An actively managed ETF is run by a portfolio manager or team that selects individual securities, sector weightings, or fixed income positions with the intent of outperforming a stated benchmark, reducing volatility relative to that benchmark, or pursuing some other specific mandate beyond simple index replication.
Key characteristics:
- Holdings reflect a manager's research and judgment, which can shift over time as market views change
- Expense ratios are typically higher than a comparable passive ETF, reflecting the cost of active research and management
- Portfolio turnover is often higher, since the manager may buy and sell positions in response to changing views
- Performance can differ meaningfully from a benchmark in either direction, unlike a passive fund designed to track it closely
Why this matters: An active ETF relies, implicitly or explicitly, on the expectation that a manager's process can add value relative to its benchmark or stated objective after accounting for its costs. That expectation may be realized for a given fund over a given period, but it is not guaranteed, and the dispersion of outcomes across active managers tends to be far wider than the dispersion across passive funds tracking the same index.
How Do Costs Compare Between Active and Passive ETFs?
Expense ratios are the most visible cost difference, and they compound over long holding periods in a way that is easy to underweight in the short term. A passive ETF's typically lower cost reflects that a rules-based strategy generally requires less ongoing security research and portfolio decision-making, though fund scale, distribution arrangements, securities lending revenue, index licensing fees, and administrative costs also influence where a specific fund's expense ratio lands. An active ETF's higher cost reflects the research, trading, and management required to pursue outperformance.
Cost is not limited to the stated expense ratio. Actively managed strategies with higher turnover may also incur more trading costs inside the fund, including bid-ask spreads and market impact, which are not captured in the expense ratio but still reduce net returns to shareholders. Passive ETFs tracking highly liquid indexes often have lower internal trading costs, although the actual costs depend on turnover, liquidity, trading activity, and implementation.
How Does Tax Efficiency Compare Between Active and Passive ETFs?
This is one of the more commonly overlooked differences, and it can matter as much as the expense ratio for an ETF held in a taxable account.
Two separate tax events are involved, and it helps to keep them distinct. ETF tax efficiency primarily concerns the timing and frequency of taxable distributions from the fund itself; it does not eliminate capital gains taxes when an investor sells ETF shares at a gain. The discussion that follows addresses the first issue, the fund's own distributions, since that is where the active/passive and structural differences described below come into play.
The in-kind mechanism helps both types of ETFs. Most ETFs, active and passive alike, use an in-kind creation and redemption process with authorized participants. When shares are redeemed, the fund can deliver appreciated securities directly rather than selling them for cash, which generally avoids realizing a capital gain at the fund level. This structural feature is a meaningful reason ETFs, as a wrapper, tend to be more tax-efficient than comparably managed mutual funds.
The underlying strategy, not the active or passive label, is the more relevant variable. The in-kind mechanism can reduce the tax impact of investor flows into and out of the fund, including by using redemptions as an opportunity to remove low-basis securities from the portfolio, but it does not eliminate taxes generated by the underlying strategy itself. An actively managed ETF that frequently trades appreciated securities may still realize capital gains, particularly when a transaction cannot be efficiently handled through an in-kind exchange, such as certain derivatives, securities that are difficult to transfer in-kind, or other positions that cannot be efficiently handled through the mechanism. Because broad index strategies typically have lower turnover than actively managed strategies, passive ETFs often carry an additional tax-efficiency edge on average, but that is a tendency, not a rule: Morningstar's research on this question has found that actively managed ETFs have historically been far more tax-efficient than actively managed mutual funds, and have not consistently produced larger capital gains distributions than passive ETFs within the same category. The degree of tax efficiency for a given ETF therefore depends on both the ETF structure and the underlying strategy's holdings and trading activity, and Morningstar's research is careful to note that an active ETF's tax efficiency is not guaranteed rather than treating active management as inherently tax-inefficient.
Source: Morningstar: "Are Active ETFs Truly More Tax-Efficient?"
California treatment adds another layer. At the federal level, net long-term capital gains generally receive preferential tax rates, while net short-term capital gains are generally taxed at ordinary income rates. California does not provide a preferential capital gains rate; both short-term and long-term capital gains are taxed as ordinary income, with individual income tax rates reaching the state's top marginal rate. For a California taxpayer holding a higher-turnover ETF, active or passive, in a taxable account, this state-level treatment can make the tax drag from capital gains distributions more significant than the federal treatment alone would suggest. For a broader framework on placing different types of holdings across account types, see the related discussion in the tax-efficient asset location post.
Tax efficiency is not determined by the active or passive label alone. The ETF structure can help both types of funds limit capital gains distributions, while the underlying strategy, portfolio turnover, the specific securities held, and how creations and redemptions are implemented also matter. Some actively managed ETFs have historically been highly tax-efficient, while others may generate meaningful taxable distributions depending on how their strategy is run. Evaluating a specific fund's own history of distributions is a more reliable guide than assuming its outcome from the active or passive label alone.
Does Active Management Ever Outperform the Index?
Research on active funds more broadly provides useful context, although the evidence is not limited to ETFs. Individual active managers do outperform their benchmark in any given period, and some sustain outperformance over multiple years. The broader historical pattern, however, has generally been less favorable to active management as a category. Long-term studies have generally found that a majority of actively managed funds underperform relevant benchmarks or passive peers after fund expenses, although results vary substantially by asset class and measurement period. S&P Dow Jones Indices' SPIVA U.S. Year-End 2025 scorecard found that approximately 79% of actively managed large-cap U.S. equity funds underperformed the S&P 500 during 2025, and Morningstar's 2025 Active/Passive Barometer found that only about 21% of active funds survived and outperformed their average indexed peer over the 10 years through 2025. These two reports use different methodologies (SPIVA compares funds to a fixed benchmark index over a defined period, while Morningstar compares surviving active funds to their average passive peer over a rolling window and separately accounts for fund closures), so the specific percentages are not directly comparable, but both point in the same general direction for the periods measured. The specific managers who outperform in one period are not reliably the same managers who outperform in the next.
Sources: S&P Dow Jones Indices: SPIVA U.S. Scorecard, Year-End 2025 | Morningstar: US Active/Passive Barometer Report, Year-End 2025
Active ETFs are a comparatively newer and rapidly growing segment of the ETF universe, and Morningstar has noted that the active-versus-passive distinction has become increasingly nuanced as more active strategies adopt the ETF wrapper. The longer-run statistics above, drawn largely from active mutual funds, are useful context but are not a direct measurement of active ETF outcomes specifically.
Why this pattern tends to persist: In aggregate, active management is a zero-sum game relative to passive market exposure before costs: the aggregate return earned by investors as a group must equal the market return, so the aggregate active-investor dollar cannot outperform the market before costs, and some active investors must outperform the benchmark while others underperform it by a corresponding amount. Fund expenses, trading costs, and taxes then create an additional hurdle for active strategies, which helps explain why the odds tend to favor a passive approach over long holding periods, even though specific managers and specific years can look different.
Some segments have historically been more hospitable to active management, though not reliably so: Efficiency varies by asset class and market segment. Some less efficient or less easily indexed market segments have historically provided better opportunities for certain active managers, although results vary considerably by category and manager. Morningstar's Active/Passive Barometer research has found that certain bond categories and real estate categories have historically shown higher active-manager success rates than broad, highly liquid, well-covered markets such as large-cap U.S. equities, which tend to be the hardest environment for active managers to consistently beat. This pattern reflects historical data for the specific categories and periods measured, not a guarantee that a given active manager in those segments will add value going forward.
Source: Morningstar: US Active/Passive Barometer Report, Year-End 2025
How Do Active and Passive ETFs Compare at a Glance?
| Feature | Passive ETFs | Active ETFs |
|---|---|---|
| Holdings determined by | Index methodology | Manager judgment |
| Typical expense ratio | Lower | Higher |
| Typical portfolio turnover | Lower | Higher |
| Tax efficiency | Often has an added edge from typically lower turnover, though not guaranteed | Can also be highly tax-efficient via the ETF structure; depends on strategy and turnover rather than the active label alone |
| Return relative to benchmark | Designed to track closely | Can diverge meaningfully, in either direction |
| May be particularly useful for | Broad market exposure where low cost and benchmark tracking are priorities | Targeted strategies or market segments where an active mandate may provide a useful role |
(as of the original publication date)
When Might Active ETFs Make Sense?
Passive ETFs may be considered when:
- The exposure needed is a broad, liquid, well-covered market segment where active managers have historically struggled to add consistent value net of fund expenses
- Minimizing cost and the typical tax drag that comes with higher turnover is a priority inside a taxable account
- Simplicity and predictability of holdings and behavior are valued over the potential, but uncertain, benefit of manager judgment
Active ETFs may be considered when:
- The exposure targets a less efficient or less liquid market segment where skilled management has a stronger historical case for adding value
- A specific risk-management objective is desired, such as an active strategy designed to seek lower downside exposure relative to a benchmark, that a rules-based index does not provide by design
- The position plays a targeted, satellite role within a broader portfolio rather than serving as the core, low-cost building block
A blended approach is common. Many portfolios do not treat this as an either/or decision. A structure that uses passive ETFs for broad core exposure and reserves actively managed ETFs for specific, targeted roles can address cost efficiency and specialized objectives at the same time. Determining an appropriate mix generally requires considering the investor's tax situation, account structure, existing holdings, and overall asset allocation.
Common Mistakes When Choosing Between Active and Passive ETFs
Mistake 1: Comparing expense ratios in isolation. Risk: Selecting the lowest-cost option without considering turnover, tax efficiency, and the specific market segment involved. Approach: Weigh cost alongside tax impact and the historical efficiency of the specific asset class before deciding.
Mistake 2: Assuming an active ETF's manager will replicate past performance. Risk: Chasing a fund's historical outperformance without recognizing that manager performance rankings tend to shift meaningfully from one period to the next. Approach: Treat past performance as one data point among several rather than a predictor of future results.
Mistake 3: Ignoring the tax consequences of a high-turnover strategy in a taxable account. Risk: Underestimating the potential after-tax impact of capital gains distributions, particularly for California taxpayers, since California taxes all capital gains as ordinary income rather than applying a preferential rate. Approach: Check the specific fund's turnover and historical capital gains distributions, and evaluate account placement for higher-turnover holdings as part of an overall asset-location strategy, favoring tax-deferred or tax-advantaged accounts where feasible.
Mistake 4: Treating the decision as all-or-nothing. Risk: Assuming a portfolio must be entirely passive or entirely active, rather than considering where each approach fits best. Approach: Consider whether each approach has a role that is consistent with the investor's objectives, costs, tax situation, and overall portfolio.
Deeper Dives: Related Topics
For related strategies on fund selection and tax-efficient portfolio construction, explore:
→ Related strategyEquity Tax Drag Explained → → Related strategyTax-Efficient Asset Location → → Related readS&P 500 Average Return: Why Most Years Don't Match →The Bottom Line
Passive ETFs and active ETFs are both legitimate tools, but they are built to solve different problems. Passive ETFs offer low-cost, predictable exposure to a defined index, and often carry an added tax-efficiency edge from typically lower turnover. Active ETFs offer the possibility of outperformance or a specific risk-management mandate, at the cost of typically higher fees and outcomes that depend on a manager's ongoing judgment, though the ETF structure itself can still make a given active ETF highly tax-efficient depending on its strategy and turnover.
Neither is a default correct choice for every allocation. The appropriate mix depends on the market segment involved, the account the position will be held in, existing holdings elsewhere in the portfolio, and an investor's tolerance for outcomes that can diverge from a benchmark, and those variables interact in ways that are easy to underweight when looking at either approach in isolation.