Quick Answer
Mutual funds must distribute at least 90% of investment-company taxable income and 90% of qualifying tax-exempt interest to shareholders each year to qualify as a regulated investment company (net long-term capital gain is excluded from that test), and that tax burden passes through even on reinvested distributions in a taxable account. A fund's capital gain distributions are always reported to shareholders as long-term, regardless of the investor's own holding period. ETFs generally distribute fewer capital gains than mutual funds because redemptions are typically in-kind, which is not a taxable event.
Beyond fees and liquidity, tax treatment matters. How a fund is structured determines when and how much tax investors owe, even on gains they never chose to realize.
The 90% Distribution Requirement (Subchapter M)
To qualify as a regulated investment company (RIC) under Subchapter M of the Internal Revenue Code, a mutual fund must distribute at least 90% of its investment-company taxable income AND 90% of its qualifying tax-exempt interest to shareholders annually.
- Net long-term capital gain is not part of the 90% qualification calculation. The distribution test is built around ordinary income and tax-exempt interest, not capital gains
- This pass-through structure generally prevents double taxation when the fund distributes its income; income or gains the fund retains can still be taxed at the fund level
- The tax burden on distributions passes directly to shareholders
- Most funds still distribute close to 100% of both income and realized capital gains to avoid any fund-level tax
Capital Gains Distributions
When a fund manager sells securities within the portfolio at a profit, those gains are distributed to shareholders:
- Taxable in a taxable account even if reinvested: choosing to reinvest distributions does not defer the tax
- Always reported as long-term: a fund's capital gain distributions are always treated as long-term capital gains to the shareholder, no matter how long the fund held the underlying securities or how long the investor has held fund shares
- Any net short-term gains at the fund level are generally passed through to shareholders as ordinary dividends, not as a separate short-term capital gain distribution
Exam Tip: Gotchas
- Capital gain distributions are always long-term, regardless of the investor's holding period. An investor who bought fund shares yesterday can still receive a long-term capital gains distribution.
- Reinvesting distributions does not defer taxes in a taxable account. The distribution is taxable in the year received regardless of whether the investor takes cash or reinvests. (Tax-advantaged accounts like IRAs defer this differently.)
Dividend Distributions
- Ordinary dividends: taxed at the investor's regular income tax rate
- Qualified dividends: taxed at the lower long-term capital gains rate
- Whether dividends are ordinary or qualified depends on the fund's underlying holdings (e.g., dividends from U.S. corporations held for the required period qualify for the lower rate), and the shareholder must also meet an applicable holding-period requirement for their fund shares
ETF Tax Efficiency
ETFs are generally more tax-efficient than mutual funds due to the in-kind creation and redemption mechanism:
- When ETF investors sell shares, they sell on an exchange to another investor. The ETF manager does not need to sell underlying securities
- When authorized participants redeem creation units, the ETF delivers baskets of underlying securities in kind rather than selling them for cash
- In-kind transfers are not taxable events for the fund, so fewer capital gains are realized and distributed
Exam Tip: Gotchas
- ETFs are more tax-efficient, but not tax-free. They still distribute dividends and any realized capital gains. The advantage is fewer forced capital gains distributions, not zero distributions.
Phantom Gains (Embedded Tax Liability)
- When a fund holds securities with large unrealized gains, new investors who buy into the fund inherit that embedded tax liability
- If the fund later sells those appreciated securities, the resulting capital gains distribution is taxable to all current shareholders, including those who bought after the gains accrued
- This "phantom gain" effect means an investor can owe taxes on gains they never personally benefited from
Example: A fund bought a stock at $20 that is now worth $50. A new investor buys fund shares today. If the fund sells that stock tomorrow, the $30 gain per share is distributed to all shareholders, including the new investor who just bought in at $50.
Tax Comparison: Mutual Funds vs. ETFs
| Feature | Mutual Funds | ETFs |
|---|---|---|
| Capital gains distributions | Common (manager sells securities for cash redemptions) | Rare (in-kind redemption avoids triggering gains) |
| Phantom gain risk | Higher (embedded gains distributed to all holders) | Lower (in-kind mechanism purges low-basis shares) |
| Dividend tax treatment | Same (depends on underlying holdings) | Same (depends on underlying holdings) |
| Subchapter M applies? | Yes (must distribute 90%+) | Yes (must distribute 90%+) |
What Should You Check on Exam Day?
- RICs must distribute at least 90% of investment-company taxable income and 90% of qualifying tax-exempt interest annually to qualify under Subchapter M; net long-term capital gain is not part of that 90% test
- Capital gains distributions are taxable in a taxable account even when reinvested, and are always reported as long-term, regardless of the investor's own holding period
- Dividends are ordinary or qualified depending on the fund's underlying holdings and the shareholder meeting the applicable holding-period requirement
- ETFs generally distribute fewer capital gains than mutual funds because redemptions are typically in-kind
- Phantom gains: a new investor can owe tax on gains that accrued before they bought in