12 — Capital Gain Distributions Updated for tax year 2025

What this line means

Capital gain distributions paid to you by mutual funds and REITs during the year. These are reported on your 1099-DIV in Box 2a. Even if you reinvested the distributions (bought more fund shares instead of taking cash), they are taxable. Capital gain distributions are always treated as long-term, regardless of how long you owned the fund shares.

Does this apply to you?

• You own mutual funds that distributed capital gains during the year
• You own shares in a real estate investment trust (REIT) that paid capital gain distributions
• You received a 1099-DIV with an amount in Box 2a

Easy to overlook

Capital gain distributions from tax-loss harvested funds still happen Even index funds and “tax-efficient” funds occasionally distribute capital gains when the fund sells holdings. A fund manager rebalancing or handling redemptions can trigger distributions you did not expect. Check your 1099-DIV every year even for funds you consider low-turnover. ¹ [SOURCE: IRS Schedule D instructions — Line 12]

Reinvested distributions are still taxable Many filers assume that because they reinvested the distribution (it bought more shares), it is not taxable. It is. The reinvestment increases your cost basis in the fund, which reduces your gain when you eventually sell, but the distribution itself is taxable in the year it is paid. ² [SOURCE: CP2000 pattern — unreported mutual fund capital gain distributions]

Watch out for this

Omitting capital gain distributions because the filer reinvested them and never received cash. Your 1099-DIV reports the distribution regardless of whether you took cash or reinvested. The IRS receives a copy. Unreported capital gain distributions are one of the most common triggers for CP2000 notices from mutual fund and REIT holdings.

Related lines on your return

• Line 3a — Form 1040 — Qualified dividends (different from capital gain distributions; reported separately)
• Line 15 — Schedule D — Net long-term capital gain or loss
• Line 8a — Schedule D — Long-term gains from selling fund shares (distinct from distributions received while holding)