How do long-term and short-term capital gains differ in tax treatment?

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AcadiFi · Accepted Answer

Long-term capital gains (LTCG) apply to investments held more than one year and receive preferential tax rates of 0%, 15%, or 20% depending on taxable income...

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Exact rules: the holding period begins the day AFTER acquisition and includes the sale date. One day short of 366 days total holding triggers STCG treatment. For inherited assets, holding period is always long-term regardless of decedent's holding. For gifts, the donor's holding period carries over to the recipient.

Tax rate comparison for a high-bracket investor: STCG at 37% + 3.8% NIIT = 40.8%; LTCG at 20% + 3.8% NIIT = 23.8%. On a $100,000 gain, STCG generates $40,800 tax versus LTCG $23,800 — difference of $17,000.

Worked scenario: Daniela Moreno, a tech executive in the 37% bracket, holds 5,000 shares purchased at $40 now worth $85. Selling at day 360 produces $225,000 STCG × 40.8% = $91,800 tax. Waiting 7 more days to day 367 converts to LTCG: $225,000 × 23.8% = $53,550 tax. Waiting the week saves $38,250 — an effective annualized return of thousands of percent for the delay.

```mermaid
flowchart LR
  A[Sale Date] --> B{Holding Period}
  B -->|<= 1 year| C[STCG Ordinary]
  B -->|> 1 year| D[LTCG Preferred]
  C --> E[Higher Tax]
  D --> F[Lower Tax]
```

Netting rules: within each category, gains and losses net first — STCG losses offset STCG gains, LTCG losses offset LTCG gains. Net losses in one category then offset the other category. Final net loss up to $3,000 deductible against ordinary income, remainder carries forward indefinitely.

Strategic implications: (1) avoid selling positions near the one-year anniversary without tax consideration; (2) harvest short-term losses first to offset high-tax STCG; (3) defer sales into long-term status when possible; (4) coordinate with estate planning — held-until-death positions receive step-up in basis eliminating the gain entirely. For CFA Level III, always identify holding period in case scenarios before computing after-tax wealth.

How do long-term and short-term capital gains differ in tax treatment?

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