What is Capital Gain?

A capital gain is the profit realized from the sale of a capital asset, such as corporate stocks, bonds, mutual funds, real estate, or collectibles, for a price higher than its original purchase price (known as its cost basis). The increase in an asset's market value is classified as an 'unrealized' or 'paper' gain as long as the investor continues to hold the asset. It is only when the asset is sold that the gain becomes 'realized,' which triggers a taxable event under United States tax laws.

To calculate tax liability, the IRS categorizes realized capital gains based on the holding period. Short-term capital gains apply to assets owned for one year or less before sale and are taxed at the investor's standard federal ordinary income tax rates, which range from 10% to 37%. Conversely, long-term capital gains apply to assets held for more than one year and benefit from preferential tax rates of 0%, 15%, or 20%, depending on the investor's overall taxable income. High earners may also be subject to an additional 3.8% <a href="/articles/high-income-fica-additional-medicare-niit-math" class="text-emerald-600 dark:text-emerald-400 hover:text-emerald-700 dark:hover:text-emerald-300 hover:underline font-semibold transition-colors duration-200">Net Investment Income Tax</a> (NIIT) on their investment returns.

Importantly, capital gains can be offset by capital losses (selling assets for less than their cost basis) through a process called tax-loss harvesting. In any given tax year, if capital losses exceed capital gains, investors can use the net loss to offset up to $3,000 of ordinary income ($1,500 if married filing separately), carrying forward any remaining losses to future tax years. This makes strategic capital gains management a critical component of personal investment planning.