15 Federal Tax Capital Gain Calculation

When you sell an asset for more than you paid for it, you realize a capital gain. The federal government taxes these gains at different rates depending on how long you held the asset. The 15% rate applies to long-term capital gains, which are gains from assets held for more than one year.

How the 15% Federal Tax Rate Works

The 15% federal capital gains tax rate applies to long-term capital gains. These are gains from assets held for more than one year, including stocks, bonds, real estate, and other investments. The rate is lower than the ordinary income tax rates, reflecting the government's view that capital gains represent wealth creation rather than earned income.

The 15% rate applies to gains realized after January 1, 2023. For gains realized before that date, the rate may be different depending on your tax bracket.

Key Points About the 15% Rate

Applies only to long-term capital gains (assets held more than one year)
Does not apply to short-term capital gains (assets held one year or less)
Combined with your ordinary income tax rate for the year
Subject to the net investment income tax (NIIT) if you have high net investment income

Calculation Method

The federal capital gains tax is calculated using the following formula:

Capital Gains Tax = (Sale Price - Purchase Price) × 15%

Where:

Sale Price = The amount you received from selling the asset
Purchase Price = The amount you paid to acquire the asset, including any capital gains taxes paid on previous sales of the same asset

Example Calculation

If you bought a stock for $10,000 and sold it for $15,000 after holding it for more than one year, your capital gain would be $5,000. The federal capital gains tax on this gain would be:

$5,000 × 15% = $750

This $750 would be added to your ordinary income and taxed at your applicable income tax rate.

Worked Examples

Example 1: Stock Investment

You bought 100 shares of XYZ stock at $50 per share for $5,000. After holding the stock for 18 months, you sell it for $75 per share.

Description	Amount
Purchase Price	$5,000
Sale Price	$7,500
Capital Gain	$2,500
Federal Capital Gains Tax (15%)	$375

Example 2: Real Estate Sale

You bought a house for $250,000 in 2020 and sell it for $350,000 in 2023 after holding it for 3 years.

Description	Amount
Purchase Price	$250,000
Sale Price	$350,000
Capital Gain	$100,000
Federal Capital Gains Tax (15%)	$15,000

Frequently Asked Questions

What is the difference between short-term and long-term capital gains?

Short-term capital gains are from assets held one year or less, while long-term capital gains are from assets held more than one year. The 15% rate applies only to long-term gains.

How does the 15% rate affect my total tax bill?

The 15% rate applies only to your capital gains. Your total tax bill will also include taxes on your ordinary income at your applicable income tax rate.

Are there any deductions or credits that can reduce my capital gains tax?

Yes, you may be able to deduct certain expenses related to the sale of the asset, such as real estate commissions or capital gains taxes paid on previous sales of the same asset.

What happens if I have high net investment income?

If you have high net investment income, you may be subject to the net investment income tax (NIIT), which applies a 3.8% tax to your net investment income.