When you sell an asset that has increased in value over time, you get capital gains income. Real estate and stocks are the most common, but there are many others. The taxes paid on this type of income are significantly lower than those paid on most other types of income. This is distinct from profit income in that you are not purchasing or creating a product with the intention of selling it for a profit.
A capital gain may be short-term (one year or less) or long-term (more than one year) and must be claimed on income taxes.

Passive Income:
Passive income is money that you earn without having to do a lot of “active” work to keep it coming in. In essence, you can earn money by doing the majority of the work up front and putting in some extra effort along the way. For example, suppose you bought a house for Rs 10,00,000 and it costs Rs 11,50,000 after 5 years. You will make a capital gain of Rs 1,50,000 if you sell the house.
Classification of Capital Gain:
There are two type of Capital Gain: –

- Realized Gain: A realized gain occurs when an asset is sold for a higher price than it was purchased for, increasing the current assets. A trade is entered into when a stock is purchased, and a new trade is started when a stock is sold.

- Unrealized Gain: An unrealized gain is a potential profit that exists on paper, resulting from an investment. It is an increase in the value of an asset that has yet to be sold for cash, such as a stock position that has increased in value but still remains open.
How hard is it to get started?
The process to get started is similar to Dividend income. The most challenging aspect of capital gain is getting started. The investor must either carefully select the company he wishes to invest in or any other asset he wishes to invest in. Investors will earn a lot of money if this process is done correctly.
How hard is it to earn the first Rs 1000 from it?
How long it takes you to earn your first Rs 1000 depends on the asset you invest in. After selling the asset, the person will receive a monetary profit. As previously stated, there are two types of gains: realized and unrealized gains. For instance, suppose you paid Rs 1,50,000 for an antique watch, and after a year, someone offered you Rs 1,80,000 for it. So, after a year, you have a Rs 30,000 unrealized capital gain. So, for every 15 days, you are earning Rs 1000.
How hard is it to maintain?
Because the capital gain is dependent on the company’s financial health, the investor is not responsible for maintenance. Assets may be sold in the event of a loss. Purchasing certain assets provides the company with two sources of income: capital gains and dividends/rent. As a result, getting off to a good start is critical; otherwise, you risk losing money.
Success Story:

Warren Buffett is a prime example of someone who became a billionaire through capital gains. He is an American investor, business tycoon, philanthropist, and chairman and CEO of Berkshire Hathaway. Considered one of the most successful investors in the world. A net worth of over $100.6 billion as of April 2021, making him the world’s seventh-wealthiest person. Buffett invests in the company and has earned most of the income after selling the assets.