What it means
Imagine you bought something valuable, like a piece of art or shares in a company. If its value increases over time and you decide to sell it, the extra money you receive compared with what you originally paid is your capital gain.
It is essentially the bonus you earn from an investment appreciating in value. A gain is called realised only when you sell.
Until then it is an unrealised gain, sometimes called a paper gain. If shares you bought for $5,000 are now worth $20,000 but you still hold them, you have an unrealised gain of $15,000 and, in most systems, no tax to pay yet.
The size of the gain is not simply the sale price minus the purchase price. Costs of buying and selling, such as broker fees or legal costs, and money spent improving the asset, such as extending a building, are usually included in the calculation.
If you sell for less than your total cost, the result is a capital loss, which in many places can be set against gains elsewhere. Capital gains are important because they can significantly impact your wealth, and they are usually taxed differently from ordinary income.
Many tax systems apply different rates to gains, offer allowances or reliefs, or tax long-held assets differently from those sold quickly. The rules and rates are set by the tax authority and change from time to time, so check them for your own country before deciding when to sell.
For businesses, gains on selling property, equipment or investments are normally reported separately from day-to-day trading profit because they are one-off in nature. Non-finance managers should avoid treating a one-off gain as a recurring source of income when judging performance or planning budgets.
Think of capital gain like buying a vintage car for a low price, fixing it up, and then selling it for a higher price. The extra cash you receive after covering the repair and selling costs is your capital gain.
In practice
Real-world examples
Example 1
An entrepreneur buys shares in a tech startup for $5,000. A few years later, the startup goes public, and the shares are now worth $20,000. If the entrepreneur sells the shares, their capital gain before costs would be $15,000. If they hold on instead, the gain stays unrealised and can still rise or fall.
Example 2
A small manufacturing company purchases a piece of machinery for $10,000. After several years, the company decides to sell the machinery because it upgraded to a newer model. It sells the old machinery for $12,000, resulting in a capital gain of $2,000. The gain is reported separately from the company's trading profit.
Example 3
A family-run retail business buys its shop premises for $250,000 and later sells them for $340,000 after spending $30,000 on a new roof and shopfront. The gain is $340,000 - $250,000 - $30,000 = $60,000, not $90,000, because the improvement cost is deducted. The owners use the net proceeds to fund a second shop.
Think of it
Think of capital gain like buying a vintage car for a low price, fixing it up, and then selling it for a higher price. The extra cash you get after selling is like your capital gain.
Formula
Calculation
Capital Gain = Selling Price - (Purchase Price + Purchase Costs + Improvement Costs + Selling Costs)
Percentage Gain = Capital Gain / Total Cost x 100
Worked example. An investor buys shares for $5,000 and pays a $50 broker fee. Years later she sells them for $20,000 and pays a $100 selling fee.
- Total cost = $5,000 + $50 = $5,050
- Net proceeds = $20,000 - $100 = $19,900
- Capital gain = $19,900 - $5,050 = $14,850
- Percentage gain = $14,850 / $5,050 x 100 = about 294%
- If the gain is taxed at an illustrative rate of 20%, the tax is $14,850 x 20% = $2,970, leaving $11,880 after taxCase study
Seen in the real world
This is a fictional, illustrative scenario. Harbour Lane Furniture, an invented family business, bought a warehouse for $400,000 and spent $60,000 on loading bays and insulation over the following years. When the town centre was redeveloped, a property investor offered $700,000 for the site. The owners agreed to sell and paid $20,000 in agent and legal fees. The finance manager calculated the gain: $700,000 less $400,000 purchase cost, $60,000 of improvements and $20,000 of selling costs gives a capital gain of $220,000.
At an illustrative tax rate of 20%, the tax would be $44,000, leaving $176,000 of gain after tax. The business received $680,000 in cash after selling costs, but only part of that was profit, because $460,000 simply returned the money originally invested. The owners were tempted to treat the $220,000 as a sign that the business was suddenly far more profitable. The finance manager reminded them that the sale was a one-off, and that the trading profit from furniture sales was unchanged. They used the cash to rent a smaller unit and pay down debt, and kept the gain out of the budget used to judge the performance of the sales team.
Watch out
Common mistakes
- Treating the whole sale price as profit and forgetting to deduct the original cost, improvement costs and selling costs.
- Assuming a rise in the value of an asset you still hold is already a taxable gain or money in your pocket, when it remains unrealised until you sell.
- Ignoring tax when deciding when to sell, or treating a one-off gain as if it will repeat every year.
Questions
People also ask
Is capital gain the same as income?
No. Income such as salary, interest or trading profit is earned regularly, whereas a capital gain arises when an asset is sold, and tax systems often treat the two differently.
Can a capital loss reduce a capital gain?
In many countries, yes. A loss on one asset can usually be set against gains on others, subject to local rules, so keep clear records of what you paid and what you received.
Do companies pay tax on capital gains?
Generally a company's gains are included in its taxable profit, sometimes with special reliefs, but the rules depend on the country, so ask a qualified tax adviser before selling a major asset.