A Realized Gain or Loss is the actual profit or loss you lock in when you sell an investment. Think of it as the moment your paper profits (or losses) turn into cold, hard cash in (or out of) your pocket. Until you sell, any change in your investment's value is just an unrealized gain/loss—a theoretical number fluctuating with the market's whims. It’s like admiring a valuable painting you own; its value is just an estimate until the moment the auction hammer falls and you complete the sale. The realized gain or loss is calculated by subtracting your original purchase price, or cost basis, from the final selling price. This figure is critically important for two reasons: it's the true measure of your investment's performance, and it's the number your friendly neighborhood tax authority is very interested in. For a value investor, understanding when and why to realize a gain or loss is a cornerstone of disciplined, long-term wealth building.
Calculating your realized gain or loss is refreshingly simple. The formula is: Sale Proceeds - Cost Basis = Realized Gain or Loss Your Cost Basis isn't just the price you paid for the shares; it includes any transaction fees or commissions you paid to buy the investment. Likewise, your Sale Proceeds are what you receive after deducting any fees for selling.
Let's say you buy 100 shares of “Solid Foundations Inc.” at $50 per share and pay a $10 commission.
A year and a half later, you sell all 100 shares at $75 per share, paying another $10 commission.
You have “realized” a $2,480 profit. This is now your money, ready to be reinvested or spent.
Imagine instead that “Solid Foundations Inc.” stumbled. You decide to cut your losses and sell your 100 shares at $40, paying a $10 commission.
While painful, realizing this loss frees up $3,990 in capital to be deployed in a more promising investment.
Beyond simple accounting, the act of “realizing” is a moment of truth for an investor, involving strategy, taxes, and psychology.
This is the most immediate consequence of realizing a gain. Once you sell for a profit, you create a taxable event. Governments are keen to take a slice of your investment success through a capital gains tax. The amount of tax you pay often depends on how long you held the investment. In the United States and many European countries, gains are typically split into two categories:
Realized losses can also be useful. They can often be used to offset realized gains, reducing your overall tax bill in a strategy known as tax-loss harvesting.
The decision of when to sell is one of the hardest in investing, and it's where human psychology often leads us astray. Many investors fall victim to the disposition effect—the tendency to sell their winning stocks too early to lock in a small gain, while holding on to their losers for far too long, hoping they’ll break even. A disciplined value investor operates differently: