Capital gain calculation in four steps. Determine your basis.The "total payment" on which the Maryland income tax withholding payment to the Clerk or. You may owe capital gains taxes if you sold stocks, real estate or other investments. All of our outstanding shares of common stock were duly authorized and validly issued and are fully paid and nonassessable. A capital gains tax is a levy on the profit that an investor makes from the sale of an investment, such as stock shares. Here's how to calculate it. Fill out the Stock Gift Notification Form to notify the Maryland Food Bank and Brown Advisory about your gift of stock. The board may set this stated value, like par value, at any amount, although some state statutes specify a minimum amount, such as USD 5 per share. If you sell a stock for less than its original purchase price, your investment incurs a capital loss.