ESPP -> Got them one day, sold them the next day to maximize the 15% discount. Since the basis was post-tax dollars, only the gain needs to be calculated. Stock Options: One day buy-and-sell. What is the cost-basis: is it my option price or market price per share? What is the taxable part? The (sale price - option price) or the sale price? Restricted Stock Units: Got x amounts of RSU. Taxed immediately, so I only got (2x/3) of the granted amount. Again, where do I start with the stock price since these are "free" shares? Any examples will be helpful. I do not want to go and get the IRS Tax Publication workbook from my local IRS office. Thanks.