Calculated cost basis is an accounting term that refers to the original value of an asset for tax purposes. It is used in calculating profits or losses when selling the asset. The cost basis typically includes all expenses related to the purchase of the asset, including applicable taxes and sales costs. Cost basis can also refer to the initial value of a gift, retirement account, inheritance, or other non-purchase transaction. For example, if you received a stock as a gift, your cost basis would be the price at which it was purchased by the person gifting it to you. By understanding calculated cost basis, investors and financial advisors can accurately measure and report realized gains or losses in a portfolio.