Capital Gains Tax Calculation. Capital gains tax is paid on the remaining profit after adjusting the cost basis for depreciation recapture: Adjusted cost basis = $150,000 cost basis - $24,545 depreciation expense = $125,455. $200,000 sale price - $125,455 adjusted cost basis = $74,545 capital gain. Under IRS tax rules, every gift of real estate is considered a gift of equity. The value of real estate for gift tax purposes is set at fair market value. This means that your parents have to pay gift tax on the price that the real estate would bring on the open market. According to the terms of the IRS rule, the value of the gift at fair.