IRS interest rates are unchanged for the fourth quarter of 2014 (October 1, 2014, through December 31, 2014). These are the rates changed on underpayments and overpayments:
The 3% rate applies to underpayments of estimated taxes by individuals. All of these rates have held steady since October 1, 2011.
Source: Rev. Rul. 2014-23
A statutory term describing the cost used to determine your profit or loss from a sale or exchange of property. It is generally your original cost, increased by capital improvements, and decreased by depreciation, depletion, and other capital write-offs.