For tax purposes, capex is a cost that cannot be deducted in the year in which it is paid or incurred and must be capitalized. The general rule is that if the acquired property's useful life is longer than the taxable year, then the cost must be capitalized. The capital expenditure costs are then amortized or depreciated over the life of the asset in question. Further to the above, capex creates or adds basis to the asset or property, which once adjusted, will determine tax liability in the event of sale or transfer. In the US, Internal Revenue Code §§263 and 263A deal extensively with capitalization requirements and exceptions.