Tax free acquisition A merger or consolidation in which 1) the acquirer's tax basis in each asset whose ownership is transferred in the transaction is generally the same as the acquiree's, and 2) each seller who receives only stock does not have to pay any tax on the gain he realizes until the shares are sold. Tax haven A nation with a moderate level of taxation and/or liberal tax incentives for undertaking specific activities such as exporting or investing. Tax Reform Act of 1986 A 1986 law involving a major overhaul of the . tax code. Tax shield The reduction in.