Prior to 2011, the most efficient estate tax planning for married couples required a minimal level of asset equalization. In order to take maximum advantage of all existing wealth transfer tax exemptions and credits, each spouse needed to own, in an estate tax sense, enough assets to be able to...

In 1981, Congress enacted the qualified terminable interest property (QTIP) provisions that allow an estate and gift tax marital deduction for the full value of the underlying property where a spouse receives only a qualifying income interest for life and where the executor of the estate or the...