Qualified Terminable Interest Property Trust
in general, transfers of property between spouses can be made federal gift and estate tax free under the unlimited marital deduction. However, transfers of terminable interests to spouses are disqualified from the marital deduction. A terminable interest is one that terminates or fails at a certain time or upon an occurrence or lack of occurrence of a certain event or contingency. A QTIP trust is an exception to this rule.
A QTIP trust is used when a spouse or both spouses want property of the first spouse to die to qualify for the marital deduction and provide lifetime income to the surviving spouse, but also want that property to be preserved and ultimately passed on to other beneficiaries.