The portability election allows a surviving spouse to use any unused federal estate tax exemption from their deceased spouse’s estate, adding it to their own exemption. It is one of the most consequential and most frequently missed steps in estate administration — and its deadline is unforgiving. What It Is Each person has a federal estate tax exemption — the amount they can transfer at death free of federal estate tax.

A QTIP trust — Qualified Terminable Interest Property trust — is an estate planning vehicle that provides income to a surviving spouse during their lifetime while preserving the principal for beneficiaries of the deceased spouse’s choosing. It is the primary tool for balancing marital security against inheritance control in blended families and large estates. What It Is When one spouse dies, assets passing to the surviving spouse qualify for the unlimited marital deduction — no estate tax is owed on transfers between spouses at death.