There are two types of death taxes that you should be concerned about: the federal estate tax and state estate tax. The federal estate tax is computed as a percentage of your net estate. Your net taxable estate is comprised of all assets you own or control minus certain deductions. Such deductions can be for administrative expenses such as funeral and burial costs as well as charitable donations. The federal estate tax as of 2013 taxes estates with net assets of $5,250,000 or greater.
Even if you believe that you may not be affected by the federal estate tax, you still need to determine whether you may be subject to state estate and inheritance taxes. Further, you may have a taxable estate in the future as your assets appreciate in value. You should regularly review your estate plan with an estate planning attorney to ensure your estate plan takes into account changes in the tax laws as well as shifts in your individual circumstances.