For your information below is the Unified Estate Tax Rate Schedule, and the list of Estate Tax Exemptions and the Generation Skipping Tax Exemptions.
Presently estates valued at more than Two Million Dollars the Estate Tax is, at least, forty-five (45%) percent on every dollar over the exemption. You pay, at least, forty-five cents on every dollar in the estate over the Two Million Dollar threshold, or put plainly you keep no more than fifty-five cents on each dollar of the decedent's estate after the first Two Million Dollars.
The federal estate tax is an excise tax imposed on the transfer of property from a decedent and is based on the net sum of the decedent's estate, that is the gross estate value less allowable deductions. The Federal Estate Tax return when required must be filed within nine months of the decedent's death or an extension requested to avoid a serious penalty of five (5%) percent per month.

Estate Exemption Per Person and Estate Tax

Calendar Year	Exemption	GST Exemption	Estate Tax
2001 (old law)	$650,000.00	$1,060,000.00	55%
2002	$1,000,000.00	$1,100,000.00	50%
2003	$1,000,000.00	$1,120,000.00	49%
2004	$1,500,000.00	$1,500,000.00	48%
2005	$1,500,000.00	$1,500,000.00	47%
2006	$2,000,000.00	$2,000,000.00	46%
2007	$2,000,000.00	$2,000,000.00	45%
2008	$2,000,000.00	$2,000,000.00	45%
2009	$3,500,000.00	$3,500,000.00	45%
2010	Estate Tax Repealed	No Death Tax	Estate Tax Repealed
2011 old law reinstated	$1,000,000.00	$1,120,000.00	55%