My friends grand father just died, and he left them over $80 million in inheritance money in Israel. Is that money taxable in the US even though it’s in Israel? Will he need to pay taxes on it when his family transfers the money over to the US?

There’s no Federal inheritance tax.

Some states do have one so where you live will determine if any is due.

With that much money coming in, you will DEFINITELY need to file a Form 3520 report http://www.irs.gov/pub/irs-pdf/f3520.pdf by the filing deadline for the tax year that the money is received. No tax is due with the report but the failure to file and late filing penalties are SEVERE.

If anyone in the US has signatory authority over any of the foreign accounts involved in the transfer, a TD F 90-22.1 report http://www.irs.gov/pub/irs-pdf/f90221.pdf will also be due by June 30th of the following year. Again there’s no tax but the penalties for failure to file or late filing are SEVERE.

NB: If your grandfather is a US expatriate under US law, i.e he surrendered his US citizenship and moved to Israel, contact a tax pro in the US as there are new taxes that MAY be due depending upon how long it’s been since he gave up his US citizenship.