U.S. taxpayers with foreign accounts whose aggregate value exceeded $10,000 at any time during 2012 must file Treasury Department Form TD F 90-22.1 (Report of Foreign Bank and Financial Accounts) with the Treasury Department by June 30, 2013. The form must be received by the Treasury Department on or before June 30, 2013. This year, June 30 is a Sunday, therefore, taxpayers must ensure that Treasury receives the form before June 30.

The civil penalty for willfully failing to file an FBAR can be as high as the greater of $100,000 or 50 percent of the total balance of the foreign account per violation. Non-willful violations that the IRS determines were not due to reasonable cause are subject to a $10,000 penalty per violation. Form TD F 90-22.1 can be found here: Form TD F 90-22.1.