The trillion dollar coin is a concept that emerged during the United States debt-ceiling crisis in 2011, as a proposed way to bypass any necessity for the United States Congress to raise the country's borrowing limit, through the minting of very high-value platinum coins. The concept gained more mainstream attention by late 2012 during the debates over the United States fiscal cliff negotiations and renewed debt-ceiling discussions. After reaching the headlines during the week of January 7, 2013, use of the trillion dollar coin concept was ultimately rejected by the Federal Reserve and the Treasury. Five days later, Senate Minority Whip John Cornyn announced that Senate Republicans would end their threat to block an increase in the debt ceiling.
The issuance of paper currency is subject to various accounting and quantity restrictions that platinum coinage is not. According to the United States Mint, coinage is accounted for as follows:
Since Fiscal Year (FY) 1996, the Mint has operated under the United States Mint Public Enterprise Fund (PEF). As authorized by Public Law 104-52 (codified at 31 U.S.C. § 5136), the PEF eliminates the need for appropriations. Proceeds from the sales of circulating coins to the Federal Reserve Banks (FRB), bullion coins to authorized purchasers, and numismatic items to the public and other customers are paid into the PEF and provide the funding for Mint operations. All circulating, bullion and numismatic operating expenses and capital investments incurred for the Mint's operations and programs are paid out of the PEF. By law, all funds in the PEF are available without fiscal year limitation. Revenues determined to be in excess of the amount required by the PEF are transferred to the United States Treasury General Fund as off-budget and on-budget receipts. Off-budget receipts consist of seigniorage, the difference between the receipts from the Federal Reserve System from the sale of circulating coins at face value and the full costs of minting and distributing circulating coins. Seigniorage is deposited periodically to the General Fund where it reduces the government's need to borrow.