The US allows a tax credit for CO2 sequestration of USD10.44 per metric ton (2012 rate) for CO2 used as a tertiary injectant and then permanently sequestered; USD20.88 (2012 rate) for CO2 permanently sequestered without first being used as tertiary injectant. This incentive will close in the year in which the Internal Revenue Service determines that 75 million metric tons of CO2 have been captured and sequestered.