Coin Modernization and Taxpayer Savings Act of 2008 - Requires the one-cent coin (except for Lincoln Bicentennial Numismatic Pennies) to be produced primarily of steel and treated to impart a copper color to its appearance similar to one-cent coins produced of a copper-zinc alloy.
Authorizes the Secretary of the Treasury, in the alternative, during the 90 days following enactment of this Act, to add any other element to any alloy of zinc and copper of which one-cent coins could have been composed before enactment of this Act, if during such 90-day period another element is determined to help produce one-cent coins of the same diameter, general composition, and general weight, but at a lower unit cost. Requires a prompt report to Congress if such a determination is made.
Directs the Secretary, two years after enactment of this Act, to produce only five-cent coins primarily made of steel with a coating of nickel, unless by that time the unit cost of production of existing five-cent coins is lower than their face value. Requires the Secretary, however, to recommend a different metallic content of circulating five-cent coins if any biennial report to Congress, required by this Act, indicates that such a different metallic content is both functional and interchangeable with existing coins, and more economical to produce in both the short and long term.
Authorizes the Secretary, in order to accomplish the goals of this Act, to research, develop, evaluate or begin to use new metallic material for circulating coin production.
Requires the Secretary to report biennially to specified congressional committees on the production costs for each circulating coin, cost trends, and possible new metallic materials or technologies for the production of circulating coins, with detailed recommendations for any appropriate changes to the metallic content of circulating coins.