The Tax Policy Center has graded the key tax provisions of the pending House stimulus bill (the "American Recovery and Reinvestment Tax Plan of 2009"). Our grades, which rely on the bill's legislative language, focus on how well these measures would boost the economy in the short run. Accompanying write-ups describe current law, the proposed change, and the short- and long-term effects on the budget, the economy, fairness and tax complexity. We will update the report card as we learn more about the provisions and as the stimulus bill moves through Congress.