A bill to amend the Congressional Budget and Impoundment Control Act of 1974 to prohibit the consideration of retroactive tax increases.

Amends the Congressional Budget and Impoundment Control Act of 1974 to prohibit the House of Representatives or the Senate from considering any bill, joint resolution, amendment, motion, or conference report that increases a tax and applies such increase to taxable years beginning before the date of the enactment of the law (retroactive tax increases). Provides that a point of order raised under any such measure may be waived only by a three-fifths vote in the Senate.