Tyler Pipe Industries, Inc. v. Washington State Department of Revenue

In Armco Inc. v. Hardesty, 467 U. S. 638 (1984), we held that West Virginia’s gross receipts tax on the business of selling tangible property at wholesale discriminated against interstate commerce because it exempted local manufacturers. The principal question in these consolidated appeals is whether Washington’s manufacturing tax similarly violates the Commerce Clause of the Constitution because it is assessed only on those products manufactured within Washington that are sold to out-of-state purchasers. We conclude that our reasons for invalidating the West Virginia tax in Armco also apply…