The California Court of Appeals affirmed a trial court’s holding that the California Franchise Tax Board can require interstate unitary businesses to use combined reporting, even though combined reporting is optional for intrastate unitary businesses. The taxpayer, a motorcycle retailer, argued that the differential treatment of interstate and intrastate business gave a direct commercial advantage to intrastate unitary companies and therefore discriminated against interstate commerce in violation of the Commerce Clause of the United States Constitution. The appellate court rejected the taxpayer’s argument and held that the legitimate state interest to accurately measure and tax all income attributable to California outweighed any possible discriminatory effect.

Harley-Davidson, Inc. v. California Franchise Tax Bd., Dkt. No. D071669 (Cal. Ct. App. Aug. 22, 2018).