Royalties are excluded, and the IRS has clamped down more in defining what exactly counts as income tax, but it's still common for oil and gas companies to structure their payments as taxes to get the credits. For instance, in Saudi Arabia, there is an 85% corporate tax rate on oil/gas companies and a 20% corporate tax rate on the average business. It sure looks to me like that's a 20% tax rate plus a 65% royalty rather than an 85% rate, no?

http://taxfoundation.org/blog/treating-royalties-governments...