Companies save money by hiring good corporate lawyers, not accountants. It's business structure and diversion of tax liability that makes the most savings for a business. If you're relying on an accountant to cook the books to save money, you've already left it too late. Most accounting in business is largely automated now already, between expense tracking and asset depreciation and whatnot. It's not like businesses are going through paper books or filing cabinets to generate their taxes anymore.