Roche Holding AG is reining in spending with the Big Four accounting firms and will require any future consultancy work to be pre-approved by the Swiss drugmaker’s chief financial officer.

Roche’s new policy applies to Deloitte, PwC, EY and KPMG LLP with immediate effect, the company said in a statement in response to questions from Bloomberg. It’s a fresh sign of how companies are cutting back on advisory fees due to cost pressures including the rise of artificial intelligence.