Global Minimum Tax Challenges All Hands at Accounting’s Big Four

Helping multinational companies comply with the 15% global minimum tax is a mammoth, all-hands-on-deck task that requires coordination within top accounting firms and can’t be accomplished by their tax departments alone.

Leaders at three of the Big Four accounting firms—KPMG LLP, PricewaterhouseCoopers LLP, and Deloitte & Touche LLP—say tax lawyers, tax accountants, information technology experts, and auditors are creating sophisticated data collection and calculation tools for their clients who need to synthesize thousands of pieces of information to calculate their tax bills.

There’s also a huge training task ahead to help practitioners across all departments understand the rules. Both lawyers ...