Leaders of the world’s largest economies hailed a recent agreement to overhaul global corporate tax rules as key ensuring multinationals paid their fair share of tax.

The October deal established a global minimum corporate tax rate of 15% aimed at curtailing profit-shifting to lower-tax jurisdictions such as Ireland, where many large international firms have their European headquarters. "It will eliminate incentives to shift jobs and profits abroad,” U.S. President Joe Biden in early October.

But some companies could still use Ireland to reduce their tax bills even after the agreement takes effect, according to tax specialists and a review of corporate filings.