Guide

International tax planning: A guide for tax year 2025

Tax planning guide for U.S. multinational businesses

November 07, 2025
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Supply chain International tax Transfer pricing
Business tax Pillar two Tax policy Indirect tax

Guide to international tax planning

The international tax landscape is undergoing a profound transformation, driven in 2025 by legislative reform, global coordination efforts and evolving compliance demands. This guide equips U.S. multinational businesses with insights needed to navigate these changes and align their tax strategies with broader business objectives.

At the heart of this year’s developments is the One Big Beautiful Bill Act (OBBBA), which introduces sweeping updates to U.S. international tax rules. While OBBBA’s impact is major—redefining regimes such as FDDEI (formerly FDII), GILTI (now NCTI) and subpart F—it is only part of a larger evolution that includes trade and tariff challenges, global reforms involving the digital economy and evolving reporting requirements.

As multinational enterprises (MNEs) prepare for 2026 implementation deadlines, proactive modeling, cross-functional coordination and strategic planning are essential. This guide is designed to help tax leaders identify risks, uncover opportunities and stay ahead of regulatory developments in the evolving global tax environment.


International tax planning considerations

Global information reporting


OBBBA: What it means for your business strategy

OBBBA tax changes are reshaping how businesses plan, invest, and operate. Our modeling service helps you understand the impact on cash flow, structure, and strategy—so you can move forward with confidence.

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