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

RSM contributors

  • Yushu Ma
    Yushu Ma
    Supervisor
  • Aureon Herron-Hinds
    Aureon Herron-Hinds
    Principal, Washington National Tax
  • John Kim
    John Kim
    Senior Manager
  • Kaatje Street
    Kaatje Street
    Principal
  • Yen Lee
    Yen Lee
    Manager
  • Jodi Ader
    Jodi Ader
    Senior Manager
  • Adam Chesman
    Adam Chesman
    Senior Manager
  • Ayana Martinez
    Ayana Martinez
    Principal
  • Ramon Camacho
    Ramon Camacho
    Principal
  • Lynn Dayan
    Lynn Dayan
    Manager
  • Mandy Kompanowski
    Mandy Kompanowski
    Manager

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