OECD stuck on simplifying pillar two

International Tax Review is part of Legal Benchmarking Limited, 1-2 Paris Garden, London, SE1 8ND

Copyright © Legal Benchmarking Limited and its affiliated companies 2025

Accessibility | Terms of Use | Privacy Policy | Modern Slavery Statement

OECD stuck on simplifying pillar two

The OECD is asking for feedback on technical challenges in pillar two

The OECD is tinkering with technical challenges in its global anti-base erosion (GloBE) proposal under pillar two of the digital tax proposals as part of a public consultation.

The OECD’s latest consultation document, released on November 8, sets rules to maintain a minimum tax rate worldwide. The rules aim to address risks from structures that allow companies to shift profits to jurisdictions where they are subject to either no or low taxation. The organisation is seeking public input by December 2.

The OECD ‘Programme of Work on Pillar Two’ consultation document is seeking feedback on simplifications, thresholds, carve-outs, and exclusions from the suggested pillar two rules. There are already design issues that need to be addressed such as the determination of an appropriate tax base.

“There has been renewed interest in accounting standards for a possible basis for taxation. That has been off the table for many years, but now it is front of mind again,” said Eelco van der Eden, partner at PwC Netherlands.

International Financial Reporting Standards (IFRS) were built on top of International Accounting Standards, which could serve as a possible starting point for discussions ahead. The OECD consultation document suggests financial accounts as the gateway to coming up with a common tax base. The only countries without an IFRS mandate are the US, Japan, and China.   

Before the OECD opened the public consultation on its GloBE proposals to improve simplicity and minimise double taxation and compliance costs, tax professionals were concerned about keeping controlled foreign corporation (CFC) rules in addition to GloBE rules. This is part of the issue when it comes to finding an appropriate tax base.

“It might really overdo the whole thing,” said Wolfgang Schön, professor of tax law at the Max Planck Institute for Tax Law and Public Finance, about the combination of CFC and GloBE taxation.

Chief policymakers and tax professionals told ITR that if the OECD fails to implement such rules then the status quo will likely fall to unilateral measures that harm taxpayer interests and the expansion of the digital economy. The following fixed order of GloBE rules proposed by the OECD aim to curb the wider risk of such unilateral measures:

  • An income inclusion rule, which taxes foreign entity income if it is subject to an effective tax rate below the minimum rate;

  • Undertaxed payments rule denies deductions on source-based taxation if payments are not subject to a minimum tax rate;

  • Switch-over rule for tax treaties permits residence jurisdictions to switch from an exemption to a credit method where profit from a permanent establishment is subject to tax below a minimum rate; and

  • Subject to tax rule applies withholding tax to income at the source and adjusting eligibility for treaty benefits on certain income taxed below a minimum rate.

The proposed four rules focus on preventing double taxation by amending tax treaties and domestic rules to give jurisdictions taxing rights where other jurisdictions allow low levels of effective taxation.

However, the mechanics and operation of the undertaxed payment rule and the nature and scope of the subject to tax rule need to be further developed by the Inclusive Framework for a clearer outline of these rules to emerge.

Under the Programme of Work on Pillar Two, the OECD has requested input on three technical aspects of the GloBE proposal, including the extent a multinational company can combine income and taxes from different sources to determine effective tax rates on income. The OECD also opened the consultation to input on the wider implications and structure of pillar two.

Along with using financial accounts as a starting point for determining the tax base and understanding how companies combine income and taxes from different sources, the OECD is looking for input on what sectors to carve out and tax thresholds to consider under GloBE rules.

The OECD will follow the consultation with a meeting on December 9 to provide stakeholders an opportunity to comment on ongoing work, specifically the three technical design aspects.

more across site & shared bottom lb ros

More from across our site

Awards
The firms picked up five major awards between them at a gala ceremony held at New York’s prestigious Metropolitan Club
The streaming company’s operating income was $400m below expectations following the dispute; in other news, the OECD has released updates for 25 TP country profiles
Software company Oracle has won the right to have its A$250m dispute with the ATO stayed, paving the way for a mutual agreement procedure
If the US doesn't participate in pillar two then global consensus on the project can’t be a reality, tax academic René Matteotti also suggests
If it gets pillar two right, India may be the ideal country that finds a balance between its global commitments and its national interests, Sameer Sharma argues
As World Tax unveils its much-anticipated rankings for 2026, we focus on EMEA’s top performers in the first of three regional analyses
Firms are spending serious money to expand their tax advisory practices internationally – this proves that the tax practice is no mere sideshow
The controversial deal would ‘preserve the gains achieved under pillar two’, the OECD said; in other news, HMRC outlined its approach to dealing with ‘harmful’ tax advisers
Former EY and Deloitte tax specialists will staff the new operation, which provides the firm with new offices in Tokyo and Osaka
TP is a growing priority for West and Central African tax authorities, writes Winnie Maliko, but enforcement remains inconsistent, and data limitations persist
Gift this article