Categories: Law and Justice

Inside the UN’s Push for a Global Tax Cooperation Treaty

Diplomats gathered at United Nations headquarters in New York from August 3 to 13 for the fifth negotiating session on a UN Framework Convention on International Tax Cooperation, a project aimed at giving every country, rich or poor, a genuine seat at the table when global tax rules are written. The session pushed the talks from broad political commitments into the harder work of drafting actual treaty text, and it exposed just how far apart countries still are on the fundamentals.

What the Convention Is Trying to Do

The idea for a UN-led tax convention emerged from long-standing frustration, mostly among developing nations, that international tax rules have historically been shaped inside clubs like the OECD, where they have limited influence. The UN General Assembly responded by creating an Intergovernmental Negotiating Committee (INC) tasked with drafting a framework convention plus two early protocols, in a process running from 2025 through 2027. The stated goal is a fully inclusive and more effective system of international tax cooperation that curbs base erosion and distributes taxing rights more fairly.

A Fifth Round, Still No Consensus

Delegates spent the August session reviewing draft text line by line, with particularly sharp disagreement over Article 4, which sets out the convention’s guiding principles. Some countries want sustainable development, inequality reduction and human rights written in as binding, operational commitments; others prefer they remain aspirational language with no real teeth. That disagreement mirrors a bigger split: many wealthier, OECD-aligned countries are pushing for weaker obligations, more optional provisions and explicit protection for their existing bilateral tax treaties, while lower-income countries want a convention that actually changes how the current system works.

The stalemate echoes a pattern seen elsewhere, including in the slower-moving domestic regulatory gridlock around US stablecoin and crypto rules: writing new global rules is far easier in principle than in practice, especially once real financial interests are on the table.

Why Developing Countries Are Pushing So Hard

One recurring, technical-sounding issue carries outsized weight: access to reliable transfer pricing comparables, the market data multinational companies and tax authorities use to check whether cross-border transactions between related entities are priced fairly. Developing countries often lack access to the same databases wealthier nations use, which puts their tax authorities at a structural disadvantage in disputes with multinational firms and contributes directly to lost revenue.

Negotiations run under a UN-mandated timeline from 2025 to 2027
The fifth INC session took place August 3–13, 2026 at UN headquarters in New York
The framework convention is being negotiated alongside two early protocols
Article 4’s principles remain contested between OECD-aligned and developing-country blocs
Unequal access to transfer pricing data is a key driver of cross-border tax disputes

Part of a Broader Wave of Global Rule-Making

Tax is far from the only arena where international cooperation is being tested and rebuilt from the ground up. Governments are simultaneously negotiating new rules for artificial intelligence, echoed in the debates already surrounding the rapid consumer rollout of AI-driven devices, and for technologies with strategic value that cross borders just as easily as capital does, the kind of cross-border scientific collaboration seen in recent battery research breakthroughs developed jointly by German and Chinese scientists. Each case raises the same underlying question the UN tax talks are grappling with: who gets to set the rules when the activity itself no longer respects national borders.

Frequently Asked Questions

What is the UN Framework Convention on International Tax Cooperation?

It is a proposed international treaty, negotiated through a UN-mandated Intergovernmental Negotiating Committee, intended to create a more inclusive and effective system for coordinating tax rules between countries, alongside two supporting protocols.

Why do developing countries support a UN-led process instead of the OECD?

Developing countries have historically had limited influence over tax rules set through OECD-led forums. A UN process gives every member state an equal vote, which many lower-income countries see as a fairer way to address issues like base erosion and unequal access to tax-relevant data.

When will the convention be finalized?

The negotiating mandate runs from 2025 to 2027. The fifth session concluded in August 2026 with the core text still under negotiation, and further sessions are expected before a final agreement is reached.