QDMTT and Transfer Pricing: The new power couple that Philippine businesses cannot ignore

What if a transfer pricing adjustment did more than increase corporate income tax? What if it also triggered a global minimum tax exposure for the group?

That possibility lies at the heart of the proposed Qualified Domestic Minimum Top-Up Tax (QDMTT).

In a previous article, A Tax Odyssey: The Philippines' journey toward QDMTT, we explored the Philippines’ proposed adoption of QDMTT and the broader implications of the OECD's global minimum tax framework for multinational enterprises operating in the country. The discussion focused on how QDMTT works and why preserving taxing rights over Philippine income matters. This article turns to another important dimension of the QDMTT conversation: the growing role of transfer pricing in shaping Pillar Two outcomes.

For years, transfer pricing adjustments primarily affected taxable profits and the resulting income tax liability. Under a QDMTT regime, however, the consequences may extend much further. Transfer pricing outcomes could influence jurisdictional effective tax rates under the Global Anti-Base Erosion (GloBE) rules, potentially affecting whether top-up taxes arise, the amount of any resulting top-up tax, and, in some cases, the jurisdiction entitled to collect that tax.

Much of the discussion surrounding QDMTT has focused on the Organisation for Economic Co-operation and Development’s (OECD) 15% global minimum tax, revenue protection, and the preservation of taxing rights. Yet a critical question remains largely overlooked: How will transfer pricing outcomes affect top-up tax liabilities? How will QDMTT reshape transfer pricing risk?

As these two regimes converge, QDMTT and transfer pricing are emerging as the new power couple of international taxation. What were once viewed as separate areas of tax compliance are becoming increasingly interconnected, creating new challenges and opportunities for multinational enterprises.

For Philippine businesses operating within multinational groups, understanding this interaction may soon become as important as understanding either regime on its own. Transfer pricing is no longer merely a tax department concern. In a QDMTT environment, it may become a strategic issue that commands attention in the boardroom.

The first meeting: When tax incentives meet effective tax rates

Historically, discussions on Philippine tax incentives often centered on a single question: How much tax can be saved?

The proposed QDMTT may require businesses to ask a different question altogether: Will the resulting effective tax rate remain above the global minimum threshold?

Under the OECD Pillar Two framework, large multinational groups are generally expected to maintain a minimum effective tax rate (ETR) of 15% in every jurisdiction where they operate. If the ETR falls below that threshold, a top-up tax may arise. The proposed QDMTT seeks to ensure that such top-up tax on Philippine income is collected by the Philippines rather than another jurisdiction. The focus may no longer be simply on reducing taxes, but on maintaining an effective tax rate above the global minimum threshold.

As a result, businesses may increasingly shift their attention from savings to outcomes, and more importantly, the factors that influence them. In a Pillar Two world, tax outcomes depend not only on how much tax is paid, but also on where profits are reported and whether the resulting effective tax rate remains above the minimum threshold. Because transfer pricing determines where profits are reported, it may ultimately influence effective tax rates, potential top-up taxes, and overall Pillar Two outcomes.

That is where transfer pricing enters the picture, no longer merely as a compliance exercise, but as a strategic consideration that may influence a multinational group's Pillar Two position.

The growing attraction: Why transfer pricing matters more than ever

At its core, transfer pricing governs how profits are allocated among related companies within a multinational group. Under a QDMTT environment, however, transfer pricing is no longer just about defending related-party transactions during a tax audit.

Transfer pricing affects profits. Profits affect accounting income. Accounting income affects effective tax rates. Effective tax rates may affect top-up taxes. 

Viewed through a Pillar Two lens, the significance of transfer pricing becomes much clearer. A transfer pricing adjustment may change the amount of income reported in a jurisdiction for GloBE purposes. Depending on how that adjustment changes the balance between profits and taxes within a jurisdiction, the jurisdictional effective tax rate may increase or decrease. Put simply, a transfer pricing adjustment may affect not only how much tax is paid, but whether additional tax becomes payable under the global minimum tax rules. Even where a top-up tax already exists, a transfer pricing adjustment could affect the amount ultimately payable.

Consider a Philippine subsidiary that is subject to a transfer pricing adjustment, the immediate consequence may be additional Philippine income tax. Yet the impact may not stop there: the adjustment could also influence the multinational group's jurisdictional effective tax rate and, depending on the circumstances, its overall Pillar Two position.

In other words, an issue that once affected only the tax assessment of a single entity may now have implications for the broader tax position of the multinational group.

As transfer pricing and QDMTT become increasingly interconnected, what was once viewed primarily as an audit and compliance concern may evolve into a broader strategic and governance consideration. The implications may extend beyond the tax function, requiring closer coordination among finance, tax, incentives, and business leaders. In a Pillar Two environment, transfer pricing may influence whether a top-up tax arises, how much is ultimately payable, and how a multinational group's global minimum tax exposure is determined.

Joining forces: The end of tax silos

Perhaps the most significant implication of QDMTT is not the top-up tax itself, but the need for greater integration across business functions.

Transfer pricing, finance, tax compliance, tax incentives, and financial reporting can no longer be viewed as separate workstreams. What happens in one area may now influence outcomes in another. A transfer pricing adjustment may affect accounting income. Changes in accounting income may affect effective tax rates. Effective tax rates may, in turn, affect potential top-up tax liabilities.

As tax authorities and policymakers place increasing emphasis on transparency, consistency, and economic substance, businesses will need to ensure that the story told by their financial statements, tax returns, transfer pricing documentation, and incentive reports is aligned.

In a Pillar Two environment, it may no longer be sufficient for each function to be correct in isolation. The greater challenge is ensuring that all functions arrive at a consistent outcome and support the same commercial reality.

The question is no longer simply whether the numbers reconcile. It is whether the business can clearly explain why profits were earned where they were earned, why incentives were claimed where they were claimed, and why the resulting tax outcomes are sustainable.

That is the point at which tax, finance, incentives, and transfer pricing cease to be separate workstreams and become part of an integrated decision-making process.

Making It official: From compliance issue to boardroom issue

For many organizations, transfer pricing has traditionally been viewed as a technical matter delegated to tax specialists. That approach may no longer be sufficient.

As QDMTT gains momentum, management may require greater visibility over how related-party transactions affect effective tax rates, potential top-up taxes, and overall tax risk. In the past, transfer pricing discussions often focused on audit defense, documentation, and compliance. In a Pillar Two environment, however, transfer pricing decisions may have broader implications for a multinational group's tax position. 

As a result, transfer pricing may require greater attention not only from tax teams, but also from management, finance leaders, and those responsible for overseeing tax governance and risk.

The existence of a transfer pricing study may no longer be sufficient. The more important considerations are:

1. Does management understand how the group's transfer pricing policies affect its effective tax rates? 
2. Can management explain the potential impact of those policies on top-up tax exposure? 
3. Are transfer pricing decisions aligned with the group's broader tax and business objectives?

These are no longer just tax questions. They are governance questions.

The future together

Much of the discussion surrounding QDMTT focuses on who gets to collect the top-up tax.

For many businesses, the real issue may not be who collects the top-up tax, but what causes it to arise in the first place. Increasingly, part of the answer may lie in transfer pricing.

As QDMTT and transfer pricing become more interconnected, tax incentives, effective tax rates, financial reporting, and tax governance are converging into a more integrated decision-making framework. Decisions made in one area may increasingly influence outcomes in another.

The businesses best positioned for this new environment may not necessarily be those with the lowest tax rates, but those that can clearly demonstrate how value is created, where profits are earned, and why their tax outcomes are sustainable.

After all, every power couple attracts attention. 

As the Philippines moves closer to QDMTT, businesses may discover that the most important relationship in international taxation is no longer QDMTT alone or transfer pricing alone. Understanding that relationship may be the difference between managing compliance and managing tax risk strategically.

That is one power couple Philippine businesses cannot afford to ignore.

As published in BusinessWorld, dated 29 September 2026