The OECD continues to refine the practical application of Pillar One Amount B, with updated guidance and enhancements to its pricing tool aimed at improving consistency in transfer pricing for routine distribution activities.
Rather than introducing new rules, these updates help address technical questions and implementation challenges that businesses and tax authorities have been dealing with since Amount B was introduced.
A reminder: what Amount B is trying to solve
Amount B was developed to simplify transfer pricing for baseline marketing and distribution activities, an area that has historically led to significant complexity and disputes.
Instead of relying on detailed benchmarking studies, Amount B applies a standardised return on sales, making outcomes more predictable—especially in jurisdictions with limited resources.
Clarifications through the Amount B FAQs
One of the main challenges with Amount B has been interpretation. The FAQs help narrow those gaps by addressing practical questions that have come up during early implementation.
Areas where clarity has been added
- How the accounts payable guardrail should be applied
- Treatment of working capital components, including intercompany balances
- The role of the 0.5% adjustment range in specific calculations
- Application of Amount B to start-ups or newly established entities
- Clarification of net revenue definitions
- How industry groupings should be determined
These points may seem technical, but they are exactly where differences in interpretation can lead to inconsistent outcomes across jurisdictions.
Pricing Automation Tool: evolving into a practical solution
Alongside the FAQs, the OECD has continued to enhance its Pricing Automation Tool, which is intended to make Amount B easier to apply in practice.
What the tool is designed to do
- Compute the Amount B return for in-scope distributors
- Apply the relevant pricing matrix automatically
- Reduce manual calculations and interpretation
Why the updates matter
The latest version reflects updated data inputs and refinements, ensuring the tool remains aligned with how Amount B is expected to work in practice.
The OECD’s commitment to updating the tool regularly suggests it is becoming a central element of the Amount B framework, not just a supporting resource.
Adoption is not uniform
One of the defining features of Amount B is that it is not mandatory. Jurisdictions can choose whether—and how—to apply it.
This has led to a mixed landscape:
- Some jurisdictions allow elective application by taxpayers
- Others are interested but not yet implemented
- Several have committed to respecting outcomes where Amount B is applied elsewhere
For businesses, this creates both opportunities and risks. While Amount B can simplify pricing in some cases, differences in adoption can lead to mismatches across jurisdictions.
What businesses should be thinking about
As Amount B becomes more embedded in practice, companies should move beyond theory and start assessing real impact.
Key considerations include:
- Whether existing distribution models fall within scope
- How Amount B outcomes compare to current transfer pricing policies
- The potential for double taxation or disputes where jurisdictions take different approaches
- Whether internal systems can handle standardised calculations and reporting
There is also a practical point: no revenue threshold applies, so smaller operations should not assume they are out of scope.
Where this leaves Amount B
The direction is clear—Amount B is moving toward greater standardisation, but not necessarily full harmonisation.
The additional guidance and tool updates are helpful, but they also highlight that implementation will continue to depend heavily on local choices.For tax teams, the priority is no longer just understanding how Amount B works, but tracking how it is being applied across their footprint and adapting accordingly.