Diamonds: Uncut. The Base Erosion and Profit Shifting Challenges


First Global Conference of the Platform for Collaboration on Tax
14-16 February 2018


Diamonds: Uncut. 
The Base Erosion and Profit Shifting Challenges

15 February 2018 • 13:30-14:30


This high-level learning event was organised by the Tax Inspectors Without Borders (TIWB) Secretariat in partnership with the African Tax Administration Forum (ATAF). It brought together senior level figures from governments, regional tax organisations and civil society to discuss the BEPS challenges inherent to diamond valuation. 


The Base Erosion and Profit Shifting Challenges

This side event, organised by the TIWB Secretariat in partnership with ATAF, took place on 15 February 2018 from 13:30-14:30 in Conference Room 11, United Nations Headquarters, New York, United States.

Diamond producing and exporting countries face acute domestic resource mobilisation (DRM) challenges, particularly in Africa, on account of particular industry challenges, including tracking and valuation of diamond production. Accurate valuation of both rough and polished diamonds for export is essential in ensuring the producing country receives an appropriate share of the final price paid by jewellery buyers, other intermediaries and ultimately, retail customers. For countries that are dependent on these precious stones, millions of dollars are at stake when assessing their value for tax purposes and this often represents a significant percentage of the tax base of diamond rich developing countries.

The complexity of the industry, together with tax base erosion and profit shifting issues, pose major information gaps and uncertainty for tax administrations in developing countries where diamonds are mined. TIWB is working in close co-operation with ATAF in providing hands on tax audit support in Africa matching up tax audit experts with industry experts, including diamond industry specialists, and bringing in that combination of skills to assist African countries harness their tax mobilisation capacity in this sector. TIWB’s objectives are to equip tax officials with the necessary tools to tax local economic activity and value creation in accordance with international standards and principles, and to help create a predictable tax environment for all taxpayers.



  • Warren F. Boyd - Gemmologist/Geologist
  • William Nkitseng - Director - Large Taxpayers' Unit, Botswana Unified Revenue Service
  • Elfrieda Tamba - Commissioner General of Taxation, Liberia Revenue Agency
  • Logan Wort - Executive Secretary, African Tax Administration Forum

Diamonds: Uncut. The Base Erosion and Profit Shifting Challenges.

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