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CFC Worthless Stock Loss Deduction Rules: GILTI and BEAT Limitations to Deductibility of Insolvent Foreign Stock

Recording of a 110-minute CPE webinar with Q&A

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Conducted on Tuesday, December 17, 2019

Recorded event now available

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This course will provide corporate tax advisers with a practical guide to claiming deductions of worthless stock in the context of controlled foreign corporations (CFCs) after the 2017 tax reform law. After briefly outlining the prior treatment allowing for a full deduction for worthless stock in a CFC, the panelist will detail how the GILTI provisions can reduce the tax benefit a U.S. parent may claim for CFC stock that becomes worthless.


Among the significant and unanticipated changes brought about by the 2017 tax reform law is the treatment of worthless stock in a CFC. The new GILTI and BEAT provisions will in many cases serve to limit the deduction available to U.S. owners of CFCs when the corporation stock is deemed worthless.

Section 165(g)(3) provides an exception to the general capital loss rules governing worthless stock by allowing a U.S. corporation to claim an ordinary loss deduction when securities of defined affiliated corporations become worthless during the tax year. Prior treatment allowed corporations to use entity selection strategies to claim worthless stock deductions as a planning tool for a corporate owner of an affiliated CFC.

However, the Section 951A GILTI regime requires a basis adjustment through its "tested income/tested loss" calculations. When a U.S. corporate owner disposes of stock in an affiliated CFC, the domestic corporation must reduce its basis in the CFC stock, potentially creating a gain on sale or exchange, and reducing the tax benefit of the worthless stock deduction.

Also impacting the deductibility of worthless CFC stock is the BEAT regime of Section 59A. The base erosion provisions may qualify a liquidation event of an affiliated CFC to satisfy intercompany debt owed by the CFC as a base erosion payment, which would be subject to a BEAT liability. Tax advisers must be able to evaluate the overall tax treatment of excess foreign tax credits to determine whether to plan into GILTI or Subpart F.

Listen as Robert Hallman, Director at CLA, reviews the changes to the treatment of worthless stock in an affiliated CFC and provides a practical guide to maximizing tax benefits of liquidation in insolvency scenarios.



  1. Existing Subpart F framework
  2. Expansion of Subpart F in the new tax reform law
  3. Expanded definition of a CFC and U.S. shareholder
  4. Additional income included in the calculation base
  5. Downward attribution rules
  6. Section 951A GILTI rules
  7. Treatment of excess foreign tax credits GILTI vs. Subpart F income
  8. Planning opportunities to elect into Subpart F to utilize carryforward CFCs


The panelist will discuss these and other relevant topics:

  • How the 2017 tax law's expansion of the definitions of CFCs and U.S. shareholders will create new tax and reporting obligations for U.S. taxpayers previously exempt from filing duties
  • Constructive ownership tests in CFCs after the new downward attribution rules
  • How the Subpart F changes run counter to the tax law's general aim to convert to more territorial taxation of U.S. taxpayers as opposed to global-based
  • Treatment of earnings invested in U.S. property


Hallman, Robert
Robert Hallman


Mr. Hallman has over a decade of international tax experience including roles in Big 4, middle-market and industry. His...  |  Read More

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