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Ringfencing or Ring-fencing occurs when a portion of a company's assets or profits are financially separated without necessarily being operated as a separate entity. This might be for:

  • regulatory reasons,
  • creating asset protection schemes with respect to financing arrangements, or
  • segregating into separate income streams for taxation purposes.

Asset protection[edit]

In asset protection arrangements, ring-fencing can be employed through segregating specific assets and liabilities into separate companies of a corporate group.[1][2] It can also be used as a method for mitigating liquidation risk or to improve a corporate credit rating.

Separation for tax purposes[edit]

In the United Kingdom, ring fence profits arise from income and gains from oil extraction activities or oil rights in the UK and UK continental shelf, and are subject to a higher rate of corporation tax.[3] This petroleum fiscal regime can be seen in other countries as well.[4]

Regulatory separation[edit]

In the case of loans or bonds, ringfencing generally allows an investor to have both a link to a specific asset they possess (such as wind farms owned by a utility), while also enjoying the full credit support of a utility's balance sheet.

One common form of ringfencing is when a regulated public utility business financially separates itself from a parent company that engages in non-regulated business. This is done mainly to protect consumers of essential services such as power, water and basic telecommunications from financial instability or bankruptcy in the parent company resulting from losses in their open market activities. Ringfencing also keeps customer information within the public utility business private from the for-profit efforts of the parent company's other business.

A high-profile success story with utility ringfencing occurred during the Enron meltdown of 2001–2002; Enron acquired Oregon-based Portland General Electric in 1997, but the local power generator was ringfenced by the state of Oregon prior to the acquisition being completed. This protected Portland General Electric's assets, and its consumers, when Enron declared bankruptcy amid massive accounting scandals. There were examples of this in other US states as well.[5]

Arising from the 2008 financial crisis, the largest banks in the United Kingdom are required by the Financial Services (Banking Reform) Act, 2013 to ring-fence their retail operations in order to increase depositor protection.[6] Ring-fencing arrangements must be in place by 1 January 2019.[7] The Prudential Regulation Authority is the lead regulator for ring-fencing, with responsibility for identifying which banks are within the scope of the ring-fencing legislation and for supervising banks’ implementation of the rules.[8]


  1. ^ Estelle Clarke. "Feeling the squeeze, Part 3: Ring-fencing for the protection of care sector borrowers in finance arrangements" (PDF). Retrieved 2012-01-29.
  3. ^ "Corporation Tax rates". Retrieved 2012-01-29.
  4. ^ "Types of International Petroleum Fiscal Regimes: Ring Fencing, Reserve Treatment". Retrieved 2012-01-29.
  5. ^ "Ring Fencing Mechanisms for Insulating a Utility in a Holding Company System" (PDF). Retrieved 2012-01-29.
  6. ^ "Whoops! Ring-fencing retail banks could backfire". Retrieved 2012-01-29.
  7. ^ Santander Bank, Ring-fencing overview, accessed 2 December 2017
  8. ^ Financial Conduct Authority, Ring-fencing, 14 September 2016, updated 6 November 2017, accessed 2 December 2017

See also[edit]