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Etymology 1[edit]

EB1911 - Volume 01 - Page 001 - 1.svg This entry lacks etymological information. If you are familiar with the origin of this term, please add it to the page per etymology instructions. You can also discuss it at the Etymology scriptorium.
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P45 (plural P45s)

  1. (Britain, Ireland) A form that an employee receives when they terminate their employment, detailing income for social security and taxation purposes for the current financial year.
    • 2012, Forbes, Has Unconventional Oil Production Peaked?
      Get any concessions wrong in advanced markets, and CEO’s know they’ll pay a very heavy price on stock markets. ‘P45’s’ all round, and that’s before we consider any national flags involved, or the small fact that host nations are piling on pressure to get pumps working, donkey’s nodding and receipts rolling in.
See also[edit]

Etymology 2[edit]

From its letter count.



  1. Abbreviation of pneumonoultramicroscopicsilicovolcanoconiosis.