Failure pattern · United Kingdom · 2010–2016
BP Deepwater Horizon: the costliest oil spill
An explosion on the Deepwater Horizon rig killed 11 workers and spilled millions of barrels into the Gulf of Mexico over 87 days. Poor communication and safety culture cost BP over $60 billion.
By Shivam Bhandari · Reviewed 31 October 2026 · How we write
by the numbers
- Workers killed
- 11
- Days until capped
- 87
- Initial compensation fund
- $20 billion
- Total costs
- over $60 billion
What happened
On 20 April 2010, a blowout and explosion on the Deepwater Horizon rig, drilling BP's Macondo well in the Gulf of Mexico, killed 11 workers. The well leaked for 87 days before it was capped — the largest marine oil spill in US history, with millions of barrels released.
Investigations pointed to a series of risky decisions, cost and time pressure, and failures by BP and its contractors. BP's communication made things worse: CEO Tony Hayward downplayed the spill early and was widely criticised for saying ‘I'd like my life back.’ He was replaced in October 2010.
BP set up a $20 billion compensation fund, sold assets to raise money, and paid criminal and civil penalties. Total costs exceeded $60 billion.
Timeline
- 2010
Explosion (April); well capped (July); CEO replaced (October).
- 2012
Criminal settlement with US government.
- 2015
Settlement with federal and state governments.
what went wrong
- Cost and schedule pressure on safety-critical decisions.
- Multiple contractors with unclear responsibility.
- Leadership communication that seemed to put the company first.
the lesson
Small safety shortcuts in high-risk operations can create catastrophic, company-threatening losses — and tone-deaf leadership multiplies the damage.
Apply it to your business
- 1Identify your highest-risk operations and over-invest in their safety.
- 2Clarify responsibility when several partners work together.
- 3In a crisis, leaders must show they put victims first.
Laws at work in this story
Figures are rounded and drawn from public reports, company filings and widely cited coverage at the time. Check the company's latest filings before relying on any number.