UK North Sea operating costs fall 9% as production efficiency improves

UK offshore operators reduced unit operating costs to £17.81/boe in 2025, supported by higher production efficiency and the addition of newer, lower-cost fields.
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Oct. 1, 2026
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Why this news matters:

  • UK Continental Shelf operators reduced average unit operating costs by 9% year over year, improving competitiveness despite a mature basin environment. 

  • Higher production efficiency and the addition of newer fields helped offset costs while overall production remained essentially unchanged. 

  • The NSTA expects costs to rise modestly in 2026-27, highlighting the importance of operational efficiency and technology adoption.

 

ID 474698286 © Neil Benison | Dreamstime.com
Offshore oil and gas platforms in the North Sea

Newer field developments and higher production efficiency helped reduce UKCS unit operating costs in 2025.

UKCS operating costs at a glance (2025)

  • Average unit operating cost: £17.81/boe

  • Year-over-year change:-9%

  • Total UKCS operating costs: £7.1 billion

  • Production efficiency: 76%

  • UKCS production: ~1.1 MMboe/d

  • Average Brent price: $69.09/bbl

  • Projected 2026-27 unit cost: £18-19/boe

  • Change vs. 2025: +1% to +7%

UK offshore operators delivered lower cost production last year, according to the North Sea Transition Authority (NSTA).

Expenditure per barrel was 9% lower than in 2024, averaging £17.81 ($23.51) in 2025, according to the NSTA’s UKCS Unit Operating Cost report. Last year, the average Brent crude price was £52.33 ($69.09) per barrel.

The improvements come as operators work to maintain competitiveness in a mature basin facing declining output from older fields and continued uncertainty over future investment levels.

UKCS opex fell from £7.8 billion ($10.29 billion) in 2024 to £7.1 billion ($9.37 billion) in 2025, while production in both years hovered around 1.1 MMboe/d.

Source: NSTA UKCS Unit Operating Cost Report
Chart: UKCS Unit Operating Cost

UKCS unit operating costs fell from £19.60/boe in 2024 to £17.81/boe in 2025. 

Production efficiency (comparing actual production with the maximum potential output), rose last year by one percentage point to 76%. This was another factor behind the improved unit operating cost (UOC).

A field's UOC can also be impacted by infrastructure, water depth and age. As various older fields with high costs ceased production and other new fields came online in 2025, this too had a beneficial influence. Newer developments typically benefit from more efficient infrastructure and lower operating costs than many mature UKCS assets.

“Unit costs improved in all regions of the UK Continental Shelf in 2025, which is encouraging," said Loraine Pace, head of Performance and Planning at the NSTA. “However, with costs projected to rise slightly in 2026 and 2027 [£18-19/boe, or $23.77-$25.09/boe], it is important that operators focus on efficiency, continue to innovate and use new technologies, and share lessons to keep a lid on costs, while continuing to undertake necessary maintenance.”

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About the Author

Jeremy Beckman
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Jeremy Beckman

Staff Writer / Editor, Europe

Jeremy Beckman has been Editor Europe, Offshore since 1992. Prior to joining Offshore he was a freelance journalist for eight years, working for a variety of electronics, computing and scientific journals in the UK. He regularly writes news columns on trends and events both in the NW Europe offshore region and globally. He also writes features on developments and technology in exploration and production.

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