Harbour Energy's $1.5bn UK tax bill lays bare North Sea fiscal squeeze
Harbour's UK tax payments surged 62% to $1.5bn in 2025, sharpening the stakes ahead of the Jackdaw and Rosebank approval decision.
Britain's pending decision on the Jackdaw and Rosebank fields has taken on sharper financial weight after the scale of the North Sea's existing tax burden became clear. Almost £11bn of private investment waits on that ruling, according to an oilprice.com analysis published on 4 September 2026, and the outcome will test whether the UK can credibly attract the next round of offshore capital.5
The tax data behind that backdrop is stark. North Sea operator Harbour Energy paid $1.5bn in UK income tax in 2025, a 62% increase on the $931m it paid in 2024, according to a payments-to-governments report released on Friday (2026-05-29). The company's global tax bill reached $3.76bn last year, with the UK contribution flowing entirely to HM Revenue and Customs after a modest $11m credit applied to its Southern North Sea operations.2
Norway tells a different story from the same company's accounts. Harbour paid just over $1.9bn in Norwegian income taxes last year, a 259% increase on the $529m it paid in Norway in 2024, alongside $6m in licence fees. The Norwegian take now exceeds the UK bill by roughly $400m on Harbour's books alone.2
That gap reflects two diverging fiscal approaches. Norway's petroleum tax system was designed to capture windfall profits while keeping investment flowing through generous deductions. The UK layered an Energy Profits Levy on top of its existing corporate tax and has repeatedly tightened that structure since it was introduced, most recently by closing arrangements that officials said allowed multinationals to reduce taxes on UK-generated profits.1
The rising tax take arrives as the basin faces its own structural pressures. BP has confirmed it hopes to sell its North Sea assets, putting five production hubs on the block: Andrew and ETAP in the central North Sea, plus Glen Lyon, Clair and Clair Ridge west of Shetland.3
Potential buyers face a hard calculation. The assets Eni picked up in its $4.9bn acquisition of Neptune Energy are already circulating in the sales pool, and Ithaca holds a 25% stake in Rosebank alongside its operated Greater Tornado area and the whole of Cambo. Any acquirer must model forward the same fiscal regime that produced Harbour's $1.5bn UK bill.3
Decommissioning liabilities compound that arithmetic. Current estimates suggest the combined impact of decommissioning tax relief and lost tax revenues could approach £13bn by 2035, a shadow over every barrel still flowing in the basin.5
Operators are trying to chip away at those costs. The North Sea Transition Authority announced that leading operators have backed its well decommissioning charter, with industry estimates suggesting that using vessels instead of rigs could lower the total bill for remaining subsea wellhead removals by roughly 30%, or about £200m ($271m).4
ICE Brent crude front-month was trading at $96.28/bbl as of 2026-09-07, down 1.06% on the session. At those levels the basin generates cash. The question is whether the tax regime leaves enough of it available to fund the next cycle of projects.
Harbour's rising payments cut both ways for the Treasury. Strong receipts validate the levy regime and give ministers fiscal room. But the same regime shapes the investment case for the £11bn waiting on Jackdaw and Rosebank approval, and for whatever buyer eventually steps up for BP's five hubs.5,3
The Norwegian comparison sits awkwardly for UK policymakers. Harbour paid more in Oslo than in London, yet Norway continues to attract steady investment into its shelf. Whether a higher UK take combined with an uncertain approval pipeline can sustain the same level of industry confidence is a question the Jackdaw and Rosebank decision will begin to answer.2
Approve both fields and the Treasury's tax receipts keep climbing through the decade. Delay or reject either and the £13bn decommissioning liability starts to look less like a footnote and more like the basin's defining financial fact for the years ahead.5