Following the spike in energy prices in 2022, Britain imposed an energy profit levy (EPL) on oil and gas producers which raised the tax rate to 75%. 

Harbour Energy said its full-year profit before tax for 2023 totalled $597 million.

That was down from $2.5 billion in 2022 when net profit was only $8 million, due largely to the $1.5 billion set aside for the EPL. 

On Wednesday, Britain's finance minister Jeremy Hunt extended the EPL by another year to 2029.

The EPL also pushed Harbour Energy into a loss in the first half of 2023, leading it to cut its headcount in Britain, scale back North Sea spending, and seek to diversify its operations overseas.

(Reporting by Deep Vakil; Editing by Susan Fenton)