Tribunal rules for Ghana in Tullow tax dispute, upholding US$393 million GRA assessment

Pinned summary · as of 16:14

An international arbitration panel has sided with Ghana in its tax fight with Tullow Ghana Limited, rejecting every claim the oil company brought over how insurance money it received for business interruption was taxed. The Ministry of Finance says the demand of US$393,091,993.70 raised by the Ghana Revenue Authority (GRA) survives intact. Tullow has said it is disappointed by the outcome.

What we know

• A tribunal operating under the arbitration rules of the International Chamber of Commerce ruled in Ghana's favour and dismissed all of Tullow Ghana Limited's claims. At issue was how money paid out to Tullow by its business interruption insurance cover should be taxed.
• The tribunal handed down its award on 29 September 2026, and Finance Minister Dr Cassiel Ato Forson made the result public on Wednesday, 30 September.
• Per the Finance Ministry, the GRA's US$393,091,993.70 demand on Tullow was endorsed entirely.
• The tribunal is reported to have concluded that the tax demand does not violate the Petroleum Agreements Tullow holds with Ghana.
• The government says the tribunal also held that the assessment was filed within the allowed time and that the GRA acted lawfully when it moved to enforce it.
• The penalty was treated differently from the contractual protections: reports say the tribunal ruled that the 100% penalty lies outside the shelter those agreements give Tullow, and the government says the GRA applied it properly.
• Dr Forson said the result backs Ghana's long-held position that no company working in the country, whatever its size, is above Ghanaian law.
• The government said it will carry out the award under Ghanaian law in a way that secures the money owed to the state while keeping Tullow able to operate and invest. It added that talks with the company will continue, covering both this ruling and a separate proceeding over disallowed loan interest.
• The government also pointed out that Ghanaian law lets the GRA decide when and how an assessed tax bill is paid.
• The Ghana Revenue Authority welcomed the outcome, saying it shows that tax law is applied evenly to every taxpayer.
• Tullow Oil said it will consider its next steps after further talks with the Government of Ghana and will update the market in due course. In its words, “Tullow is disappointed that the Tribunal has come to this decision”.

What's disputed / unconfirmed

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  Reports differ on the size of the underlying assessment. Citi Newsroom and MyJoyOnline put the corporate income tax assessment ruled on at US$196.5 million, and NorvanReports said that figure plus a 100% penalty comes to about US$393.1 million. Other reports give only the larger US$393 million total.
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  Opemsuo 104.7 said the award was delivered on Monday and announced on Tuesday, which does not match the 29 September and 30 September dates given elsewhere.
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  Onua Online said the dispute concerned tax treatment of more than US$1 billion that Tullow received as insurance after technical problems on the Jubilee field; no other report gives that amount.
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  MyJoyOnline described a nearly US$400 million charge covering loan interest deductions as well as insurance issues, while other reports treat the loan-interest matter as a separate proceeding that is still unresolved.
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  Graphic Online reported that the GRA issued the insurance-related assessment in December 2022 and that Tullow took it to arbitration in London in February 2023, and that Tullow put the two disputed assessments together at US$387 million plus penalties; no other report confirms these details.

Why it matters for Ghana

Tullow is Ghana's largest petroleum producer, and the government says its Jubilee and TEN operations support gas supply for power, energy security and thousands of jobs. How and when the money is collected will therefore matter to the public purse and to the oil fields the country relies on. The remaining loan-interest dispute means the wider tax relationship between the state and the company is still being negotiated.