What must HMRC do when a participator earns an assessable profit from a taxable oil field?

When HMRC considers that a participator has earned an assessable profit from a taxable field during a chargeable period, they must make a formal assessment to petroleum revenue tax and send a notice of that assessment to the participator. The notice must show any allowable losses set against the profit and inform the participator of their right to appeal.

What is the time limit for HMRC to issue a petroleum revenue tax assessment under Schedule 2 paragraph 10?

HMRC must generally issue an assessment within 4 years after the end of the chargeable period to which it relates. However, extended time limits may apply in certain circumstances, such as where HMRC has made a formal enquiry or where there has been deliberate or careless conduct by the participator, or in connection with certain claims.

What happens if an allowable loss or nil result arises instead of a profit?

If HMRC considers that the participator has incurred an allowable loss from the taxable field for the chargeable period, they must make a formal determination confirming the loss is allowable and notify the participator. Similarly, if neither a profit nor a loss has arisen, HMRC must determine that a nil result has occurred and notify the participator with a right of appeal.

Can an assessment or determination be changed once it has been served on the participator?

Once a notice of assessment or determination has been served on the participator, it becomes fixed and cannot be altered except through the specific procedures laid down in the Oil Taxation Act 1975. Any corrections, amendments, or adjustments must follow the formal routes provided by the legislation, ensuring certainty and procedural integrity.

Oil Taxation Act 1975 Schedule 2 paragraph 10

Assessments to tax and determinations of loss, etc.

Paragraph 10 sets out the procedure by which HMRC assesses a participator to petroleum revenue tax on profits from an oil field, or determines that an allowable loss or nil result has arisen, and the rules governing those assessments and determinations.

Where an assessable profit arises from a taxable field for a chargeable period, HMRC must issue a formal assessment to tax and notify the participator.
Assessments must generally be made within 4 years of the end of the relevant chargeable period, though extended time limits apply in certain circumstances.
Where an allowable loss or a nil result arises, HMRC must make a formal determination to that effect and notify the participator, who has the right to appeal.
Once an assessment or determination notice has been served, it can only be changed in accordance with the specific provisions of the Oil Taxation Act 1975.

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