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The Corporation Tax Act 2010 (Part 8C) (Amendment) Regulations 2025

S.I. 2025/1253 · Made 1 December 2025

Original text. legislation.gov.uk does not revise statutory instruments, so later amendments are not shown here. Changes made to it are listed under each provision when known.

CORPORATION TAX

Approved by the House of Commons

Made at 1.50 p.m. on 1st December 2025

Laid before the House of Commons at 4.30 p.m. on 1st December 2025

Coming into force 15th January 2026

The Treasury make these Regulations in exercise of the power conferred by section 357YW(1) of the Corporation Tax Act 2010f1.

Annotations to the whole text

Footnotes

f1

2010 c. 4; section 357YW was inserted by section 38(3) of the Finance (No. 2) Act 2015 (c. 33).

Contents

  1. 1Citation and commencement
  2. 2Amendment of Part 8C of the Corporation Tax Act 2010
  3. 3Exclusion of simple interest
  4. 4Regulation 4
  5. 5Regulation 5
  6. 6Amendment of assessment time limit
  7. Signature
  8. Explanatory note

1Citation and commencement

These Regulations may be cited as the Corporation Tax Act 2010 (Part 8C) (Amendment) Regulations 2025 and come into force on 15th January 2026.

2Amendment of Part 8C of the Corporation Tax Act 2010

Part 8C of the Corporation Tax Act 2010f1 is amended in accordance with regulations 3 to 6.

3Exclusion of simple interest

In section 357YC (meaning of “restitution interest”)—

(a)

in subsection (4), after “simple interest at a” insert—

“rate equivalent to or lower than a”, and

(b)

in subsection (5), after “simple interest at a” insert—

“rate equivalent to or lower than a”.

4

In section 357YD (further provision about amounts included, or not included, in “restitution interest”)—

(a)

in subsection (1), in paragraph (b), after “simple interest at a” insert—

“rate equivalent to or lower than a”, and

(b)

in subsection (2), after “simple interest at a” insert—

“rate equivalent to or lower than a”.

5

In section 357YO (duty to deduct tax from payments of restitution interest), in subsection (4), after “simple interest at a” insert—

“rate equivalent to or lower than a”.

6Amendment of assessment time limit

In section 357YQ (assessment of tax chargeable on restitution interest), after subsection (1) insert—

“(1A)

An assessment under this section may be made at any time before the later of—

(a)

the end of the period of 2 years after the end of the accounting period in which Condition B in section 357YC is met, and

(b)

the end of any period within which the assessment may otherwise be made under any other provision of the Taxes Acts (within the meaning of section 118(1) of TMA 1970).”.

Signature

Gen Kitchen

Stephen Morgan

Two of the Lords Commissioners of His Majesty's Treasury

at 1.50 p.m. on 1st December 2025

Explanatory note

(This note is not part of the Regulations)

The Regulations amend Part 8C of the Corporation Tax Act 2010 (“CTA 2010”) which was inserted into the CTA 2010 by section 38(3) of Finance (No. 2) Act 2015. Part 8C applies a corporation tax rate of 45% to payments of restitution interest made by the Commissioners for His Majesty’s Revenue and Customs (“HMRC”).

Regulations 3 to 5 provide that Part 8C of the CTA 2010 does not apply to awards of simple interest that are at a rate equivalent to or lower than a statutory rate (which is defined by section 357YU(2) of the CTA 2010 as a rate equal to a rate specified for purposes relating to taxation in a provision in or made under an Act of Parliament).

Regulation 6 provides that an assessment of tax chargeable on restitution interest made under Part 8C of the CTA 2010 can be made at any time before the end of the period of 2 years after the end of the accounting period in which Condition B in section 357YC is met or the end of any period within which the assessment may otherwise be made under any other provision of the Taxes Acts, whichever is later. This provides that assessments can be made for adjustments made under sections 357YE and 357YH of the CTA 2010 where restitution interest is brought into account at a time before a court has made a final determination or before HMRC has entered into a final settlement to pay restitution interest.

A Tax Information and Impact Note covering this instrument will be published on the website at https://www.gov.uk/government/collections/tax-information-and-impact-notes-tiins.