Skip to content

ACCA Strategic Professional · Advanced Taxation (UK) · Statutory obligations, time limits and the implications of non-compliance

Mariana, an individual, underpaid income tax of £6,000 for a previous year and settles it exactly 6 months after the due date. Using the assumed interest rates in the ATX-UK tables (Finance Act 2025), what interest is chargeable on the underpaid tax?

Interest is £255. The assumed rate on underpaid tax is 8.5%, so £6,000 × 8.5% × 6/12 gives £255. Using the official rate of 3.75% or the overpaid rate of 3.5% would be wrong, and £510 ignores that only six months have passed.

  1. A£255Correct
  2. B£112.50
  3. C£105
  4. D£510

Explanation

Interest on underpaid tax is 8.50%. £6,000 × 8.5% × 6/12 = £255. £112.50 wrongly uses the official rate of 3.75%. £105 uses the overpaid rate of 3.5%. £510 is a full year's interest.

Did you get it right without looking?

One question tells you little. A timed set on Statutory obligations, time limits and the implications of non-compliance shows your real accuracy, how long you take and where you lose marks.

More Statutory obligations, time limits and the implications of non-compliance questions