CAT can be paid in five equal yearly instalments, inclusive of interest, the first of which is due 12 months after the due date. The instalment option is not available in respect of property taken by way of limited interest (s 54).

Revenue may take court proceedings against a non-compliant person (s 63).


Interest is charged at 0.0219% for each day the tax remains unpaid (s 51).

Interest is payable on overpaid tax at 0.011% for each day or part of a day the tax is overpaid (s 57).


An understatement in the value of an asset may give rise to a surcharge (s 53) of:

  • 10% if the value declared was 50%-67% of the true value,
  • 20% if the value declared was 40%-50% of the true value,
  • 30% if the value declared was less than 40% of the true value.