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HMRC internal manual

Inheritance Tax Manual

Assessing: COMPASS: making amendments: new instalment option property (IOP) records

If one has not already been prepared, you can add a new IOP (IHTM31012) or instalment option property with interest relief (IOP(W)) assessment group from the ‘Estate Details’ window.

Select the ‘Add’ button in the assessment group options box and then select whether you require an IOP or IOP(W) group.

You can have more than one IOP or IOP(W) assessment group (but not NIOP) at each Entry. A second assessment group will be indentified on calculations by its separate number.


Ahmed’s free estate contains

  • personal assets of £125,000,
  • freehold property of £175,000
  • a half share in freehold property passing by survivorship at £100,000

As the tax on the joint property is payable by the receiving joint owner, and not by the executor, you have been asked to prepare separate calculations. You will assess

  • Entry A NIOP 1 (personal assets)
  • Entry A IOP 1 (freehold property passing under the Will)
  • Entry A IOP 2 (freehold property passing by survivorship)

The first calculation for IOP 1 will be numbered IOP 1/1, the next IOP1/2, the next IOP 1/3.

The first calculation for IOP 2 will be numbered IOP 2/1, the next IOP 2/2, the next IOP 2/3.