This section is about how to calculate the person's lost relievable amount for the purposes of sections 8FA(8) and 8FB(7).
For the purposes of this section and section 8FA(5), the value of the person's qualifying former residential interest is the value of the interest at the time of completion of the disposal of the interest.
In this section, the person's "former allowance" is the total of—
For the purposes of calculating any brought-forward allowance that the person ("P") would have had as mentioned in subsection (3)(b)—
For the purposes of subsection (3)(c), where the person's allowance on death is equal to the person's adjusted allowance, the amount of brought-forward allowance included in the person's allowance on death is calculated as follows.
Step 1 Express the person's brought-forward allowance as a percentage of the person's default allowance.
Step 2 Multiply— by the percentage given by step 1.
Step 3 Reduce the person's brought-forward allowance by the amount given by step 2. The result is the amount of brought-forward allowance included in the person's allowance on death.
If completion of the disposal of the qualifying former residential interest occurs before 6 April 2017—
In this section, the person's "allowance on death" means—
For the purposes of this section, "completion" of the disposal of a residential property interest occurs at the time of the disposal or, if the disposal is under a contract which is completed by a conveyance, at the time when the interest is conveyed.
Where, as a result of section 8FA, there is entitlement to a downsizing addition in calculating the person's residence nil-rate amount, take the following steps to calculate the person's lost relievable amount.
Step 1 Express the value of the person's qualifying former residential interest as a percentage of the person's former allowance, but take that percentage to be 100% if it would otherwise be higher.
Step 2 Express QRI as a percentage of the person's allowance on death, where QRI is so much of the value transferred by the transfer of value under section 4 on the person's death as is attributable to the person's qualifying residential interest, but take that percentage to be 100% if it would otherwise be higher.
Step 3 Subtract the percentage given by step 2 from the percentage given by step 1, but take the result to be 0% if it would otherwise be negative. The result is P%.
Step 4 The person's lost relievable amount is equal to P% of the person's allowance on death.
Where, as a result of section 8FB, there is entitlement to a downsizing addition in calculating the person's residence nil-rate amount, take the following steps to calculate the person's lost relievable amount.
Step 1 Express the value of the person's qualifying former residential interest as a percentage of the person's former allowance, but take that percentage to be 100% if it would otherwise be higher.
Step 2 Calculate that percentage of the person's allowance on death. The result is the person's lost relievable amount.