IHTM36202 - Gravity: size of underpayment
The size of the underpayment may be either absolute or relative to the case.
In absolute terms, for example, an omission or undervaluation of say 拢100,000 is serious because of its magnitude. This would be so whether the total value of the estate is 拢200,000 or 拢2,000,000. All other facts being equal, the abatement for gravity would be the same in each case.
In relative terms, a lesser amount, say 拢10,000 for example, may also be serious, if it amounted to as much as a third or a half of the amount by which the declared chargeable estate exceeds the nil rate band.
Size should, therefore, be taken into account as a constituent of the abatement since it is a useful pointer to the gravity of the offence.