Other issues: excepted estates and transferable nil rate band
For deaths before 6 April 2010 the limit for excepted estates was the single Inheritance Tax (IHT) nil rate band available to every individual, irrespective of whether or not there was any unused nil rate band to transfer. For deaths on or after this date the limit is increased to double the IHT nil rate band if transferable nil rate band (TNRB) can be claimed and other conditions are met. You can find details of these conditions at IHTM06024.
If TNRB is not initially claimed, and the value of an estate returned as an excepted estate changes, it may still be possible to claim TNRB. The process the personal representatives must follow will depend on whether the estate still qualifies as an excepted estate or not – see IHTM06034.