Nil Rate Band Escalation % - The UK inheritance tax threshold (the Nil Rate Band) is set at £325,000 until 2028, after which it will then increase in line with the Consumer Prices Index (CPI), per legislation.
In Voyant, the Nil Rate Band is set at £325,000 until 2028. The escalation rate for the Nil Rate Band from 2028 onwards is set based on the Nil Rate Band Escalation setting in Plan Settings. This escalation rate is set separately from CPI in order to give you greater flexibility.
Further reading
How to set custom preferences (plan settings) for your subscription