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HMRC internal manual

Inheritance Tax Manual

Calculating the RNRB: Terms used: Residential enhancement

The maximum available amount of the RNRB (excluding any transferred amounts (IHTM46040) for deaths in the following tax years will be:

  • £100,000 in 2017 – 2018
  • £125,000 in 2018 – 2019
  • £150,000 in 2019 – 2020
  • £175,000 in 2020 – 2021

These values are referred to in the legislation as the ‘residential enhancement’. After the tax year 2020/2021 these values will automatically increase each year by reference to the Consumer Prices Index (CPI), unless the Treasury specifies an alternative value – IHTA84/S8D(6, 7 & 8).