# The Non-Domestic Rating (Chargeable Amounts) (Wales) Regulations 2025, Regulation 4: Base liability


The BL for a defined hereditament is the chargeable amount for 31 March 2026 calculated in accordance with section 43 or 54 of the Act as appropriate, multiplied by 365.

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Source: https://www.legislation.gov.uk/wsi/2025/1371/regulation/4 (the official version)
Page: https://openlegislation.uk/non-domestic-rating-chargeable-amounts-wales-regulations-2025/regulation-4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.