# The Nature Restoration Levy Regulations 2026, Regulation 24: Calculation of the levy amount


(1) The levy amount must be calculated in accordance with this regulation.
(2) A provisional amount is to be calculated by reference to—
(a) the rates or other criteria set out in the applicable charging schedule in force when the request to pay was accepted, and
(b) the details of the relevant development.
(3) The levy amount is nil where the provisional amount is less than £50.
(4) Otherwise, the levy amount is to be calculated by applying the following formula—
P × I L I C where—
“P” is the provisional amount;
“IL” is the index figure for the calendar year in which levy liability arose;
“IC” is the index figure for the calendar year in which the applicable charging schedule took effect.
(5) In this regulation—
(a) the details of the relevant development are as set out—
(i) for a relevant development authorised by planning permission, in the planning permission, or
(ii) for a relevant development authorised by a general consent, in the request to pay;
(b) the index figure for a given calendar year is—
(i) the figure in the RICS CIL Index published at 1st November of the preceding calendar year by the Building Cost Information Service on behalf of the Royal Institution of Chartered Surveyors, or
(ii) if the RICS CIL Index is not so published, the figure for the month of November for the preceding calendar year in the consumer prices index including owner occupiers’ housing costs (all items) published by the Office for National Statistics.

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Source: https://www.legislation.gov.uk/ukdsi/2026/9780348284379/regulation/24 (the official version)
Page: https://openlegislation.uk/draft-nature-restoration-levy-regulations-2026/regulation-24
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.