# The Teachers' Superannuation (Additional Voluntary Contributions) Regulations 1989, Paragraph 9


(1) If the participator retires after having, before his 60th birthday, ceased to be in relevant employment, the permitted amount is the greater of (M+R) and
( N P ×Q)+R), where–
M is 1/60th of his final remuneration for each of up to 40 years of relevant employment,
N is the number of years on which M is calculated,
P is the number of years on which M would have been calculated if he had continued in relevant employment up to his 60th birthday,
Q is an amount calculated in accordance with paragraph 7 as at his 60th birthday, and
R is the appropriate increase.
(2) For the purposes of sub-paragraph (1) the appropriate increase is an increase in the amount in question, either–
(a) in proportion to any increase in the Index, or
(b) if greater, at 5 per cent compound,
from the cessation of relevant employment to the date on which the pension commenced.

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Source: https://www.legislation.gov.uk/uksi/1989/946/schedule/2/paragraph/9 (the official version)
Page: https://openlegislation.uk/teachers-superannuation-additional-voluntary-contributions-regulations-1989/schedule-2/paragraph-9
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.