The new amounts of the fees apply to:
(a) any fee with a due date on or after 1 April 2020 and paid on or after that date
(b) any fee with a due date before 1 April 2020 for which the last day of the period for payment expires on or after 1 April 2020 and which is paid on or after that date
The fee amounts as in force until 31 March 2020 apply to:
(a) any fee with a due date on or after 1 April 2020 which are validly paid before that date (i.e. renewal fees and fee for grant and publishing)
(b) any fee with a due date before 1 April 2020 for which the last day of the period for payment expires on or after 1 April 2020, and which is paid before that date.
See <link https: www.epo.org law-practice legal-texts official-journal information-epo archive external-link-new-window internal link in current>Notice from the European Patent Office dated 30 March 2020 concerning the extension of periods for the payment of fees