Circular Letter No. CC/2023/00000041

Circular Letter No. CC/2023/00000041 Sent to: Credit Institutions. Mod. 40000375/T – 01/14 This Circular Letter serves to inform institutions subject to minimum reserves in Portugal about the notification deadlines for the minimum reserve amounts to be complied with by each institution during the minimum reserve maintenance periods for the year 2024 (Table 1 for monthly reporting and Table 2 for quarterly reporting), in accordance with Article 7(6) of the Regulation of 22 January 2021 on the application of the European Central Bank (ECB/2021/1) minimum reserve regime. Additionally, institutions are informed of the calendar dates for the minimum reserve maintenance periods for the year 2024 (Table 3), in accordance with Article 8(2) of the aforementioned Regulation, and of the change in the end date of the maintenance period that will begin on 20 December 2023 (Table 4). These calendars were published by the European Central Bank in its communications of 15 September 2023. Banco de Portugal publishes the notification dates and the calendars for the minimum reserve maintenance periods on its institutional website (https://www.bportugal.pt/page/instrumentos-pol-mon). The Markets Department is available to provide any additional clarifications. Table 1 – Minimum reserve notification dates for 2024 (monthly reporting) Incidence Base (monthly reporting) Start of Maintenance Period Notification Date Acceptance Date of Notification November 2023 31 January 2024 26 January 2024 30 January 2024 January 2024 13 March 2024 8 March 2024 12 March 2024 February 2024 17 April 2024 12 April 2024 16 April 2024 April 2024 12 June 2024 7 June 2024 11 June 2024 May 2024 24 July 2024 19 July 2024 23 July 2024 July 2024 18 September 2024 13 September 2024 17 September 2024 August 2024 23 October 2024 18 October 2024 22 October 2024 October 2024 18 December 2024 13 December 2024 17 December 2024

Mod. 40000375/T – 01/14 Table 2 – Minimum reserve notification dates for 2024 (quarterly reporting) Table 3 – Calendar of minimum reserve maintenance periods for 2024 Table 4 – Calendar of minimum reserve maintenance periods for 2023 Incidence Base (quarterly reporting) Start of Maintenance Period Notification Date Acceptance Date of Notification September 2023 31 January 2024 15 December 2023 19 December 2023 December 2023 13 March 2024 8 March 2024 12 March 2024 December 2023 17 April 2024 8 March 2024 12 March 2024 March 2024 12 June 2024 7 June 2024 11 June 2024 March 2024 24 July 2024 7 June 2024 11 June 2024 June 2024 18 September 2024 13 September 2024 17 September 2024 June 2024 23 October 2024 13 September 2024 17 September 2024 September 2023 18 December 2024 13 December 2024 17 December 2024 ECB Council Meeting Start of maintenance period End of maintenance period Incidence base for credit institutions that submit declarations monthly Incidence base for credit institutions that submit declarations quarterly Duration of maintenance period days 25 January 2024 31 January 2024 12 March 2024 November 2023 September 2023 42 7 March 2024 13 March 2024 16 April 2024 January 2024 December 2023 35 11 April 2024 17 April 2024 11 June 2024 February 2024 December 2023 56 6 June 2024 12 June 2024 23 July 2024 April 2024 March 2024 42 18 July 2024 24 July 2024 17 September 2024 May 2024 March 2024 56 12 September 2024 18 September 2024 22 October 2024 July 2024 June 2024 35 17 October 2024 23 October 2024 17 December 2024 August 2024 June 2024 56 12 December 2024 18 December 2024 to be confirmed October 2024 September 2023 to be confirmed ECB Council Meeting Start of maintenance period End of maintenance period Incidence base for credit institutions that submit declarations monthly Incidence base for credit institutions that submit declarations quarterly Duration of maintenance period days 2 February 2023 8 February 2023 21 March 2023 December 2022 September 2022 42 16 March 2023 22 March 2023 9 May 2023 January 2023 December 2022 49 4 May 2023 10 May 2023 20 June 2023 March 2023 December 2022 42 15 June 2023 21 June 2023 1 August 2023 April 2023 March 2023 42 27 July 2023 2 August 2023 19 September 2023 June 2023 March 2023 49 14 September 2023 20 September 2023 31 October 2023 July 2023 June 2023 42 26 October 2023 1 November 2023 19 December 2023 September 2023 June 2023 49 14 December 2023 20 December 2023 30 January 2024 October 2023 September 2023 42