2026-03-27 | Circular No. 1 of 2026The Central Bank of Sri Lanka issues these operating instructions to define the reserve maintenance schedule and reporting obligations for banks in 2026. Schedule A provides a detailed calendar mapping base periods, reserve calculation dates, and reserve maintenance periods throughout the year. Schedules B and C specify the required forms for reporting daily average deposit liabilities and calculating the corresponding reserve requirements in Sri Lanka Rupees.
4 SCHEDULE A RESERVE MAINTENANCE PERIOD CALENDAR - 2026 Base Period Base Period No. Reserve Calculation Period Reserve Maintenance Period* RMP No. RMP Date Day Date Day Base period (Calculation period) -1 04/03/26 Wednesday 01/04/26 Wednesday 1 Maintenance period 05/03/26 Thursday 02/04/26 Thursday 06/03/26 Friday 03/04/26 Friday 07/03/26 Saturday 04/04/26 Saturday 08/03/26 Sunday 05/04/26 Sunday 09/03/26 Monday 06/04/26 Monday 10/03/26 Tuesday 07/04/26 Tuesday 11/03/26 Wednesday 08/04/26 Wednesday 12/03/26 Thursday 09/04/26 Thursday 13/03/26 Friday 10/04/26 Friday 14/03/26 Saturday 11/04/26 Saturday 15/03/26 Sunday 12/04/26 Sunday 16/03/26 Monday 13/04/26 Monday 17/03/26 Tuesday 14/04/26 Tuesday Base period (Calculation period) 0 18/03/26 Wednesday 15/04/26 Wednesday 2 Maintenance period 19/03/26 Thursday 16/04/26 Thursday 20/03/26 Friday 17/04/26 Friday 21/03/26 Saturday 18/04/26 Saturday 22/03/26 Sunday 19/04/26 Sunday 23/03/26 Monday 20/04/26 Monday 24/03/26 Tuesday 21/04/26 Tuesday 25/03/26 Wednesday 22/04/26 Wednesday 26/03/26 Thursday 23/04/26 Thursday 27/03/26 Friday 24/04/26 Friday 28/03/26 Saturday 25/04/26 Saturday 29/03/26 Sunday 26/04/26 Sunday 30/03/26 Monday 27/04/26 Monday 31/03/26 Tuesday 28/04/26 Tuesday *The Reserve Maintenance Period (RMP), along with the corresponding base period, is presented using sequence numbering and colour codes for ease of reference.
5 Base Period Base Period No. Reserve Calculation Period Reserve Maintenance Period* RMP No. RMP Date Day Date Day Base period (Calculation period) 1 01/04/26 Wednesday 29/04/26 Wednesday 3 Maintenance period 02/04/26 Thursday 30/04/26 Thursday 03/04/26 Friday 01/05/26 Friday 04/04/26 Saturday 02/05/26 Saturday 05/04/26 Sunday 03/05/26 Sunday 06/04/26 Monday 04/05/26 Monday 07/04/26 Tuesday 05/05/26 Tuesday 08/04/26 Wednesday 06/05/26 Wednesday 09/04/26 Thursday 07/05/26 Thursday 10/04/26 Friday 08/05/26 Friday 11/04/26 Saturday 09/05/26 Saturday 12/04/26 Sunday 10/05/26 Sunday 13/04/26 Monday 11/05/26 Monday 14/04/26 Tuesday 12/05/26 Tuesday Base period (Calculation period) 2 15/04/26 Wednesday 13/05/26 Wednesday 4 Maintenance period 16/04/26 Thursday 14/05/26 Thursday 17/04/26 Friday 15/05/26 Friday 18/04/26 Saturday 16/05/26 Saturday 19/04/26 Sunday 17/05/26 Sunday 20/04/26 Monday 18/05/26 Monday 21/04/26 Tuesday 19/05/26 Tuesday 22/04/26 Wednesday 20/05/26 Wednesday 23/04/26 Thursday 21/05/26 Thursday 24/04/26 Friday 22/05/26 Friday 25/04/26 Saturday 23/05/26 Saturday 26/04/26 Sunday 24/05/26 Sunday 27/04/26 Monday 25/05/26 Monday 28/04/26 Tuesday 26/05/26 Tuesday *The Reserve Maintenance Period (RMP), along with the corresponding base period, is presented using sequence numbering and colour codes for ease of reference.
6 Base Period Base Period No. Reserve Calculation Period Reserve Maintenance Period* RMP No. RMP Date Day Date Day Base period (Calculation period) 3 29/04/26 Wednesday 27/05/26 Wednesday 5 Maintenance period 30/04/26 Thursday 28/05/26 Thursday 01/05/26 Friday 29/05/26 Friday 02/05/26 Saturday 30/05/26 Saturday 03/05/26 Sunday 31/05/26 Sunday 04/05/26 Monday 01/06/26 Monday 05/05/26 Tuesday 02/06/26 Tuesday 06/05/26 Wednesday 03/06/26 Wednesday 07/05/26 Thursday 04/06/26 Thursday 08/05/26 Friday 05/06/26 Friday 09/05/26 Saturday 06/06/26 Saturday 10/05/26 Sunday 07/06/26 Sunday 11/05/26 Monday 08/06/26 Monday 12/05/26 Tuesday 09/06/26 Tuesday Base period (Calculation period) 4 13/05/26 Wednesday 10/06/26 Wednesday 6 Maintenance period 14/05/26 Thursday 11/06/26 Thursday 15/05/26 Friday 12/06/26 Friday 16/05/26 Saturday 13/06/26 Saturday 17/05/26 Sunday 14/06/26 Sunday 18/05/26 Monday 15/06/26 Monday 19/05/26 Tuesday 16/06/26 Tuesday 20/05/26 Wednesday 17/06/26 Wednesday 21/05/26 Thursday 18/06/26 Thursday 22/05/26 Friday 19/06/26 Friday 23/05/26 Saturday 20/06/26 Saturday 24/05/26 Sunday 21/06/26 Sunday 25/05/26 Monday 22/06/26 Monday 26/05/26 Tuesday 23/06/26 Tuesday *The Reserve Maintenance Period (RMP), along with the corresponding base period, is presented using sequence numbering and colour codes for ease of reference.
7 Base Period Base Period No. Reserve Calculation Period Reserve Maintenance Period* RMP No. RMP Date Day Date Day Base period (Calculation period) 5 27/05/26 Wednesday 24/06/26 Wednesday 7 Maintenance period 28/05/26 Thursday 25/06/26 Thursday 29/05/26 Friday 26/06/26 Friday 30/05/26 Saturday 27/06/26 Saturday 31/05/26 Sunday 28/06/26 Sunday 01/06/26 Monday 29/06/26 Monday 02/06/26 Tuesday 30/06/26 Tuesday 03/06/26 Wednesday 01/07/26 Wednesday 04/06/26 Thursday 02/07/26 Thursday 05/06/26 Friday 03/07/26 Friday 06/06/26 Saturday 04/07/26 Saturday 07/06/26 Sunday 05/07/26 Sunday 08/06/26 Monday 06/07/26 Monday 09/06/26 Tuesday 07/07/26 Tuesday Base period (Calculation period) 6 10/06/26 Wednesday 08/07/26 Wednesday 8 Maintenance period 11/06/26 Thursday 09/07/26 Thursday 12/06/26 Friday 10/07/26 Friday 13/06/26 Saturday 11/07/26 Saturday 14/06/26 Sunday 12/07/26 Sunday 15/06/26 Monday 13/07/26 Monday 16/06/26 Tuesday 14/07/26 Tuesday 17/06/26 Wednesday 15/07/26 Wednesday 18/06/26 Thursday 16/07/26 Thursday 19/06/26 Friday 17/07/26 Friday 20/06/26 Saturday 18/07/26 Saturday 21/06/26 Sunday 19/07/26 Sunday 22/06/26 Monday 20/07/26 Monday 23/06/26 Tuesday 21/07/26 Tuesday *The Reserve Maintenance Period (RMP), along with the corresponding base period, is presented using sequence numbering and colour codes for ease of reference.
8 Base Period Base Period No. Reserve Calculation Period Reserve Maintenance Period* RMP No. RMP Date Day Date Day Base period (Calculation period) 7 24/06/26 Wednesday 22/07/26 Wednesday 9 Maintenance period 25/06/26 Thursday 23/07/26 Thursday 26/06/26 Friday 24/07/26 Friday 27/06/26 Saturday 25/07/26 Saturday 28/06/26 Sunday 26/07/26 Sunday 29/06/26 Monday 27/07/26 Monday 30/06/26 Tuesday 28/07/26 Tuesday 01/07/26 Wednesday 29/07/26 Wednesday 02/07/26 Thursday 30/07/26 Thursday 03/07/26 Friday 31/07/26 Friday 04/07/26 Saturday 01/08/26 Saturday 05/07/26 Sunday 02/08/26 Sunday 06/07/26 Monday 03/08/26 Monday 07/07/26 Tuesday 04/08/26 Tuesday Base period (Calculation period) 8 08/07/26 Wednesday 05/08/26 Wednesday 10 Maintenance period 09/07/26 Thursday 06/08/26 Thursday 10/07/26 Friday 07/08/26 Friday 11/07/26 Saturday 08/08/26 Saturday 12/07/26 Sunday 09/08/26 Sunday 13/07/26 Monday 10/08/26 Monday 14/07/26 Tuesday 11/08/26 Tuesday 15/07/26 Wednesday 12/08/26 Wednesday 16/07/26 Thursday 13/08/26 Thursday 17/07/26 Friday 14/08/26 Friday 18/07/26 Saturday 15/08/26 Saturday 19/07/26 Sunday 16/08/26 Sunday 20/07/26 Monday 17/08/26 Monday 21/07/26 Tuesday 18/08/26 Tuesday *The Reserve Maintenance Period (RMP), along with the corresponding base period, is presented using sequence numbering and colour codes for ease of reference.
9 Base Period Base Period No. Reserve Calculation Period Reserve Maintenance Period* RMP No. RMP Date Day Date Day Base period (Calculation period) 9 22/07/26 Wednesday 19/08/26 Wednesday 11 Maintenance period 23/07/26 Thursday 20/08/26 Thursday 24/07/26 Friday 21/08/26 Friday 25/07/26 Saturday 22/08/26 Saturday 26/07/26 Sunday 23/08/26 Sunday 27/07/26 Monday 24/08/26 Monday 28/07/26 Tuesday 25/08/26 Tuesday 29/07/26 Wednesday 26/08/26 Wednesday 30/07/26 Thursday 27/08/26 Thursday 31/07/26 Friday 28/08/26 Friday 01/08/26 Saturday 29/08/26 Saturday 02/08/26 Sunday 30/08/26 Sunday 03/08/26 Monday 31/08/26 Monday 04/08/26 Tuesday 01/09/26 Tuesday Base period (Calculation period) 10 05/08/26 Wednesday 02/09/26 Wednesday 12 Maintenance period 06/08/26 Thursday 03/09/26 Thursday 07/08/26 Friday 04/09/26 Friday 08/08/26 Saturday 05/09/26 Saturday 09/08/26 Sunday 06/09/26 Sunday 10/08/26 Monday 07/09/26 Monday 11/08/26 Tuesday 08/09/26 Tuesday 12/08/26 Wednesday 09/09/26 Wednesday 13/08/26 Thursday 10/09/26 Thursday 14/08/26 Friday 11/09/26 Friday 15/08/26 Saturday 12/09/26 Saturday 16/08/26 Sunday 13/09/26 Sunday 17/08/26 Monday 14/09/26 Monday 18/08/26 Tuesday 15/09/26 Tuesday *The Reserve Maintenance Period (RMP), along with the corresponding base period, is presented using sequence numbering and colour codes for ease of reference.
10 Base Period Base Period No. Reserve Calculation Period Reserve Maintenance Period* RMP No. RMP Date Day Date Day Base period (Calculation period) 11 19/08/26 Wednesday 16/09/26 Wednesday 13 Maintenance period 20/08/26 Thursday 17/09/26 Thursday 21/08/26 Friday 18/09/26 Friday 22/08/26 Saturday 19/09/26 Saturday 23/08/26 Sunday 20/09/26 Sunday 24/08/26 Monday 21/09/26 Monday 25/08/26 Tuesday 22/09/26 Tuesday 26/08/26 Wednesday 23/09/26 Wednesday 27/08/26 Thursday 24/09/26 Thursday 28/08/26 Friday 25/09/26 Friday 29/08/26 Saturday 26/09/26 Saturday 30/08/26 Sunday 27/09/26 Sunday 31/08/26 Monday 28/09/26 Monday 01/09/26 Tuesday 29/09/26 Tuesday Base period (Calculation period) 12 02/09/26 Wednesday 30/09/26 Wednesday 14 Maintenance period 03/09/26 Thursday 01/10/26 Thursday 04/09/26 Friday 02/10/26 Friday 05/09/26 Saturday 03/10/26 Saturday 06/09/26 Sunday 04/10/26 Sunday 07/09/26 Monday 05/10/26 Monday 08/09/26 Tuesday 06/10/26 Tuesday 09/09/26 Wednesday 07/10/26 Wednesday 10/09/26 Thursday 08/10/26 Thursday 11/09/26 Friday 09/10/26 Friday 12/09/26 Saturday 10/10/26 Saturday 13/09/26 Sunday 11/10/26 Sunday 14/09/26 Monday 12/10/26 Monday 15/09/26 Tuesday 13/10/26 Tuesday *The Reserve Maintenance Period (RMP), along with the corresponding base period, is presented using sequence numbering and colour codes for ease of reference.
11 Base Period Base Period No. Reserve Calculation Period Reserve Maintenance Period* RMP No. RMP Date Day Date Day Base period (Calculation period) 13 16/09/26 Wednesday 14/10/26 Wednesday 15 Maintenance period 17/09/26 Thursday 15/10/26 Thursday 18/09/26 Friday 16/10/26 Friday 19/09/26 Saturday 17/10/26 Saturday 20/09/26 Sunday 18/10/26 Sunday 21/09/26 Monday 19/10/26 Monday 22/09/26 Tuesday 20/10/26 Tuesday 23/09/26 Wednesday 21/10/26 Wednesday 24/09/26 Thursday 22/10/26 Thursday 25/09/26 Friday 23/10/26 Friday 26/09/26 Saturday 24/10/26 Saturday 27/09/26 Sunday 25/10/26 Sunday 28/09/26 Monday 26/10/26 Monday 29/09/26 Tuesday 27/10/26 Tuesday Base period (Calculation period) 14 30/09/26 Wednesday 28/10/26 Wednesday 16 Maintenance period 01/10/26 Thursday 29/10/26 Thursday 02/10/26 Friday 30/10/26 Friday 03/10/26 Saturday 31/10/26 Saturday 04/10/26 Sunday 01/11/26 Sunday 05/10/26 Monday 02/11/26 Monday 06/10/26 Tuesday 03/11/26 Tuesday 07/10/26 Wednesday 04/11/26 Wednesday 08/10/26 Thursday 05/11/26 Thursday 09/10/26 Friday 06/11/26 Friday 10/10/26 Saturday 07/11/26 Saturday 11/10/26 Sunday 08/11/26 Sunday 12/10/26 Monday 09/11/26 Monday 13/10/26 Tuesday 10/11/26 Tuesday *The Reserve Maintenance Period (RMP), along with the corresponding base period, is presented using sequence numbering and colour codes for ease of reference.
12 Base Period Base Period No. Reserve Calculation Period Reserve Maintenance Period* RMP No. RMP Date Day Date Day Base period (Calculation period) 15 14/10/26 Wednesday 11/11/26 Wednesday 17 Maintenance period 15/10/26 Thursday 12/11/26 Thursday 16/10/26 Friday 13/11/26 Friday 17/10/26 Saturday 14/11/26 Saturday 18/10/26 Sunday 15/11/26 Sunday 19/10/26 Monday 16/11/26 Monday 20/10/26 Tuesday 17/11/26 Tuesday 21/10/26 Wednesday 18/11/26 Wednesday 22/10/26 Thursday 19/11/26 Thursday 23/10/26 Friday 20/11/26 Friday 24/10/26 Saturday 21/11/26 Saturday 25/10/26 Sunday 22/11/26 Sunday 26/10/26 Monday 23/11/26 Monday 27/10/26 Tuesday 24/11/26 Tuesday Base period (Calculation period) 16 28/10/26 Wednesday 25/11/26 Wednesday 18 Maintenance period 29/10/26 Thursday 26/11/26 Thursday 30/10/26 Friday 27/11/26 Friday 31/10/26 Saturday 28/11/26 Saturday 01/11/26 Sunday 29/11/26 Sunday 02/11/26 Monday 30/11/26 Monday 03/11/26 Tuesday 01/12/26 Tuesday 04/11/26 Wednesday 02/12/26 Wednesday 05/11/26 Thursday 03/12/26 Thursday 06/11/26 Friday 04/12/26 Friday 07/11/26 Saturday 05/12/26 Saturday 08/11/26 Sunday 06/12/26 Sunday 09/11/26 Monday 07/12/26 Monday 10/11/26 Tuesday 08/12/26 Tuesday *The Reserve Maintenance Period (RMP), along with the corresponding base period, is presented using sequence numbering and colour codes for ease of reference.
13 Base Period Base Period No. Reserve Calculation Period Reserve Maintenance Period* RMP No. RMP Date Day Date Day Base period (Calculation period) 17 11/11/26 Wednesday 09/12/26 Wednesday 19 Maintenance period 12/11/26 Thursday 10/12/26 Thursday 13/11/26 Friday 11/12/26 Friday 14/11/26 Saturday 12/12/26 Saturday 15/11/26 Sunday 13/12/26 Sunday 16/11/26 Monday 14/12/26 Monday 17/11/26 Tuesday 15/12/26 Tuesday 18/11/26 Wednesday 16/12/26 Wednesday 19/11/26 Thursday 17/12/26 Thursday 20/11/26 Friday 18/12/26 Friday 21/11/26 Saturday 19/12/26 Saturday 22/11/26 Sunday 20/12/26 Sunday 23/11/26 Monday 21/12/26 Monday 24/11/26 Tuesday 22/12/26 Tuesday Base period (Calculation period) 18 25/11/26 Wednesday 23/12/26 Wednesday 20 Maintenance period 26/11/26 Thursday 24/12/26 Thursday 27/11/26 Friday 25/12/26 Friday 28/11/26 Saturday 26/12/26 Saturday 29/11/26 Sunday 27/12/26 Sunday 30/11/26 Monday 28/12/26 Monday 01/12/26 Tuesday 29/12/26 Tuesday 02/12/26 Wednesday 30/12/26 Wednesday 03/12/26 Thursday 31/12/26 Thursday 04/12/26 Friday 01/01/27 Friday 05/12/26 Saturday 02/01/27 Saturday 06/12/26 Sunday 03/01/27 Sunday 07/12/26 Monday 04/01/27 Monday 08/12/26 Tuesday 05/01/27 Tuesday *The Reserve Maintenance Period (RMP), along with the corresponding base period, is presented using sequence numbering and colour codes for ease of reference.
14 SCHEDULE B FORM OF REPORT REPORT OF DAILY AVERAGE DEPOSIT LIABILITIES Name of the Bank: ……………………………………………………………… For the period from (…………………………) to (…………………………..) Date Date The average amounts of deposit liabilities reported below are based on the deposit balances shown by the books of the Banks at the close of business of each day of the period specified above. (i) Demand Deposits (ii) Time and Savings Deposits (iii) All other Deposit Liabilities1 Total (i)+(ii)+(iii) 1 In the case of Certificate of Deposit the amount declared should be the paid-up value. REQUIRED RESERVES For the period commencing …………………………………………….. Item In Sri Lanka Rupees
15 over and above 2% of average deposit liabilities covered in (1), but not exceeding 2.5% 3. Total reserves required to be maintained over the reserve maintenance period (1-2) We/I hereby certify that the above figures are correct and in accordance with the book of this bank and that the figures shown above are in accordance with the Rules issued by the Central Bank of Sri Lanka for the purpose. ………………… ……………………………. Entering Officer Authorised Officer (Name & Designation) (Name & Designation)
16 SCHEDULE C FORM OF REPORT REPORT OF DAILY AVERAGE DEPOSIT LIABILITIES Name of the Bank: ……………………………………………………………… For the period from (…………………………) to (…………………………..) Date Date The average amounts of deposit liabilities reported below are based on the deposit balances shown by the books of the Banks at the close of business of each day of the period specified above. (i) Demand Deposits (ii) Time and Savings Deposits (iii) All other Deposit Liabilities1 Total (i)+(ii)+(iii) 1 In the case of Certificate of Deposits the amount declared should be the paid-up value. REQUIRED RESERVES For the period commencing …………………………………………….. Item In Sri Lanka Rupees
17 We/I hereby certify that the above figures are correct and in accordance with the book of this bank and that the figures shown above are in accordance with the Rules issued by the Central Bank of Sri Lanka for the purpose. ………………… ……………………………. Entering Officer Authorised Officer (Name & Designation) (Name & Designation)