Settlement calendars

AEMO prepares a settlement calendar for each of the markets being settled, showing the dates for delivery of statements and settlement of trading amounts relating to each billing period.

To assist participants in fulfilling their settlement obligations, AEMO has prepared a suite of calendars that utilise a common layout, and also calendars that span across markets (e.g. final statement and payment dates for all markets). The table below presents each of the calendars, based on the market(s) they cover and the layout of the calendar.

The calendars are based on the public holiday dates determined by the State Government proclamations. State governments may, from time to time, proclaim additional holidays at short notice. AEMO reserves the right to modify these calendars if necessary to comply with the relevant market rules and provides these calendars subject to this disclaimer.

The Shortening the Settlement Cycle (SSC) go-live date begins from billing week 33, 9 August 2026.

In accordance with the AEMC's final rule for SSC, the 2026 settlement calendar includes SSC transition period for 10 weeks (9 August 2026 to 18 October 2026) leading to full implementation from billing week 43, 18 October 2026.

Please note that the R0 statement dates in the NEM Settlement Calendar will only be reflected in the NEM MMS data model 5.7 closer to the SSC implementation date on 9th August 2026. Further communications will be sent out closer to this date.

Market Planning Calendars (including Data Provision)

Weekly Planner

Monthly Planner

Yearly Planner

Clearing Calendars

For further information on these documents please contact AEMO's Information and Support Hub.