Upcoming Changes

Increased Reserve Requirements

1.8.2026 00:00 to 12.31.2026 00:00

Due to the non-performance of committed Synchronized Reserve resources during Synchronized Reserve Events since the implementation of Reserve Price Formation (October 1, 2022) and to maintain compliance with NERC Standards, effective from May 19, 2023, PJM carried an additional 30% on the Reliability requirement component of Synchronized and Primary reserve in the RTO only in the Day-Ahead, and Real-time Markets for all hours. Effective January 9, 2026 instead of 30% PJM will carry an additional 20% on the Reliability requirement component of Synchronized and Primary reserve in the RTO only in the Day-Ahead, and Real-time Markets for all hours until further notice.

For example (rounded to whole MW): If the largest single contingency = 1,630 MW

Default (100% of largest contingency)

Synchronized Reserve requirement: 1,630*1 + 190 = 1,820 MW

Primary Reserve requirement: 1,630*1.5 + 190 = 2,635 MW

30-Minute Reserve requirement: Max(3,000, gas contingency, PR reliability) + 190 = 3,190 MW

Increased reliability by 20%

Synchronized Reserve requirement: 1,630*1.2 + 190 = 2,146 MW

Primary Reserve requirement: 1,630*1.2*1.5 + 190 = 3,124 MW

30-Minute Reserve requirement: Max(3,000, gas contingency, PR reliability) + 190 = 3000 + 190 = 3,190 MW

If you have any questions regarding this message, please contact PJM Customer Service at (866) 400-8980 or send an email to custsvc@pjm.com. Thank you.

Hudson Scheduling Restriction (NY outage)

9.24.2026 15:45 to 1.6.2027 00:00

The Hudson path is restricted to 300MW from Sep 24, 2026 15:45 until Jan 6, 2027 00:00 due to NY outage.

Please reference the NY system for the outage ticket in the event of updates done after this posting.

Formula Rate Data Submission Reminder: Nov 2026

10.7.2026 00:00 to 12.31.2026 23:59

As year-end approaches, some TOs will be submitting formula rate filings for January 2027 - December 2027. Please enter your January 2027 - December 2027 Formula Rate Data into TC Planner by November 14, 2026. Timely submission is important for TC Planner to function well.

Application background, required actions, and available resources are provided below.

Background:

On April 11, 2024 at 3 p.m. EPT PJM launched a new tool, TC Planner tool. Transmission Cost Planner (TC Planner) replaced the previous Transmission Cost Information Center (TCIC). It helps PJM stakeholders in understanding current transmission costs and estimating future transmission costs.

Actions Requested:

1.Access Request: To add formula rate data into TC Planner for your company, write access is needed.

1) An existing account in the PJM Account Manager will automatically grant users read-only access to the TC Planner. No additional access requests are required beyond having a valid Account Manager account.

2) To request write access or to set up a new PJM account, please visit tcplanner-take-a-tour

2.Add both planning and settlement formula rate data (January 2027 - December 2027) into TC Planner for your company by November 14, 2026

Materials & Support:

1.We have available materials, including the User Guide, a Training Demo and Take A Tour document for TC Planner. Those materials show how to submit access request and add formula rate data into TC Planner.

2.Please contact TC Planner support for any questions or concerns.

Temporary Changes to the Synchronized Reserve Requirements

10.26.2026 08:00 to 10.29.2026 16:00

PJM may carry additional Reserve MW effective hour ending 9 of October 26, 2026 through hour ending 16 of October 29, 2026 due to a temporary switching condition on the system. Reserve requirements being cleared in Real-Time can be viewed under the Dispatched Reserves screen in Data Viewer.

If you have any questions, please contact PJM's Member Relations or 610-666-8980

Maintenance to Markets Gateway, Data Miner, SCED, and ASO in Prod. on October 27 from 2:50 p.m. - 5:00 p.m. EPT

10.27.2026 from 14:50 to 17:00

PJM will be performing system maintenance to Markets Gateway, Data Miner, Security Constrained Economic Dispatch (SCED), and Ancillary Services Optimizer (ASO) in the Production environment on Tuesday, October 27, 2026, from 2:50 p.m. - 5:00 p.m. EPT (1450 - 1700 hours).

During this maintenance, there will be an outage of up to 45 minutes.

Stale data will appear on Data Miner, PJM Now, Data Viewer and PJM.com.

PJM may utilize manual economic dispatch for generation control.

​​​​​​​Impacted Tools

Markets Gateway

Data Miner

Security Constrained Economic Dispatch (SCED)

Ancillary Services Optimizer (ASO)

Fall Daylight Savings Time Transition

11.1.2026 from 00:00 to 03:00

This is a reminder that Daylight Savings Time (DST) will be occurring on Sunday, November 1, at 2:00 a.m. EST (0200 hours).

Information regarding the 2026 Fall Daylight Savings Transition for the PJM Markets Gateway application will be available on the Markets Gateway Tools page.

Stakeholders should ensure that all Markets Gateway offers are verified for the additional hour.

If you have any questions regarding this communication, please contact PJM's Member Relations or (610) 666-8980.