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Rate Case Filing Requirements

UPDATE 10/11/17: Under PA 341, the Commission must decide rate cases within 10 months instead of 12 months, as previously required. In a July ruling, the MPSC adopted standard rate case filing forms and instructions, but questions subsequently were raised about specific wording used in the ruling and what that means for meeting the new deadline schedule.

The Commission ruled on October 11, 2017, in Case No. U-18238 that rate cases will be decided within the 10-month window required by the law, but that attachments to the final decision, including tariff rates sheets, can still be issued after the disposition of the case.

2016 PA 341 Sec. 6a shortened the amount of time the MPSC has to issue a final order in a rate case from 12 months to 10 months. It also eliminates the ability of a utility to self-implement a rate increase after 6 months if a final order has yet to be issued. Additionally, providers are required to provide notice to the MPSC prior to filing a rate case; small natural gas utilities have the ability to request “partial and immediate rate relief” as part of a rate case; and rate regulation is extended to steam utilities (in addition to electric and natural gas utilities). The MPSC needs to amend rate case filing requirements to account for these changes.


  • Four orders issued
  • Held two collaborative stakeholder sessions
  • A 10-month schedule was created
  • Partial and Immediate Rate Relief rules were added into the filing requirements
  • Discovery and process guidelines were refined
  • Part I, II, and III of the filing previous filing requirements were amended and attachments 1 through 13 were created

Additional Steps

  • Convene a new collaborative on the rate case filing requirements as directed by the Commission in Case No. U-18238. 

Task Reports


Task Events

June 21, 2017

Deadline for comments on MPSC staff's final proposal

June 9, 2017

Deadline for MPSC staff's final proposal filing

May 15 and May 22, 2017

Collaborative sessions held by the Commission. Those who are interested in participating in the collaborative sessions must submit a letter indicating the names and contact information of their representatives via email to or by fax to (517) 284-8304.  

May 3, 2017

Comments due on the MPSC staff's filing

April 10, 2017

MPSC staff files initial proposal on the schedule and procedure for establishing new rate case filing requirements


Task - Related Documents and Links

October 11, 2017

Commission Ruling U-18238

July 31, 2017

Press Release and Order approving amended rate case standard filing requirements

May 22, 2017

Collaborative Agenda

May 15, 2017

Collaborative Agenda