Formula Transmission Rate Filings

2026

Formula Transmission Rate TO2027 Draft Annual Update - June 12, 2026
- Draft Filing Letter
- Attachment 1: Draft Formula Determination of Base TRR (PDF / Excel)
- Attachment 2: Draft Retail and Wholesale Transmission Rates Effective January 1, 2027
- Attachment 3: Draft Revisions to Formula Rate Inputs Compared to June 12, 2026
- Attachment 4: Workpapers
Post Retirement Benefits Other than Pensions (PBOPs) Filing - March 27, 2026 (Docket No. ER26-1945)
General and Intangible Depreciation Formula Rate Revision Filing (Docket ER26-1526) – February 27, 2026
- Filing

2025

Formula Transmission Rate TO2026 Annual Update (Docket ER26-602) - November 21, 2025
- Filing Letter
- Attachment 1: Formula Determination of Base TRR (PDF / Excel)
- Attachment 2: Retail and Wholesale Transmission Rates Effective January 1, 2026
- Attachment 3: Revisions to Formula Rate Inputs Compared to June 13, 2025
- Attachment 4: Workpapers
Order 898 Formula Rate Revision Filing (Docket ER26-538) – November 18, 2025
- Filing package
- Supplemental excel file
Formula Transmission Rate TO2026 Draft Annual Update - June 13, 2025
- Draft Filing Letter
- Attachment 1: Draft Formula Determination of Base TRR (PDF / Excel)
- Attachment 2: Draft Retail and Wholesale Transmission Rates Effective January 1, 2026
- Attachment 3: Draft Revisions to Formula Rate Inputs Compared to June 13, 2025
- Attachment 4: Workpapers
Post Retirement Benefits Other than Pensions (PBOPs) Filing - March 26, 2025

2024

Formula Transmission Rate TO2025 Annual Update - November 22, 2024
- Filing Letter
- Attachment 1: Formula Determination of Base TRR (PDF / Excel)
- Attachment 2: Retail and Wholesale Transmission Rates Effective January 1, 2025
- Attachment 3: Revisions to Formula Rate Inputs Compared to June 14, 2024
- Attachment 4: Workpapers
Formula Transmission Rate TO2025 Draft Annual Update - June 14, 2024
- Draft Filing Letter
- Attachment 1: Draft Formula Determination of Base TRR (PDF / Excel)
- Attachment 2: Draft Retail and Wholesale Transmission Rates Effective January 1, 2025
- Attachment 3: Draft Revisions to Formula Rate Inputs Compared to June 14, 2024
- Attachment 4: Workpapers
South Georgia Formula Rate Revision Filing - April 12, 2024
Post Retirement Benefits Other than Pensions (PBOPs) Filing - March 27, 2024

2023

Formula Transmission Rate TO2024 Annual Update - November 17, 2023
- Filing Letter
- Attachment 1: Formula Determination of Base TRR (PDF / Excel)
- Attachment 2: Retail and Wholesale Transmission Rates Effective January 1, 2024
- Attachment 3: Revisions to Formula Rate Inputs Compared to June 15, 2023
- Attachment 4: Workpapers
Formula Transmission Rate TO2024 Draft Annual Update - June 15, 2023
- Draft Filing Letter
- Attachment 1: Draft Formula Determination of Base TRR (PDF / Excel)
- Attachment 2: Draft Retail and Wholesale Transmission Rates Effective January 1, 2024
- Attachment 3: Draft Revisions to Formula Rate Inputs Compared to June 15, 2023
- Attachment 4: Workpapers
Post Retirement Benefits Other than Pensions (PBOPs) Filing - March 24, 2023

2022

Formula Transmission Rate TO2023 Annual Update - November 18, 2022
- Filing Letter
- Attachment 1: Formula Determination of Base TRR (PDF / Excel)
- Attachment 2: Retail and Wholesale Transmission Rates Effective January 1, 2023
- Attachment 3: Revisions to Formula Rate Inputs Compared to June 15, 2022
- Attachment 4: Workpapers
Formula Transmission Rate TO2021 & TO2022 Amended Annual Updates - November 15, 2022
- Filing Letter
- Attachments
Formula Transmission Rate TO2023 Draft Annual Update - June 15, 2022
- Draft Filing Letter
- Attachment 1: Draft Formula Determination of Base TRR (PDF) / (Excel)
- Attachment 2: Draft Retail and Wholesale Transmission Rates Effective January 1, 2023
- Attachment 3: Draft Revisions to Formula Rate Inputs Compared to June 15, 2022
- Attachment 4: Workpapers
Post Retirement Benefits Other than Pensions (PBOPs) Filing - March 25, 2022
Depreciation Update Filing – February 25, 2022
Order 864 Compliance Filing – January 18, 2022
- Filing Letter
- TO Tariff Revisions

2021

Formula Transmission Rate TO2022 Annual Update - November 19, 2021
- Filing Letter
- Attachment 1: Formula Determination of Base TRR (PDF / Excel)
- Attachment 2: Retail and Wholesale Transmission Rates Effective January 1, 2022
- Attachment 3: Revisions to Formula Rate Inputs Compared to June 15, 2021
- Attachment 4: Workpapers
Formula Transmission Rate TO2020 & TO2021 Amended Annual Updates - November 15, 2021
- Filing Letter
- Attachments
Formula Transmission Rate TO2022 Draft Annual Update - June 15, 2021
- Draft Filing Letter
- Attachment 1: Draft Formula Determination of Base TRR (PDF) / (Excel)
- Attachment 2: Draft Retail and Wholesale Transmission Rates Effective January 1, 2022
- Attachment 3: Draft Revisions to Formula Rate Inputs Compared to June 15, 2021
- Attachment 4: Workpapers
Post Retirement Benefits Other than Pensions (PBOPs) Filing-- March 26, 2021

2020

Formula Transmission Rate TO2021 Annual Update - November 20, 2020
- Filing Letter
- Attachment 1: Formula Determination of Base TRR (PDF) / (Excel)
- Attachment 2: Retail and Wholesale Transmission Rates Effective January 1, 2021
- Attachment 3: Revisions to Formula Rate Inputs Compared to July 8, 2020
- Attachment 4: Workpapers
- Attachment 5: TO2019 True Up TRR (PDF) / (Excel) and Incremental Workpapers
Formula Transmission Rate TO2021 Draft Annual Update - July 8, 2020
- Draft Filing Letter
- Attachment 1: Draft Formula Determination of Base TRR (PDF) / (Excel)
- Attachment 2: Draft Retail and Wholesale Transmission Rates Effective January 1, 2020
- Attachment 3: Draft Revisions to Formula Rate Inputs Compared to July 8, 2020
- Attachment 4: Workpapers
- Attachment 5: TO2019 True Up TRR (PDF) / (Excel) and Incremental Workpapers
Formula Transmission Rate TO2019A Settlement Filing – June 30, 2020
- Filing Letter, Offer of Settlement & Explanatory Statement
- Exhibits A through G
Order 864 Filing – April 30, 2020
- Filing Letter
- Exhibit A
- Exhibit B (PDF/Excel)
- TO Tariff Revisions
Post Retirement Benefits Other than Pensions (PBOPs) Filing-- March 25, 2020
Depreciation Update Filing – February 21, 2020

2019

Formula Transmission Rate TO2020 Annual Update - November 22, 2019
- Filing Letter
- Attachment 1: Formula Determination of Base TRR (PDF) / (Excel)
- Attachment 2: Retail and Wholesale Transmission Rates Effective January 1, 2020
- Attachment 3: Revisions to Formula Rate Inputs Compared to June 14, 2019
- Attachment 4: Workpapers
- Attachment 5: TO2018 True Up TRR (PDF)/ (Excel) and Incremental Workpapers
Formula Transmission Rate TO2019A Partial Settlement Filing – September 27, 2019
- Filing Letter, Explanatory Statement & Offer of Settlement
- Exhibit A (Clean version | Redlined version)
Formula Transmission Rate TO2018 Settlement Filing – September 16, 2019
- Filing Letter, Explanatory Statement & Offer of Settlement
- Exhibits A through D
Formula Transmission Rate TO2020 Draft Annual Update - June 14, 2019
- Draft Filing Letter
- Attachment 1: Draft Formula Determination of Base TRR (PDF) / (Excel)
- Attachment 2: Draft Retail and Wholesale Transmission Rates Effective January 1, 2020
- Attachment 3: Draft Revisions to Formula Rate Inputs Compared to June 14, 2019
- Attachment 4: Workpapers
- Attachment 5: TO2018 True Up TRR (PDF)/ (Excel)
Formula Transmission Rate Filing TO2019A - April 11, 2019
- Volume 1: General Info
- Volume 2: Testimony
- Exhibit SCE-4: Formula Determination of Base TRR (PDF) / (Excel)
- Volume 3: Workpapers
Post Retirement Benefits Other than Pensions (PBOPs) Filing-- March 8, 2019
Phase 2 Retail Rate Change Filing – February 28, 2019

2018

Formula Transmission Rate TO2019 Annual Update - November 29, 2018
- Filing Letter
- Attachment 1: Formula Determination of Base TRR (PDF) / (Excel)
- Attachment 2: Retail and Wholesale Transmission Rates Effective January 1, 2019
- Attachment 3: Revision to Formula Rate Inputs Compared to June 15, 2018
- Attachment 4: Workpapers
- Attachment 5: TO13 True Up TRR (PDF)/ (Excel) and Incremental Workpapers
EV Rate Revision Filing - November 20, 2018
TCJA Revision Filing - September 17, 2018
Formula Transmission Rate TO2019 Draft Annual Update - June 15, 2018
- Draft Filing Letter
- Attachment 1: Draft Formula Determination of Base TRR (PDF) / (Excel)
- Attachment 2: Draft Retail and Wholesale Transmission Rates Effective January 1, 2019
- Attachment 3: Draft Revisions to Formula Rate Inputs Compared to June 15, 2018
- Attachment 4: Workpapers (1 / 2)
- Attachment 5: TO13 True Up TRR (PDF)/ (Excel) and Incremental Workpapers

2017

Successor Formula Transmission Rate TO2018 - October 27, 2017
- Volume 1: General Info
- Volume 2: Testimony
- Exhibit SCE-4: Formula Determination of Base TRR (PDF) / (Excel)
- Volume 3: Workpapers (1 / 2)
Formula Transmission Rate TO12 Annual Update - October 27, 2017
- Filing Letter
- Attachment 1: Formula Determination of Base TRR (PDF) / (Excel)
- Attachment 2: Retail and Wholesale Transmission Rates Effective January 1, 2018
- Attachment 3: Draft Revisions to Formula Rate Inputs Compared to June 15, 2017
- Attachment 4: Workpapers (1 / 2)
Formula Transmission Rate TO12 Draft Annual Update - June 15, 2017
- Draft Filing Letter
- Attachment 1: Draft Formula Determination of Base TRR (PDF) / (Excel)
- Attachment 2: Draft Retail and Wholesale Transmission Rates Effective January 1, 2018
- Attachment 3: Draft Revisions to Formula Rate Inputs Compared to June 15, 2016
- Attachment 4: Workpapers (1 / 2)
Accumulated Deferred Income Taxes (ADIT) Net Operating Loss (NOL) Revision Filing - February 1, 2017
- Filing Letter
- TO Tariff Revisions

2016

Formula Transmission Rate TO11 Annual Update - November 30, 2016
- Filing Letter
- Attachment 1: Formula Determination of Base TRR (PDF) / (Excel)
- Attachment 2: Retail and Wholesale Transmission Rates Effective January 1, 2017
- Attachment 3: Draft Revisions to Formula Rate Inputs Compared to June 15, 2016
- Attachment 4: Workpapers (1 / 2)
Post Retirement Benefits Other than Pensions (PBOPs) Filing--August 16, 2016
- Filing Letter
- Attachment 1: Formula Spreadsheet Schedule 35
- Attachment 2: Actuarial Report for 2015
- TO Tariff Revisions
Formula Transmission Rate TO11 Draft Annual Update - June 15, 2016
- Draft Filing Letter
- Attachment 1: Draft Formula Determination of Base TRR (PDF) / (Excel)
- Attachment 2: Draft Retail and Wholesale Transmission Rates Effective January 1, 2017
- Attachment 3: Draft Revisions to Formula Rate Inputs Compared to June 15, 2016
- Attachment 4: Workpapers (1 / 2)
Retail Rate Revision Filing-Standby Rates - April 13, 2016
Retail Rate Revision Filing-Net Energy Metering – March 30, 2016
Depreciation Update Filing - January 6, 2016

2015

Formula Transmission Rate TO10 Annual Update - December 1, 2015
- Filing Letter
- Attachment 1: Formula Determination of Base TRR (PDF ) / (Excel)
- Attachment 2: Retail and Wholesale Transmission Rates Effective January 1, 2016
- Attachment 3: Revisions to Formula Rate Inputs Compared to June 15, 2015
- Attachment 4: Workpapers (1 / 2)
Formula Transmission Rate TO10 Draft Annual Update - June 15, 2015
- Draft Filing Letter
- Attachment 1: Draft Formula Determination of Base TRR (PDF) / (Excel)
- Attachment 2: Draft Retail and Wholesale Transmission Rates Effective January 1, 2016
- Attachment 3: Draft Revisions to Formula Rate Inputs Compared to June 15, 2015
- Attachment 4: Workpapers (1 / 2)
Unfunded Reserves Filing - April 3, 2015
- Filing Letter
- Attachment 1: One Time True Up TRR Adjustment Workpaper (PDF) / (Excel)
- Attachment 2: Revised TO8 Formula Spreadsheet Workpaper (PDF) / (Excel)
- Attachment 3: Revised TO9 Formula Spreadsheet Workpaper (PDF) / (Excel)
- TO Tariff Revisions

2014

Formula Transmission Rate TO9 Annual Update - November 25, 2014
- Filing Letter
- Attachment 1: Formula Determination of Base TRR (PDF) / (Excel)
- Attachment 2: Retail and Wholesale Transmission Rates Effective January 1, 2015
- Attachment 3: Revisions to Formula Rate Inputs Compared to June 13, 2014
- Attachment 4: Workpapers (1 / 2)
Formula Transmission Rate TO8 Amended Annual Update - September 17, 2014
- Filing Letter
- Attachment 1: Formula Determination of Revised 2012 True Up TRR (PDF) / (Excel)
- Attachment 2: Revised Workpapers
- Attachment 3: Revised 2012 True Up TRR Explanation
- Attachment 4:Monthly Comparison of TRR Change
Post Retirement Benefits Other than Pensions (PBOPs) Filing--September 5, 2014
- Filing Letter
- Attachment 1: Formula Spreadsheet Schedule 35
- Attachment 2: Actuarial Report for 2013
- Attachment 3: Proposed Revised Formula Spreadsheet with TO9 Inputs
- Attachment 4: PBOPs Formula Rate Issue Description
- Attachment 5: Formula Spreadsheet
- TO Tariff Revisions
Formula Transmission Rate TO9 Draft Annual Update Revised- July 16, 2014
- Draft Filing Letter
- Explanation of ER08-375 CWIP ROE Change
- Attachment 1: Draft Formula Determination of Base TRR (PDF) / (Excel)
- Attachment 2: Draft Retail and Wholesale Transmission Rates Effective January 1, 2015
- Attachment 4: Revised Workpapers
Formula Transmission Rate TO9 Draft Annual Update - June 13, 2014
- Draft Filing Letter
- Attachment 1: Draft Formula Determination of Base TRR (PDF) / (Excel)
- Attachment 2: Draft Retail and Wholesale Transmission Rates Effective January 1, 2015
- Attachment 3: Draft Revisions to Formula Rate Inputs Compared to June 13, 2014
- Attachment 4: Workpapers (1 / 2)
Formula Transmission Rate TO8 Amended Annual Update (Draft) - June 13, 2014
- Notice of Revision to TO8 Annual Update
- Revised 2012 True Up TRR Explanation
- Attachment 1: Formula Determination of Revised 2012 True Up TRR (PDF) / (Excel )
- Attachment 4: Revised Workpapers

2013

Formula Transmission Rate TO8 Annual Update - November 26, 2013
- Filing Letter
- Attachment 1: Formula Determination of Base TRR (PDF) / (Excel)
- Attachment 2: Retail and Wholesale Transmission Rates Effective January 1, 2014
- Attachment 3: Revisions to Formula Rate Inputs Compared to September 24, 2013
- Attachment 4: Workpapers
Formula Transmission Rate TO8 Draft Annual Update Based on Aug 26, 2013 Offer of Settlement - September 24, 2013
- Draft Filing Letter
- Attachment 1: Draft Formula Determination of Base TRR (PDF) / (Excel)
- Attachment 2: Draft Retail and Wholesale Transmission Rates Effective January 1, 2014
- Attachment 3: Draft Revisions to Formula Rate Inputs Compared to September 24, 2013
- Attachment 4: Workpapers
FERC Formula Rate Settlement - August 26, 2013
2nd Formula Transmission Rate Draft Informational Filing - June 14, 2013
- Draft Filing Letter
- Draft Formula Determination of Base TRR (PDF) / (ZIP)
- Workpapers
Depreciation Update Filing - April 8, 2013
- Filing Letter and Affidavit
- Attachment
Retail Rate Revision Filing – March 29, 2013
- Filing Letter and Affidavit
- Revised Schedule 33 and Attachments

2012

1st Formula Transmission Rate Informational Filing - September 14, 2012
- Filing Letter & Attachments 2-3
- Formula Determination of Base TRR (PDF)/(ZIP)
- Workpapers
1st Formula Transmission Rate Draft Informational Filing - June 15, 2012
- Draft Filing Letter
- Draft Formula Determination of Base TRR (PDF) / (ZIP)
- Workpapers