June 23, 2009 Actual Update For June 15, 2009 Posting Formula Rate Customer Meeting

Protocols Definitions Rate Year is defined as January 1 through December 31 True-Up is completed on or before June 15 each calendar year. based on historical (actual) data (primarily Form 1 data from previous year) Annual Update recalculates the ATRR and Formula Rate for new Rate Year uses historical data collected during True-Up Phase adds in the projected data is calculated and posted on or before October 15 each calendar year.

Protocols Timeline ********************************************************************************************* Rate Year: January 1 – December 31, 2010 ********************************************************************************************* True Up Update: June 15, 2009 True Up Customer Meeting: June 23, 2009 This date is kick off for Review Period True Up Information Requests Period – 75 days: August 31, 2009 Issues - Westar Energy Response Date: Good faith effort to respond within 10 business days from date of information request. Additional periods for data review resolutions, per Protocols posted on WR OASIS ********************************************************************************************** Annual Update: October 15, 2009 Annual Update Customer Meeting: October 22, 2009 Potential Repost of Annual Update: November 30, 2009 **********************************************************************************************

Protocols OASIS Postings / Data Requests OASIS Posting Requirements: Updated Calculation Protocols Accounting Manual and changes Data Request Submission Address Submission of Data Requests to: Sheila Gropp Westar Energy 818 Kansas Avenue Topeka, KS Please provide all Data Requests in writing via or letter.

Key Data Locations FERC Form 1 Data : FERC.gov (Westar Energy Form 1) Formula Rate Postings: Westar Energy Oasis or Accounting Data User ID: AFSReader Accounting Data Password: AFSReader#1 Southwest Power Pool Oasis or

Formula Inputs Sheila Gropp

Formula Inputs Index of Template Pages Tab IDSchedule/Worksheet DesignationDescriptionDate to be Posted Actual Net Rev ReqSchedule Actual Net Rev ReqActual net revenue requirements for most recent calendar yearJune 15 Gross Rev ReqSchedule Actual Gross Rev ReqActual gross revenue requirements for most recent calendar yearJune 15 A-1Revenue CreditActual revenue creditsJune 15 A-2Actual transmission loadWE RevenuesJune 15 A-3Actual Retail AdderWE DivisorJune 15 A-4Actual O&M Exclusions (WEN)WE Retail AdderJune 15 A-5Actual Accum Deferred Income Taxes (WEN)WEN O&M ExclusionsJune 15 A-6Actual O&M Exclusions (WES)WEN ADITJune 15 A-7Actual Accum Deferred Income Taxes (WEN)WES O&M ExclusionsJune 15 A-8Actual Depreciation Rate CalculationWES ADITJune 15 A-9Actual Base Plan Funded ProjectsDepreciation AdjustmentJune 15 A-10Actual Wages and SalariesPlant Additions for Upcoming YearJune 15 A-11Actual Incentive Return on Incentive PlantIncentive Plant AdditionsJune 15 A-12Actual Economic Portfolio Funded ProjectsBase Plan Funded AdditionsJune 15 TUTrue-upTrue-up Adjustment and Interest CalculationOct 15 BPFBPF SummaryTotal Actual and Projected BPF projectsOct 15 EPPEPP SummaryTotal Actual and Projected EPP projectsOct 15 Projected Net Rev ReqProjected Net Rev RequirementProjected net revenue requirements for next calendar yearOct 15 Projected Gross Rev Req Projected gross revenue requirements for next calendar yearOct 15 P-1Transmission PlantProjected transmission plant for next calendar yearOct 15 P-2Exp. & Rev. CreditsProjected expenses and revenue credits for next calendar yearOct 15 P-3Trans. Network LoadProjected transmission load for next calendar yearOct 15 P-4BPF ProjectsProjected Base Plan Funded ProjectsOct 15 P-5Econ. ProjectsProjected Economic Portfolio Funded ProjectsOct 15

Formula Components Annual Update Data Included Historical 2008 financial data Westar Energy Form 1 Kansas Gas & Electric Form 1 FERC Approved Incentive Plant – Actual SPP Projects - Actual Template References: Template Form 1 Reference format: Page, Line, Column Worksheet Reference format: Worksheet P-1 (with section if applicable) Yellow areas are change areas

References and Clarifications 1 Actual Gross Revenue Requirements Entered as + due to line 20 formula References and Clarifications: If you see any references that are not correct or if you have any suggestion, please let me know.

References and Clarifications 2 Base Plan Funded Projects Actual A-9 – Actual BPF Plant Gross Plant is the accumulation of plant placed in-service through the end of $7,483,253 includes plant in-service from Accm. Deprec. is the total accumulated depreciation on these plant additions based on in-service dates.

References and Clarifications 3 Incentive Projects ActualIncentive Projects Projected A-11 – Incentive Plant P-1 – Projected Trans Plant Incentive Section

Wrap Up

Thank You!