Issuer:

Westar Energy, Inc.

Issue of Securities:

First Mortgage Bonds, 6.10% Series due 2047

Ratings:

Moody’s: Aaa; S&P: AAA; Fitch: AAA
(Note: a securities rating is not a recommendation to buy, sell or hold securities and may be subject to revision or withdrawal at any time.)

Insurer:

Financial Guaranty Insurance Company

Aggregate Principal Amount:

$150,000,000 (6,000,000 bonds)

Bondable Property:

As of March 31, 2007, approximately $99.5 million principal amount of additional first mortgage bonds could be issued under the most restrictive provisions of the company’s mortgage, taking into account the issuance of $150,000,000 of first mortgage bonds offered hereby.

Net Proceeds:

Approximately $144.1 million, after deducting the underwriters’ discounts and estimated offering expenses.

Denomination:

$25.00 (each $25.00 principal amount, a “bond”)

Maturity:

May 15, 2047

Coupon:

6.10% per annum, accruing from May 16, 2007

Interest Payment Dates:

Quarterly on May 15, August 15, November 15 and February 15, beginning on August 15, 2007

Redemption:

Westar may redeem the bonds, in whole or in part, at any time on or after May 15, 2012 at a redemption price equal to 100% of the principal amount redeemed plus accrued and unpaid interest to the redemption date.

CUSIP Number:

95709T 704

ISIN Number:

US95709T7046

Format:

SEC Registered

Expected Listing:

NYSE

Transaction Date:

May 11, 2007

Settlement Date:

May 16, 2007 (T+3)

Public Offering Price:

$25.00 per note; $150,000,000 total

Joint Book-Running Managers:

Citigroup Global Markets Inc. Wachovia Capital Markets, LLC

Senior Co-Manager:

UBS Securities LLC

Co-Managers:

Banc of America Securities LLC Barclays Capital Inc. Deutsche Bank Securities Inc.