StanCorp Financial Group, Inc. To Announce First Quarter 2013 Financial Results On April 23, 2013 And Hold A Conference Call On April 24, 2013

StanCorp Financial Group, Inc. (“StanCorp”) (NYSE: SFG) will release first quarter 2013 financial results on Tuesday, April 23, 2013, following the close of the market. The earnings press release and the quarterly statistical supplement will be available shortly thereafter on the Company’s website at www.stancorpfinancial.com.

StanCorp will also hold an investor and analyst conference call to review StanCorp’s first quarter 2013 results on Wednesday, April 24, 2013, at noon, Eastern time (9:00 a.m. Pacific time).

To listen to the live webcast of this conference call, visit www.stancorpfinancial.com. Windows Media Player™ will be required to listen to the webcast. A webcast replay will be available starting approximately two hours after the original broadcast. The replay will be available through June 14, 2013.

A telephone replay of the conference call will also be available approximately two hours after the conference call by dialing (877) 660-6853 or (201) 612-7415 and entering the conference identification number 410589. The replay will be available through May 3, 2013.

About StanCorp Financial Group, Inc.

StanCorp Financial Group, Inc., through its subsidiaries marketed as The Standard — Standard Insurance Company, The Standard Life Insurance Company of New York, Standard Retirement Services, StanCorp Mortgage Investors, StanCorp Investment Advisers, StanCorp Real Estate and StanCorp Equities — is a leading provider of financial products and services. StanCorp’s subsidiaries offer group and individual disability insurance, group life and accidental death and dismemberment insurance, group dental and group vision insurance, absence management services, retirement plans products and services, individual annuities, origination and servicing of fixed-rate commercial mortgage loans, and investment advice. For more information about StanCorp Financial Group, Inc., visit its investor website at www.stancorpfinancial.com.

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