Exhibit 10.15 TECO ENERGY GROUP SUPPLEMENTAL EXECUTIVE RETIREMENT PLAN FOR GIRARD F. ANDERSON SECTION 1. PURPOSE AND EFFECTIVE DATE The purpose of this plan is to provide Girard F. Anderson, President and Chief Operating Officer of TECO Energy, with additional retirement income by supplementing the retirement benefits provided under the retirement plan. The plan was originally effective as of July 20, 1993. The effective date of this amendment and restatement is October 16, 1996. SECTION 2. DEFINITIONS This section contains definitions of terms used in the plan. Where the context so requires, the singular includes the plural, and the plural includes the singular. 2.1 Annual earnings will have the same meaning as in the retirement plan, except that the same will be determined without regard to (a) any dollar limitation on such annual earnings that may be imposed under the retirement plan or (b) any reduction in taxable income as a result of voluntary salary reduction deferrals under the TECO Energy Group Retirement Savings Excess Benefit Plan. 2.2 Average annual earnings of Mr. Anderson as of any date of reference means the average of his annual earnings during whichever of the following periods yields the highest average: (a) the 36 consecutive months of active employment preceding the date of reference (or all months of employment if less than 36), or (b) any three consecutive calendar years out of the five calendar years preceding the date of reference. Bonuses are included as compensation for the period in which paid, provided that if more than three regular annual bonuses are paid in any 36 consecutive month period, only the largest three bonuses will be counted. 2.3 Board means the Board of Directors of TECO Energy. 2.4 Committee means the retirement plan committee as constituted under the retirement plan. 2.5 TECO Energy means TECO Energy, Inc. and any successor to all or a major portion of its assets or business which assumes the obligations of TECO Energy, Inc. under this plan. 2.6 Disability income plan means the TECO Energy Group Disability Income Plan, as amended from time to time. - 211 - Exhibit 10.15 2.7 Plan means the TECO Energy Group Supplemental Executive Retirement Plan for Girard F. Anderson, as set forth in this plan instrument, and as it may be amended from time to time. 2.8 Retirement means termination of Mr. Anderson's employment with TECO Energy by Mr. Anderson or TECO Energy for any reason. 2.9 Retirement plan means the TECO Energy Group Retirement Plan, as amended from time to time. 2.10 Service will have the same meaning as "plan service" in the retirement plan. 2.11 Social security benefit of Mr. Anderson as of any date of reference (the "computation date") means the primary insurance amount to which he is or would be entitled, payable under Title II of the Social Security Act as in effect on such date, based on the assumptions: (a) that no changes in the benefit levels payable or the wage base under Title II occur after the computation date; (b) that, if the computation date falls before his 62nd birthday, his annual earnings during the calendar year in which the computation date falls and during any subsequent calendar year before the calendar year in which his 62nd birthday falls is zero; (c) that payment of his primary insurance amount begins for the month after he reaches age 62, or his date of retirement if later, without reduction or delay because of future gainful employment or delay in applying for benefits; and (d) that his earnings for calendar years before the calendar year in which the computation date falls will be determined using his actual earnings history if available, and otherwise by applying a six percent retrospective salary scale to his rate of annual earnings in effect on the computation date. The social security benefit of Mr. Anderson if he retires after his 65th birthday will include any delayed retirement credit. 2.12 Survivor income plan means the TECO Energy Group Survivor Income Plan, as amended from time to time. SECTION 3. RETIREMENT BENEFITS 3.1 Retirement at or after age 62. Subject to the reductions in Section 6.1 below, if Mr. Anderson retires on or after attaining age 62, he will receive a supplemental monthly retirement benefit equal to one-twelfth of 60 percent of his average annual earnings (60 percent is equal to three percent multiplied by a maximum of 20 years of service). Mr. Anderson's retirement benefit hereunder will be calculated using his average annual earnings as of his actual date of retirement. 3.2 Retirement before age 62. Subject to the reductions in Section 6.1 below, if Mr. Anderson retires before attaining age 62, he will receive a supplemental monthly retirement benefit equal to one-twelfth of 60 percent of his average annual earnings reduced by 5/12ths of one percent for each month by which the start of payments precedes age 62. 3.3 Form of Payment. - 212 - Exhibit 10.15 (a) Normal form of retirement benefits. The normal form of retirement benefit payable to Mr. Anderson under the plan is a life annuity. Benefits payable in the normal form will begin on the first day of the month coinciding with or next following the date of Mr. Anderson s retirement. (b) Optional lump sum benefit. In lieu of the normal form of benefit, Mr. Anderson may elect to receive payment of his benefit in the form of a commuted single sum payment that is the actuarial equivalent of the normal form of benefit (including the value of the post-retirement surviving spouse benefit under Section 4.2(c)). If Mr. Anderson elects to receive a lump sum payment, such payment will be made on the first day of the month coinciding with or next following the date Mr. Anderson s employment terminates. Actuarial equivalence will be based on the actuarial assumptions specified from time to time in the retirement plan for lump sum payments. Mr. Anderson s election to receive a lump sum payment will be effective only with respect to a retirement occurring at least 12 months after the date Mr. Anderson submits the election, provided that elections submitted on or before December 31, 1996 will be immediately effective. SECTION 4. SURVIVING SPOUSE BENEFIT 4.1 Eligibility. Mr. Anderson's surviving spouse will receive the surviving spouse benefit if Mr. Anderson and his spouse were married to each other for at least the 12 months preceding Mr. Anderson's date of death and, in the case of Mr. Anderson's death after retirement, Mr. Anderson and his spouse were married to each other on Mr. Anderson's date of retirement. 4.2 Amount of surviving spouse benefit. Subject to the reductions described in Section 6.2 below, the benefit provided under the plan to Mr. Anderson's surviving spouse will be determined as follows: (a) Pre-retirement before age 62. If Mr. Anderson dies during employment with TECO Energy and before his 62nd birthday, his surviving spouse will receive a monthly survivor income payment equal to 50 percent of his monthly projected retirement benefit. Mr. Anderson's monthly projected retirement benefit is the monthly benefit he would have received if he had retired at age 62 under Section 3.1 calculated using his average annual earnings determined as of his date of death. (b) Pre-retirement on or after age 62. If Mr. Anderson dies during employment with TECO Energy on or after his 62nd birthday, his surviving spouse will receive a monthly survivor income payment equal to 50 percent of his monthly retirement benefit earned under Section 3.1 using his average annual earnings as of his date of death. (c) Post-retirement. If Mr. Anderson dies on or after the date of his retirement, his surviving spouse will receive a monthly survivor income payment equal to 50 percent of the monthly benefit payment he was receiving at his death (or would have received if he had survived until the first payment date). - 213 - Exhibit 10.15 4.3 Form and time of surviving spouse benefit. Surviving spouse benefits under this Section 4 will be payable only in the form of a life annuity to the surviving spouse. Benefit payments will begin on the first day of the month coinciding with or next following the date of Mr. Anderson's death. 4.4 Death benefit where lump sum paid. If Mr. Anderson received a lump sum payment of his benefit under Section 3.3(b), no surviving spouse benefit or other death benefit will be payable under the plan to any person. SECTION 5. DISABILITY 5.1 If Mr. Anderson suffers a total disability (as defined in the disability income plan) before age 62, he will continue to be credited with service as if he were actively employed by TECO Energy during his period of total disability. Mr. Anderson may not receive benefits under this plan at any time when he is receiving disability income payments under the disability income plan. Benefits under this plan will begin when payments cease under the disability income plan. 5.2 Mr. Anderson's disability date is his last day of work for TECO Energy before becoming unable to continue working because of his total disability. A period of total disability of Mr. Anderson will begin on his disability date and will end on the earlier of the last day of the month in which his final disability income payment is due under the disability income plan or on the date he retires hereunder and starts receiving benefit payments. 5.3 If Mr. Anderson does not return to active service with TECO Energy after suffering a total disability, his retirement benefits under Section 3 will be calculated using his average annual earnings as of his disability date, his total service including service credited under Section 5.1 above, and his primary social security benefit as of his date of disability. 5.4 If Mr. Anderson dies while disabled, his surviving spouse will, if eligible, receive the pre-retirement surviving spouse benefit determined under Section 4.2(a) or (b). SECTION 6. OFFSET FOR OTHER PAYMENTS 6.1 Mr. Anderson's retirement benefit will be reduced (but not below zero) by the following payments, with such reductions starting when such payments are assumed to begin: (a) 100 percent of the social security benefit of Mr. Anderson assuming such benefit begins on the later of the date he reaches age 62 or his actual retirement, and (b) the amount of his benefit payments under the retirement plan (converted to a life annuity if such payments are in an optional form), assuming such payments begin on his actual retirement date. - 214 - Exhibit 10.15 6.2 The benefit of Mr. Anderson's surviving spouse will be reduced (but not below zero) by the following payments: (a) payments under the survivor income plan, and (b) payments under the retirement plan. SECTION 7. BENEFITS NOT CURRENTLY FUNDED 7.1 Nothing in this plan will be construed to create a trust or to obligate TECO Energy or any other employer to segregate a fund, purchase an insurance contract, or in any other way currently to fund the future payment of any benefits hereunder, nor will anything herein be construed to give Mr. Anderson or any other person rights to any specific assets of TECO Energy or of any other employer or entity. 7.2 Notwithstanding Section 7.1, TECO Energy has established a grantor trust of which it is treated as the owner under Section 671 of the Internal Revenue Code to provide for the payment of benefits hereunder. SECTION 8. ADMINISTRATION The plan will be administered by the committee, which will have full power and authority to construe, interpret and administer the plan. Decisions of the committee will be final and binding on all persons. The committee may, in its discretion, adopt, amend and rescind rules and regulations relating to the administration of the plan. SECTION 9. RIGHTS NON-ASSIGNABLE Neither Mr. Anderson, his surviving spouse, nor any other person will have any right to assign or otherwise to alienate the right to receive payments under the plan, in whole or in part. SECTION 10. OTHER BENEFIT PLANS This plan will supersede any obligation to pay benefits to Mr. Anderson under the excess benefit plan contained in the retirement plan or the TECO Energy Group Supplemental Executive Retirement Plan, as they may be amended from time to time. No benefits will be payable to Mr. Anderson under such excess benefit plan or the TECO Energy Group Supplemental Executive Retirement Plan. SECTION 11. AMENDMENT TECO Energy reserves the right at any time by action of the board to amend the plan in any way. However, no amendment of the plan may reduce the benefits to be paid to Mr. Anderson or his surviving spouse below those that would have been paid if the plan had continued without change to the date of Mr. Anderson's retirement or termination of employment for any reason. - 215 - Exhibit 10.15 Executed as of October 16, 1996. TECO ENERGY, INC. By: ____________________________________ Roger A. Dunn Vice President - Human Resources GIRARD F. ANDERSON - 216 -