Mississippi Code
Article 3 - Additional State Retirement and Disability Benefits
§ 25-11-112. Additional annual payment to retirees and beneficiaries

[(1.03)n - 1] x [annual retirement allowance],
where n is the number of full fiscal years in retirement beginning with the fiscal year in which the member reaches age fifty-five (55).
[(1.03)n - 1] x [annual retirement allowance],
where n is the number of full fiscal years in retirement beginning with the fiscal year in which the member reaches age sixty (60).