Senate advances Tier 5 pension reform after hours of debate

The Mississippi Senate passed legislation creating a new retirement option commonly described as "Tier 5," a hybrid plan that combines a smaller defined-benefit (DB) component with a mandatory defined-contribution (DC) account for employees hired after March 1, 2026.

Lawmakers debated the plan for hours, with supporters saying the hybrid design steers additional dollars toward the pension system's large unfunded actuarial liability and avoids steep employer cost spikes. Opponents said the change shifts long-term investment risk from the state to individual workers and urged alternatives such as a smaller cost-of-living adjustment (COLA) tied to age or CPI.

Senator Michael Sparks, sponsor of the measure, told colleagues the hybrid structure would use the current employer contribution rate (scheduled to rise to 19.9%) to fund both a reduced DB formula and a DC account funded by a 5% portion of the employee 9% contribution. The state's actuaries projected the structure would direct roughly $140 million more per year toward the unfunded liability compared with continuing the current plan for new hires, Sparks said.

Several senators urged caution. Senator David Blunt noted an actuary's analysis presented to the chamber that a straight DB plan with a 1% COLA would leave both retirees and the system better off in some long-range scenarios, and argued that the Senate should consider that alternative before finalizing a hybrid. Senator Bill Bridal urged looking at targeted COLA start ages (for example beginning at age 70) as a narrower way to protect long-lived retirees.

Senator Wiggins and other backers said the state faces rising employer cost projections if no change is made and that the hybrid preserves defined benefits for existing members and retirees while offering portability and retirement-savings options to future employees.

After extended debate, the measure passed on final vote 30 yeas to 16 nays. The bill as adopted preserves current benefits and COLA guarantees for existing members and retirees; the change affects new hires as of March 1, 2026. The new DC account will be administered under the retirement system; employers may be authorized to offer discretionary matching contributions as allowed under federal tax rules.

Supporters said the bill moves money sooner toward the pension system's liabilities without further immediate increases in the statutory employer rate beyond the current schedule. Critics said the plan transfers investment risk to employees and could complicate recruitment for public employers unless offsetting compensation tools are used.

The Senate's passage sends the measure to the House for consideration. If adopted as written, the changes would take effect for employees hired on or after March 1, 2026.

Votes at a glance: final passage 30-16 (Senate roll call).