(1) The allocation for 2023-2024 for the public school employees’ retirement system pursuant to the public school employees retirement act of 1979, 1980 PA 300, MCL 38.1301 to 38.1437, is made using the individual projected benefit entry age normal cost method of valuation and risk assumptions adopted by the public school employees retirement board and the department of technology, management, and budget.

    (2) The annual level percentage of payroll contribution rates for the 2023-2024 fiscal year, as determined by the retirement system, are estimated as follows:

    (a) For public school employees who first worked for a public school reporting unit before July 1, 2010 and who are enrolled in the health premium subsidy, the annual level percentage of payroll contribution rate is estimated at 48.23% with 31.34% paid directly by the employer.

    (b) For public school employees who first worked for a public school reporting unit on or after July 1, 2010 and who are enrolled in the health premium subsidy, the annual level percentage of payroll contribution rate is estimated at 44.37% with 27.48% paid directly by the employer.

    (c) For public school employees who first worked for a public school reporting unit on or after July 1, 2010 and who participate in the personal healthcare fund, the annual level percentage of payroll contribution rate is estimated at 43.12% with 26.23% paid directly by the employer.

    (d) For public school employees who first worked for a public school reporting unit on or after September 4, 2012, who elect defined contribution, and who participate in the personal healthcare fund, the annual level percentage of payroll contribution rate is estimated at 37.85% with 20.96% paid directly by the employer.

    (e) For public school employees who first worked for a public school reporting unit before July 1, 2010, who elect defined contribution, and who are enrolled in the health premium subsidy, the annual level percentage of payroll contribution rate is estimated at 39.10% with 22.21% paid directly by the employer.

    (f) For public school employees who first worked for a public school reporting unit before July 1, 2010, who elect defined contribution, and who participate in the personal healthcare fund, the annual level percentage of payroll contribution rate is estimated at 37.85% with 20.96% paid directly by the employer.

    (g) For public school employees who first worked for a public school reporting unit before July 1, 2010 and who participate in the personal healthcare fund, the annual level percentage of payroll contribution rate is estimated at 46.98% with 30.09% paid directly by the employer.

    (h) For public school employees who first worked for a public school reporting unit after January 31, 2018 and who elect to become members of the MPSERS plan, the annual level percentage of payroll contribution rate is estimated at 44.05% with 27.16% paid directly by the employer.

    (3) In addition to the employer payments described in subsection (2), the employer shall pay the applicable contributions to the Tier 2 plan, as determined by the public school employees retirement act of 1979, 1980 PA 300, MCL 38.1301 to 38.1437.

    (4) The contribution rates in subsection (2) reflect an amortization period of 15 years for 2023-2024. The public school employees’ retirement system board shall notify each district and intermediate district by February 28 of each fiscal year of the estimated contribution rate for the next fiscal year.