Amends the Illinois Municipal Retirement Fund (IMRF) Article of the Illinois Pension Code. Provides that the amendatory Act may be referred to as the Pension Equity Act. Provides that, beginning on January 1, 2027, for all purposes under the Code (including, without limitation, the calculation of benefits and employee contributions), the annual earnings of a Tier 2 sheriff's law enforcement employee shall not include overtime and shall not exceed $145,649.97 (instead of $108,600, as adjusted annually beginning in 2011) plus the lesser of (i) 3% of that amount or (ii) the annual unadjusted percentage increase (instead of one-half the annual unadjusted percentage increase) in the consumer price index-u for the 12 months ending with September 2026. Provides that, beginning on January 1, 2028, that amount shall annually thereafter be increased by the lesser of (i) 3% of that amount, including all previous adjustments, or (ii) the annual unadjusted percentage increase (instead of one-half the annual percentage increase) in the consumer price index-u for the 12 months ending with the September preceding each November 1, including all previous adjustments. Provides that, as soon as practical on or after the effective date of the amendatory Act, with regard to benefits earned for the years 2012 through 2026, the Fund shall recalculate benefits for Tier 2 sheriff's law enforcement employees based on the annual salary limitation that was in effect for that year for Tier 2 police officers under the Downstate Police Article. Provides that the changes shall not result in any retroactive adjustment of any employee contributions. Amends the State Mandates Act to require implementation without reimbursement. Effective immediately.