Under Act 12, the City of Milwaukee was permitted to impose a sales and use tax of 2.0 percent and use the revenue to address the Retirement System’s unfunded actuarial liability. Act 12 had other requirements, including:
- the Retirement System long-term expected rate of return assumption is 6.8 percent;
- employees hired after December 31, 2023, are required to join the Wisconsin Retirement System; and
- no increases or enhancements may be made to the Retirement System benefits for employees remaining in the Retirement System after December 31, 2023, except those required for compliance with federal law.



