The Department of Legislative Services, the General Assembly’s staff agency, has published a comprehensive look at county/municipal tax setoffs, available online here.
The report details the varying laws affecting each county, and the practices used in implementing a property tax differential (separate lower county rate within the municipal area) or a tax rebate (county payment to municipal government for services rendered within the municipal area).
The overall summary of each county’s laws and practices appears on page 6 of the report, click here to direct to that page.