House Bill 6005 amends section 34d of Michigan’s General Property Tax Act, which governs how local governments calculate “additions,” “losses,” and the millage reduction fraction used to limit property tax rates under the Headlee Amendment. The bill largely reorganizes and clarifies existing statutory language, but it also updates several definitions and formulas tied to taxable value calculations for real and personal property. It addresses omitted property, new construction, previously exempt property, replacement construction, environmental contamination, and public services, and it specifies how those items affect taxable value for purposes of local property tax administration.
The bill also revises the timing and responsibilities of assessing officers, county equalization directors, county treasurers, and local financial officers in computing and certifying taxable values and millage reduction fractions. It preserves the rule that local units generally may not levy property taxes above their reduced maximum rates without voter approval, and it continues to require recalculation and adjustment when equalization appeals or errors affect taxable value or millage limits. A notable substantive change is the addition of a future rule, beginning with taxes levied after 2026, that treats increased taxable value after a transfer of ownership as an “addition” only for purposes of the millage reduction fraction calculation.
In practical terms, the bill affects Michigan local property tax administration, including cities, townships, counties, school districts, and other taxing jurisdictions. It does not create a new tax, but it changes how taxable value growth is measured and how local millage limits are adjusted over time. The bill also cross-references the state constitution’s property tax limitation provisions and continues to tie tax administration to state equalization and inflation calculations published by the State Tax Commission.
Because there were no committee transcripts or recorded votes provided, there is no direct evidence of debate, support, or opposition in the available record. Based on the text alone, the bill appears technical and administrative rather than ideological, with its main effect being to refine property tax formulas and procedures. The only potentially notable policy issue is the treatment of post-transfer increases in taxable value for millage reduction purposes, which could affect how local tax capacity is calculated after property sales.
Overall, the bill’s impact is to update and clarify Michigan’s property tax base and millage rollback rules while maintaining the existing constitutional framework limiting local property tax growth. It is most relevant to assessors, county equalization officials, local treasurers, municipal finance officers, and property owners whose taxable values may be affected by omitted property, exemptions, contamination, or redevelopment.
HB6005 amends MCL 211.34d in the General Property Tax Act, changing the statutory definitions and calculation rules used to determine taxable value, additions, losses, and the millage reduction fraction for local property taxes. It affects local tax administration across Michigan by directing how assessors and county officials account for omitted property, new construction, exempt property returning to the tax roll, replacement construction, environmental remediation, and public services. It also adds a future rule for post-2026 taxes that includes transfer-of-ownership increases in taxable value for millage reduction calculations only, while preserving the existing constitutional limits on local millage rates unless voters approve higher levies.
No committee testimony or vote record was provided, so there is no documented public sentiment in the available materials. From the bill text, the measure appears to be a technical, administrative update to property tax formulas rather than a controversial policy shift. The overall tone is neutral and procedural, suggesting the bill is intended to clarify and standardize tax calculations rather than expand or reduce taxation broadly.
The main potential point of contention is the bill’s treatment of taxable value increases after a transfer of ownership beginning with taxes levied after 2026, because that could affect how much local millage capacity is preserved or reduced after property sales. Another possible issue is the administrative burden on assessors and county equalization officials, since the bill relies on detailed documentation and recalculations for omitted property, exemptions, contamination, and equalization appeals. However, no direct opposition or support statements are available in the provided record.