Hebesatz before/after the 2025 reform
The Hebesatz drops from 540% to 455% (-15.7%).
The Hebesatz drops by 15.7% — on paper a relief signal, but new Grundsteuerwert assessments often absorb the cut.
Mannheim describes the reform as revenue-neutral: the city expects no additional total revenue. Individual properties can still shift noticeably — commercial and high-value locations typically pay more, peripheral single-family homes often less.
The binding figure comes from the municipal Grundsteuerbescheid. The underlying Grundsteuerwert and Messbescheid are issued by the tax office (Finanzamt) — challenges against the assessed value must be filed there within one month, not with the city.