Why It Matters
Three ballot initiatives moving forward in Montana aim to cap annual property tax increases at 2%, a proposal that could reshape how local governments and school districts fund essential services. Critics warn the measures would force jurisdictions to raise income taxes or cut programs, while supporters say Montana homeowners need relief after years of surging property values. The outcome could set a precedent for property tax policy across the Mountain West, with Idaho facing similar pressures from rising home values.
What Happened
Former Republican state legislator Matt Monforton has advanced two constitutional amendments that cleared the state for signature gathering. Constitutional Initiative 129 would cap annual valuation increases on primary residences at 2% unless the home changes ownership or undergoes improvements. Constitutional Initiative 130 extends the same 2% cap to all real property, including commercial, industrial, and agricultural land.
A third proposal from state Sen. Wylie Galt would impose a similar 2% cap but exempts school district mills and levies, allowing voters to approve funding above the ceiling. That measure remains under review by the attorney general’s office.
Each initiative requires more than 60,000 qualified signatures from Montana voters by June 19 to appear on the November ballot. The proposals come after the Montana Legislature passed changes last year that lowered property tax bills for most homeowners by shifting rates and imposing a tax on second homes owned by out-of-state residents.
By the Numbers
Montana currently allows local governments to raise property taxes annually by the prior three-year average inflation rate, capped at 4%. The Department of Revenue assesses residential properties at estimated market value, which has climbed sharply in recent years. Under the proposed 2% cap, a home valued at $400,000 could see its assessed value increase by no more than $8,000 per year, regardless of market conditions.
Signature gatherers have until mid-June to collect 60,000-plus valid signatures for each initiative. Montana’s property tax system generates revenue for counties, cities, school districts, and special districts that fund fire protection, libraries, and infrastructure.
Zoom Out
Property tax cap proposals have gained traction across conservative states facing rapid home price appreciation. California’s Proposition 13, enacted in 1978, capped annual assessment increases at 2% and became a model for tax limitation movements nationwide. Critics of such measures point to California’s chronic underfunding of schools and infrastructure as a warning.
Steven Sheffrin, a property tax expert and professor emeritus at Tulane University, told Montana Free Press that caps never occur in a vacuum. If demand for services remains, governments will seek alternative revenue sources, including higher income taxes or fees. School advocates in Montana warn that the initiatives could force districts to lobby for income tax increases or cut programs, shifting the burden from property owners to wage earners.
What’s Next
Signature gathering continues through June. If any of the initiatives qualify for the ballot, Montana voters will decide in November whether to amend the state constitution. Local governments and school districts are monitoring the campaigns closely, preparing for potential budget shortfalls if the measures pass. Galt’s proposal awaits final review and language revisions before signature collection can begin.
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