Cook County Treasurer's Study Reveals Causes of Soaring Property Taxes

Report finds property taxes in Cook County jumped 182% over 30 years, outpacing inflation and wage growth

Mar. 30, 2026 at 12:50pm

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An abstract illustration using simple geometric shapes and primary colors to conceptually depict the rapid rise in property taxes in Cook County, Illinois over the past 30 years.A visual representation of the economic forces driving Cook County's property tax crisis.Chicago Today

A new 30-year analysis by the Cook County Treasurer's office has uncovered the key drivers behind the skyrocketing property taxes that have burdened many Cook County residents in recent years. The study found that property taxes in the county increased by 182% from 1995 to 2024, far outpacing the 91% rise in inflation and 161% increase in wages over the same period. Investigators attribute this surge to unchecked government spending and loopholes that allow local authorities to circumvent tax limitation laws.

Why it matters

Rapidly rising property taxes have become a major source of financial strain for many homeowners in Cook County, forcing them to dedicate an ever-growing share of their income towards these assessments. This study provides crucial data and analysis to understand the root causes of this problem, which has significant implications for the economic well-being of residents and the overall affordability of living in the region.

The details

The Cook County Treasurer's office found that from 1995 to 2024, property taxes in the county jumped from $12 billion to $19.2 billion - a 182% increase. This far outpaced the 91% rise in inflation and 161% growth in wages over the same period. Investigators attribute this surge to unchecked government spending, as the 562 different local authorities in Cook County continually demand more funding each year. While state laws like the Property Tax Limitation Law (PTELL) were intended to cap property tax hikes, the report found numerous loopholes that allow governments to circumvent these restrictions, such as referendums for new spending initiatives and the lack of limits on tax increases in special districts like Tax Increment Financing (TIF) zones. The study also noted that K-12 public school systems now account for nearly 55% of the total property tax burden in the county.

  • The Cook County Treasurer's office completed this 30-year analysis in March 2026.
  • The Property Tax Limitation Law (PTELL) went into effect in Cook County in 1994.

The players

Maria Pappas

The Cook County Treasurer who oversaw this 30-year analysis of skyrocketing property taxes in the region.

Ben Joravsky

A longtime columnist for the Chicago Reader who has extensively criticized the use of Tax Increment Financing (TIF) districts as a "slush fund" for local governments.

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What they’re saying

“The 30-year study really pinpoints what's wrong. So the biggest problem is that there's just spending like drunken sailors. I mean, so every year, all 562 governments come into Cook County, and they say: 'You know what? This is how much money I want,'”

— Maria Pappas, Cook County Treasurer

“Tax increment financing districts have gone up 1,000%”

— Maria Pappas, Cook County Treasurer

What’s next

Pappas said her office's report is intended to spur action at the state level to close the loopholes that have allowed local governments to circumvent property tax limitation laws. She emphasized that the solution must come from cutting spending at the local level, rather than seeking more funding from the state, which she said has no additional money to give.

The takeaway

This comprehensive study by the Cook County Treasurer's office provides crucial data and analysis to understand the root causes behind the region's skyrocketing property taxes, which have become a major financial burden for many homeowners. The findings highlight the need for state lawmakers to reform the laws governing local government spending and taxation in order to rein in these spiraling costs.