Cook County Property Tax Bills Are Due: Why Do We Pay Property Taxes?

A primer on the role of property taxes in local government budgets and services

Mar. 31, 2026 at 7:11pm

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A minimalist illustration using bold geometric shapes and primary colors to conceptually represent property taxes as an essential revenue source for local governments.Geometric shapes and primary colors illustrate how property taxes fund vital local government services.Chicago Today

The next installments of Cook County property tax bills are due on Wednesday, April 1. This story provides a basic explainer on why property taxes are an important revenue source for local governments like cities, counties, and school districts to fund essential public services that the private sector does not typically provide.

Why it matters

Property taxes have been a source of frustration for many homeowners in Cook County and across Illinois, as bills have risen at twice the rate of inflation over the past three decades. Understanding the fundamentals of how property taxes work and why they are necessary can help provide context around this ongoing issue.

The details

Property taxes are imposed mostly by local units of government on the owners of real estate in a given jurisdiction. They are one of the oldest forms of taxation and provide a relatively steady source of revenue for local governments, unlike more volatile sources like sales and income taxes. Local governments use property tax revenue to fund essential public services that the private sector does not typically provide, such as public education, infrastructure, and public safety. The total amount of property tax revenue a local government must raise in a year is called the property tax levy, which is determined by subtracting other revenue sources from the government's overall budget needs. The property tax rate is then calculated by dividing the levy by the total assessed value of taxable property in the jurisdiction. Properties are usually assessed at a fraction of their full market value, and local governments can provide exemptions to reduce the taxable amount.

  • Property tax bills for Cook County are due on Wednesday, April 1, 2026.

The players

Deborah A. Carroll

A professor of public administration at the University of Illinois Chicago who provided expert commentary on the role of property taxes in local government budgets and services.

Cook County Assessor's Office

The local government agency responsible for determining the assessed value of properties in Cook County, which is a key factor in calculating property tax bills.

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What they’re saying

“Local governments provide a lot of services that the private sector won't provide because it's not profitable to do so. That's why we have intervention of government into the market to provide things that we think are necessary for people to have access to or to consume, like public education.”

— Deborah A. Carroll, Professor of Public Administration, University of Illinois Chicago

What’s next

In future stories, Fox Chicago plans to examine why Cook County and Illinois' property tax system has led to skyrocketing bills for homeowners.

The takeaway

While property taxes can be a source of frustration for many, they play a vital role in funding essential local government services and infrastructure that the private sector does not typically provide. Understanding the fundamentals of how property taxes are calculated and the rationale behind them can help provide context around this ongoing issue.