Bourbonnais Property Taxes: Why Bills Rise Despite a Flat Multiplier

Every fall, the Illinois Department of Revenue sends Kankakee County a single number meant to keep property assessments honest across the state. It's called the equalization factor, and the Illinois Department of Revenue's 2022 release and its 2025 final release report a factor of exactly 1.0000 for 2022, 2024, and 2025 taxes, with 2025 taxes payable in 2026. The number gets published in a legal notice, survives a public hearing, and does exactly what it's designed to do: nothing.

Meanwhile, the actual dollar amount collected from a typical Bourbonnais property owner has climbed every year during that same stretch. If you're comparing Bourbonnais to another Kankakee County town, or comparing the county itself to wherever you're moving from, the gap between the number that's frozen and the number that isn't tells you more than the sale price on the listing ever will.

The Number That's Supposed to Keep Things Fair

The Illinois Department of Revenue's Township Assessor Introductory Course explains that Illinois law requires property to be assessed at one third of market value. Each year, the Department of Revenue checks whether a county's assessors are hitting that mark by comparing actual sale prices against assessed values over the prior three years. If a county lands close to 33.3%, the equalization factor stays at 1.0000. If assessments run high or low, the factor adjusts to correct it.

Kankakee County keeps landing close to the target. Assessments have measured between roughly 33.1% and 33.3% of market value across every cycle the state has reported going back several years. That consistency is why the multiplier hasn't budged. It isn't a sign that taxes are under control. It's a compliance check confirming that assessors countywide are doing their job uniformly, and it has almost nothing to do with what happens to your bill next spring.

So What Actually Moves the Bill

The real driver sits one level down, with the taxing bodies that request money each year, capped by a state law known as PTELL, the property tax extension limitation law. Shaw Local reports that under PTELL, a taxing body's levy can grow by whichever is smaller: 5%, or the prior year's change in the consumer price index. New construction gets added on top of that cap, as the Illinois Department of Revenue explains.

Bourbonnais Elementary School District 53 shows how this plays out year over year. In the levy cycle covering 2023 taxes, the district requested a 6.5% increase, matching that year's CPI, but the law capped what it could actually collect closer to 5%, bringing the actual extension to about $16.53 million. The next cycle, covering 2024 taxes, CPI had cooled to 3.4%, and the district ended up collecting about $17.21 million. For 2025 taxes, with CPI down to 2.9%, the district requested just under 5% again and expects to collect roughly $17.77 million.

That's a nearly 7.5% increase in what the school district alone collected in property taxes across just two tax cycles, while the county's equalization factor sat unchanged at 1.0000 the entire time. District officials have been candid about the logic behind the pattern: because new property values are still estimates when the levy is filed, districts request the maximum allowed so no available revenue gets left unclaimed. Bourbonnais Superintendent Adam Ehrman has made the same point another way, noting that a levy request that undershoots one year lowers the base every year after it, so a small miss compounds over decades.

Property tax dollars fund a majority of District 53's operating budget, and that pattern isn't unique to one district. It repeats across the village's park district, fire protection district, and the county itself, each requesting its own capped increase every year, each layering onto the same bill.

Why Your Effective Rate Looks Higher Than the Village Suggests

Two separate services that track Kankakee County parcels put the median Bourbonnais property tax bill within about $150 of each other, at $5,425 and $5,570 a year, even though they disagree by nearly $36,000 on what the median home is actually worth, $242,600 versus $206,874. That's a useful tell. The tax bill is the more stable number of the two, because it's anchored to a levy process that moves in predictable, capped increments, not to whatever a home valuation model estimates in a given month.

Those bills work out to an effective rate somewhere between 2.2% and 2.8% of home value, depending on which methodology you use. For comparison, Illinois' statewide average runs somewhere between 1.9% and 2.3%, and the national median sits closer to 1.0%. Zoom out to the whole county and the median effective rate climbs to about 3.07%, with real spread inside that figure: Kankakee city runs the highest in the county at roughly 4.53%, while Wilmington runs the lowest at about 2.56%. Bourbonnais sits in between, closer to the county's low end than its high end, but still well above what a buyer moving from most other states would expect.

The Same Village, Different Tax Stack

Here's the part that catches people off guard during a transaction. Bourbonnais isn't one taxing district, it's several overlapping ones, and which set applies to a given parcel depends on exactly where that parcel sits. Most of the village feeds into Bourbonnais Elementary School District 53, which in turn feeds Bradley-Bourbonnais Community High School District. But a separate attendance area within the same village, centered around St. George Catholic Community School District 258 on East Center Street, runs its own levy entirely apart from District 53's.

Fire protection is another part of the tax stack. As recently as the 2022 general election, Bourbonnais Fire Protection District trustees were asking voters to approve a tax increase for the fifth time since March 2020, after four previous attempts had failed. A school levy climbs on schedule almost every year under PTELL, while two houses a few blocks apart, sitting under different combinations of school and fire taxing bodies, can carry meaningfully different bills even at the same assessed value.

What to Check Before You Write an Offer

None of this is tax advice, just the numbers worth pulling before a number on a listing page becomes a number on your escrow statement.

• Pull the parcel's actual current tax bill and its taxing district breakdown from the Kankakee County Treasurer's office, not an automated estimate built off aggregate averages.
• Confirm which elementary and high school district codes attach to that specific parcel. It can differ block to block inside the same village.
• Ask whether a park district, fire protection district, or special service area shows up as its own line on the bill.
• Remember that assessment notices go out each spring, and the window to appeal an assessed value is short once it's published, so timing matters if you plan to contest one.

A Few Questions Worth Asking

Does a lower sale price in Bourbonnais mean a lower monthly payment than a pricier suburb closer to Chicago? Not automatically. A lower purchase price can still carry a higher effective tax rate once you account for which school and fire districts apply, so it's worth running the actual tax bill, not just the sticker price, before comparing two towns.

Will my tax bill keep climbing every year no matter what? It depends on which taxing bodies apply to the parcel and how their levies change.

Why do two similar homes in Bourbonnais have different tax bills? Usually because they sit under different combinations of overlapping taxing bodies, most often a different school attendance boundary, even when they're assessed at similar values.

If you're weighing a move to Bourbonnais or comparing it against another Kankakee County town, the sale price is only half the math. The other half lives in the taxing district codes attached to a specific parcel, and that's the kind of detail worth checking before you fall for a listing. Annie Mitchell can pull the actual tax history and district breakdown on any property you're considering and walk through what it really means for your monthly number. Schedule a free consultation to get the full picture before you write an offer.