How big is the tax credit actually going to be? That question lands on nearly every closing table in Champaign, usually somewhere between the final walkthrough and the moment someone slides a settlement statement across the table. Buyers assume the number comes straight off the bill they can look up online. Sellers assume the same thing. Neither assumption is quite right, and this particular closing season the gap between assumption and reality is wider than usual.
Illinois pays property taxes a year behind. The bill that lands in a mailbox this year covers last year's assessment, which means anyone selling a home right now owes the buyer credit for months of taxes that haven't been billed yet at all. That credit is not a formality. It's a negotiated number built on an estimate, and this year the estimate has to stretch further than it has in a while.
What The Bill In Your Mailbox Doesn't Cover
Champaign County mailed real estate tax bills on May 1. The first installment was due June 3, and the second comes due September 3, just a few weeks out from today. That bill covers tax year 2025, the assessment as it stood back on January 1 of last year.
Anyone closing on a home this month is settling accounts for time the seller hasn't been billed for at all. The convention that fills that gap is a proration credit: the seller hands the buyer cash at closing equal to an estimated share of taxes accrued since the last bill, calculated as a percentage of days owned during the current tax period. Outside Cook County, that estimate is typically built on the most recent known bill multiplied by around 105 percent, a cushion meant to account for the fact that levies almost always creep upward year over year.
A 5 percent cushion works fine in a normal year. It stops working as cleanly the moment a taxing body's levy jumps by triple that amount, which is exactly what happened here.
The Levy Increase Sitting Inside This Year's Bill
The City of Champaign extended $33,931,335 in corporate and special purpose property taxes for 2024. For 2025, the city levied $39,269,200, an increase of 15.73 percent approved at a public hearing in December. That levy is what's baked into the tax year 2025 bill now sitting in installments due this June and September, the same bill every proration credit at a Champaign closing this cycle is estimating from.
Champaign wasn't alone. The county board adopted its own tax levy that same budget season, on November 20, and just up the road, Mahomet posted a notice projecting a property tax increase of more than 44 percent for the coming year. Mahomet resident Mike Seten told WCIA the notice "really alarmed" him after he saw it on Facebook. Village officials pushed back on the framing, pointing out that Illinois law requires a public notice any time a taxing body's total revenue rises more than 5 percent, so a large percentage on a notice doesn't always translate to an equally large jump on an individual bill. The mechanism behind the notice matters less here than what it signals: this was an unusually active levy season across several taxing bodies at once, not a one-off increase in a single district.
For a seller, that means the standard 105 percent proration cushion may not fully cover what the actual tax year 2026 bill turns out to be once it's issued next spring. For a buyer, it means the credit received at closing this year is worth double-checking rather than accepting at face value. Most Illinois purchase contracts allow for a reproration agreement if the real bill, once issued, comes in materially different from the estimate. That clause exists precisely for years like this one.
The Exemption Number Half The Internet Gets Wrong
Search for the Champaign County homestead exemption and you'll find guides confidently stating it reduces assessed value by $8,000 or even $10,000. Champaign County's own Assessment Office says otherwise: the General Homestead Exemption reduces equalized assessed value by $6,000, full stop, for an owner-occupied primary residence as of January 1 of the assessment year.
The confusion likely comes from Illinois's collar counties, where a higher exemption amount does apply, and from Cook County's separate rules. Champaign isn't a collar county. The $6,000 figure is the one that shows up on an actual bill here, and at the county's effective tax rate of roughly two percent, that exemption is worth something in the neighborhood of $124 a year, not the few hundred dollars some of those guides imply.
Why this matters at closing: the exemption doesn't automatically transfer with the deed. A new owner has to file for it themselves with the County Assessment Office, and missing that step means paying full freight on next year's bill for a savings that was sitting right there for the taking. It's a small line item, but it's the kind of detail that separates a closing that goes smoothly from one where a buyer calls six months later wondering why their bill looks higher than expected.
The Window Sellers Forget They Still Have
Every assessment year in Champaign County opens a formal appeal window, and the one for tax year 2026 is open right now, running from July 1 through September 10. That means anyone reading this in mid-August still has a few weeks left to challenge this year's assessment before it locks in.
It's worth being precise about which bill that window affects. Appealing now doesn't change the installments due this June and September, since those cover tax year 2025 and that assessment cycle already closed months ago. What an appeal filed by September 10 does affect is the assessment that becomes next year's bill, the one due in 2027, and by extension the proration math on any closing that happens between now and then. For anyone planning to list a home later this year or in early 2027, a successful appeal filed this fall is the single most direct way to shrink the tax number a buyer will eventually be crediting against.
The process itself isn't complicated. A homeowner starts with an informal review through their township assessor, then files a complaint form with the Board of Review if that doesn't resolve things, using comparable sales, photos of the property's actual condition, or a professional appraisal as evidence. The Board typically issues a decision within 60 to 90 days.
A Short FAQ
Does this year's levy increase mean my tax bill definitely went up 15.73 percent? No. The city's levy is the total dollar amount it collects across every parcel in its boundaries, not a flat percentage applied to each individual bill. Your actual increase depends on your property's assessed value and every other taxing district layered onto your parcel, including school district, township, park district, and library.
What happens if the actual tax bill comes in higher than the estimate used at closing? Most Illinois contracts allow for a reproration once the real bill is issued. If the estimate used a 105 percent cushion and the actual increase came in well above that, either party can revisit the number under the terms already written into the contract.
Does any of this apply differently for new construction? Yes, in one specific way. A newly completed home or a major addition triggers a supplemental tax assessment based on the increase in value, prorated for the portion of the year the improvement existed. That's a separate calculation from the arrears credit discussed here, but it follows the same underlying logic: taxes get billed later than the value they're based on, so someone always ends up settling the gap at closing.
Should I apply for the homestead exemption if I just bought a home this year? Yes, as soon as you can confirm you occupied the property as your primary residence on January 1 of the assessment year in question. It isn't automatic, and the previous owner's exemption doesn't carry forward with the deed.
None of this changes whether a home is worth buying or selling this year. It changes what the numbers on the closing statement actually mean, and whether they were built on the county's real figures or on a guide that got the exemption amount wrong. If you're weighing a sale or a purchase in Champaign this fall and want the math walked through against your specific parcel, Kristen Dilley is glad to sit down and go through it with you. Schedule a consultation.
