If you've never sold a home in Chicago before, there's a line on your closing statement that's going to catch your eye — and possibly catch you off guard.
It's called the property tax proration, and on an average Chicago home, it can mean thousands of dollars coming straight out of your net proceeds at closing.
It's not a fee. It's not a penalty. It's just how Cook County property taxes work. But if no one walks you through it before you list your home, it can feel like a nasty surprise on the most important financial day of the year.
Here's the breakdown.
Cook County Property Taxes 101: We Pay in Arrears
Unlike most bills you're used to paying, Cook County property taxes are billed in arrears. That means the tax bill you receive and pay in 2026 is actually for 2025.
This is completely normal in Cook County. It's how it's always worked. But it creates a unique situation when you sell your home.
Think about it: if you sell your home in April 2026, you've lived in the home for roughly four months of 2026. But you haven't been billed for any of those months yet — because that bill won't arrive until 2027.
Someone still has to pay those taxes. And since you're the one who lived there, it shouldn't fall on the buyer.
That's where the proration comes in.
What This Means at Closing: You Owe the Buyer a Credit
At closing, the seller credits the buyer for every month of property taxes that haven't been billed yet. The logic is straightforward: since the buyer will eventually receive the tax bill that covers the period when the seller still owned the home, the seller reimburses the buyer for their share upfront.
That credit comes directly out of the seller's net proceeds.
Let's say you sell your Chicago home in April. Your annual property tax bill is $10,000.
You've owned the home for roughly 4 months of the current tax year. At closing, you credit the buyer for those 4 months of taxes you haven't been billed for yet.
That's approximately what comes out of your proceeds — before you've ever seen a bill for it.
The exact amount depends on your property's tax bill, the time of year you close, and one more factor that most sellers never hear about until it's too late.
What Almost No One Explains: The Proration Rate Is Negotiable
Here's where it gets really interesting.
The proration credit isn't just calculated based on last year's tax bill — it's calculated as a percentage of last year's tax bill. That percentage is called the proration rate, and it's written directly into the purchase contract.
In a typical Chicago transaction, the proration rate falls somewhere between 100% and 120% of the prior year's taxes. Common rates include 100%, 105%, 110%, and 120%.
Why the range? Because property taxes can change year to year. Assessments get reassessed. Tax rates shift. The proration rate is essentially an estimate — a negotiated best guess at what this year's actual taxes will be.
This is one of the most overlooked negotiation points in a Chicago real estate transaction. It's not about who "wins" — it's about both sides understanding the math and agreeing on a rate that's fair based on where taxes are likely headed.
This Is Why Your Team Matters
The property tax proration isn't complicated once someone explains it to you. The problem is that too many sellers don't hear about it until they're sitting at the closing table, staring at a number they didn't expect.
That's not how it should work.
At Vesta Preferred, we walk every seller through the tax proration math before we ever list the home. It's part of our listing consultation — not an afterthought. You should know exactly what to expect from your net proceeds before you sign anything.
And when it's time to close, our partners at Liberty Title & Escrow handle the calculation, the paperwork, and the closing day execution. Their team makes sure every number is right, every document is clean, and every question gets answered before you pick up a pen.
No guessing. No closing day shocks. Just a clean, protected net.
That's what "know before you close" actually means. Not a slogan — a standard.
