You've done the hard part. You found the place. You negotiated the price. Your mortgage is lined up.

And then, somewhere in the stack of closing documents, a number appears that nobody really prepared you for.

It's called the real estate transfer tax. And depending on where you're buying, it can add thousands of dollars to what you need to bring to the table.

This isn't a reason to panic. But it is a reason to know.

What Is It, Exactly?

A real estate transfer tax is a one-time fee charged by a government — state, county, or municipal — when a property changes hands. Think of it as the cost of officially recording that a home now belongs to you instead of someone else.

Illinois has one. Cook County has one. And many of the cities and villages where you're likely buying have one of their own on top of that.

They're calculated as a percentage of the sale price, typically expressed in dollars per thousand (or per five hundred) of value. They're paid at closing. And unlike your mortgage payment or your property taxes, they don't spread out over time. They're due all at once, the day you get your keys.

Who Pays — and That's Where It Gets Interesting

Here's what a lot of buyers don't realize: who pays the transfer tax isn't universal. It depends entirely on where you're buying. In some places, it's the buyer's cost. In others, it falls on the seller. In some transactions, both sides pay a portion.

In practice, this affects your bottom line differently depending on which side of the table you're on. And if you're doing both — selling in one place to buy in another — you may be paying transfer taxes twice.

Here's how it breaks down across the markets I work in most.

The State of Illinois Illinois charges $0.50 per $500 of sale price, and this one is customarily paid by the seller. On a $600,000 sale, that's $600. Not the biggest line item, but it's there.

Cook County Cook County adds $0.25 per $500, also customarily paid by the seller. On that same $600,000 sale, add another $300.

City of Chicago Chicago's transfer tax is where it gets more substantial. The city charges a combined $10.50 per $1,000 of sale price — split between buyer and seller. The buyer pays $7.50 per $1,000 (that's 0.75% of the purchase price). The seller pays $3.00 per $1,000 (0.30%).

On a $700,000 condo in Lincoln Square, the buyer's share is $5,250. That's real money that needs to be in your closing funds.

A note on Chicago's recent history: in March 2024, Chicago voters considered a ballot measure called "Bring Chicago Home" that would have created a tiered transfer tax structure, lowering the rate on homes under $1 million while significantly raising it on properties above that threshold. The measure was defeated. The current flat rate structure stands. That said, similar proposals have a way of returning, so if you're buying or selling at the higher end of Chicago's market, it's worth keeping an eye on.

Evanston Evanston is seller-paid and uses a graduated structure. Sales up to $1.5 million are taxed at $5 per $1,000. Sales between $1.5 million and $5 million step up to $7 per $1,000. And sales above $5 million are taxed at $9 per $1,000.

For a seller closing on a $900,000 home in East Evanston, that's $4,500 to the city, on top of the state and county amounts.

Wilmette Wilmette's transfer tax is paid by the buyer, at $3 per $1,000. On a $1.2 million home near the Metra, that's $3,600 that the buyer brings to closing.

Winnetka, Kenilworth, and Glencoe Good news for buyers in these three villages: there is no municipal transfer tax. You'll still have the state and county amounts if applicable, but no additional village layer.

Highland Park Highland Park follows the seller-pays model at $5 per $1,000 — the same rate as Evanston's base tier.

How This Affects Your Buying Power

The transfer tax matters because it's a cash cost at closing. It doesn't get rolled into your mortgage. It doesn't get paid out of your sale proceeds before you see them (well, the seller's portion does, but you feel it in your net). It comes out of the funds you wire to the title company.

For buyers, this means your closing cost estimate needs to account for it from day one. If you're buying in Chicago and your agent or lender didn't flag the city's transfer tax in your early planning conversations, you could be short at the table.

For move-up buyers — people who are selling one home to buy another — the math compounds. You might be paying transfer taxes as a seller in one municipality and again as a buyer in another. Both amounts need to be modeled before you know what your real number looks like.

This is exactly the kind of calculation your lender should be running with you early in the process. If you haven't walked through a full closing cost estimate yet, that's the first conversation to have. I work closely with our lenders at Key Mortgage, and this is the kind of detail they builds into the picture from the start.

A Few Other Things Worth Knowing

Exemptions exist, but they're specific. Most municipalities have exemptions for certain transfers — divorces, estate transfers, gifts between family members, and others. Don't assume you qualify, but don't assume you don't either. Ask your real estate attorney.

You have a real estate attorney at closing. In Illinois, both buyers and sellers are represented by attorneys at closing. This is standard here, unlike many other states. Your attorney will review the transfer tax amounts and make sure the right party is paying the right amount. But the time to understand the cost is before you're under contract, not after.

The rates can change. As Evanston's tiered structure shows, municipalities do revisit these rates. If you're buying in a city where transfer tax proposals have been in the news, it's worth knowing where things stand at the time of your purchase.

The Bottom Line

Transfer taxes are not a reason to avoid a neighborhood or a property. But they are a real closing cost — one that varies significantly from one address to the next, and one that deserves a clear-eyed look early in your planning.

If you're thinking about a move anywhere on the North Side or the North Shore, let's talk through the full picture before you fall in love with a specific address. The numbers shouldn't be a surprise. They should be part of the plan.