Illinois vs. Wisconsin Border Property Taxes | Walworth County Rates Are Less Than Half of McHenry County's

If you're weighing Hebron IL real estate or Harvard Illinois real estate against homes a few miles north, you've probably noticed something strange. Cross into Wisconsin and the property tax line on a similar house can drop by thousands of dollars a year. Illinois Wisconsin border property taxes are usually the first gap buyers spot on a listing, but they are not the only cost that changes.

By the end of this guide you'll know the six costs that actually differ, which ones favor Wisconsin, which ones don't, and how to run the comparison on a real house before you write an offer.

Is It Cheaper to Live in Wisconsin Than Illinois?

Often, but not always. Illinois buyers move into Walworth County mainly for lower property taxes, no state estate tax, and lower sales and gas taxes. The trade-offs are higher Wisconsin income tax brackets for some earners, a higher closing transfer fee, and median home prices that can run higher than in Harvard or Hebron.

The 6 Costs at a Glance

Property taxes: Favors Wisconsin. McHenry County's median effective rate is 2.42% versus 1.07% in Walworth County.

Purchase price: Favors Illinois at the median. Harvard's recent median sale price was $288,809 versus $364,826 in Genoa City.

Income tax: Depends on income. Illinois is a flat 4.95%; Wisconsin runs 3.50% to 7.65%.

Estate tax: Favors Wisconsin. Illinois taxes estates over $4 million; Wisconsin has no estate tax.

Sales and gas tax: Favors Wisconsin. Combined sales tax is 8.5% in Harvard versus 5.5% in Walworth County.

Transfer tax: Favors Illinois. $3.00 per $1,000 in Wisconsin versus $1.50 per $1,000 in McHenry County.

6 Cost Differences Between McHenry County and Walworth County

1. McHenry County Property Taxes vs. Walworth County: The Biggest Gap

According to Ownwell's McHenry County data, the county's median effective property tax rate is 2.42%, with Harvard at 2.38% and Hebron at 2.02%. Across the line, Ownwell's Walworth County data shows a 1.07% countywide median and 1.36% in Genoa City.

At the state level the pattern holds. The Tax Foundation puts Illinois' effective rate at 1.88% versus Wisconsin's 1.32%. For a deeper look at how a Wisconsin bill is built, see our guide to Lake Geneva property taxes and homeownership costs.

2. Purchase Price: Wisconsin Is Not Always Cheaper

Here is the cost most "move to Wisconsin" articles skip. Redfin reports a median sale price of $288,809 in Harvard for August 2026. In Genoa City, Redfin's September 2026 median was $364,826. Lower taxes can be offset by a higher price, so compare total monthly cost, not just the tax bill.

3. Income Tax: Reciprocity Changes the Math

Wisconsin and Illinois have an income tax reciprocity agreement, confirmed by the Wisconsin Department of Revenue. If you live in Wisconsin and keep your job in Illinois, Wisconsin taxes your wages, not Illinois.

That cuts both ways. Illinois charges a flat 4.95%. Wisconsin's graduated rates run from 3.50% to 7.65%, per the Tax Foundation. Under Wis. Stat. § 71.06, its two lowest brackets (3.50% and 4.40%) sit below Illinois' flat rate, but its 5.30% and 7.65% brackets sit above it. Income that falls in those upper brackets is taxed at a higher rate than in Illinois, so higher earners can owe more overall. Whether your total bill rises depends on how much of your income lands there. Brackets adjust for inflation each year, so check current thresholds. Run your own numbers with a CPA.

4. Estate Tax: A Big Deal for Luxury Buyers

Illinois taxes estates above a $4 million exclusion, per the Illinois Attorney General's estate tax instructions, with a top rate of 16%, per SmartAsset. Keep an Illinois home and part of your estate can still be taxed there. The Wisconsin Department of Revenue states there is no estate tax for deaths after December 31, 2007. For buyers with significant wealth, this one item can outweigh everything else on this list.

5. Sales Tax and Gas

Avalara lists Harvard's combined sales tax at 8.5%, while Walworth County's combined rate is 5.5%. On $25,000 of taxable spending, that's $750 a year.

At the pump, the Illinois Department of Revenue set gasoline tax at 48.3 cents per gallon from July 1 through December 31, 2026. Wisconsin's state excise is 30.9 cents, per US Gas Gauge.

6. Transfer Tax at Closing: Wisconsin Costs More

This one favors Illinois. Wisconsin charges $3.00 per $1,000 of sale price, per Waukesha County's transfer fee guide. Illinois charges $1 per $1,000 plus McHenry County's $0.25 per $500, per Chicago Title's July 2026 transfer tax list. On a $400,000 sale, that's $1,200 in Wisconsin versus $600 in McHenry County, usually paid by the seller.

Illustrative Scenario: Harvard and Hebron vs. Genoa City

Consider a family comparing two homes, applying each town's Ownwell median effective rate.

Same $400,000 home in both towns: Harvard taxes run about $9,520 a year. Genoa City runs about $5,440. That's $4,080 a year, or $40,800 over ten years. Hebron, at 2.02%, runs about $8,080, still $2,640 a year more than Genoa City.

Median-priced home in each town: Harvard's $288,809 home carries about $6,874 in taxes. Genoa City's $364,826 home carries about $4,962. Taxes drop by $1,912 a year.

The catch: Financing that $76,017 price gap at Freddie Mac's 7.40% average 30-year rate with 20% down adds about $421 a month, or $5,053 a year, plus about $15,203 more cash at closing. In that version, the Wisconsin home costs more.

The lesson: crossing the border saves real money on a comparable home. It does not automatically save money on a more expensive one.

Pros and Cons of Buying Across the Illinois Wisconsin Border

Pros

• Median property tax rates far below McHenry County's (1.07% vs. 2.42% countywide)
• No Wisconsin estate tax
• Lower sales tax and gas tax
• Access to Geneva Lake, Delavan Lake, and the communities in our guide to popular towns in Walworth County

Cons

• Wisconsin income tax can run higher for upper-bracket earners
• Higher transfer fee when you sell
• Median prices in some Walworth towns exceed Harvard and Hebron
• Longer commutes for Chicago-area jobs

How to Compare a Hebron or Harvard Home Against Walworth County

1. Pull both tax bills and due dates. Look up the actual bill for each address through the McHenry County Treasurer's property search and the Walworth County Treasurer's office. McHenry County bills come in two installments, due June 9 and September 9 in 2026. Walworth County's full-payment deadline is January 31, with installment bills due at the end of January and the end of July, as covered in our property tax guide. Note the school district on each bill, since it drives much of the rate.
2. Check exemptions and credits. In Illinois, the General Homestead Exemption cuts assessed value by up to $8,000 in counties bordering Cook, which includes McHenry County. In Wisconsin, the lottery and gaming credit applies only if you own and live in the home as your primary residence on January 1. A seller's bill may include credits you won't get.
3. Match the homes. Compare similar square footage, lot size, and age so price differences don't hide the tax story.
4. Price the mortgage. Calculate principal, interest, and down payment at today's rate for each price.
5. Estimate income tax both ways. Have a CPA run your household income under Illinois and Wisconsin rules.
6. Add insurance, HOA, utilities, and commute. Request quotes for both addresses and time the drive to work.
7. Compare the monthly total. The lower total wins, not the lower tax rate.

Want help running this on real listings? Start with current Genoa City homes for sale, just over the line from Hebron.

The Bottom Line on Illinois Wisconsin Border Property Taxes

Illinois Wisconsin border property taxes create a real, measurable gap, and estate, sales, and gas taxes add to it. But income tax, transfer fees, and purchase price can narrow or erase the savings. Compare full monthly cost on matched homes, and you'll know whether crossing the line pays for your household.

Ready to see the numbers on a specific home? Contact Legendary Real Estate Services for a side-by-side cost comparison on any Walworth County property.

Frequently Asked Questions

Are property taxes lower in Wisconsin than in Illinois?

Generally, yes. The Tax Foundation lists Illinois' effective property tax rate at 1.88% and Wisconsin's at 1.32%. Near the border, Ownwell data shows McHenry County's median effective rate at 2.42% versus 1.07% in Walworth County. Rates still vary by town and school district, so always check the actual bill for the specific property.

If I live in Wisconsin and work in Illinois, which state taxes my wages?

Wisconsin does. The two states have a reciprocity agreement, so Illinois does not tax wages earned by Wisconsin residents. Reciprocity covers employee wages only. Rental income or gains from selling Illinois property can still be taxed by Illinois, and Wisconsin may allow a credit for that tax.

Does Wisconsin have an estate tax?

No. The Wisconsin Department of Revenue states there is no estate tax for decedents dying after December 31, 2007. Illinois taxes estates above $4 million, with rates reaching 16% at the top. Federal estate tax rules apply in both states.

Is it cheaper to buy a home in Genoa City or Harvard, Illinois?

It depends on the home. Redfin reported a higher recent median sale price in Genoa City than in Harvard, but Genoa City's median effective property tax rate is lower. On comparable homes, Wisconsin usually wins on annual taxes. On a more expensive Wisconsin home, higher mortgage payments can cancel out the tax savings.

How do Hebron property taxes compare to Genoa City?

Ownwell data puts Hebron's median effective property tax rate at 2.02% and Genoa City's at 1.36%. On a $400,000 home, that works out to roughly $8,080 a year in Hebron versus $5,440 in Genoa City, a gap of about $2,640. The actual bill depends on the parcel's assessment and school district.

When is my first property tax bill due after buying in Walworth County?

Walworth County's full-payment deadline is January 31, and installment bills split the payment between the end of January and the end of July. At closing, taxes for the sale year are prorated between buyer and seller on the closing statement.

Who pays the real estate transfer tax in Wisconsin?

The Wisconsin transfer fee is $3.00 per $1,000 of sale price and is imposed on the seller (the grantor) under Wisconsin law. In McHenry County, the state and county transfer taxes total $1.50 per $1,000. Buyers feel this difference mainly when they sell later.