Walworth County property taxes are billed once a year and can be paid in full by January 31 or split into two installments due January 31 and July 31. The first installment goes to your local municipal treasurer; the second installment and anything delinquent go to the Walworth County Treasurer. Miss either installment deadline and the full remaining balance becomes delinquent, with interest and penalties starting February 1.
When Your Payment Is Due
You have two ways to pay.1Walworth County, WI. Tax Due Dates
- Pay the full annual bill on or before January 31 to your local municipal treasurer.
- Pay the first installment on or before January 31 to your local municipal treasurer, then the second installment on or before July 31 to the Walworth County Treasurer.
If you choose the installment route and miss either deadline, you lose the installment option entirely. The remaining balance becomes delinquent immediately and the full amount comes due with interest and penalties.1Walworth County, WI. Tax Due Dates
Mailed payments count as on time if the envelope is properly addressed, postage is prepaid, and the postmark is dated before midnight on the due date.2Wisconsin State Legislature. Wisconsin Code 74.69 – Timely Payment by Mail Dropping an envelope in a collection box on January 30 is not the same as a January 30 postmark. If the post office stamps it February 1, you are delinquent.
Where and How to Pay
For the January 31 payment (whether full bill or first installment), you pay your local municipal treasurer. Each town, village, and city within Walworth County collects its own first-installment payments, so check with your local clerk for accepted methods and office hours.
For the second installment and any delinquent amounts, mail your check or money order to the Walworth County Treasurer at P.O. Box 1001, Elkhorn, WI 53121.3Town of East Troy. Property Tax Deadline Write your parcel number on the memo line so the payment is applied to the correct property. In-person payments are accepted at the Walworth County Government Center in Elkhorn during regular business hours.
Online payments go through the county’s payment portal. Fees vary by method and have recently run around $0.25 for e-checks, $3.50 flat for debit cards, and 2% of the total for credit cards.3Town of East Troy. Property Tax Deadline Fees are set by the processor and can change, so confirm the current amount at the time of payment. After submitting online, save the confirmation number as your receipt until the payment clears.
What Happens If You Pay Late
Delinquent Walworth County property taxes carry a combined 1.5% monthly charge, made up of 1% interest and 0.5% penalty, running from February 1 until paid in full.1Walworth County, WI. Tax Due Dates Any fraction of a month counts as a full month. One day into a new month triggers the full month’s charge. By August the accumulated interest and penalty reaches 10.5% of the delinquent balance.
Delinquent real property taxes are paid to the county treasurer, not your local municipality.4Wisconsin State Legislature. Wisconsin Code 74.11 – Delinquent Taxes If the debt stays unpaid, the county can issue a tax certificate against your property under Chapter 75 of the Wisconsin Statutes. The certificate functions as a lien. If payment still doesn’t come, it can eventually lead to a tax deed transferring ownership of the property to the county.
You can redeem the property at any point before a tax deed is recorded by paying the county treasurer the unpaid taxes plus all accumulated interest, penalties, and fees.5Wisconsin State Legislature. Wisconsin Code 75 – Tax Redemption and Deeds Partial payments of at least $20 are accepted toward redemption, though they do not extend the deadline. The county must publish notice of unredeemed properties at least six months before the redemption period expires, so warning does come. By that point, however, the total owed has grown well past the original bill.
How Your Bill Is Calculated
Your local assessor sets the assessed value of your property under Wisconsin Statutes Chapter 70.6Wisconsin State Legislature. Wisconsin Statutes Chapter 70 – General Property Taxes Wisconsin law requires real property to be valued at full market value — the price it would bring in a private sale between a willing buyer and seller.7Wisconsin State Legislature. Wisconsin Statutes Taxation 70.32 The assessor relies on recent arm’s-length sales of comparable properties along with other factors recognized in professional appraisal practice. Wisconsin targets 100% of market value rather than a fraction of it.
Your tax amount is the assessed value multiplied by the combined mill rate. That combined rate bundles the county, your municipality, your school district, and the Gateway Technical College district into a single number. A mill rate of 0.015 means $15 in tax for every $1,000 of assessed value. Because each jurisdiction sets its own share during annual budget meetings, the combined rate varies depending on where in the county your property sits.
Credits That Lower What You Owe
Two statutory credits under Section 79.10 of the Wisconsin Statutes are applied directly on your tax bill, so you don’t owe the full gross amount.8Wisconsin Department of Revenue. Property Tax Relief Credits
The Lottery and Gaming Credit is available if you are a Wisconsin resident and the property is your primary home. For the 2025–2026 cycle, the maximum credit value is $27,000 per parcel. The First Dollar Credit applies to any parcel with a real property improvement on the land, whether or not it’s your primary residence. The maximum value for 2025–2026 is $9,000 per parcel.9Wisconsin Department of Revenue. 2025-26 Lottery and First Dollar Credit – Maximum Credit Values Both appear as line-item reductions on your bill. Your municipality handles the calculation, so no separate application is needed. The actual amount depends on your property’s value and the allocation formula, and most owners will see amounts well below the listed maximums.
Two other credits are claimed on your state income tax return rather than through the local treasurer. The Wisconsin Homestead Credit is income-based and may be available if you or your spouse earned income during the year, are 62 or older, or have a disability. You claim it on Schedule H or H-EZ.10Wisconsin Department of Revenue. DOR Homestead Credit The Veterans and Surviving Spouses Property Tax Credit equals the full amount of property taxes paid on your principal home if you are a veteran with a 100% service-connected disability rating or rated individually unemployable, or an eligible unremarried surviving spouse. Certification runs through the Wisconsin Department of Veterans Affairs.11Wisconsin Department of Revenue. Veterans and Surviving Spouses Property Tax Credit – Qualifications
Challenging Your Assessment
If you believe your assessed value is too high, your first formal step is the local Board of Review. Every municipality holds Board of Review meetings after the assessment roll is completed, and the timing requirements are strict.
You must notify the Board of Review clerk, in writing or verbally, at least 48 hours before the board’s first scheduled meeting that you intend to file an objection.12Wisconsin State Legislature. Wisconsin Code 70.47(7) – Objections to Valuations You then submit a written objection form (state form PA-115A) within the first two hours of the board’s first meeting. If you missed the 48-hour notice, you can request a waiver during those same first two hours by showing good cause. The board has discretion to extend deadlines up to five days into the session under extraordinary circumstances, but counting on that exception is risky.
At the hearing, you must present evidence supporting your claimed value and disclose all assessable property you own in the district, under oath. The strongest evidence is typically recent sales of comparable properties nearby. One restriction worth knowing: if you refused a reasonable written request from the assessor to view the exterior of your property, you lose the right to appear before the board at all.12Wisconsin State Legislature. Wisconsin Code 70.47(7) – Objections to Valuations If you own both the land and improvements, you must object to the combined value rather than challenging land or building separately.
If you’d rather skip the Board of Review and go straight to circuit court, file a waiver request (form PA-813) with the clerk along with your objection and 48-hour notice. You then have 60 to 90 days from receiving the waiver notice to file your court action, depending on the statute you proceed under.13Wisconsin Department of Revenue. DOR Board of Review – Filing Objections and Forms
Looking Up Your Bill and Parcel
Walworth County hosts its property data through the Ascent Land Records system, reachable from the county website’s property tax page.14Walworth County, WI. Parcel Information You can search by parcel identification number, owner’s last name, or street number. The county recommends using one search filter at a time and selecting the correct municipality to narrow results.15Village of East Troy. Tax Payment Directions
Within each property profile you can view current tax obligations, historical billing, assessment trends, and the breakdown between land value and improvement value. Digital copies of your tax bill are available for download, and the portal provides the forms you need to update your mailing address.