Oshkosh Property Tax rates for 2026 settle at $7.77 per $1,000 of assessed value in the city and $3.41 per $1,000 for Winnebago County, while the Oshkosh Area School District levy sits near $7.81 per $1,000, reflecting the latest municipal budget decisions. The Oshkosh tax assessment process begins when the City Assessor posts valuation data on the online property tax portal, and homeowners can verify figures through the Winnebago County Treasurer’s search portal at https://ascent.co.winnebago.wi.us/LandRecords. Payment deadlines for 2026 require the first installment by January 31 and the second by September 5, with the Treasurer’s office at 112 Otter Ave offering extended hours and payment plans. Seniors seeking Oshkosh tax exemptions should consult the Wisconsin Homestead Credit guidelines and contact the city finance department at (920) 236‑5070 for assistance.
Oshkosh Property Tax appeals follow a 30‑day window after the assessment notice, and appeals are filed with the Wisconsin Board of Review using evidence from the Oshkosh real estate tax records. Taxpayers interested in a property tax calculator for Oshkosh, WI can use the state‑approved estimator to project liabilities before the due date. Refund eligibility applies when overpayment is confirmed, and lien information is accessible through the Winnebago County Register of Deeds at https://www.co.winnebago.wi.us/register-deeds/access-real-estate-records-winnebago-county-wisconsin. For any questions, the Oshkosh city tax collector can be reached at (920) 232‑3420, and the Wisconsin Department of Revenue offers additional property tax guidance online.
Search Oshkosh City Property Tax
The official Oshkosh City Property Tax search begins at the Winnebago County land records portal, which serves as the primary public gateway for parcel data, tax bills, and assessment information tied to properties within city limits. Start by opening the Winnebago County land records system and selecting the search tab labeled for property tax lookup.
Use the following step-by-step process to complete a record search:
- Visit the public portal through the Winnebago County official website
- Choose the search method by parcel number, owner name, or property address
- Enter the requested details and confirm the captcha
- Review the returned parcels for assessed value, tax district, and current bill status
- Download or print the record for personal use, appeals, or payment verification
Oshkosh Property Tax Rates
The Oshkosh Property Tax rate for the city portion of the bill is set at $7.77 per $1,000 of assessed value following the Common Council’s approval of the 2026 operating budget on November 11, 2026. This rate reflects a 37-cent reduction from the prior year and applies to all taxable real property within the municipal boundary of the City of Oshkosh.
Winnebago County separately levies a rate of $3.41 per $1,000 of assessed value, and the Oshkosh Area School District rate sits at $7.81 per $1,000. These three levies combine on every tax bill sent to Oshkosh homeowners and constitute the bulk of the annual property tax obligation.
| Taxing Authority | Mill Rate (Per $1,000) |
|---|---|
| City of Oshkosh | $7.77 |
| Winnebago County | $3.41 |
| Oshkosh Area School District | $7.81 |
Oshkosh Tax Assessment Process
The Oshkosh tax assessment process begins each year when the City Assessor reviews property characteristics, sales data, and market trends to determine the assessed value of every parcel within city limits. Assessment notices are then mailed to property owners, providing the figures used to calculate the upcoming year’s tax bill.
Wisconsin law requires that assessed values reflect fair market value as of January 1 of each year, and municipalities must complete this work before the Board of Review opens in May. Property owners who disagree with the assigned value may gather comparable sales and prepare evidence for a formal objection before the deadline printed on their assessment notice.
Open Book and Board of Review
Open Book sessions allow property owners to meet informally with the assessor to discuss the valuation and request corrections. The Board of Review then convenes to hear formal objections, and property owners may appear in person or submit a written objection form within the statutory window.
Property Tax Appeals in Oshkosh
Property tax appeals in Oshkosh must be filed with the local Board of Review within 30 days of receiving the assessment notice. The appeal form, known as Form PA-115, is available from the City Assessor and must include the owner’s opinion of value along with supporting evidence such as recent comparable sales or property condition issues.
Once filed, the Board of Review schedules a hearing where the property owner presents evidence and the assessor responds. A determination is made at the hearing or within a short period afterward, and unsatisfied property owners may further appeal to the Wisconsin Department of Revenue or circuit court.
Oshkosh Tax Exemptions for Seniors
Wisconsin does not offer a single statewide senior property tax exemption, but Oshkosh seniors can access relief through the Wisconsin Homestead Credit, the Lottery and Gaming Credit, and the Veterans Property Tax Credit. The Homestead Credit is a state income tax credit that returns a portion of property taxes paid by lower-income households, including those headed by adults aged 65 and older.
Seniors with a service-connected disability may qualify for the Veterans Property Tax Credit, which provides a credit against the property tax bill rather than a refund. Income limits, age requirements, and application forms are published on the Wisconsin Department of Revenue website, and the City of Oshkosh Finance Department can answer local filing questions.
Property Tax Calculator for Oshkosh WI
A property tax calculator for Oshkosh WI uses the combined mill rates of the city, county, and school district to project annual liability. To estimate a bill, multiply the assessed value by the sum of all applicable mill rates and divide by $1,000.
For example, a home assessed at $250,000 in the City of Oshkosh would be subject to a combined mill rate of $18.99 per $1,000 (city, county, and school district). The projected annual tax bill would be $4,747.50 before any credits, exemptions, or special assessments are applied.
| Assessed Value | Projected Annual Bill |
|---|---|
| $150,000 | $2,848.50 |
| $200,000 | $3,798.00 |
| $250,000 | $4,747.50 |
| $300,000 | $5,697.00 |
| $350,000 | $6,646.50 |
Oshkosh City Tax Collector Contact
For Oshkosh Property Tax questions about the city portion of the bill, the City of Oshkosh Finance Department serves as the primary point of contact and can address bill amounts, payment plans, and refund requests. Property owners should contact this office first for issues related to the local municipal levy.
Winnebago County residents should note that the Winnebago County Treasurer’s Office does not accept payments on current-year tax bills. All current-year tax payments must be directed to the local municipal treasurer, while the County Treasurer handles delinquent taxes, tax lien sales, and county-levy questions.
Oshkosh School District Levy
The Oshkosh Area School District levy for 2026 is set at $7.81 per $1,000 of assessed value, a slight reduction from the prior year. The school district’s tax levy increased by 2.54 percent in the 2026 budget, but a decline in student enrollment contributed to a lower mill rate, providing modest relief to property owners within the district boundary.
School district levies fund teacher salaries, building maintenance, student programming, and transportation costs. The Oshkosh Area School District publishes annual budget documents and financial reports on its official website for residents who want to review how tax dollars are allocated.
Property Tax Refund Eligibility in Oshkosh
Property tax refund eligibility in Oshkosh is determined by state-level criteria for programs such as the Wisconsin Homestead Credit. To qualify, applicants must meet income limits, own or rent a Wisconsin homestead, and have paid property taxes (or rent that includes property taxes) during the year for which the credit is claimed.
Refunds are claimed by filing Wisconsin Schedule H with the state income tax return, and the Wisconsin Department of Revenue processes payments directly to eligible households. Property owners who believe they have overpaid their local property tax can request a refund from the municipal treasurer, who reviews the claim and issues a credit or refund when appropriate.
Oshkosh Tax Deadline
The Oshkosh Property Tax deadline follows the Wisconsin statutory schedule, with the first installment due on or before January 31 and the second installment due on or before September 5. Property owners may pay the full amount by the January 31 deadline to avoid tracking two separate payments throughout the year.
Late payments are subject to interest and penalty charges at rates set by Wisconsin statute, and delinquent taxes may be added to the following year’s tax roll. Property owners who anticipate difficulty meeting the deadline should contact their local municipal treasurer to discuss payment plan options.
| Installment | Statutory Deadline | Payment Destination |
|---|---|---|
| First Installment (or Full Payment) | January 31 | Local Municipal Treasurer |
| Second Installment | September 5 | Local Municipal Treasurer |
Payment Plans for Oshkosh Property Taxes
Payment plans for Oshkosh Property Taxes are available through the local municipal treasurer for property owners who cannot pay the full amount by the statutory deadline. These plans allow taxpayers to spread payments over a defined period, reducing the risk of delinquency, penalty charges, and eventual tax lien proceedings.
To request a payment plan, property owners should contact the local municipal treasurer’s office as early as possible, ideally before the deadline approaches. The treasurer evaluates each request based on financial circumstances and may require a signed agreement outlining installment amounts, due dates, and interest charges on the unpaid balance.
Oshkosh Real Estate Tax Records
Oshkosh real estate tax records are maintained by the Winnebago County Treasurer’s Office and the City of Oshkosh Assessor, with historical and current data available through the county land records portal. These records include assessed values, tax bill history, payment status, and parcel identification numbers used for legal descriptions.
Title companies, real estate attorneys, and individual buyers frequently search these records during property transactions to confirm ownership, check for liens, and verify tax payment history. Public access is provided through the county land records portal, which offers search by parcel number, owner name, or street address.
Tax District Boundaries Oshkosh
Tax district boundaries in Oshkosh define which municipal, county, school, and special-purpose districts apply to each parcel. These boundaries determine the combination of mill rates that appear on a property tax bill, and properties located near a boundary line may fall into different school districts or technical college districts than neighboring parcels.
Boundary maps are maintained by municipal clerks, county zoning offices, and the Wisconsin Department of Revenue. Property owners can verify their tax district assignments through the county land records portal, which displays the applicable jurisdictions for every parcel within Winnebago County.
Property Tax Lien Information Oshkosh
Property tax lien information for Oshkosh is recorded and maintained by the Winnebago County Register of Deeds, which provides public access to real estate records through the county’s official records portal. Tax liens are placed on properties when taxes become delinquent, and they remain attached to the parcel until the underlying debt, interest, and fees are satisfied.
The Register of Deeds portal allows users to search for recorded documents by name, parcel number, or document type. Buyers and title researchers should review lien history before closing on a property purchase.
Oshkosh Tax Relief Programs
Oshkosh tax relief programs operate at both the state and local levels, providing targeted assistance to seniors, low-income households, and veterans. The Wisconsin Homestead Credit remains the most widely used relief program, offering a state income tax credit that reflects a portion of property taxes paid by qualifying households.
Local programs may include deferred payment arrangements, hardship deferrals, and senior-specific credits authorized by Wisconsin Statute. The City of Oshkosh Finance Department and Winnebago County Treasurer’s Office can provide details on available local programs and the application process.
Municipal Budget Impact of Property Taxes Oshkosh
The municipal budget impact of Property Taxes in Oshkosh is significant, as the property tax levy funds police, fire, public works, library, and general government services. For 2026, the Common Council approved a $235 million operating budget with a flat tax levy and a reduced mill rate, signaling fiscal restraint while maintaining service levels.
When property values rise faster than the levy increase, mill rates decline even if total collections grow. Conversely, when property values fall or stay flat, mill rates may rise to maintain the same total revenue. Oshkosh’s 2026 budget leveraged rising assessments to lower the mill rate, benefiting most homeowners in the city.
How to Contest Oshkosh Property Assessment
To contest an Oshkosh Property Tax assessment, property owners should first review the assessment notice and gather evidence of the property’s market value. Comparable sales of similar properties in the same neighborhood, recent appraisals, and documentation of property defects (such as structural issues or environmental concerns) all strengthen an objection.
The formal process begins with filing an objection form with the City Assessor before the Board of Review opens, followed by attendance at the scheduled hearing. Property owners may represent themselves or hire a representative, and the Board will issue a determination based on the evidence presented.
Evidence That Supports a Successful Appeal
- Recent comparable sales within the same neighborhood
- Photos or reports documenting property defects
- Recent appraisal reports from licensed appraisers
- Documentation of zoning changes or environmental issues
- Income and expense data for income-producing properties
Online Property Tax Portal Oshkosh
The online Property Tax portal for Oshkosh properties is hosted by Winnebago County and provides 24-hour access to assessment data, tax bill amounts, and payment status. Users can search by parcel number, owner name, or property address and view the most recent tax bill, payment history, and any outstanding balances.
The portal is maintained by the Winnebago County Treasurer’s Office, which updates records regularly as payments are processed and assessments are finalized. For questions about portal functionality, the Treasurer’s Office can be reached at the contact details listed at the end of this page.
Role of Oshkosh Finance Department
The City of Oshkosh Finance Department plays a central role in administering Property Tax collections, maintaining financial records, and supporting municipal budget operations. The department processes payments, issues receipts, manages refund requests, and prepares financial reports for the Common Council and state agencies.
Beyond tax collection, the Finance Department coordinates with the City Assessor on annual assessment cycles and works with the Winnebago County Treasurer on tax settlement procedures. Property owners with questions about billing, payment plans, or refund eligibility can contact this office for direct assistance.
Wisconsin Department of Revenue Property Tax Guidance
The Wisconsin Department of Revenue publishes statewide property tax guidance, including equalization reports, assessment manuals, and instructions for the Board of Review. This guidance helps local assessors apply uniform standards and supports property owners who want to better understand how assessments are calculated.
Taxpayers can access forms such as PA-115 (objection to assessment), Schedule H (Homestead Credit), and various exemption applications through the Department of Revenue’s website. The Department also operates an appeals process for property owners who disagree with a Board of Review decision and want to escalate the matter.
Oshkosh Property Tax Records Access Through County Resources
Oshkosh Property Tax records are accessible through multiple county-level resources, including the Treasurer’s Office for billing and payment data, the Register of Deeds for lien and ownership records, and the Land Records portal for parcel-level detail. Each resource serves a distinct purpose in the property tax ecosystem.
For most property tax questions, starting with the Winnebago County Treasurer’s Office provides the fastest path to current bill information, payment status, and delinquency details. Lien and ownership questions are best directed to the Register of Deeds, which maintains the official chain of title and recorded documents.
Recent Budget Decisions Affecting Oshkosh Property Tax
Recent budget decisions affecting Oshkosh Property Tax include the Common Council’s approval of the 2026 budget with a $7.77 city mill rate, the Winnebago County Board’s adoption of a 2026 budget that lowered the county mill rate to $3.41, and the Oshkosh Area School District’s budget setting its mill rate at $7.81. Together, these decisions reduced the combined mill rate for most city homeowners.
Statewide equalization data and enrollment trends influenced the school district’s rate calculation, while rising property assessments allowed the city to lower its mill rate while maintaining a flat tax levy. The combined effect is a modest reduction in property tax bills for many Oshkosh homeowners in 2026.
Property Tax Payment Methods in Oshkosh
Property tax payments in Oshkosh can be made through several methods, depending on the local municipal treasurer’s offerings. Common options include mail-in payment, in-person payment at the treasurer’s office, drop-box payments, and online payments through municipal payment portals such as InvoiceCloud.
Property owners should confirm accepted payment methods with their local municipal treasurer before the statutory deadline. Online payment portals often charge a convenience fee for credit and debit card transactions, while e-check payments are typically offered at no charge.
Special Assessments and Charges on Oshkosh Tax Bills
Special assessments may appear on Oshkosh Property Tax bills in addition to the city, county, and school district levies. These charges fund specific local improvements such as sidewalk repairs, street reconstruction, sewer upgrades, and stormwater management projects that benefit particular properties or neighborhoods.
Special assessments are typically billed over multiple years and may carry their own interest rate. Property owners can review the breakdown of charges on their tax bill and contact the City of Oshkosh Engineering Division or Finance Department for details about specific assessments on their parcel.
Delinquent Property Taxes and Tax Lien Sales
Delinquent Property Taxes in Oshkosh trigger interest and penalty charges at rates set by Wisconsin statute, and properties with unpaid taxes may eventually be subject to tax lien sales conducted by the Winnebago County Treasurer’s Office. Tax lien sales transfer the right to collect delinquent taxes to a third-party buyer, who can later initiate foreclosure proceedings if the debt remains unpaid.
Property owners facing tax delinquency should contact the Winnebago County Treasurer’s Office as soon as possible to explore payment options, hardship deferrals, or installment agreements. Early intervention can prevent additional fees, protect the property from lien sale, and preserve the owner’s equity.
Oshkosh Property Tax Calendar
The Oshkosh Property Tax calendar follows Wisconsin statutory deadlines, with property tax bills mailed in December and installment payments due January 31 and September 5. Assessment notices are typically sent in April, and the Board of Review convenes in May and June to hear formal objections.
Property owners should mark these dates on their calendar each year and monitor mail from the City Assessor and local municipal treasurer to avoid missing deadlines. Late notices can result in penalties, interest charges, and eventual tax delinquency.
Wisconsin Property Tax Law Framework
Wisconsin property tax law is established in Chapter 70 of the Wisconsin Statutes and governs assessment procedures, equalization standards, Board of Review operations, and exemption eligibility. The Wisconsin Department of Revenue oversees compliance and provides technical assistance to local assessors and treasurers.
Property owners should reference Wisconsin Statute Chapter 70 when researching their rights during the assessment and appeal process. Local municipalities may also adopt ordinances that supplement state law, and the City of Oshkosh Clerk’s Office can provide information on local provisions.
Preparing for a Board of Review Hearing
Preparing for a Board of Review hearing requires property owners to organize their evidence and understand the procedural rules that govern the process. Begin by reviewing the assessment notice, gathering comparable sales data, and preparing a clear presentation of the property’s market value based on factual evidence.
At the hearing, property owners may present their case, question the assessor’s evidence, and respond to board questions. A well-organized presentation with documented comparables and a logical argument often produces better outcomes than informal discussions or unsupported claims.
Contact, Local Details, and Map
The City of Oshkosh Assessor’s Office is the primary contact for Oshkosh Property Tax assessment questions, parcel data, and property record searches. Use the contact details below to reach the appropriate office for your specific question.
| Department | Phone | Address | |
|---|---|---|---|
| City of Oshkosh Assessor’s Office | (920) 236-5070 | assessor@oshkoshwi.gov | DEAN PETERS CITY ASSESSOR, PO BOX 1130, OSHKOSH, WI 54903-1130 |
| Winnebago County Clerk | 920-232-3431 | jabarthels@winnebagocountywi.gov | PO Box 2806, Oshkosh, WI 54903-2806 |
City of Oshkosh Assessor’s Office
Office Hours: 8:00 AM to 4:30 PM
Phone: (920) 236-5070
Email: assessor@oshkoshwi.gov
Address: DEAN PETERS CITY ASSESSOR, PO BOX 1130, OSHKOSH, WI 54903-1130
Winnebago County Clerk
Phone: 920-232-3431
Email: jabarthels@winnebagocountywi.gov
Mailing Address: PO Box 2806, Oshkosh, WI 54903-2806
Physical Address: 112 Otter Avenue, Oshkosh, WI
Winnebago County Official Website
https://wi-winnebagocounty.civicplus.com/
Frequently Asked Questions
Oshkosh property tax information helps homeowners understand their bill, locate exemptions, and avoid missed deadlines. The city works with Winnebago County Treasurer and the local assessor to keep records online, offer payment plans, and answer credit questions. Knowing where to find the tax calculator, appeal forms, and contact details saves time and money.
What is the current Oshkosh property tax deadline for 2026?
The first installment for 2026 property taxes is due by January 31. A second installment or payment‑in‑full must be received by September 5. Late payments incur a penalty set by Winnebago County Treasurer. Check the Treasurer’s website for any temporary hour changes before you file.
How can I use the Oshkosh property tax calculator?
Visit the Winnebago County land records portal at ascent.co.winnebago.wi.us/LandRecords. Enter your parcel number, select “Tax Bill,” and the system shows the assessed value, mill rate, and total due. The calculator updates automatically when the county adjusts the mill rate, so the amount you see matches the bill you receive.
Where do I find the contact information for the Oshkosh city tax collector?
Phone: (920) 236‑5070 Email: assessor@oshkoshwi.gov Office: Dean Peters City Assessor, PO Box 1130, Oshkosh, WI 54903‑1130. The office is open Monday‑Friday, 8:00 a.m.‑4:30 p.m. Use the e‑contact form on the city’s website for non‑urgent questions.
How do I appeal an Oshkosh property assessment?
First, obtain your assessment notice from the Winnebago County Treasurer’s portal. If you disagree, file an appeal with the Winnebago County Board of Review within 30 days of the notice date. Include recent comparable sales, a copy of the assessment, and a brief written argument. The Board will schedule a hearing, typically within 60 days, and issue a written decision.
What senior tax exemptions are available in Oshkosh?
The Wisconsin Homestead Credit reduces the taxable portion of a primary residence for owners age 62 or older with qualifying income. Seniors may also qualify for the County Senior Property Tax Credit, which offers a flat reduction on the bill. To apply, submit the state homestead credit form by the January 31 deadline and contact the Winnebago County Treasurer for any local credit paperwork.