HonestCasa logoHonestCasa
All Tax Guides
Updated 2025 Tax Year

Grant County
Property Tax Guide

Everything you need to know about property taxes in Grant County, WI. Rates, due dates, exemptions, and how it affects your monthly payment.

10 Official Sources
8 min read
Calculate Your True CostMortgage Calculator
Quick Facts
Tax Rate
1.9635% effective rate, varies by municipality and special districts within Grant County
Exemptions
5+ Available
Section 1

How Property Tax Works

Property taxes in Grant County, Wisconsin, are the primary source of funding for local government services including public schools, county operations, municipal services, and special districts. The county follows Wisconsin's property tax system where properties are assessed at fair market value and taxed based on a combination of county, municipal, school district, and special district rates.

For the 2025 tax levy year, Grant County's effective property tax rate is approximately 1.9635% of assessed value, though actual rates vary significantly by location within the county depending on your specific municipality and special taxing districts. Properties are assessed using an assessment ratio of 0.685323716 to calculate estimated fair market value. Property owners should note that tax bills reflect the combined rates of all applicable taxing jurisdictions, and rates can differ substantially between townships, cities, and school districts within Grant County.

Section 2

What Makes Up Your Tax Bill

ComponentRate per $1,000Description
County RateVaries by districtGeneral county operations and services
Municipal RateVaries by city/townLocal government services
School District Rate$6.36K-12 public education funding
Technical CollegeVaries by districtVocational education services
Library DistrictVaries by districtPublic library services
Total Effective Rate$19.635Combined rate (1.9635%)

Rates shown are for the 2025 levy year (payable in 2026). Actual rates vary by specific location within Grant County based on your municipality and special taxing districts. Contact the Grant County Assessor's office for your exact tax district rates.

Section 3

When Are Property Taxes Due?

For the 2025/2026 tax year in Grant County, property taxes are due in two installments:

Pro tip: If you pay through mortgage escrow, your lender splits these payments across your monthly mortgage. If you pay directly, set calendar reminders to avoid late penalties.
Section 4

Supplemental Tax Bills

Supplemental taxes in Grant County are additional property tax bills issued when there are significant changes to property ownership, value, or use during the tax year. Common triggers include new construction completion, major improvements, ownership transfers, or changes in exemption status that occur after the annual assessment date.

Supplemental taxes are calculated by applying the current year's tax rate to the difference between the new assessed value and the previous assessed value, prorated for the portion of the tax year remaining. For example, if a $100,000 addition is completed in January and your total tax rate is 1.9635%, you would owe approximately $1,964 in supplemental taxes for that improvement, payable according to the county's established due dates.

Example Calculation

Example 1: $300,000 Home

  • Assessed Value: $300,000
  • Less: Homestead Credit (if eligible): -$1,168 maximum
  • Net Taxable Value: ~$300,000
  • Annual Tax (1.9635%): $5,891
  • Monthly Escrow: $491

Example 2: $600,000 Home

  • Assessed Value: $600,000
  • Less: Homestead Credit (if eligible): Varies by income
  • Net Taxable Value: ~$600,000
  • Annual Tax (1.9635%): $11,781
  • Monthly Escrow: $982

Example 3: $1,000,000 Home

  • Assessed Value: $1,000,000
  • Less: Limited credits available at this value
  • Net Taxable Value: ~$1,000,000
  • Annual Tax (1.9635%): $19,635
  • Monthly Escrow: $1,636

Note: All tax credits require separate application and income qualification. Credits are not automatically applied.

See How Taxes Affect Your Payment

Property taxes are just part of your total monthly cost. Get the full picture.

Calculate Now
Section 5

Escrow & Property Taxes

Most mortgage lenders in Grant County require property tax escrow accounts for loans with less than 20% down payment. Your lender collects monthly escrow payments equal to 1/12 of your annual property tax bill, plus a cushion amount typically equal to 2-3 months of taxes.

Lenders pay your property taxes directly to Grant County on the March 31st first installment and July 31st final payment due dates. You should receive an annual escrow analysis statement showing your account activity and any required payment adjustments. If your property taxes increase due to reassessment or rate changes, your monthly escrow payment will be adjusted accordingly. Property owners are responsible for verifying that lenders pay taxes on time, as late penalties will be assessed to the property owner regardless of escrow arrangements.

How HonestCasa Helps
  • Understand whether your escrow is set correctly
  • See how rising taxes will change your monthly payment
  • Plan ahead instead of being surprised by "shortage" letters
Section 6

Frequently Asked Questions

Q: When are Grant County property taxes due for 2026? A: First installment due March 31, 2026; full payment due July 31, 2026. Payments accepted in person, by mail, or online.

Q: What tax credits are available and do I need to apply? A: Wisconsin Homestead Credit is the primary credit, with maximum $1,168 for qualifying income levels. You MUST file Form H annually - credits are never automatic and require application.

Q: How does the Homestead Credit work? A: The Homestead Credit limits annual assessment increases and provides direct tax bill reduction based on income. You must apply annually and meet income thresholds. This is a tax credit, not an exemption.

Q: How often are properties reassessed in Grant County? A: Wisconsin requires reassessment maintain assessment ratios between certain ranges. Contact the Grant County Assessor for current reassessment schedules in your municipality.

Q: What happens if I pay my property taxes late? A: Late payments incur penalties and interest charges. Contact the Grant County Treasurer's office for specific penalty rates and payment options.

Q: Can I pay my property taxes online? A: Yes, Grant County accepts online payments. Check the county website or your tax bill for online payment portal information and any associated convenience fees.

Q: Why do my taxes differ from my neighbor's? A: Tax amounts vary based on assessed property value, applicable special districts (fire, library, etc.), and any credits or exemptions applied. Different municipalities within Grant County have different tax rates.

Q: How do I appeal my property assessment? A: Contact the Grant County Assessor's office for appeal procedures and deadlines. Wisconsin has specific timeframes for filing assessment appeals that must be followed.

Verified Sources

Backed by 10 Official Government Sources

Every fact in this guide is sourced from official county, state, and federal documents.

01
County
2025 Statement of Assessment for 5soagrant County - Wisconsin ...revenue.wi.gov
02
County
Tax Rates - Grant County Treasurertreasurer.grantcounty27.us
03
financial reportripon.k12.wi.us
04
January 2026revenue.wi.gov
05
Tax Doc
Property Tax Information Center | Wausau, WIwausauwi.gov
06
Tax Doc
Wisconsin Legislature: Tax 14.01(2)(a)docs.legis.wisconsin.gov
07
DOR Homestead Credit - Wisconsin Department of Revenuerevenue.wi.gov
08
Tax Doc
homestead tax credit - Wisconsin Legislative Documentsdocs.legis.wisconsin.gov
09
Tax Doc
Homestead Tax Credit - Wisconsin Legislative Documentsdocs.legis.wisconsin.gov
10
Tax Doc
Wisconsin Legislature: Tax 14.01(2)(c)docs.legis.wisconsin.gov
All sources verified as of 2025 Tax Year

See the Full Picture of Your Home Costs

Property taxes are just one piece of homeownership. HonestCasa helps you understand your total monthly cost and explore safe ways to access your home equity.

Total Monthly Cost

Mortgage + taxes + insurance + HOA

Equity Growth

Track how your equity grows over time

Safe Equity Access

Options for projects or debt payoff

Run Your ScenarioTry Calculator

Free • No credit check • 2-minute estimate