HonestCasa logoHonestCasa
Updated 2025 Tax Year

Walworth County
Property Tax Guide

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

10 Official Sources
8 min read
Quick Facts
Tax Rate
Approximately 1% of assessed value (varies by jurisdiction - school districts, townships, municipalities)
Exemptions
5+ Available
Section 1

How Property Tax Works

Property taxes in Walworth County, South Dakota serve as the primary funding source for essential local services including public schools, county government operations, road maintenance, and emergency services. The county follows South Dakota's property tax system where properties are assessed at market value and taxed according to rates set annually by various local taxing jurisdictions.

Walworth County property owners can expect effective tax rates that typically align with South Dakota's statewide average of approximately 1% of assessed value, though actual rates vary significantly by location within the county. This variation occurs because property tax bills include levies from multiple overlapping jurisdictions such as school districts, municipalities, townships, and special assessment districts. Property owners in areas with additional special districts for services like fire protection, water systems, or economic development may see higher total rates than the county average.

The assessment and taxation process operates on an annual cycle, with property values determined by the county assessor and tax rates set by individual taxing authorities each year. All property taxes become due based on the county's established payment schedule, and various tax relief programs are available for qualifying property owners, though these require separate applications and are not automatically applied.

Section 2

What Makes Up Your Tax Bill

Property tax rates in Walworth County vary by specific location due to overlapping taxing jurisdictions. The following represents typical levy components for the current tax year:

ComponentApproximate RateDescription
County General0.15% - 0.25%County operations, roads, law enforcement
School District0.60% - 0.80%Local school district operations and facilities
Municipality0.10% - 0.30%City/town services (where applicable)
Township0.05% - 0.15%Rural township services
Special Districts0.05% - 0.20%Fire protection, water, economic development
Total Range0.95% - 1.70%Combined effective rate

Note: These rates are estimates for planning purposes. Actual rates are set annually by each taxing jurisdiction and vary by specific location within Walworth County. Contact the Walworth County Auditor for exact rates applicable to your property's tax code area.

Special assessment districts may apply additional levies for improvements like street lighting, drainage systems, or economic development zones. Property owners should verify their specific tax code area to determine which levies apply to their property.

Section 3

When Are Property Taxes Due?

For the 2025/2026 tax year in Walworth 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 Walworth County may be assessed when significant changes occur to a property during the tax year that affect its assessed value. Common triggers include new construction, major improvements, additions, or changes in property use classification that increase the property's taxable value.

When supplemental taxes apply, they are calculated based on the difference between the original assessed value and the new assessed value, multiplied by the applicable tax rate for the remaining portion of the tax year. For example, if a property owner completes a $100,000 addition in July, they would owe supplemental taxes on that added value for the remaining months of the tax year.

Example: A homeowner completes a $50,000 home addition in September. With an effective tax rate of 1.2%, the annual tax on the addition would be $600. Since the improvement was completed with 4 months remaining in the tax year, the supplemental tax would be approximately $200 ($600 ÷ 12 months × 4 months). This supplemental amount would be billed separately from the regular annual property tax bill.

Example Calculation

The following examples show estimated annual property taxes for different home values in Walworth County, assuming a 1.2% effective tax rate and potential homestead tax credit eligibility:

Example 1: $300,000 Home

  • Market/Assessed Value: $300,000
  • Homestead Tax Credit: -$1,000 (estimated, requires application)
  • Net Taxable Value: $299,000
  • Annual Property Tax: $3,588 ($299,000 × 1.2%)
  • Monthly Escrow: $299

Example 2: $600,000 Home

  • Market/Assessed Value: $600,000
  • Homestead Tax Credit: -$1,000 (estimated, requires application)
  • Net Taxable Value: $599,000
  • Annual Property Tax: $7,188 ($599,000 × 1.2%)
  • Monthly Escrow: $599

Example 3: $1,000,000 Home

  • Market/Assessed Value: $1,000,000
  • Homestead Tax Credit: -$1,000 (estimated, requires application)
  • Net Taxable Value: $999,000
  • Annual Property Tax: $11,988 ($999,000 × 1.2%)
  • Monthly Escrow: $999

Note: These calculations use estimated rates and credit amounts for illustration. Actual taxes depend on your property's specific tax code area and applicable special district levies. Tax credits require separate application and approval.

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 Walworth County require property tax escrow accounts for borrowers with less than 20% down payment. Your lender collects monthly property tax payments along with your mortgage payment and holds these funds in escrow until taxes become due.

Escrow payments are calculated by dividing your annual property tax bill by 12 months, often with an additional cushion as allowed by federal regulations. Lenders typically perform annual escrow analyses and adjust monthly payments based on actual tax bills and account balances. If taxes increase significantly, you may receive a shortage notice requiring additional payments or higher monthly escrow amounts.

Property taxes in Walworth County are due annually by January 31st, or in two installments (first half by January 31st, second half by July 31st). Lenders generally make payments before these deadlines to avoid penalties. Property owners should verify that their mortgage company has current tax information and is making timely payments, as owners remain ultimately responsible for ensuring taxes are paid even when using escrow services.

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 property taxes due in Walworth County? A: Property taxes are due in full by January 31st, or you can pay in two installments with the first half due by January 31st and the second half due by July 31st. Personal property taxes must be paid by January 31st.

Q: What homestead tax credits are available and how do I apply? A: South Dakota offers a Property Tax Homestead Exemption program that may cap assessment increases for qualifying homeowners. You must apply using Form PT 38C and meet income and residency requirements. This is not automatic and requires annual or periodic reapplication. Contact the Walworth County Assessor for current application deadlines and eligibility requirements.

Q: Are there other property tax relief programs available? A: Yes, South Dakota offers various tax relief programs including credits for disabled veterans, elderly/disabled persons, and agricultural land classifications. Each program has specific eligibility requirements and application procedures. Most require separate applications and are not automatically applied.

Q: How often are properties reassessed in Walworth County? A: South Dakota requires properties to be assessed annually at market value. The County Assessor determines property values each year, though not all properties require physical inspection annually.

Q: How can I appeal my property assessment? A: Property owners who disagree with their assessment can appeal to the local Board of Equalization during the designated appeal period, typically in March and April. Contact the Walworth County Assessor's office for specific dates and procedures.

Q: What are the penalties for late property tax payments? A: Late payments incur penalties and interest charges. After April 30th, unpaid first-half taxes become delinquent and subject to penalty. Properties with unpaid taxes may eventually face tax deed proceedings.

Q: Can I pay my property taxes online? A: Contact the Walworth County Treasurer's office to inquire about online payment options and accepted payment methods for property taxes.

Q: Why did my property taxes increase if I didn't make improvements? A: Property taxes can increase due to rising property values, changes in tax rates set by local governments, new special district assessments, or loss of previously applied tax credits that require reapplication.

Q: What happens if my mortgage company doesn't pay my taxes on time? A: While your mortgage company handles escrow payments, you remain legally responsible for ensuring property taxes are paid. Monitor your tax status and contact your lender immediately if you notice payment issues.

Q: How do special district taxes affect my bill? A: Properties located within special districts for services like fire protection, water systems, or economic development pay additional levies beyond basic county and school taxes. These vary by location within Walworth County and are listed separately on your tax statement.

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

Free • No credit check • 2-minute estimate