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Updated 2025 Tax Year

Lake County
Property Tax Guide

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

10 Official Sources
8 min read
Quick Facts
Tax Rate
Varies by district, approximately 1% base rate plus local levies for schools and municipalities
1st Due
Apr 30
2nd Due
Oct 31
Exemptions
4+ Available
Section 1

How Property Tax Works

Lake County, South Dakota operates under the state's property tax system to fund essential local services including schools, roads, law enforcement, and county operations. Property taxes in South Dakota are administered at the county level, with Lake County following the state's assessment practices and local levy requirements. The county assessor determines property values based on market conditions, while the county treasurer handles tax collection and payment processing.

Effective property tax rates in Lake County vary depending on your specific location within the county due to overlapping special taxing districts such as school districts, municipalities, and other local service areas. While South Dakota's statewide average property tax rate is approximately 1%, your actual rate in Lake County may differ based on the combination of taxing jurisdictions that serve your property. Property owners should expect variations in tax rates even within the same neighborhood due to these special district boundaries.

Section 2

What Makes Up Your Tax Bill

Current tax rate information for Lake County is not readily available in public databases. Property tax rates in South Dakota are set annually during the budget process and vary significantly by location within each county.

ComponentRateDescription
County GeneralContact CountyBasic county services and operations
School DistrictVaries by DistrictK-12 education funding
MunicipalityVaries if ApplicableCity/town services (if within city limits)
Special DistrictsVaries by LocationFire, water, sanitation, or other local services

Note: Tax rates are set annually and vary by special taxing districts within Lake County. Contact the Lake County Assessor's Office at (605) 256-5644 or visit their official website for current levy year rates specific to your property location.

Section 3

When Are Property Taxes Due?

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

First Installment
Apr 30
Delinquent after Dec 10
Second Installment
Oct 31
Delinquent after Apr 10
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 South Dakota are typically triggered by changes in property ownership, new construction, or significant improvements that occur after the annual assessment date. When property changes hands or new construction is completed mid-year, the county may issue a supplemental tax bill to account for the change in assessed value or ownership.

These supplemental assessments are calculated based on the difference between the old and new assessed values, prorated for the remaining portion of the tax year. For example, if you purchase a home in Lake County in July that was previously assessed at a lower value, you may receive a supplemental bill covering the tax difference from July through December. The supplemental tax uses the same tax rates that apply to your property's location within the various taxing districts.

Example Calculation

The following examples use estimated rates for illustration purposes. Actual rates vary by location within Lake County based on special taxing districts.

Example 1: $300,000 Home

  • Assessed Value: $300,000
  • Less: Homestead Credit (if applicable): Varies
  • Net Taxable Value: ~$300,000
  • Estimated Tax Rate: 1.0%
  • Annual Tax: ~$3,000
  • Monthly (if escrowed): ~$250

Example 2: $600,000 Home

  • Assessed Value: $600,000
  • Less: Homestead Credit (if applicable): Varies
  • Net Taxable Value: ~$600,000
  • Estimated Tax Rate: 1.0%
  • Annual Tax: ~$6,000
  • Monthly (if escrowed): ~$500

Example 3: $1,000,000 Home

  • Assessed Value: $1,000,000
  • Less: Homestead Credit (if applicable): Varies
  • Net Taxable Value: ~$1,000,000
  • Estimated Tax Rate: 1.0%
  • Annual Tax: ~$10,000
  • Monthly (if escrowed): ~$833

Note: Tax credits require annual application and are not automatic. Contact Lake County Assessor for specific credit amounts and eligibility requirements.

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Section 5

Escrow & Property Taxes

Most mortgage lenders in Lake County require property tax escrow accounts for borrowers with less than 20% down payment. Your lender collects monthly tax payments along with your mortgage payment and holds these funds in escrow until tax due dates. The lender then pays your property taxes directly to Lake County on your behalf.

Lenders typically conduct annual escrow analyses to ensure adequate funds are collected. If property taxes increase, your monthly escrow payment may rise accordingly. You'll receive an annual escrow statement showing deposits, payments, and any surplus or shortage. Property owners with escrow accounts should verify that payments were made correctly and on time, as you remain ultimately responsible for tax obligations 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 Lake County? A: Property tax due dates vary by county in South Dakota. Contact the Lake County Treasurer's Office for specific due dates and payment schedules for the current tax year.

Q: What homestead tax credits are available? A: South Dakota offers various property tax relief programs. Check with the Lake County Assessor's office for available exemptions and credits, including homestead programs that may limit annual assessment increases. Applications are typically required annually.

Q: Do I need to apply for tax credits each year? A: Yes, most property tax credits and exemptions in South Dakota require annual application. Contact the Lake County Assessor's office by April 1st annually to ensure you don't miss application deadlines.

Q: How does the homestead credit work? A: Homestead programs typically limit annual increases in assessed value rather than reducing market value. This caps how much your assessment can grow year-over-year. You must file an application to qualify, and the program helps control tax increases for primary residences.

Q: When are properties reassessed? A: South Dakota conducts property assessments annually. The Lake County Assessor reviews market conditions and adjusts property values accordingly each year for the following tax year.

Q: How do I appeal my assessment? A: Property assessment appeals in Lake County follow South Dakota state procedures. Contact the Lake County Assessor's office for appeal deadlines, required forms, and the appeals process timeline.

Q: What are the penalties for late payment? A: South Dakota law allows counties to charge interest and penalties on delinquent property taxes. Contact Lake County Treasurer's office for specific penalty rates and payment grace periods.

Q: Can I pay my property taxes online? A: Many South Dakota counties offer online payment options. Check the Lake County Treasurer's website or call their office to confirm available electronic payment methods and any associated fees.

Q: Why do property taxes vary within Lake County? A: Tax rates differ based on special taxing districts that serve your property, including school districts, municipalities, fire districts, and other local service areas. Properties in different combinations of these districts will have different total tax rates.

Q: Are senior citizens eligible for property tax relief? A: South Dakota offers property tax relief programs for seniors and disabled individuals. Contact the Lake County Assessor's office for eligibility requirements, application procedures, and deadlines for these programs.

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