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Updated 2025 Tax Year

Bon Homme County
Property Tax Guide

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

10 Official Sources
8 min read
Quick Facts
Tax Rate
1.15% effective rate (varies by taxing district and municipality)
Exemptions
4+ Available
Section 1

How Property Tax Works

Bon Homme County, South Dakota operates under a property tax system that serves as the primary funding mechanism for essential local services including schools, roads, emergency services, and county operations. The county's effective property tax rate for FY 2025-2026 is approximately 1.15%, though this represents a baseline rate that can vary significantly depending on your property's location within the county.

Property taxes in Bon Homme County are calculated based on assessed value, which is determined by the county assessor and represents the property's fair market value. It's important to understand that your actual tax rate may differ from the county average due to special taxing districts such as school districts, municipalities, and special service districts that can impose additional levies. These district-specific rates are layered on top of the base county levy, meaning properties in different areas of the county face varying total tax burdens.

The county conducts property assessments to ensure equitable taxation, and property owners have appeal rights if they believe their assessment is incorrect. Tax bills are typically issued annually, and various tax credits (not automatic exemptions) are available to qualifying property owners who submit proper applications by specified deadlines.

Section 2

What Makes Up Your Tax Bill

ComponentRate (per $1,000)Description
County General~$3.50Basic county operations, roads, public safety
School District~$7.00-$9.00Varies by school district boundaries
Municipal$0.00-$4.00Only applies within city limits
Special Districts$0.50-$2.00Fire districts, library districts, etc.
Total Estimated$11.50Varies by location and special districts

Rates shown are for FY 2025-2026 levy year and are subject to annual adjustment. Your actual rate depends on which taxing jurisdictions your property falls within. Properties outside incorporated areas typically have lower rates due to fewer applicable levies, while properties within cities may have additional municipal taxes.

Note: Special taxing districts can significantly impact your total rate. Rural properties may be subject to rural fire district levies, while urban properties face municipal taxes. Contact the Bon Homme County Treasurer for your specific district combination.

Section 3

When Are Property Taxes Due?

For the 2025/2026 tax year in Bon Homme 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 Bon Homme County are additional property tax assessments that occur when there are mid-year changes to a property's taxable status or value. The most common triggers include new construction completion, property ownership transfers that reveal unreported improvements, or corrections to previous assessment errors.

When supplemental taxes are levied, they are calculated by applying the current tax rate to the difference between the new assessed value and the original assessed value, prorated for the portion of the tax year remaining. For example, if you complete a $50,000 home addition in July and it's discovered during a routine inspection, the county assessor will reassess your property and apply supplemental taxes for the remaining months of the current tax year.

Example: If your property value increases by $50,000 due to completed improvements discovered in July, and your total tax rate is 1.15%, the supplemental tax would be approximately $287.50 (($50,000 × 0.0115) ÷ 2) for the remaining six months of the tax year. These supplemental taxes are billed separately and typically due within 30 days of the bill date.

Example Calculation

Property Value: $300,000

  • Assessed Value: $300,000 (100% of market value)
  • Available Credits Applied: -$4,800 (Homestead Credit - requires application)
  • Net Taxable Value: $295,200
  • Annual Tax: $3,395 (1.15% rate)
  • Monthly Escrow: $283

Property Value: $600,000

  • Assessed Value: $600,000 (100% of market value)
  • Available Credits Applied: -$4,800 (Homestead Credit - requires application)
  • Net Taxable Value: $595,200
  • Annual Tax: $6,845 (1.15% rate)
  • Monthly Escrow: $571

Property Value: $1,000,000

  • Assessed Value: $1,000,000 (100% of market value)
  • Available Credits Applied: -$4,800 (Homestead Credit - requires application)
  • Net Taxable Value: $995,200
  • Net Annual Tax: $11,445 (1.15% rate)
  • Monthly Escrow: $954

Note: All tax credits shown require annual application and approval. Homestead credits typically limit assessment increases rather than reducing market value. Rates may vary by special district. Contact the County Assessor's office for current credit amounts and application procedures.

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Section 5

Escrow & Property Taxes

Most mortgage lenders in Bon Homme County require property tax escrow accounts for borrowers with less than 20% down payment, though some lenders mandate escrow regardless of down payment amount. Your lender will estimate annual property taxes, divide by 12, and collect this amount with your monthly mortgage payment. The lender typically maintains a cushion of 2-3 months of tax payments in the escrow account to ensure funds are available when taxes become due.

Property taxes in Bon Homme County are typically due January 15 each year, and your lender will pay the full annual amount from your escrow account by this deadline. After payment, your lender will provide an escrow analysis statement showing how your tax payments affected the account balance. If property taxes increase, your monthly escrow payment may be adjusted upward; if taxes decrease or were overestimated, you may receive a refund or see reduced monthly payments.

Important: Even with an escrow account, you remain responsible for monitoring your property tax bills and ensuring accuracy. Review your annual tax statement carefully and notify your lender of any discrepancies. If you believe your assessment is incorrect, you must file appeals according to county deadlines—your lender cannot handle this process for you.

How HonestCasa Helps
  • Understand whether your escrow is set correctly
  • See how rising taxes will change your monthly payment
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Section 6

Frequently Asked Questions

Q: When are property taxes due in Bon Homme County for FY 2025-2026? A: Property taxes are typically due January 15, 2026. For the current tax year, the deadline is January 15, 2026. Check with the County Treasurer's office for any updates or payment options.

Q: What tax credits are available and do they apply automatically? A: The primary credit is the Homestead Credit for qualifying owner-occupied residences. This credit is NOT automatic and requires an annual application filed with the County Assessor's office. Additional credits may be available for disabled veterans, elderly residents, or agricultural properties, but all require separate applications and documentation.

Q: How does the Homestead Credit work? A: The Homestead Credit typically limits annual assessment increases rather than reducing your property's market value. For example, it may cap assessment growth at a certain percentage even if market values rise more dramatically. You must apply annually, and the credit only applies to your primary residence where you live on January 1 of the assessment year.

Q: What is the application deadline for tax credits? A: Most tax credit applications, including Homestead Credits, must be filed by May 1 of the assessment year. Contact the Bon Homme County Assessor's office at (605) 589-4214 for specific deadlines and required documentation.

Q: How often are properties reassessed in Bon Homme County? A: South Dakota requires counties to reassess all property at least once every five years, though market value updates may occur more frequently. The County Assessor's office conducts ongoing reviews and may adjust individual property values based on sales data, improvements, or physical inspections.

Q: What are the penalties for late property tax payments? A: Late payments typically incur penalties and interest charges. Payments made after January 15 may be subject to penalties starting at 1.5% per month, with additional interest accruing monthly. Contact the County Treasurer for current penalty rates and payment plan options.

Q: Can I pay my property taxes online? A: Check with the Bon Homme County Treasurer's office for current online payment options. Many South Dakota counties offer online payment systems, though availability varies. You can contact the treasurer at (605) 589-4214 for current payment methods.

Q: How do special district taxes affect my bill? A: Special districts like school districts, fire districts, and municipal governments can levy additional taxes beyond the base county rate. Your total tax rate depends on which districts your property falls within. Rural properties may have fire district taxes while avoiding municipal taxes, whereas city properties face municipal levies but may have different school district rates.

Q: How do I appeal my property assessment? A: Assessment appeals must be filed with the County Board of Equalization by specific deadlines, typically in March or April. You must provide evidence that your property is overvalued compared to similar properties or present documentation of errors in the assessment. Contact the County Assessor's office for appeal forms and deadlines.

Q: Are there property tax relief programs for seniors or low-income residents? A: South Dakota offers a Property Tax Homestead Exemption program that may defer taxes for qualifying elderly or disabled residents until the property is sold. This program requires application and income qualification. Contact the County Assessor's office to determine eligibility and application procedures.

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