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Updated 2025 Tax Year

Barnwell County
Property Tax Guide

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

10 Official Sources
8 min read
Quick Facts
Tax Rate
200.65 mills ($20.065 per $1,000 assessed value) - varies by special taxing districts and municipal boundaries
Exemptions
5+ Available
Section 1

How Property Tax Works

Barnwell County, South Carolina operates on an assessment-based property tax system that serves as a primary funding source for essential county services, including schools, public safety, infrastructure maintenance, and local government operations. Property owners pay taxes based on their property's assessed value, which is determined by the County Assessor and reassessed periodically to reflect current market conditions.

For the 2025-2026 fiscal year, Barnwell County has set a tax rate of 200.65 mills (equivalent to $20.065 per $1,000 of assessed value). However, your actual tax rate may vary depending on your property's location within special taxing districts, municipal boundaries, or areas subject to additional assessments such as school bonds or fire districts. The county also reimposed a 1% Capital Projects Tax in May 2025, which may affect total tax obligations. Property owners should verify their specific tax district classifications to understand their complete tax liability.

Section 2

What Makes Up Your Tax Bill

ComponentRate (Mills)Description
Base County Levy200.65FY 2025-2026 general county operations and services
Capital Projects Tax1%Reimposed May 2025 for infrastructure improvements
School District TaxesVariesDependent on specific school district boundaries
Municipal TaxesVariesApplied if property is within city/town limits
Fire District TaxesVariesBased on fire protection district service area
Special AssessmentsVariesMay include drainage, lighting, or other local improvements

Note: The 200.65 mill rate applies to the FY 2025-2026 levy year. Actual total rates vary significantly by location within Barnwell County due to overlapping special taxing districts. Properties may be subject to additional municipal, school district, and special district taxes that can substantially increase the effective tax rate beyond the base county levy.

Section 3

When Are Property Taxes Due?

For the 2025/2026 tax year in Barnwell 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 Barnwell County are additional property tax assessments that occur when there are changes to property ownership, value, or use during the tax year. These taxes are triggered by events such as new construction completion, property transfers, changes in property classification, or the correction of assessment errors discovered after the regular tax roll has been finalized.

Supplemental taxes are calculated based on the difference between the old and new assessed values, multiplied by the applicable tax rate, and prorated for the remaining months in the tax year. For example, if a property improvement increases the assessed value from $200,000 to $250,000 in July, and the tax rate is 200.65 mills, the supplemental tax would be calculated as: ($250,000 - $200,000) × 4% assessment ratio × 200.65 mills ÷ 1000 × 6/12 months = approximately $201 for the remainder of the tax year.

Example Calculation

Example 1: $300,000 Home

  • Market Value: $300,000
  • Assessment Ratio (4%): $12,000
  • Less Homestead Credit (if applied): -$1,200
  • Net Taxable Value: $10,800
  • Annual Tax (200.65 mills): $2,167
  • Monthly Payment: $181

Example 2: $600,000 Home

  • Market Value: $600,000
  • Assessment Ratio (4%): $24,000
  • Less Homestead Credit (if applied): -$1,200
  • Net Taxable Value: $22,800
  • Annual Tax (200.65 mills): $4,575
  • Monthly Payment: $381

Example 3: $1,000,000 Home

  • Market Value: $1,000,000
  • Assessment Ratio (4%): $40,000
  • Less Available Credits (if applied): -$1,200
  • Net Taxable Value: $38,800
  • Annual Tax (200.65 mills): $7,785
  • Monthly Payment: $649

Note: These calculations use the base county rate only. Actual taxes will be higher due to school district, municipal, and special district taxes. Tax credits shown require separate applications and are not automatically applied.

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Section 5

Escrow & Property Taxes

Most mortgage lenders in Barnwell County require property tax escrow accounts for borrowers with less than 20% down payment or upon request. Lenders collect monthly tax payments as part of your mortgage payment and hold these funds in an escrow account to pay your annual property tax bill when due on January 15th. The monthly escrow amount is calculated by dividing your previous year's total tax bill by 12, though lenders may include a cushion to account for potential tax increases.

Lenders are required to provide annual escrow statements showing deposits, payments, and account balances. If your taxes increase significantly due to reassessment or rate changes, your lender may require you to pay the shortage over 12 months in addition to the increased monthly escrow payment. Property owners can verify that their lender has paid taxes on time by checking with the Barnwell County Tax Collector's office or through the county's online payment system.

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 Barnwell County? A: Property taxes for FY 2025-2026 are due by January 15, 2026. Payments received after this date are subject to penalties and interest charges.

Q: What tax credits are available and how do I apply? A: Barnwell County offers various tax credits including Homestead, Elderly, Disabled, and Agricultural credits. All credits require separate applications filed with the County Auditor's office. Applications must typically be filed by a specific deadline, usually December 31st preceding the tax year.

Q: How does the Homestead credit work? A: The Homestead credit caps assessment increases on your primary residence, typically limiting annual assessment growth to a specific percentage. This credit does NOT reduce your home's market value but limits how much your assessed value can increase year over year. You must file an application to receive this benefit.

Q: How often are properties reassessed in Barnwell County? A: South Carolina law requires countywide property reassessment at least every five years. Barnwell County follows this schedule, with individual properties potentially being reviewed more frequently if significant changes occur.

Q: What are the penalties for late payment? A: Late payments are subject to penalties and interest. The exact penalty structure varies, but generally includes both a percentage penalty and monthly interest charges that accrue until the full balance is paid.

Q: Can I pay my property taxes online? A: Yes, Barnwell County offers online tax payments 24/7 through their website. A convenience fee of 2.35% is charged for credit/debit card payments. Electronic check payments may have different fee structures.

Q: How do special district taxes affect my bill? A: Properties located within municipalities, school districts, fire districts, or other special taxing areas pay additional taxes beyond the base county rate. Your total effective tax rate depends on all applicable taxing jurisdictions for your specific property location.

Q: How do I appeal my property assessment? A: Property owners who disagree with their assessment can file an appeal with the County Board of Assessment Appeals. Appeals must typically be filed within a specific timeframe after assessment notices are mailed, usually by a deadline in late spring or early summer.

Q: What happens if I have delinquent taxes from previous years? A: Current year taxes must be paid in full before any payments can be applied to prior year delinquent taxes. The county offers online arrangements for delinquent taxes, and properties with unpaid taxes may eventually be subject to tax sale procedures.

Q: Do I automatically receive available tax credits? A: No, most tax credits are not automatically applied. Property owners must file separate applications with required documentation to receive credits such as Homestead, Agricultural, Elderly, or Disability credits. Missing application deadlines may result in losing credits for that tax year.

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