Property tax in Charleston County, South Carolina

Who sends the property tax bill in Charleston County, and how do you pay it?

The bill comes from the Charleston County Treasurer's Office. The value it is based on is set by a separate office, the Charleston County Assessor's Office, which is who to ask if the value looks wrong. For how to look up and pay the bill, go to the county's own payment information.

Three county offices share the work: the Assessor values real estate and grants the 4% legal residence rate, the Auditor calculates the tax, mails the bills and handles the homestead exemption, and the Treasurer collects the payments. The bill combines county, school district, park and recreation, technical college and, where the home is inside one, city or special district taxes, plus a solid waste user fee on each home. Apply for the 4% legal residence rate by January 15 for it to count for that tax year; if you apply late in the year, pay the bill as issued and the difference is refunded once the application is approved. Card payments online go through the county's payment site and carry a surcharge. The county's countywide reassessment took effect with the 2025 bills.

When are property taxes due in Charleston County?

For the 2026 bill, Charleston County has one due date: January 15, 2027. Real property taxes for 2026 are due by January 15, 2027 without penalty. January 15, 2027 is a Friday. Under state law a mailed payment counts as paid on its U.S. postmark date. Owners who do not pay through a mortgage escrow account and have no unpaid tax bills can instead join the Treasurer's free Advance Property Tax Installment Plan: five equal advance payments due February 15, April 15, June 15, August 15 and October 15, based on the prior year's tax, with the balance due by January 15. Under state law, a 3% penalty is added if the bill is not paid by January 15, another 7% (10% in total) if it is not paid by February 1, and another 5% (15% in total) if it is not paid by March 16, when the bill goes to the county's Delinquent Tax Department. If tax notices go out late, the first penalty does not apply until 30 days after the notices are mailed. The Treasurer cannot accept a partial payment of a tax bill.

From Charleston County's published schedule, checked September 23, 2026. If a date falls on a weekend or holiday, the county's own rules on the next business day apply.

Estimate the property tax on a home in Charleston County

Enter a home's market value for a ballpark at Charleston County's average effective rate of 0.39% (Census). The real bill depends on the home's assessed value, the millage where it sits and any exemptions.

Property tax in Charleston County at a glance

Effective rate = median real estate taxes paid divided by median home value. Source: U.S. Census Bureau, American Community Survey 5-year estimates.

How does Charleston County compare in South Carolina?

Among South Carolina's 46 counties, Charleston County has the 43rd highest effective property-tax rate: 42 rank higher and 3 rank lower. That places it among the least taxed counties in the state. Nationally, it ranks 2950th of 3135 US counties by effective rate. See every South Carolina county ranked.

How much do homeowners in Charleston County actually pay?

The median is only the middle bill. Across Charleston County's 114,350 owner-occupied homes, 25.6% pay $3,000 or more a year in property tax, 45.8% pay at least $2,000, and 12% pay under $800. Another 1.8% report paying no property tax at all, which usually means an exemption covers the whole bill.

Owners with a mortgage pay a median of $1,989 and owners without one pay $1,661. Owners who have paid off a home have usually held it longer, and in states that cap how fast an existing owner's assessment can rise, long-held homes carry lower assessed values. Census table B25103.

How does the Charleston County property tax bill compare with local incomes?

The median property tax bill of $1,901 is about 1.7% of the median income of Charleston County homeowner households, $114,288 a year. That compares two middles, so a retiree in a long-held home can pay a far larger share. 63.9% of Charleston County's occupied homes are lived in by their owners; renters pay property tax too, just folded into rent.

Have property taxes gone up in Charleston County?

Yes. The median bill went from $1,428 in 2015-2019 to $1,901 in 2020-2024, a 33.1% rise. Over the same span the median home value moved 55%, from $315,600 to $489,100. Bills rose more slowly than values, which is what assessment caps and falling millage rates do: the county is taxing a smaller share of each home's worth.

Two Census ACS 5-year periods with no survey years in common, in each period's own dollars. A change counts only if it exceeds the combined 90% margin of error.

Property tax in counties next to Charleston County

Charleston County borders 4 counties.

How is a home assessed in Charleston County?

South Carolina assesses homes at 4% of market value in every county, Charleston County included. How South Carolina assesses and reappraises homes.

Is there a homestead exemption in Charleston County?

Not as a dollar amount. South Carolina owner-occupants get a 4% assessment ratio instead of 6% plus an exemption from school operating millage; apply for the 4% ratio with the county assessor. That is the South Carolina rule, and it applies in Charleston County. South Carolina's exemptions and relief programs in full.

On top of the South Carolina programs, Charleston County runs its own:

• Local Option Sales Tax credit: Charleston County voters approved a 1% local option sales tax, and the county says it returns all of that revenue to property owners as a credit on the tax bill, shown as the County Sales Tax Credit; state law requires at least 71%. It is applied automatically, and cities that take part can add a Municipal Sales Tax Credit on the same bill.

How to appeal your Charleston County property assessment

In Charleston County you appeal to the Charleston County Assessor's Office (written objection, then a written protest), then the Charleston County Board of Assessment Appeals. The deadline: If you receive an assessment notice, file a written objection with the Assessor by the deadline printed on it, usually 90 days (for some notices 30 days) after the notice is mailed. In a year with no notice, an objection filed by the last day to pay taxes without penalty (generally January 15, extended to the next working day when that date falls on a weekend or holiday) counts for that tax year; state law lets you file later, but it then counts for the next tax year. If the objection is not settled, you have 30 days after the conference with the Assessor to file a written protest, 30 days after the Assessor's written response to appeal to the Board of Assessment Appeals, and 30 days after the Board's decision to ask for a hearing before the South Carolina Administrative Law Court. An appeal does not extend the due date: pay the bill as issued, and any reduction is refunded automatically. How to file. Checked September 23, 2026 against the official appeal rules.

How South Carolina's appeal process works, including the next level if the first one turns you down.

South Carolina rules from primary state sources, reviewed September 7, 2026; sources on the South Carolina page.

Work out your own numbers

• How much house can I afford?

  Your income, debts and down payment against the 28/36 rule lenders actually use, with Charleston County's tax rate to hand.

• Mortgage calculator

  Monthly payment with principal, interest, tax and insurance, plus what an extra payment saves you.

• South Carolina income tax

  Brackets, standard deduction and what South Carolina actually taxes.

• Sales tax in Charleston County

  The other local tax: combined state and local rate for this county.