2026 fiscal calendar
Know the tax date before it becomes a penalty date.
Tax bills, payment rules, and valuation-review windows are controlled by the local jurisdiction and the governing state framework. The verified record below separates published figures from dates that require confirmation with Aiken County Assessor's Office.
Effective rate
South Carolina property-tax millage varies by county, municipality, school district, and tax district; no single Aiken County effective rate is published.
Statement mailing
October 2026; Aiken County states 2026 tax bills will be mailed separately in October after reassessment notices are mailed in the first week of July.
Payment deadline
For the 2026 tax year, South Carolina property taxes are due by January 15, 2027 without penalties. Aiken's official page also states delinquent-property payments are accepted online through October 23, 2026 at 5:00 p.m. and in-office through October 30, 2026 at 5:00 p.m. for the applicable delinquent cycle.
Valuation protest
Within 90 days of the date on the 2026 assessment notice; Aiken County's 2026 notices are mailed during the first week of July, so the notice date controls the objection deadline.
Critical payment warning
Do not assume a grace period.
The verified county record identifies the payment timing above but does not establish a universal penalty schedule for this page. Late charges, interest, collection costs, tax-sale procedures, and lien or foreclosure timelines can depend on state law and the local collector’s process. If the deadline is close or a balance is delinquent, contact the tax collector directly and request the current payoff amount in writing.
Treat the published payment deadline as a hard operational date and retain your receipt or confirmation number.
Read the calendar in order
From assessment to collection
1. Valuation and notice
Review the assessment notice as soon as it arrives. The protest window may run from the notice date rather than from the payment due date.
2. Statement and account review
Match the tax statement to the parcel or account number and confirm exemptions, assessed value, taxing units, credits, and balance.
3. Payment confirmation
Use the official collector channel, then save the receipt, transaction reference, and date posted. A bank submission is not always the same as a county posting date.