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Sullivan County property tax

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Check the official source for your next due date. Published past dates remain in the installment timeline.

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The penalty-free cutoff is not yet verified. Confirm payment terms with your county.

Read the county’s exact wording

County weekend and holiday rule

The state calendar lists March 1 as the ordinary delinquency date for the preceding tax year. Confirm the 2027 weekend payment cutoff with the Trustee.

March 1 | Delinquency date for preceding year's taxes. | 67-5-2010(a)(1)

Confirm payment terms with the official source

Not tax or legal advice; confirm with your county. Dates are shown as published by the source.

Installment timeline

2026

Due dates and filing windows, in one view.

Sources. Checked .

Today:

    Assessment notice

    State assessment calendar: value-change notices are mailed by May 20.

    Set by law

    Appeal timing based on your notice

    General state Board of Equalization deadline: later of August 1 or 45 days after county-board action notice was sent.

    Officially published

    How to pay

    Sources. Checked .

    Payment methods

    In person, Online card or electronic check, Phone, Mailed check, Drop box

    Officially published

    Fees

    Cards 2.5%; e-check $1.25; phone payments add $0.30.

    Officially published

    Late payments and penalties

    Sources. Checked .

    The Trustee states county taxes become delinquent March 1 and accrue 1.5% interest per month; confirm the current bill’s final payment cutoff.

    Officially published

    A numerical example is unavailable without a verified single percentage and unit. Use the published rule or ask the county for a payoff amount.

    Assessment appeals

    Sources. Checked .

    General state Board of Equalization deadline: later of August 1 or 45 days after county-board action notice was sent.

    Officially published

    Exemptions

    Sources. Checked .

    Property Tax Relief

    Who may qualify

    Low-income elderly/disabled homeowners and eligible disabled veterans or surviving spouses; reimbursement program, not exemption.

    Officially published

    Official exemption information

    Official exemption information

    Officially published

    County offices

    Sources. Checked .

    Sullivan County Trustee

    collector

    Officially published

    Phone

    423-323-6464

    Officially published

    Official office website

    Official office website

    Officially published

    Sullivan County Property Assessor

    assessor

    Officially published

    Phone

    423-323-6455

    Officially published

    Official office website

    Official office website

    Officially published

    Common questions

    Sources. Checked .

    Where can I pay Sullivan County property tax?

    Use the official payment portal: https://www.citisenportal.com/. In person, Online card or electronic check, Phone, Mailed check, Drop box

    What is the late-payment penalty for Sullivan County property tax?

    The Trustee states county taxes become delinquent March 1 and accrue 1.5% interest per month; confirm the current bill’s final payment cutoff.

    Does Sullivan County charge a fee to pay property tax online?

    Cards 2.5%; e-check $1.25; phone payments add $0.30.

    When can I appeal my Sullivan County assessment?

    General state Board of Equalization deadline: later of August 1 or 45 days after county-board action notice was sent.

    Sources

    Sources. Checked .

    Read the source quotations (15)
    https://www.comptroller.tn.gov/office-functions/pa/property-taxes/assessment-schedule.html
    Current year's taxes become due and payable on the first Monday in October.

    Checked .

    https://www.comptroller.tn.gov/office-functions/pa/property-taxes/property-tax-programs/tax-relief.html
    Property Tax Relief

    Checked .

    https://www.comptroller.tn.gov/office-functions/pa/property-taxes/property-tax-programs/tax-relief.html
    Tennessee state law provides for property tax relief for low-income elderly and disabled homeowners, as well as disabled veteran homeowners or their surviving spouses.

    Checked .

    https://www.comptroller.tn.gov/office-functions/pa/property-taxes/assessment-schedule.html
    General deadline for appeals to the SBOE is August 1 or within forty-five days of the date that the notice of the County Board action was sent, whichever is later.

    Checked .

    https://www.comptroller.tn.gov/office-functions/pa/property-taxes/assessment-schedule.html
    May 20 | Assessments should be complete and change notices mailed. | 67-5-504(b) and 67-5-508(a)(1) & (3)

    Checked .

    https://sullivantntrustee.gov/property-tax/
    Sullivan County Trustee

    Checked .

    https://sullivantntrustee.gov/property-tax/
    423-323-6464

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    https://sullivancountytn.gov/property-assessor/
    Property Assessor

    Checked .

    https://sullivancountytn.gov/property-assessor/
    423-323-6455

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    https://sullivantntrustee.gov/property-tax/
    Pay Now

    Checked .

    https://sullivantntrustee.gov/property-tax/
    In Person at Trustee’s Office Payable by credit card, debit card, or electronic check. Phone Payments Mail Drop Box:

    Checked .

    https://sullivantntrustee.gov/property-tax/
    Current fees are: 2.5% for credit and debit cards, $1.25 for e-checks. Additional $.30 charge for phone payments.

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    https://sullivantntrustee.gov/property-tax/
    On March 1, County taxes become delinquent and begin to accrue 1.5% interest per month.

    Checked .

    https://www.comptroller.tn.gov/office-functions/pa/property-taxes/assessment-schedule.html
    Current year's taxes become due and payable on the first Monday in October. Last day to pay preceding year's taxes without interest.

    Checked .

    https://www.comptroller.tn.gov/office-functions/pa/property-taxes/assessment-schedule.html
    March 1 | Delinquency date for preceding year's taxes. | 67-5-2010(a)(1)

    Checked .

    How we verified this page

    Official sources, verification dates and corrections

    County notes

    Additional payment and filing conditions

    Sources. Checked .

    The state calendar lists March 1 as the ordinary delinquency date for the preceding tax year. Confirm the 2027 weekend payment cutoff with the Trustee.

    Set by law

    Current year's taxes become due and payable on the first Monday in October.

    Set by law

    Current year's taxes become due and payable on the first Monday in October. Last day to pay preceding year's taxes without interest.

    Set by law

    Property tax in Sullivan County: county, state and US

    Compare Census estimates and read the sampling notes

    Sources. Checked .

    Census ACS 2020–2024 estimates for owner-occupied homes. The median annual tax paid is a historical survey estimate, not a quote for this year’s bill.

    AreaMedian annual tax paidMedian home valueEffective rate estimate
    Sullivan County$1,234 $213,300 0.58%
    Tennessee$1,442 $286,700 0.50%
    United States$3,119 $332,700 0.94%

    Sullivan County’s effective-rate point estimate is 0.08 percentage points above Tennessee’s and 0.36 percentage points below the US estimate.

    Effective rate = median annual real estate taxes paid (B25103) ÷ median owner-occupied home value (B25077). State and US figures use their own Census medians, not averages of counties. These ratios are not rates set by law or medians of individual tax rates. Differences are not tests of statistical significance. Bounded or missing estimates stay unavailable.

    Census sources, quotations and sampling uncertainty

    Sullivan County

    Annual taxes: $1,234 (90% margin of error: ±$34). Census table B25103_001E.

    0500000US47163|1234|34|1329|48|1130|47

    Home value: $213,300 (90% margin of error: ±$6,300). Census table B25077_001E.

    0500000US47163|213300|6300

    Estimated effective rate: 0.58%. Census source.

    0500000US47163|1234|34|1329|48|1130|47

    Tennessee

    Annual taxes: $1,442 (90% margin of error: ±$8). Census table B25103_001E.

    0400000US47|1442|8|1585|13|1258|11

    Home value: $286,700 (90% margin of error: ±$1,492). Census table B25077_001E.

    0400000US47|286700|1492

    Estimated effective rate: 0.50%. Census source.

    0400000US47|1442|8|1585|13|1258|11

    United States

    Annual taxes: $3,119 (90% margin of error: ±$4). Census table B25103_001E.

    0100000US|3119|4|3489|4|2576|4

    Home value: $332,700 (90% margin of error: ±$236). Census table B25077_001E.

    0100000US|332700|236

    Estimated effective rate: 0.94%. Census source.

    0100000US|3119|4|3489|4|2576|4

    Guides and related dates

    Sullivan County property tax calculator

    Estimate your bill, check exemptions and compare counties

    Tools: Sullivan County, TN

    Property tax calculator

    Estimated annual property tax $1,234

    $213,300 home value × 0.58% Census effective rate ≈ $1,234 per year. Uses the unrounded ratio; your actual bill may differ.

    Estimate only. Not tax, legal or financial advice; confirm with your county.

    Starts at the Census median for Sullivan County, TN.

    Math and official Census sources

    $1,234 median annual tax ÷ $213,300 median home value = 0.58%. Census ACS 2020–2024; a historical survey ratio, not a parcel tax rate.

    0500000US47163|213300|6300

    Census source. Last verified 2026-10-24.

    0500000US47163|1234|34|1329|48|1130|47

    Census source. Last verified 2026-10-24.

    Full Sullivan County, TN calculator: exemptions, rates, dates and reminders

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    Prorated property tax calculator

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    Millage rate calculator

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    Nearby counties and other due dates

    Nearby counties

    Related counties in the same Census area: Kingsport-Bristol, TN-VA (Metropolitan Statistical Area).

    Why these counties are listed

    Census delineation, verified October 24, 2026.

    28700 | Kingsport-Bristol, TN-VA | Metropolitan Statistical Area | Sullivan County | Tennessee | 47 | 163

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    Other counties in Tennessee due soon

    Published payment dates in the next 60 days.

    No other county payment dates are verified here for this period. Check the county’s official site.

    What's next for you

    Sullivan County, TN

    Next date: Not yet announced.

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    Check the official source

    Reminders for your county

    Sullivan County, TN. Calendar alerts are set for 14, 3 and 1 day before each verified due date.

    No upcoming verified due date yet. This calendar updates when we publish verified dates for Sullivan County.

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