Sullivan County TN Property Tax: Pay Online, Search Taxes, Calculate Your Bill & Avoid March Penalty
Need to pay a Sullivan County property tax bill, check the county tax rate, use partial payments, apply for tax relief, confirm an assessment, or understand what happens after taxes become delinquent? Start with the right office: the Trustee collects county taxes, the Property Assessor values and classifies property, and Chancery Court handles older delinquent taxes after transfer.
What Sullivan County taxpayers usually need first
Use this action board before clicking around. Most confusion comes from mixing up the Trustee, Assessor and Chancery Court roles.
Fast action board
- 1Need to pay current county property tax? Start with the Sullivan County Trustee. County taxes are collected during the payment period from the first Monday in October through the last day of February.
- 2Want to split payments? Sullivan County allows multiple partial payments between October 1 and February 28 without interest penalty. Track your balance because monthly bills are not mailed.
- 3Missed February? On March 1, taxes become delinquent and begin accruing 1.5% interest per month.
- 4Wrong value, owner, classification or map issue? Contact the Sullivan County Property Assessor. The Trustee cannot change the assessed value.
- 5Older delinquent taxes? After the Trustee’s collection period, unpaid taxes can transfer to Chancery Court, where court costs and attorney fees may be added.
Official pages to keep open
Assessor values
Discovers, lists, classifies and values real/personal property.
Commission sets rate
County tax rate is set annually by the Board of Commissioners.
Trustee collects
Notices are mailed as a courtesy; payment window starts in October.
Chancery later
Older unpaid taxes may move to Chancery Court with added costs.
How to pay Sullivan County TN property taxes
Choose the payment method based on deadline, fees, whether you need tax relief handling and whether the account is current or delinquent.
| Payment Method | Official Detail | Best For |
|---|---|---|
| Online | Trustee links to CitiSen portal. Pay by credit card, debit card or e-check. | Fast current-year payment before 11:59 p.m. deadline. |
| Phone | Call 888-382-2315. Additional phone charge may apply. | Payment by phone with tax notice/account details ready. |
| Sullivan County Trustee, PO Box 550, Blountville, TN 37617. Make checks payable to Sullivan County Trustee and include phone number. | Check payment when not near deadline. | |
| Drop box | Sullivan County Courthouse, 3411 Hwy 126, Blountville; on left side near alleyway. | After-hours local payment drop-off. |
| Trustee office | Blountville year-round; Bristol and Kingsport seasonal satellite offices. | Questions, relief paperwork, partial payment or direct help. |
| Bank of Tennessee | Accepted at listed bank locations during the announced payment season; cash/check only; must bring tax notice. | Simple full or regular payment, not relief/delinquent/partial payments. |
1Find the correct tax notice or account firstDo not use last year’s tax identification number.▾
The Trustee FAQ warns that tax identification numbers change each year. If using bank bill pay, use the current-year tax identification number from the current notice so your payment is not applied to the wrong property.
2Review the payment feeThe county does not keep the convenience fee.▾
Current Trustee fees are 2.5% for credit/debit cards and $1.25 for e-checks. Phone payments may add an extra charge. Visa, Mastercard and Discover are accepted; American Express and installment-payment cards such as Klarna/Affirm/Sezzle/SplitIt/Chime-style cards are not accepted.
3Save proof immediatelyPosting may not match the payment date.▾
The Trustee says the electronic confirmation page date is the official payment date. Online payment may show pending quickly, but posting to the official tax record can take several business days.
Sullivan County property tax dates, notices and penalties
The most important rule: not receiving a bill does not remove your duty to pay.
| Date / Period | Official Detail | What To Do |
|---|---|---|
| Late September | Trustee usually mails county tax notices as a courtesy. | If you moved, bought property or use escrow, verify your account anyway. |
| First Monday in October | County tax payment period begins. | Start payment, partial payment or relief paperwork early. |
| October 1–February 28 | Partial payments are allowed during this period without interest penalty. | Track your balance; the office does not send monthly bills. |
| Last day of February | Last regular day to pay county taxes without delinquent interest. | Pay before March 1; confirm payment method cutoffs. |
| March 1 | County taxes become delinquent and begin accruing 1.5% interest per month. | Call Trustee for payoff if you miss February. |
| After Trustee period | Unpaid taxes may transfer to Chancery Court with court costs and attorney fees. | Resolve with Trustee before transfer when possible. |
How to estimate Sullivan County property tax
Use this to understand your bill. The official tax record is the final amount due.
| Bill Part | Official Meaning | Where To Check |
|---|---|---|
| Full property value | Value set by the Property Assessor. | Assessor / Tennessee Property Assessment Data. |
| Residential assessment ratio | Trustee FAQ example uses 25% of full property value for residential assessed value. | Assessor classification and tax record. |
| County tax rate | 2025 county rate listed as $1.6129 per $100 of assessed value. | Trustee FAQ / current-year county rate. |
| City taxes | Property inside city limits may also owe city property taxes. | City recorder / city tax office. |
| Interest | 1.5% per month after March 1 on delinquent county taxes. | Trustee payoff or Chancery payoff if transferred. |
Step 1
Full value × 25% = assessed value for the residential example used by the Trustee.
Step 2
Assessed value ÷ 100 = taxable units.
Step 3
Taxable units × current county rate = estimated county tax before city taxes, relief or penalties.
Assessor, property records, value questions and reappraisal
If the value, classification, ownership or map data is wrong, start with the Property Assessor—not the Trustee.
Assessor role
Discovers, lists, classifies and values real and personal property in Sullivan County.
Records maintained
Ownership records, assessment maps, tax rolls, local/state equalization reporting and Greenbelt/Forestry assessments.
2027 reappraisal
The Assessor page states the next state-mandated countywide reappraisal is scheduled for 2027.
Does not collect
The Assessor does not set the tax rate, send tax bills or collect property taxes.
Assessment data
Tennessee Property Assessment Data can be searched by address, owner name or parcel ID for Sullivan and other Tennessee counties.
Contact
Sullivan County Property Assessor: 3411 Hwy. 126, Suite 103, Blountville, TN 37617. Phone: 423-323-6455.
1Search the assessment recordUse owner, address or parcel ID.▾
Use Tennessee Property Assessment Data. Select Sullivan County and search by property address, owner name or parcel ID.
2Check property facts before disputingWrong square footage or class can affect taxes.▾
Look for ownership, property address, parcel ID, classification, land details, building data and sale history. Gather documents before contacting the Assessor.
3Contact the Assessor if value or classification is wrongThe Trustee cannot change the assessment.▾
Prepare parcel ID, photos, deed, closing statement, building details, comparable sales or any evidence showing the assessment record is incorrect.
Sullivan County property tax relief assistance
The State of Tennessee offers property tax relief for certain qualifying homeowners who own and live in their primary residence. Sullivan County processes local assistance through the Trustee’s office.
Elderly homeowner
Trustee page lists homeowners age 65+ with total combined household 2024 income of $37,350 or less as a qualifying category for the stated relief year.
Disabled homeowner
Disabled homeowners recognized by the Social Security Administration may qualify if they meet the income limit and other requirements.
Disabled veteran / widow(er)
Permanently 100% disabled veterans as determined by Veterans Affairs, or qualifying widow(er)s, may qualify under state relief rules.
Voucher must return yearly
Returning applicants must return the signed State Tax Relief voucher to the Trustee’s office each year or the state may void the credit.
Bank locations do not accept vouchers
Tax relief vouchers must be mailed or delivered to the Trustee’s office, not Bank of Tennessee payment locations.
Relief phone help
Call 423-323-6470 or 423-323-6469 for tax relief questions or appointments.
Partial payments, prepayments and escrow mistakes
Sullivan County is more flexible than many users expect, but you must track the details yourself.
Partial payments allowed
You may break the annual payment into multiple installments between October 1 and February 28.
No monthly bills
The Trustee says the taxpayer is responsible for tracking remaining balance and payment records.
How to pay partials
Partial payments may be made by mail, online or at the Trustee’s office during the allowed period.
Prepayment ACH
Taxpayers may choose monthly ACH draft prepayment. Call 423-323-6464, option 2, for details.
Mortgage escrow
If escrow pays taxes, confirm the mortgage company received the bill and payment posted. You remain responsible for timely payment.
Bank payment limit
Bank of Tennessee locations do not accept tax relief, delinquent or partial payments.
What happens if Sullivan County property taxes are delinquent?
Delinquent taxes get more expensive over time. The best move is to resolve with the Trustee before the file moves to Chancery Court.
| Stage | What Happens | Action |
|---|---|---|
| March 1 | County taxes become delinquent and 1.5% monthly interest begins. | Contact Trustee for payoff and payment options. |
| Through Trustee period | Recent delinquent taxes may still be handled through Trustee before transfer. | Pay before transfer if possible to avoid additional costs. |
| Transfer to Chancery | Chancery FAQ says unpaid taxes are filed about one year following delinquency. | Contact Clerk and Master / Chancery Court for payoff. |
| Added costs | Court costs of $44 and a 10% attorney fee of base tax are added when filed; 1.5% monthly penalty/interest continues. | Do not guess; request exact payoff. |
| Tax sale risk | Chancery Court generally holds two delinquent tax sales per year at public auction. | Property owner may pay the amount owed up to the time of sale. |
Sullivan County tax offices, phone numbers and map
Use the correct location based on season and service. Satellite offices are seasonal, while Blountville is open year-round.
Trustee — Blountville main office
3411 TN-126, Suite 104
Blountville, TN 37617
First floor of the historic Sullivan County Courthouse.
Hours: Monday–Friday, 8 a.m.–5 p.m.
Phone: 423-323-6464
Trustee — Bristol satellite
801 Anderson St, Room 139
Bristol, TN 37620
Open Oct. 1–Mar. 13; Thursday & Friday, 8 a.m.–5 p.m.; closed lunch 1:30–2:30 p.m.
Phone: 423-354-7037
Trustee — Kingsport satellite
225 West Center Street #101
Kingsport, TN 37660
Open Oct. 1–Mar. 13; Monday–Wednesday, 8 a.m.–5 p.m.; closed lunch 1:30–2:30 p.m.
Phone: 423-354-7036
Property Assessor
3411 Hwy. 126, Suite 103
Blountville, TN 37617
Hours: Monday–Friday, 8 a.m.–5 p.m.
Phone: 423-323-6455
Map to Sullivan County Courthouse / Trustee / Assessor
The Trustee main office and Property Assessor are both in the Blountville courthouse area, but in different suites. Confirm the right suite before visiting.
Official Sullivan County property tax links
Use these for final actions only: payment, tax relief, assessment lookup, property value questions or delinquent-tax payoff.
Sullivan County TN property tax FAQs
Short answers for property owners, buyers, escrow users, seniors and anyone trying to avoid penalties.
QHow do I pay Sullivan County property taxes online?▾
Start at the official Sullivan County Trustee property tax page. The Trustee links to CitiSen for online payment by card or e-check.
QWhen are Sullivan County property taxes due?▾
The county payment period begins on the first Monday in October and continues through the last day of February. Taxes become delinquent March 1.
QWhat happens if I miss February 28?▾
Interest begins March 1 at 1.5% per month. The Trustee cannot waive interest except through a court order or qualifying assessment change.
QCan I make partial payments?▾
Yes. Multiple partial payments are allowed between October 1 and February 28. You must track the remaining balance because the office does not send monthly bills.
QWhat are online payment fees?▾
Current fees listed by the Trustee are 2.5% for credit/debit cards and $1.25 for e-checks. Phone payments can add an extra charge.
QWhat is the 2025 county tax rate?▾
The Trustee FAQ lists the 2025 Sullivan County tax rate as $1.6129 per $100 of assessed value. Verify the current year before estimating.
QWho sets my property value?▾
The Sullivan County Property Assessor sets and maintains property values, ownership records, maps and tax rolls. The Trustee collects taxes but does not set values.
QWhat if I bought property during the year?▾
The owner of record on January 1 generally receives the notice, but new owners remain responsible for timely payment. Check your settlement statement and verify payment with the Trustee.
QCan I pay at Bank of Tennessee?▾
Yes, during the listed payment period and only at listed branches. Bring the tax notice. Cash/check only; no tax relief, delinquent or partial payments are accepted there.
QIs this an official county website?▾
No. PropertyTaxUSA.org is independent. Verify balances, deadlines, rates, tax relief, assessment records and delinquent status with official Sullivan County offices.
Bottom line
For Sullivan County TN property tax, think: Assessor values the property, County Commission sets the rate, Trustee collects the tax, and Chancery Court handles older delinquent cases. Pay before March 1, use current-year tax identification numbers, save confirmation proof and contact the correct office before a small issue becomes a penalty problem.
Independent guide notice: This page is informational only and is not Sullivan County, the Trustee, the Property Assessor, Chancery Court, CitiSen, Bank of Tennessee, the State of Tennessee or legal advice.