Williamson County, TN Property Tax: 2026 Rates, Due Dates and Relief

Header photo: Williamson County Courthouse, Franklin, Tennessee, by Ichabod, via Wikimedia Commons, CC BY-SA 3.0

Quick answer (as of November 2026) For 2026, Williamson County's property tax rate is $1.30 per $100 of assessed value outside any city, and the total inside each town runs up to $2.2433 inside Franklin and the Franklin Special School District. Tennessee assesses a home at 25 percent of its appraised value, so a home appraised at $700,000 pays from about $2,275 to about $3,926 a year, depending on which line it sits on. The county mails bills in early October, 2026 taxes are due by February 28, 2027, and 1.5 percent interest starts March 1, 2027.

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Two Williamson County houses can carry the same price and tax bills about $1,650 a year apart. The difference is a town line and a school district line you can't see from the street, and a ZIP code won't show you either one.

That's why I check the tax line on every address before you write an offer. Below are the 2026 rates for every town in Williamson County straight from the county's chart, how the bill is figured, when it's due, and the relief and freeze programs for homeowners 65 and older, disabled homeowners and disabled veterans.

What is the Williamson County, TN property tax rate for 2026?

Williamson County's 2026 property tax rate is $1.30 per $100 of assessed value for a home outside any city. A home inside a city or town pays a county portion plus that town's rate, and the totals run from $1.403 in Thompson's Station to $2.2433 inside Franklin and the Franklin Special School District (FSSD).

These are the 2026 rates per $100 of assessed value, from the Williamson County Trustee's 2026 rate page and the county's 2026 Property Tax Rates chart:

The County Trustee collects the city tax for Franklin, Brentwood, Fairview, Nolensville and Thompson's Station along with the county tax. Spring Hill is the exception: the City of Spring Hill bills and collects its own $0.739. Inside Franklin and Spring Hill, the county portion is $1.27 instead of $1.30 because the county's $0.03 solid waste and sanitation levy isn't in that block of the chart.

Two lines moved for 2026. Fairview's city rate went from $0.5904 in 2025 to $0.8404, and the FSSD's general fund rate went from $0.4323 to $0.6123, which took the FSSD total from $0.5873 to $0.7673. The county rate, Franklin's $0.296, Brentwood's $0.19, Nolensville's $0.34 and Thompson's Station's $0.103 are the same as 2025.

College Grove has no town rate on the county's chart, so a College Grove home pays the county-only $1.30 unless its parcel sits inside the FSSD's area.

Property tax figures are the county and city rates published for the year shown and are for planning only. Your actual bill depends on the assessed value, any exemptions and the city or district the home sits in. Confirm with the county assessor or trustee and your tax professional before you rely on a number.

How is Williamson County property tax calculated?

Williamson County property tax is the assessed value divided by 100, times the rate. For a home, the assessed value is 25 percent of the appraised value the Williamson County Assessor of Property sets. Here's the order:

1. The Assessor sets the appraised value, its estimate of fair market value, which the office defines as what the property would sell for in an open market under normal conditions. That number can differ from the price you pay.
2. Multiply by 25 percent. Tennessee law sets that assessment ratio for residential property, according to the Tennessee Comptroller.
3. Divide the assessed value by 100 and multiply by the total rate for the home's line in the table above.

On a home appraised at $700,000, the assessed value is $175,000. At Thompson's Station's $1.403, that's $175,000 divided by 100, times 1.403, or about $2,455 a year. I live in Canterbury, inside the Town of Thompson's Station, so that's the line my own street is on. Across Williamson County, the 2026 rates work out to about 0.33 to 0.56 percent of appraised value a year.

The Assessor mails an Assessment Change notice in May to every owner whose value changed. If you think the value is wrong, the Assessor's FAQ says to call the office first at 615-790-5708, then make an appointment with the County Board of Equalization if you're still not satisfied. Appointments are set by calling the first week of June.

On a new build, the Assessor's staff track building permits, completion notices and sales to pick up new construction, according to the county's Appraisal Process page. Before you budget off a new home's last bill, ask what that bill covered. My guide to new homes in Williamson County shows which town each community sits in, so you can match it to the right line.

How often does Williamson County reappraise property?

Williamson County's last county-wide reappraisal was in 2025, and the next one is scheduled for 2028, on a three-year cycle, according to the Tennessee Comptroller's reappraisal schedule as of November 2026. The county's 2026 rate chart marks 2025 as the reappraisal year.

After a reappraisal, the State Board of Equalization gives each county and city a certified tax rate, according to the Comptroller. Williamson's county rate went from $1.88 in 2024 to $1.30 in the 2025 reappraisal year, and it's $1.30 again for 2026. Values were reset the same year, so a lower rate by itself doesn't tell you what happened to any one home's bill. On a house you're serious about, look at its last two bills side by side.

What would a $700,000 home pay in each Williamson County town?

A home appraised at $700,000 in Williamson County pays from about $2,275 a year outside any city to about $3,926 a year inside Franklin and the Franklin Special School District, at 2026 rates. That's an illustration on one round number, not a quote on any real house. It assumes the Assessor's appraised value is exactly $700,000, which makes the assessed value $175,000.

On the same $700,000, the gap between the lowest and highest line is about $1,651 a year. Inside Franklin alone, the FSSD line adds about $1,185 a year over a Franklin home outside the district. Spring Hill's figure is the Williamson side only; my Spring Hill property tax guide covers the Maury side and the city's own bill, and the property tax calculator runs any price for either side. The county's 2026 rates and calculator page runs every Williamson line.

Found a house and not sure which line it's on? Send me the address and I'll tell you the county, the town, the school district line and what the 2026 bill works out to. DM me, text or call 615-392-1186.

Property tax figures are the county and city rates published for the year shown and are for planning only. Your actual bill depends on the assessed value, any exemptions and the city or district the home sits in. Confirm with the county assessor or trustee and your tax professional before you rely on a number.

When are property taxes due in Williamson County?

Williamson County property taxes are due from the first Monday in October through February 28 of the following year. Bills are mailed in early October, and on March 1, 1.5 percent interest is added, then more on the first of each month, according to the Williamson County Trustee's FAQ. For the 2026 tax year, that means paid by February 28, 2027, and delinquent on March 1, 2027.

The Trustee's rules that most often surprise new owners:

• Partial payments are accepted, but the Trustee has no authority to waive any tax or interest.
• The annual tax covers January 1 through December 31.
• The bill goes to whoever owned the home on January 1. If you bought during the year, the seller got the bill, and the Trustee says it's the seller's responsibility to forward it to you.
• If your mortgage company pays the tax from escrow, the bill you get in the mail is for your records.

Inside Spring Hill city limits, the city's own bill comes separately from the county's. My Spring Hill property tax guide covers that one.

What tax relief and tax freeze programs does Williamson County offer?

Williamson County homeowners can apply for four programs through the County Trustee: state tax relief for low-income homeowners 65 and older or disabled, state tax relief for disabled veterans and their surviving spouses, the county's Broad Base Tax Relief for homeowners 65 and older, and the county's Property Tax Freeze. Each one applies only to the home you own and live in. These are the 2026 rules, from the Trustee's 2026 tax relief brochure and the Comptroller's 2026 Property Tax Relief brochure:

State tax relief is a reimbursement, not an exemption. The Comptroller says you still get your bill and still pay it. Disabled veterans apply with the state's F-16 consent form, and a surviving spouse uses the F-16S. I'm a Coast Guard veteran myself, and my guide to Tennessee veteran property tax relief in Williamson County covers the veteran program in more detail.

The Williamson County Property Tax Freeze is open to homeowners 65 or older on or before December 31, 2026, with combined 2025 income of $69,150 or less. It freezes the tax on your home at the amount owed in the year you first qualify, and you reapply every year. Once you qualify, your tax on the home generally won't change, even after a rate increase or a county-wide reappraisal, as long as you reapply every year, according to the Comptroller's Property Tax Freeze page. The base changes if you make improvements that raise the value, or if you sell and buy another home. Land over five acres isn't covered: the Assessor figures the base on the home and up to five acres.

The freeze is adopted town by town. On the Comptroller's 2026 list, Williamson County has it, and so do the cities of Fairview and Spring Hill. Franklin, Brentwood, Nolensville and Thompson's Station aren't on the city list, so ask the Trustee's office how the freeze applies to your city portion.

To apply, call the Trustee's office at (615) 790-5709 for an appointment. Appointments are required. You can apply after you get your 2026 bill and until April 5, 2027 for relief on 2026 taxes, and the tax has to be paid in full first. Bring proof of income for everyone on the application: Social Security benefit statements and signed federal returns with every 1099. The office counts income from all sources, not adjusted gross income.

Property tax figures are the county and city rates published for the year shown and are for planning only. Your actual bill depends on the assessed value, any exemptions and the city or district the home sits in. Confirm with the county assessor or trustee and your tax professional before you rely on a number.

Where do I look up or pay a Williamson County property tax bill?

You can look up and pay a Williamson County property tax bill online through the Trustee's Search & Pay Taxes portal. Processing fees apply to every electronic payment, online or in the office, and the county says it doesn't get any of that fee.

To pay another way, the Trustee's Payment Options page lists:

• By mail to the Williamson County Trustee, 1320 West Main St., Suite 203, Franklin, TN 37064.
• The checks-only drop box outside the West Entrance of the County Administrative Complex at 1320 West Main St.
• In person at the Trustee's office, Suite 203 on the second floor, by check, cash or credit card.

For the appraised value and the parcel record, use the Assessor's Property Data Search. For a mailing address change or a question about the value, call the Assessor of Property at 615-790-5708.

How do I know which tax line a Williamson County house is on?

The town limits and the school district line decide a Williamson County home's rate, and the mailing address doesn't always match either one. Some homes with Thompson's Station 37179 addresses sit inside Spring Hill city limits, and some with Franklin addresses sit inside Thompson's Station.

Here's how to check an address:

1. Run it through the U.S. Census geocoder. Under "Incorporated Places," it names the city or town the home is inside, if any.
2. Look up the parcel on the Assessor's Property Data Search.
3. In Franklin, or near it, ask the Assessor's office whether the parcel is on an FSSD line, since that's the biggest swing in the table.

My town guides for Franklin, Thompson's Station, College Grove, Brentwood, Nolensville and Fairview cover the rest of the picture, and my Williamson County page ties them together. If you're weighing Franklin's other monthly costs, see the cost of living in Franklin.

Moving to Williamson County from another state?

If you're buying from out of state, the tax line is one more thing a listing photo won't show you, so I check it on every house you send me. When you can't get here, I'll record a walkthrough of the house and send you an unlisted YouTube link, so you can rewatch it as many times as you need.

For the rest of the move, start with my moving to Tennessee guide, read how I work with out-of-state buyers, or see how to buy a house in Tennessee from another state. Veterans and military families can start on my veterans page.

Send me the addresses you're looking at, even a long list, and I'll send back the 2026 tax math on each one. DM me, text or call 615-392-1186.

Frequently asked questions

What is the property tax rate in Williamson County, TN for 2026?

Williamson County's 2026 property tax rate is $1.30 per $100 of assessed value for a home outside any city. A home inside a city or town pays a county portion plus that town's rate, and the totals run from $1.403 in Thompson's Station to $2.2433 inside Franklin and the Franklin Special School District (FSSD).

How is Williamson County property tax calculated?

Williamson County property tax is the assessed value divided by 100, times the rate. For a home, the assessed value is 25 percent of the appraised value the Williamson County Assessor of Property sets.

When are property taxes due in Williamson County?

Williamson County property taxes are due from the first Monday in October through February 28 of the following year. For the 2026 tax year, that means paid by February 28, 2027, and delinquent on March 1, 2027.

How often does Williamson County reappraise property?

Williamson County's last county-wide reappraisal was in 2025, and the next one is scheduled for 2028, on a three-year cycle, according to the Tennessee Comptroller's reappraisal schedule as of November 2026.

Is there a property tax freeze for seniors in Williamson County?

Yes. The Williamson County Property Tax Freeze is open to homeowners 65 or older on or before December 31, 2026, with combined 2025 income of $69,150 or less. It freezes the tax on your home at the amount owed in the year you first qualify, and you reapply every year.

Where do I look up or pay a Williamson County property tax bill?

You can look up and pay a Williamson County property tax bill online through the Trustee's Search & Pay Taxes portal. Processing fees apply to every electronic payment, online or in the office, and the county says it doesn't get any of that fee.