Williamson County Property Tax Calculator for Spring Hill (and the Maury Side)

1. Enter the price or, better, the county's appraised value. The example starts at $550,000.
2. Pick Williamson, Maury or Not sure. Not sure shows both sides with neither highlighted.
3. Pick inside or outside Spring Hill city limits. Outside means no city tax on either side.
4. Read the bill both ways. Add the address if you want it in your text to me, then tap Text me these numbers.

How this Williamson County property tax calculator does the math

Tennessee assesses a home at 25% of its appraised value, and the county and the city each charge a rate per $100 of that assessed value. So the formula is appraised value times 25%, divided by 100, times the combined rate.

These are the 2026 rates the calculator uses, per $100 of assessed value:

The Williamson rates come from the county's 2026 Property Tax Rates chart. Maury's $1.369 comes from Resolution 07-26-29, the county's tax levy for the fiscal year that began July 1, 2026. The city's $0.739 comes from Spring Hill Ordinance 26-09 and is the same on both sides of the county line.

The full explanation of the 2026 rates is on my Spring Hill property taxes page.

*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.*

Price and appraised value aren't the same number

The county taxes the appraised value its assessor puts on the house, which can differ from what you pay. If you're buying, the price is a fair stand-in for a first look. If you already own, use the county's appraised value.

2026 is Maury County's reappraisal year, and Williamson did its last county-wide reappraisal in 2025, so both sides of Spring Hill are working from recent values.

Two worked examples

A home appraised at $550,000 inside Spring Hill city limits is assessed at $137,500. On the Williamson side that's $1,746 in county tax plus $1,016 in city tax, about $2,762 a year or $230 a month. On the Maury side it's $1,882 plus the same $1,016, about $2,899 a year or $242 a month.

The Maury side runs about $136 a year more, roughly $11 a month, and the whole gap is the county rate. That's the example the calculator opens with.

A home appraised at $400,000 outside city limits is assessed at $100,000 and pays no city tax. That's $1,300 a year in unincorporated Williamson County (about $108 a month) and $1,369 in unincorporated Maury County (about $114 a month), a $69 a year difference.

Check the exact house

The ZIP won't tell you the county. 37174 covers both sides, and some homes inside Spring Hill city limits carry Thompson's Station 37179 addresses. My Williamson vs Maury County guide walks through where the line runs.

To check a house yourself, run it through the U.S. Census geocoder, which names the county and says "Spring Hill city" under Incorporated Places when the home is inside city limits. Then pull the parcel: the Williamson County Property Data Search for the Williamson side, and the state's Real Estate Assessment Data site for Maury parcels. Both let you look up the parcel record.

I live in Thompson's Station, in Williamson County, and I own a renovated historic investment property in Columbia, in Maury County. I've been a Realtor since 2013, and I work Spring Hill every week.

If you'd rather not dig, send me the address and I'll check which county it's in, pull the parcel and run the tax on that exact house. DM, text or call me at 615-392-1186.