Franklin TN Property Taxes: The Complete Williamson County Guide (2026)
Tennessee has no state income tax — most relocators know this. What fewer realize is that the state's property tax structure is also unusually buyer-friendly, and Williamson County's effective rates are meaningfully below national averages despite Franklin's high home values. Combined, the tax math is one of the strongest financial arguments for the move.
Here's an honest, plain-English guide to how property taxes actually work in Franklin and Williamson County, what they'll cost you on a typical home, when they're due, and how to think about reassessment over time.
The 30-second answer
For 2026 tax year:
- Williamson County tax rate: approximately $1.78 per $100 of assessed value
- City of Franklin tax rate: approximately $0.32 per $100 of assessed value (for homes inside Franklin city limits)
- Combined Franklin city + Williamson County rate: approximately $2.10 per $100 of assessed value
- Williamson County only (unincorporated areas, or smaller towns like Thompson's Station): roughly $1.78 + the small municipal rate (or $0 outside any city limit)
- Residential assessment ratio: 25% of appraised value (a Tennessee state statute)
Translation: On a $900,000 home in Franklin city limits, your annual property tax is roughly:
$900,000 x 25% = $225,000 assessed value $225,000 / $100 = 2,250 2,250 x $2.10 = approximately $4,725/year
Effective rate works out to roughly 0.52% of market value for in-city Franklin homes — and even lower for unincorporated Williamson County addresses. This is well below the national average (roughly 0.99%) and far below high-tax states like New Jersey (2.2%+), Illinois (2.0%+), and Connecticut (1.7%+).
Verify the current year's exact rate with the Williamson County Trustee or the City of Franklin before relying on these figures — rates are set annually and shift modestly.
How Tennessee assesses residential property
This is the single most misunderstood part of Tennessee's property tax system, and it's where the math gets favorable.
Tennessee assesses residential real property at 25% of appraised value, not 100%. This is set by state statute and applies to every county.
In most other states (Massachusetts, New Jersey, California, etc.), property is assessed at full market value or close to it. The headline tax rate looks lower in those states only because their assessment base is 4x higher.
The practical result: when you compare Tennessee's nominal rates to other states, you have to multiply Tennessee's effective rate by four to compare apples to apples. A 2.10% nominal rate in Tennessee is equivalent to a 0.52% rate in a state that assesses at full market value.
For a buyer running tax comparisons, focus on effective rate (annual tax / market value) — not nominal rate. Tennessee's effective rate in Williamson County (approximately 0.50–0.65% depending on city/township) is one of the lowest in the country for a high-value housing market.
What's included in the rate
The Williamson County rate funds:
- Williamson County Schools — the largest line item by a wide margin (typically 60–70% of the county tax)
- General county operations — courts, sheriff's office, public works, parks
- County debt service — capital projects, bond payments
- Specific funds — solid waste, libraries, etc.
The City of Franklin rate funds Franklin-specific services: police (city), fire, parks, public works, planning, and city debt service. If you live in unincorporated Williamson County (no city), you don't pay this layer — but you also don't have city police or city services, which means relying on Williamson County Sheriff and county-level services. Most Franklin proper addresses pay both layers.
Other municipalities in Williamson County (Brentwood, Spring Hill, Nolensville, Thompson's Station, Fairview) have their own city rates that stack on top of the county rate.
The reassessment cycle
Tennessee reassesses residential property on a rotating four-year cycle. Williamson County's most recent reassessment took effect on January 1, 2025, with the next scheduled for 2029.
In a reassessment year, the appraised value of your home is updated to reflect current market conditions. However: Tennessee state law requires that reassessments be revenue-neutral at the county level. If property values rise across the county, the tax rate is adjusted downward (the "certified rate") so that the county collects roughly the same total revenue. The county or city governing body must take separate action to raise the rate above the certified rate.
The practical implication: in normal markets, your tax bill doesn't move much from year to year, even when home values rise. Spikes generally happen when local governments approve rate increases (often for school capital projects or major infrastructure), not from automatic reassessment.
This is meaningfully different from places like Texas or Florida, where rising home values can produce significant year-over-year tax bill increases without explicit rate action.
When property taxes are due
Williamson County and the City of Franklin both bill property taxes once per year:
- Bills issued: typically October
- Due date: February 28 of the following year (after which interest begins accruing)
- Discount for early payment: none in Tennessee
- Penalty for late payment: interest accrues at 1.5% per month after February 28
Most homeowners pay through their mortgage escrow, in which case the lender handles the payment automatically and you'll see it in your monthly mortgage payment.
If you don't escrow (paid-off home, certain mortgage products), you'll receive the bill directly and need to pay before February 28.
How Williamson County compares to your current state
Quick reality check for relocators using equivalent-home-value comparisons:
vs. New Jersey: Effective rate ~2.2% (Bergen, Essex, Morris counties). On a $900k home, NJ averages ~$19,800/year vs. Williamson's ~$4,700. Annual savings: ~$15,000.
vs. Illinois (Chicago suburbs): Effective rate ~2.0–2.5%. $900k home: ~$18,000–22,500/year vs. Williamson's $4,700. Annual savings: $13,000–17,000.
vs. Texas (Travis, Williamson, Collin counties): Effective rate ~1.7–2.1%. $900k home: ~$15,300–18,900/year vs. Williamson's $4,700. Annual savings: $10,000–14,000. (Texas has no income tax, so the comparison hinges on property tax differences.)
vs. Massachusetts: Effective rate ~1.0–1.4%. $900k home: ~$9,000–12,600/year vs. Williamson's $4,700. Annual savings: $4,000–8,000.
vs. California: Effective rate capped at ~1.0% by Prop 13, but with various local supplements. $900k home: ~$9,500–11,000/year vs. Williamson's $4,700. Annual savings: $4,500–6,000. (California also has the highest state income tax, so total tax savings are dramatically larger.)
vs. Florida: Effective rates vary widely, but typically 0.85–1.1%. $900k home: ~$7,650–9,900/year vs. Williamson's $4,700. Annual savings: $3,000–5,000. (Florida has no state income tax, similar to Tennessee.)
vs. Georgia: Effective rates 0.85–1.1% in metro Atlanta. $900k home: ~$7,650–9,900/year vs. Williamson's $4,700. Annual savings: $3,000–5,000. (Georgia has a state income tax, so total savings are larger.)
In every case, Williamson County's effective property tax rate is meaningfully below the comparable suburban market.
Property tax exemptions
Tennessee offers a few exemptions worth knowing about:
Tennessee Property Tax Relief Program — for homeowners who are 65+, totally and permanently disabled, or disabled veterans, with income below a state-set threshold. The program reimburses a portion of property taxes paid. Application required annually through the Williamson County Trustee.
Tax Freeze Program — for homeowners 65+ with income below a county-set threshold (Williamson's threshold is one of the highest in the state). Once frozen, the taxable value of your home is locked at its current level for as long as you remain eligible — reassessments don't increase your taxable value.
Homestead exemption (federal): Tennessee offers a modest homestead exemption that protects a small amount of home equity from creditors. Not an income tax exemption.
For retirees in particular, the Tax Freeze Program is one of the strongest financial tools in the state. Verify current income thresholds with the Williamson County Trustee.
How to estimate your tax bill before you buy
When evaluating a Franklin home, do this calculation:
- Take the listing price (or your best estimate of appraised value if it's been recently re-assessed)
- Multiply by 25% to get assessed value
- Divide by 100
- Multiply by the combined tax rate for the address (Franklin city + Williamson County is approximately $2.10/$100 in 2026; verify current year)
For unincorporated addresses, use just the county rate (~$1.78/$100). For Brentwood, Nolensville, Spring Hill, etc., add the relevant city rate.
This gives you a workable annual estimate. The actual bill may differ slightly based on the most recent assessment of the specific property, any improvements documented since the last reassessment, and any minor mid-year rate adjustments.
What to verify during due diligence
Before closing on a Franklin home:
- Current year's tax bill (provided by seller or available from county trustee)
- Any pending assessments (unusual but worth asking)
- Any tax abatements or special districts (e.g., a small number of properties may be in special service districts with additional fees)
- HOA dues are not property taxes but are an additional annual cost — confirm separately
- For new construction: the first year's tax bill is often based on an unimproved-land assessment and rises significantly in year two when the completed home is reassessed. Budget accordingly.
The bottom line
Williamson County's property taxes are one of the quiet financial wins of moving to Franklin. The combination of the 25% residential assessment ratio, the moderate nominal rate, and Tennessee's revenue-neutral reassessment law produces an effective rate that's well below national averages and dramatically below most high-tax markets. Combined with no state income tax, the math typically saves a Franklin household earning $200k+ somewhere between $10k and $25k per year compared with the higher-tax markets they're moving from.
That savings, year after year, is roughly equivalent to a paid-off second mortgage on the same home.
Questions about Franklin's tax structure?
I live in Franklin, work as a referral agent, and have walked through the tax math with dozens of relocators. If you want a free 30-minute call to look at your specific situation — current state taxes, projected Tennessee bill, and whether the financial case justifies the move — book a time below.
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