Move to Brentwood and it's tempting to assume car insurance will cost more, not less. The homes are bigger, the driveways hold newer vehicles, and the city's median household income of $194,511 runs nearly three times the Tennessee average of $71,997. Surely that shows up on a quote somewhere.
It doesn't, at least not the way people expect. Insurance companies don't underwrite your tax bracket. They underwrite claims history, and Brentwood's claims history is about as quiet as Tennessee gets.
The Myth: Wealthy Suburbs Pay More
It's a reasonable guess. Expensive cars cost more to repair and replace, so a city full of them should carry a higher average premium. That logic holds in some places.
It doesn't hold in Brentwood, and it doesn't hold in Franklin a few miles south either, where full coverage averages around $111 a month against a $2,004 statewide figure. Vehicle value is one input among many, and it's rarely the one that decides the outcome.
The Evidence: A Crime Index Under 52
Brentwood's 2024 crime index sits at 51.6. The national average is 228.4. Zero homicides were recorded that year, along with 39.8 assaults, 66.4 burglaries, and 632.6 thefts per 100,000 residents, according to city-data.com.
Those numbers matter more to an insurer than a paycheck does. Comprehensive coverage prices against theft and vandalism claims. Liability and bodily injury coverage price against accident severity and injury frequency. A city with this little violent crime and this little property crime simply doesn't generate many of either.
The Counterpoint: Concord Road Traffic
Brentwood isn't a sleepy cul-de-sac town, though. I-65 runs directly through it, and Exit 71 at Concord Road feeds a steady stream of commuters into the city's office corridor every weekday morning and evening.
UnitedHealth Group employs more than 3,000 people out of Brentwood, and Tractor Supply Company runs its corporate headquarters here too, alongside Brookdale Senior Living, Comdata, and GEODIS. That's a lot of vehicles converging on the same interchange at the same two times a day — the exact recipe for low-speed fender-benders.
It's real pressure on collision claims. It just hasn't outweighed what the low crime numbers are doing on the other side of the ledger.
The Comparison: Brentwood vs. Franklin
The two cities get lumped together constantly, and for good reason — both sit in Williamson County, both border I-65, and both post crime numbers well under the national average. A 2014 study ranked Brentwood the seventh-wealthiest small town in the country, and its income figure runs higher than Franklin's.
But the traffic geography differs. Franklin's pressure point is the Cool Springs corridor near I-65's Moores Lane exit. Brentwood's runs through Concord Road instead. Different intersections, same basic math: low crime pulling rates down, weekday office traffic pushing back a little.
What This Means for Your Policy
- Don't expect a discount for the ZIP code alone: insurers price claims history, not median income.
- Keep your UM/UIM coverage matched to your liability limits: Tennessee insurers must offer it, and only a written rejection waives it.
- Factor in the Concord Road commute: that interchange sees enough daily volume to matter for collision risk, even if it isn't moving the citywide average much.
- Shop more than one quote: with vehicle values running high here, comprehensive and collision limits are worth double-checking against replacement cost.
Want to know what's actually driving your number once you have a quote in hand? Our guide to lowering your car insurance premium covers the discounts most drivers overlook.