North Carolina vs Tennessee gas prices
Regular gas is $0.12 a gallon cheaper in Tennessee — $1.76 on a 15-gallon fill-up. The two share a border, so that gap is worth knowing before you cross it.
North Carolina
Tennessee| Grade | NC | TN | Diff. | |
|---|---|---|---|---|
| Regular | $3.80 | $3.68 | $0.12TN | Tennessee |
| Midgrade | $4.26 | $4.13 | $0.13TN | Tennessee |
| Premium | $4.66 | $4.53 | $0.12TN | Tennessee |
| Diesel | $5.33 | $5.05 | $0.28TN | Tennessee |
Where the $0.12 gap actually comes from
All of it is tax, and then some. The fuel itself is dearer in Tennessee before tax — by $0.02 a gallon — yet it is still $0.12 cheaper at the pump, because North Carolina levies $0.14 more per gallon. Policy is doing all of the work here and overcoming a product disadvantage on the way.
Fuel, refining, distribution and marginFederal and state taxes Pre-tax figures are estimates — see the note below.
What the gap is worth
Based on today’s $0.12 per-gallon difference, which moves week to week. Use the fuel cost calculator for your own mileage and vehicle.
Prices by metro area
State averages hide a lot. These are the cheapest metros AAA reports on each side.
Other comparisons
Frequently asked questions
Is gas cheaper in North Carolina or Tennessee?
Regular gas is cheaper in Tennessee, at $3.68 a gallon against $3.80 in North Carolina — a gap of $0.12, or 3.2%. On a 15-gallon fill-up that is $1.76. Figures are AAA daily state averages for 2026-08-02.
Why is gas more expensive in North Carolina?
Entirely because of tax. Tennessee actually pays more for the fuel itself — $0.02 a gallon more before tax — but North Carolina levies $0.14 more per gallon, which more than reverses the advantage.
Is diesel cheaper in North Carolina or Tennessee?
Diesel is cheaper in Tennessee at $5.05 a gallon, against $5.33 in North Carolina — $0.28 a gallon apart.
Is it worth crossing from North Carolina into Tennessee to fill up?
If you are already near the line, yes: a 15-gallon fill saves about $1.76. Driving out of your way for it rarely pays — at $3.80 a gallon and 25 mpg, a 6-mile round trip would eat the whole saving in fuel alone, before your time.