Michigan vs Wisconsin gas prices
Regular gas is $0.40 a gallon cheaper in Wisconsin — $5.96 on a 15-gallon fill-up. The two share a border, so that gap is worth knowing before you cross it.
Michigan
Wisconsin| Grade | MI | WI | Diff. | |
|---|---|---|---|---|
| Regular | $4.36 | $3.97 | $0.40WI | Wisconsin |
| Midgrade | $4.98 | $4.54 | $0.45WI | Wisconsin |
| Premium | $5.57 | $5.13 | $0.43WI | Wisconsin |
| Diesel | $5.42 | $5.05 | $0.36WI | Wisconsin |
Where the $0.40 gap actually comes from
50% of it is tax. Michigan charges $0.20 more per gallon in federal and state taxes than Wisconsin. The remaining $0.20 is a real difference in what the fuel, refining and distribution cost — refinery proximity, pipeline access and state fuel-blend rules.
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 $0.40 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 Michigan or Wisconsin?
Regular gas is cheaper in Wisconsin, at $3.97 a gallon against $4.36 in Michigan — a gap of $0.40, or 10.0%. On a 15-gallon fill-up that is $5.96. Figures are AAA daily state averages for 2026-08-02.
Why is gas more expensive in Michigan?
50% of the $0.40 gap is tax rather than the cost of the fuel. Michigan levies $0.20 more per gallon in federal and state taxes; the remaining $0.20 is a genuine difference in what the fuel, refining and distribution cost.
Is diesel cheaper in Michigan or Wisconsin?
Diesel is cheaper in Wisconsin at $5.05 a gallon, against $5.42 in Michigan — $0.36 a gallon apart.
Is it worth crossing from Michigan into Wisconsin to fill up?
If you are already near the line, yes: a 15-gallon fill saves about $5.96. Driving out of your way for it rarely pays — at $4.36 a gallon and 25 mpg, a 17-mile round trip would eat the whole saving in fuel alone, before your time.