Indiana vs Michigan gas prices
Regular gas is $0.74 a gallon cheaper in Indiana — $11.16 on a 15-gallon fill-up. The two share a border, so that gap is worth knowing before you cross it.
Indiana
Michigan| Grade | IN | MI | Diff. | |
|---|---|---|---|---|
| Regular | $3.62 | $4.36 | $0.74IN | Indiana |
| Midgrade | $4.19 | $4.98 | $0.79IN | Indiana |
| Premium | $4.72 | $5.57 | $0.85IN | Indiana |
| Diesel | $5.36 | $5.42 | $0.06IN | Indiana |
Where the $0.74 gap actually comes from
None of it is tax. This is the case people assume never happens: Michigan is dearer at the pump while taxing a gallon $0.03 less than Indiana. The whole gap is the cost of the fuel itself — refinery proximity, pipeline access and state blend rules — and the tax difference is quietly shrinking it.
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 $0.74 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 Indiana or Michigan?
Regular gas is cheaper in Indiana, at $3.62 a gallon against $4.36 in Michigan — a gap of $0.74, or 20.6%. On a 15-gallon fill-up that is $11.16. Figures are AAA daily state averages for 2026-08-02.
Why is gas more expensive in Michigan?
Not because of tax — Michigan actually levies $0.03 a gallon less than Indiana. The whole $0.74 gap, and more, is the cost of the fuel itself: refinery proximity, pipeline access and state fuel-blend rules. Tax policy is narrowing this gap rather than causing it.
Is diesel cheaper in Indiana or Michigan?
Diesel is cheaper in Indiana at $5.36 a gallon, against $5.42 in Michigan — $0.06 a gallon apart.
Is it worth crossing from Michigan into Indiana to fill up?
If you are already near the line, yes: a 15-gallon fill saves about $11.16. Driving out of your way for it rarely pays — at $4.36 a gallon and 25 mpg, a 32-mile round trip would eat the whole saving in fuel alone, before your time.