Michigan’s gas tax in 2026 is 52.4 cents per gallon, effective January 1.1Michigan Department of Treasury. Fuel Tax Changes That rate replaces the 31-cent excise drivers paid through most of 2025, and it applies the same way to gasoline, diesel, and alternative fuels like propane. On a 15-gallon fill-up, the state excise alone now adds about $7.86, compared to roughly $4.65 under the old rate.
What Actually Changed
Two things happened at once. House Bill 4183, enacted as Public Act 20 of 2025, raised the per-gallon excise tax and eliminated the 6% sales tax that previously applied to fuel purchases.2Michigan Legislature. MCL 207-1008 – Motor Fuel Tax Act Before 2026, Michigan stacked both taxes on every gallon. Now there is a single flat rate.
The statute set a 51-cent base effective October 1, 2025. The Department of Treasury then applied the annual inflation adjustment on January 1, 2026, producing the current 52.4-cent figure.1Michigan Department of Treasury. Fuel Tax Changes Every cent of the new excise flows to the Michigan Transportation Fund for road and bridge work. The constitutional revenue that previously went to schools and local governments from fuel sales tax now comes from other sources.
Are You Paying More or Less at the Pump?
It depends on gas prices. Under the old system, a $3.50 gallon carried about 31 cents of excise plus roughly 21 cents of sales tax, totaling around 52 cents in state taxes. The new 52.4-cent flat rate at that price is almost identical.
Push the pump price up to $4.50 and the picture shifts. The old combined state tax would have hit about 58 cents, while the new excise stays locked at 52.4 cents. Higher gas prices now save you money compared to the old structure. Lower gas prices cost you more, because the flat excise rate no longer floats down with the price of the fuel.
The Full Tax Built Into Each Gallon
Michigan’s 52.4 cents isn’t the only tax on the gallon. The federal government adds 18.4 cents on gasoline and 24.4 cents on diesel, rates Congress set in 1993 and has not changed since. A separate 0.1-cent federal charge funds the Leaking Underground Storage Tank Trust Fund.3US EPA. Leaking Underground Storage Tank Trust Fund
Add it up and a Michigan driver buying regular gasoline in 2026 pays roughly 71 cents per gallon in combined state and federal excise taxes before the retailer’s price enters the picture. On a $3.50 gallon, about 20% of what you hand over is tax. Suppliers pay the state tax when fuel leaves the terminal rack, and the cost passes through to the pump. Individual gas stations don’t collect it from you directly.
If You Drive an Electric or Plug-In Hybrid Vehicle
Skipping the pump doesn’t skip the road funding bill. Michigan charges annual registration surcharges on electric and plug-in hybrid vehicles, collected by the Secretary of State at plate renewal. The 2026 amounts are:4Michigan Secretary of State. License Plates and Tabs
- Battery-electric vehicles, 8,000 lbs or less: $267
- Battery-electric trucks and buses over 8,000 lbs: $367
- Plug-in hybrids, 8,000 lbs or less: $113
- Plug-in hybrid trucks and buses over 8,000 lbs: $183
These sit on top of standard registration costs. The surcharges rose with the gas tax because they’re tied to it by formula: $5.00 is added to the base EV fee for every penny the state fuel tax exceeds 19 cents, and $2.50 per penny for plug-in hybrids.5Alternative Fuels Data Center. Electric Vehicle (EV) Fee With the excise now at 52.4 cents, that escalator has pushed fees well above the statutory base amounts of $100 and $30. Future annual inflation adjustments to the gas tax will pull EV surcharges up alongside them.
One federal offset is gone. The New Clean Vehicle Credit under Section 30D is no longer available for vehicles acquired after September 30, 2025.6Internal Revenue Service. Clean Vehicle Tax Credits EV buyers in 2026 face the higher registration surcharge without the federal credit that previously helped soften the cost of the vehicle.
How Much the Rate Can Rise Next Year
The gas tax carries an annual inflation adjustment, but it’s capped. The Department of Treasury multiplies the prior year’s rate by one plus the lesser of 5% or actual inflation, then rounds up to the nearest tenth of a cent.2Michigan Legislature. MCL 207-1008 – Motor Fuel Tax Act At the current 52.4-cent rate, the maximum possible single-year increase works out to about 2.6 cents per gallon, and that’s only if inflation runs above 5%. In practice, you can expect the rate to tick up by one to three cents each January, depending on where inflation lands.
The 5% cap doesn’t apply to legislative changes. The October 2025 leap from 31 cents to 51 cents happened because the legislature wrote a new base rate into the statute, not because the inflation formula produced it. Another legislative overhaul could do the same thing again, but the automatic yearly adjustment cannot.
If You Drive for Work
The IRS standard mileage rate for 2026 is 72.5 cents per mile, up 2.5 cents from 2025.7Internal Revenue Service. IRS Sets 2026 Business Standard Mileage Rate at 72.5 Cents Per Mile, Up 2.5 Cents That rate rolls fuel, insurance, depreciation, and maintenance into a single figure and applies to gas, diesel, hybrid, and fully electric vehicles alike. Self-employed drivers and business owners can use it instead of tracking actual fuel expenses, which simplifies recordkeeping now that the pump math has changed.
Interstate commercial carriers have a separate obligation. Vehicles over 26,000 pounds or with three or more axles that travel in multiple states file quarterly International Fuel Tax Agreement returns reporting fuel purchased and miles driven in each jurisdiction. Michigan-based carriers reconcile what they owe or are owed based on the difference between fuel tax paid at the pump and the tax obligation generated by miles driven in each state. With Michigan’s rate now among the highest in the country, fueling up here builds credits that can be applied against lower-tax states on the quarterly return.