Wisconsin gas tax
State fuel excise · tax year 2026 · federal tax excluded
On a 20-gallon fill
$6.18
Over 500 gallons
$155
Per gallon
30.9¢
state only
Rate rank
18
1 is the highest
What Wisconsin charges at the pump
- Think of it as a charge per tank rather than a rate. In Wisconsin that charge is $6.18 every twenty gallons, and $155 across a year of five hundred. The state ranks 18 in the country. Nobody ever quotes it this way, which is why almost nobody knows what they pay.
- Diesel is not punished in Wisconsin. A twenty-gallon diesel fill carries $6.18 of state tax against $6.18 on ordinary fuel — the same or less. Most states go the other way and charge diesel more, so this is worth knowing if you drive one.
- Wisconsin adds a little more beyond the main fuel tax. Inspection and environmental charges come to $0.40 on a twenty-gallon fill. It is not large, and it is not optional either.
- Expressed per transaction rather than per gallon, Wisconsin's fuel excise is $6.18 on a twenty-gallon fill and $155 annually at five hundred gallons, ranking 18 nationally. ⚠️ Federal excise is excluded. Per-gallon quotation is conventional but obscures incidence: the same rate costs an efficient vehicle materially less per mile, so the tax is regressive with respect to vehicle age in a way the headline figure never shows.
- Wisconsin taxes diesel at or below its gasoline rate: $6.18 per twenty gallons against $6.18. ⚠️ This is the minority arrangement nationally — most states levy a premium on diesel to recover the heavier road wear associated with the vehicles that burn it — so Wisconsin's structure is a genuine cost difference for freight rather than a rounding artifact.
- Beyond the principal excise, Wisconsin levies separately-reported charges on motor fuel worth $0.40 per twenty gallons. ⚠️ Because states differ in whether such charges are consolidated into the headline rate or reported apart, cross-state rate tables — including the rank on this page — are not strictly comparable at the margin.
Your year of fuel tax
A $75,000 salary
| State fuel taxper gallon | 30.9¢ |
|---|---|
| Fuel tax, year | $193 |
| You must earn | $299 |
| Hours of work | 8.3 hr |
State excise only. Federal fuel tax and any local levy are not included.
Tax in a tank
A $75,000 salary
| State rate | 30.9¢ a gallon |
|---|---|
| Tank costs | $44.80 |
| Fifty tanks a year | $216.50 |
State excise only. The federal fuel tax and any local levy are on top of this.
Gasoline, diesel, and the charges reported separately
Per-gallon rates are shown as Wisconsin publishes them, to a tenth of a cent. The money columns are what those rates come to on a 20-gallon fill and across 500 gallons. Federal tax is charged on top of all of it and is not included.
| Fuel | Per gallon | On a fill | Over a year |
|---|---|---|---|
| Gasoline | 30.9¢ | $6.18 | $155 |
| Diesel | 30.9¢ | $6.18 | $155 |
| Other state charges | 2.0¢ | $0.40 | — |
What this page cannot tell you
- ⚠️ Federal fuel tax is charged on top of all this and is not included above. It is the same everywhere in the country.
- The tank and the year here are round reference amounts, not a guess at your driving. Your own total scales directly with the gallons you actually buy in Wisconsin.
- And some places add local fuel taxes of their own on top of the state's. Those are not counted here.
- ⚠️ Federal motor fuel excise applies in addition to every figure on this page and is deliberately excluded, being uniform nationally. Including it would raise each state's figure by the same amount and compress the differences this page exists to show.
- Quantities are reference points rather than estimates of consumption: liability is strictly proportional to gallons purchased, so any household's figure is this one scaled by its own volume. ⚠️ Fuel purchased outside Wisconsin is taxed by the state where it is bought, which is why the figures describe purchases rather than mileage.
- Local option fuel taxes exist in a number of states and are excluded from these figures, which cover the state levy only. Where a county or city in Wisconsin imposes its own charge, the true per-gallon burden at that address exceeds what this page reports.
Questions people ask
Why is there no tax line on my fuel receipt?
It is already in the price on the sign. The levy is charged per gallon further up the chain, so there is nothing to add at the pump and nothing to itemize.
How does this compare with other states?
18 of 51 puts it mid-table, where most states sit and where border effects are weakest.
Is diesel taxed the same as gasoline?
No — it carries its own rate, a lower one here. States set the two separately, usually reasoning about road wear from heavy vehicles rather than about the fuel itself, so the gap between them is a policy choice rather than a chemical one.
Why does motor fuel excise not appear as a separate charge?
Motor fuel excise is levied per gallon at the distributor or terminal, not at retail, so it is embedded in the pump price and not separately stated. Because it is volumetric rather than ad valorem, liability per gallon is invariant to the retail price and its real value erodes with inflation absent legislative change.
Where does this state sit in the national distribution?
This state ranks 18 of 51, within the middle third. Cross-border substitution effects are weakest at this position because adjacent-state differentials are typically small relative to travel cost.
How does the diesel rate relate to the gasoline rate here?
Diesel is taxed at a rate set independently of gasoline and is lower in this state. The differential is generally justified by road-wear attribution to heavy vehicles rather than by fuel characteristics, and several states index the two grades differently.