State gas taxes · EIA figures for July 2026
Illinois gas tax
The 2nd highest state gas tax of 51, and 37.9¢ above the state average. With the 18.4¢ federal tax, Illinois drivers pay 90.10¢ a gallon in fuel tax, about 20% of this week's price.
What makes up the tax on a gallon
| State excise tax | 49.60¢ |
|---|---|
| Other state taxes and fees | 22.10¢ |
| Federal excise tax | 18.40¢ |
| Total per gallon | 90.10¢ |
| On a 15-gallon fill | $13.52 |
| Over a typical year (480 gallons) | $432 |
| Regular gas this week | $4.460 |
From the EIA’s notes for Illinois: Prepaid Sales Tax Rates: $0.
Source: EIA federal and state motor fuel taxes, July 2026. The federal rate has not changed since 1993. County and city taxes are not included, so some drivers pay a little more.
Fuel tax in Illinois and its neighbours
Across the line in Kentucky, state tax is 45.3¢ a gallon lower, which is $6.80 less tax on a 15-gallon fill.
| State | State tax | Versus IL | On a 15-gal tank |
|---|---|---|---|
| Kentucky | 26.4¢ | −45.3¢ | −$6.80 |
| Missouri | 30.0¢ | −41.7¢ | −$6.26 |
| Iowa | 30.0¢ | −41.7¢ | −$6.25 |
| Wisconsin | 32.9¢ | −38.8¢ | −$5.82 |
| Indiana | 64.5¢ | −7.2¢ | −$1.08 |
| Illinois | 71.7¢ | — | — |
Where Illinois sits in the ranking
| 1. California | 73.64¢ |
|---|---|
| 2. Illinois | 71.70¢ |
| 3. Indiana | 64.50¢ |
| 4. Washington | 60.17¢ |
Ranked by total state tax per gallon, highest first. See all 51 ranked.
What this means for your driving
Tax is a fixed number of cents on every gallon, so the less fuel you burn, the less of it you pay. A car that gets 30 mpg pays $360 a year in fuel tax over 12,000 miles in Illinois; a pickup at 19 mpg pays $569.
Work out a trip or a year of driving with the Illinois fuel cost calculator, or see Illinois gas prices this week.
Illinois gas tax questions
- What is the gas tax in Illinois?
- Illinois charges 71.70¢ per gallon of gasoline in state tax: 49.60¢ of excise tax plus 22.10¢ in other per-gallon taxes and fees, according to the EIA's table updated July 2026. Add the 18.4¢ federal tax and drivers pay 90.10¢ a gallon in fuel tax.
- How does Illinois's gas tax compare with other states?
- It is the 2nd highest of 51 (the 50 states and D.C.), and 37.9¢ a gallon above the average state tax of 33.8¢.
- How much gas tax does a Illinois driver pay in a year?
- About $432 in state and federal fuel tax for a typical year of 480 gallons (roughly 12,000 miles at 25 mpg), of which $344 goes to the state. A 15-gallon fill carries $13.52 of tax.
- Is gas tax included in the price at the pump?
- Yes. Federal and state per-gallon fuel taxes are built into the price posted on the sign; they are not added at the register. That is why tax differences between neighbouring states show up directly in pump prices.
- Which neighbouring state has a lower gas tax than Illinois?
- Kentucky has the lowest state gas tax of Illinois's neighbours, at 26.40¢ a gallon. That is 45.3¢ less, or $6.80 on a 15-gallon fill.