Illinois Gas Tax
Illinois’s state taxes and fees on gasoline total 71.7¢ a gallon, the 2nd-highest of 51; with the 18.4¢ federal tax, drivers pay 90.1¢ a gallon in combined tax. Rates are from U.S. Energy Information Administration data as of July 2026.
In effect now: Illinois suspended its July 1, 2026 inflation adjustment: the motor fuel tax stays at 48.3¢ a gallon through December 31, 2026, below the 49.6¢ in the EIA table.
What makes up Illinois’s 90.1¢
| Illinois state excise tax | 49.6¢ |
|---|---|
| Other Illinois taxes & fees sales/use taxes, inspection and environmental fees | 22.1¢ |
| Total Illinois state tax | 71.7¢ |
| Federal excise + LUST fee 18.3¢ excise + 0.1¢ LUST, unchanged since 1993 | 18.4¢ |
| Combined state + federal | 90.1¢ |
Prepaid Sales Tax Rates: $0.2100/gal for gasoline containing less than 15% denatured ethanol and diesel containing less than 10% biodiesel or renewable diesel, $0.1900/gal for E15 gasohol, and $0.1700/gal for mid-range ethanol blends. Underground Storage Tank tax: $0.0030/gal. Environmental Impact Fee: $0.0080/gal.
Illinois's tax: doubled in 2019, indexed each July
Illinois taxes gasoline with a per-gallon motor fuel tax and with the state sales tax. The sales tax, 6.25 percent, is prepaid by distributors at a per-gallon rate set from average prices, and it makes up most of the EIA’s “other taxes” figure along with small underground storage tank and environmental fees. Chicago, Cook County, several collar counties, and other municipalities add their own fuel taxes, which the EIA figure excludes.
The Rebuild Illinois law of 2019 doubled the motor fuel tax from 19¢ to 38¢ a gallon on July 1, 2019 and tied it to the Consumer Price Index, adjusted every July 1. The adjustment scheduled for July 1, 2026 would have raised the rate from 48.3¢ to 49.6¢, the figure in the EIA table, but Public Act 104-0468, signed June 16, 2026, suspended it for six months. The rate stays at 48.3¢ through December 31, 2026, after which the adjustment is set to resume.
On the EIA’s basis, Illinois’s total state tax of 71.7¢ a gallon is the 2nd-highest of the 50 states and D.C., against a 51-jurisdiction average of 33.8¢.
How the tax fits with fuel supply and price history is covered on the Illinois gas prices page.
Sources: current rates and rankings are from the EIA motor fuel tax table in our database; other facts are from the sources listed here.
- U.S. EIA, Federal and State Motor Fuels Taxes (Petroleum Marketing Monthly)
- Illinois Department of Revenue, FY 2026-29: revised motor fuel tax rate effective July 1, 2026 through December 31, 2026
- Illinois Department of Revenue, Motor Fuel Tax Rates and Fees
- Illinois Department of Revenue, Prepaid Sales Tax Rates
Illinois Gas Tax Among Bordering States
In the EIA table, 0 of 5 bordering states have a higher state total than Illinois. Indiana, the bordering state with the highest total, is listed at 64.5¢ (EIA table, July 2026), which puts Illinois 7.2¢ above Indiana. Wisconsin is listed at 32.9¢ (EIA table, July 2026), and Illinois is 38.8¢ above Wisconsin. Iowa and Missouri are both listed at 30.0¢ (EIA table, July 2026), and Illinois is 41.7¢ above Iowa and 41.7¢ above Missouri. Kentucky, the bordering state with the lowest total, is listed at 26.4¢ (EIA table, July 2026), and Illinois is 45.3¢ above Kentucky.
Across the 50 states and D.C. in the EIA's July 2026 table, 1 jurisdiction has a higher state total than Illinois and 49 have a lower one. California is the highest at 73.6¢ (EIA table, July 2026), and Alaska is the lowest at 9.0¢. Illinois's total is 37.9¢ above the average state total in the July 2026 EIA table.
Of the Illinois state total in the July 2026 EIA table, 69% is excise, and the other state taxes and fees come to 22.1¢ a gallon. With the 18.4¢ (EIA table, July 2026) federal tax counted alongside, the state's share of the combined figure is 80%. Local option taxes on gasoline apply in parts of Illinois, and none of them is counted in the 71.7¢ in the July 2026 EIA table.
How much of a gallon in Illinois is tax
Illinois gasoline is estimated at $4.13 a gallon. Against that, the 90.1¢ of combined state and federal tax is about 21.8% of what a driver pays — with local taxes, where they apply, on top. While the change described above is in effect, the tax actually collected is lower than this.
Tax rate from EIA as of July 2026; pump price is this week’s US Gas Gauge estimate from EIA regional prices (EIA publishes no weekly average for Illinois).
Illinois vs. the other 50 states
Illinois’s state gas tax of 71.7¢ is 37.9¢ above the 33.8¢ average across 50 states and D.C. — it is the 2nd-highest.
Neighboring states' gas tax
| State | State tax | vs. Illinois |
|---|---|---|
| Indiana gas tax | 64.5¢ | −7.2¢ |
| Wisconsin gas tax | 32.9¢ | −38.8¢ |
| Iowa gas tax | 30.0¢ | −41.7¢ |
| Missouri gas tax | 30.0¢ | −41.7¢ |
| Kentucky gas tax | 26.4¢ | −45.3¢ |
Illinois gas tax, answered
- What is the gas tax in Illinois?
- 71.7¢ a gallon in state taxes and fees; with the 18.4¢ federal tax, 90.1¢ (EIA, July 2026). In effect now: Illinois suspended its July 1, 2026 inflation adjustment: the motor fuel tax stays at 48.3¢ a gallon through December 31, 2026, below the 49.6¢ in the EIA table.
- How does Illinois's gas tax compare to other states?
- The 2nd-highest of the 50 states and D.C.; the average is 33.8¢.
- What is the federal gas tax in Illinois?
- The federal gasoline tax is 18.4¢ per gallon in Illinois, the same as in every other state.
- Does Illinois charge local gas taxes too?
- Yes: EIA flags Illinois as allowing local option taxes, which are not in the figures here.
Related to Illinois gas tax
EIA, “Federal and state motor fuels taxes” (July 2026 (revised August 2026)); how these figures are built.
More Illinois data
Use this data
Download: Gas tax by state, federal + state rates (CSV).
Column definitions, coverage and every file: gas price data. Free to reuse under CC BY 4.0 with credit.
Cite as: US Gas Gauge, “Illinois Gas Tax,” usgasgauge.com/gas-tax/illinois. Source data: U.S. Energy Information Administration.