Taxes explained
Illinois fuel taxes
Fixed duties and percentage taxes work differently. These records preserve effective dates and unresolved checks.
| Tax / fuel | Rate | Effective from | Through | Status and source |
|---|---|---|---|---|
| Excise Fixed gasoline | USD 0.2380/L | 2026-07-01 | Open / check source | Verification pending TODO: reconcile sales-tax base and local levies before deriving. 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. Rate observed at the EIA reporting snapshot; verify legislative effective date. Federal tax included. |
| Excise Fixed diesel | USD 0.2737/L | 2026-07-01 | Open / check source | Verification pending TODO: reconcile sales-tax base and local levies before deriving. 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. Rate observed at the EIA reporting snapshot; verify legislative effective date. Federal tax included. |
| Excise Fixed gasoline | USD 0.2240/L | 2026-01-01 | Open / check source | Verification pending TODO: reconcile sales-tax base and local levies before deriving. Prepaid Sales Tax Rates: $0.1700/gal for gasoline containing less than 15% denatured ethanol and diesel containing less than 10% biodiesel or renewable diesel, $0.1500/gal for E15 gasohol, and $0.1300/gal for mid-range ethanol blends. Underground Storage Tank tax: $0.0030/gal. Environmental Impact Fee: $0.0080/gal. Rate observed at the EIA reporting snapshot; verify legislative effective date. Federal tax included. |
| Excise Fixed diesel | USD 0.2597/L | 2026-01-01 | Open / check source | Verification pending TODO: reconcile sales-tax base and local levies before deriving. Prepaid Sales Tax Rates: $0.1700/gal for gasoline containing less than 15% denatured ethanol and diesel containing less than 10% biodiesel or renewable diesel, $0.1500/gal for E15 gasohol, and $0.1300/gal for mid-range ethanol blends. Underground Storage Tank tax: $0.0030/gal. Environmental Impact Fee: $0.0080/gal. Rate observed at the EIA reporting snapshot; verify legislative effective date. Federal tax included. |
| Excise Fixed gasoline | USD 0.2240/L | 2025-07-01 | Open / check source | Verification pending TODO: reconcile sales-tax base and local levies before deriving. Prepaid Sales Tax Rates: $0.1700/gal for gasoline containing less than 15% denatured ethanol and diesel containing less than 10% biodiesel or renewable diesel, $0.1500/gal for E15 gasohol, and $0.1300/gal for mid-range ethanol blends. Underground Storage Tank tax: $0.0030/gal. Environmental Impact Fee: $0.0080/gal. Rate observed at the EIA reporting snapshot; verify legislative effective date. Federal tax included. |
| Excise Fixed diesel | USD 0.2597/L | 2025-07-01 | Open / check source | Verification pending TODO: reconcile sales-tax base and local levies before deriving. Prepaid Sales Tax Rates: $0.1700/gal for gasoline containing less than 15% denatured ethanol and diesel containing less than 10% biodiesel or renewable diesel, $0.1500/gal for E15 gasohol, and $0.1300/gal for mid-range ethanol blends. Underground Storage Tank tax: $0.0030/gal. Environmental Impact Fee: $0.0080/gal. Rate observed at the EIA reporting snapshot; verify legislative effective date. Federal tax included. |
Common questions
Does a percentage tax stay fixed in cents per litre?
No. VAT, GST and sales taxes vary with their taxable base. For a tax-inclusive price and one rate r, the tax amount is price × r / (1 + r).
Why are some tax records marked unverified?
A published summary can omit a local levy, a tax-base rule or an effective date. Unverified records are not treated as a complete statutory tax stack.