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Illinois

Illinois Car Buying Calculators

Estimate supported Illinois dealer vehicle tax, private-party vehicle use tax, ordinary passenger registration, title, and plate-transfer costs using current IDOR and Secretary of State rules.

Rules verified October 2026Official Illinois sources
Six tools available

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Calculate dealer or private-party tax, registration and title costs, a supported out-the-door total, or review the fees on a dealer quote.

Illinois Car Sales Tax Calculator

Use vehicle-specific dealer Auto Rates or the separate 2026 RUT-50 private-party tables.

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Illinois Vehicle Registration Fee Calculator

Estimate $151 passenger registration and the $100 battery-electric additional fee when applicable.

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Illinois Tax, Title & License Calculator

Combine supported tax, the $165 original title, and one registration or plate-transfer path.

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Illinois Out-the-Door Price Calculator

Estimate the supported purchase total before trade equity and cash down, then see the amount remaining separately.

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Illinois Title Transfer Fee Calculator

Estimate RUT-50 tax, title, and an optional registration or eligible plate-transfer path for an ordinary private sale.

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Illinois Dealer Fee Checker

Separate government charges, dealer-controlled fees, optional products, and charges needing review.

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Illinois-specific paths

Dealer Auto Rates and private-party RUT-50 tables

A registered Illinois dealer sale uses the vehicle-specific Auto Rate for the dealer's standard business location, with supported purchaser-location adjustments where IDOR requires them. An ordinary private-party purchase uses the separate 2026 RUT-50 fixed tables rather than a percentage of price.

Off-site dealer sales, nonresident reciprocity, leases, gifts, family exceptions, motorcycles, ATVs, specialty plates, and unsupported registration adjustments remain outside this phase.

Primary sources

Where the Illinois rules come from

815 ILCS 375/11.1 — Documentary FeeIllinois General AssemblySupports: $300 base beginning January 1, 2020, annual CPI adjustment, not an official fee, not required by lawSignificant Dealer Issues — 2026 Documentary FeeIllinois Automobile Dealers Association (industry source)Supports: industry-published $377.63 2026 CPI-adjusted figure, exact amount is not presented as a state-published figure92 Ill. Adm. Code 1010.540 — Electronic Registration and Titling FeesIllinois Secretary of State / Joint Committee on Administrative RulesSupports: optional ERT service, $35 maximum customer fee, Optional ERT Fee labeling14 Ill. Adm. Code 475.310 — Advertised PriceIllinois Attorney General / Joint Committee on Administrative RulesSupports: advertised-price inclusions, clearly disclosed tax, title, license, and documentary-fee exclusionsSales Tax Rate Machine Readable Files — Effective August 1, 2026Illinois Department of RevenueSupports: official Auto Sales High and Low rates, location IDs, rate override flags, August 1, 2026 effective dataMachine Readable County/Municipality File GuideIllinois Department of RevenueSupports: Auto Rate field definitions, Chicago high-rate rule, Metro-East override behaviorST-556 Sales Tax Transaction Return InstructionsIllinois Department of RevenueSupports: standard business location sourcing, taxable selling price, qualified trade-in, Chicago Home Rule Use Tax, district use-tax adjustments, Metro-East vehicle feeST-9 — A Guide for Reporting Sales Using Form ST-556Illinois Department of RevenueSupports: taxable accessories and dealer charges, reimbursed rebates, non-reimbursed retailer discounts, trade value versus payoffFY 2026-34 — NITA Rate Change Effective August 1, 2026Illinois Department of RevenueSupports: 1.25% Cook County NITA rate, 1% DuPage, Kane, Lake, McHenry, and Will rate, titled and registered itemsRUT-5 — Private Party Vehicle Use Tax Chart for 2026Illinois Department of RevenueSupports: 2026 under-$15,000 age table, $15,000-and-over value brackets, no private-party trade-in deductionRUT-6 — Form RUT-50 Reference GuideIllinois Department of RevenueSupports: Chicago private-party vehicle use tax, Cook County private-party vehicle use tax, title or registration address sourcingRUT-50 Private Party Vehicle Use Tax InstructionsIllinois Department of RevenueSupports: purchase price or fair market value, vehicle age, no trade-in allowance, registration-address rulePassenger License PlatesIllinois Secretary of StateSupports: $151 passenger registration, $165 original title, $100 battery-electric fee, standard first-time plate treatmentVehicle Services FeesIllinois Secretary of StateSupports: $151 passenger registration, $165 original titleTransferring PlatesIllinois Secretary of StateSupports: $25 eligible plate transfer, $190 title-and-transfer total