Illinois car loan calculator
Estimate your monthly payment with Illinois sales tax, typical dealer documentation, title and registration fees, and this state's trade-in tax treatment.
Illinois tax & fee snapshot
| Average sales tax (estimate) | 6.250% |
|---|---|
| Doc / processing fee (est.) | $358.00 |
| Title fee (est.) | $150.00 |
| Registration fee (est.) | $150.00 |
| Trade-in tax treatment | Limited trade-in tax credit |
| Trade-in credit limit (est.) | $10,000 |
These figures are planning estimates stored for the calculator. County, city, vehicle type, and dealer practices can change the final numbers on your contract.
Trade-in tax in Illinois
Limited trade-in tax credit
Trade-in may reduce the taxable amount only up to about $10,000 in this estimate. Confirm current statutory limits.
How to use this page
- Open the calculator with Illinois pre-selected.
- Enter vehicle price, down payment, and any trade-in value / payoff.
- Set APR and term (60 or 72 months are common).
- Review amount financed, monthly payment, and amortization schedule.
- Download the PDF schedule if you want a worksheet for the dealer or lender.
Illinois doc fee — what dealers can charge
≈$378 cap
CPI-indexed from a $150 base — one of the stronger caps with reasonable enforcement.
The doc fee is not usually negotiable as a standalone line item — negotiate your out-the-door total instead. Our 2026 state tax & fee table compares all 50 states.
Worked example: a $30,000 car in Illinois
| Vehicle price | $30,000 |
|---|---|
| Down payment | $5,000 |
| Trade-in value / payoff | $6,000 / $1,000 |
| Trade-in rule | limited trade-in credit (max $10,000) — $5,000 reduces the taxable amount |
| Taxable amount | $25,000 |
| Sales tax 6.250% | $1,563 |
| Doc fee | ≈$378 cap |
| Price + tax + doc fee | $31,940 |
Your actual numbers depend on the vehicle, county taxes, and dealer. Use the Illinois calculator to run your own deal.
Auto lenders serving Illinois
Start with a pre-approval from at least two lenders — a credit union plus an online lender — before visiting a dealership. Current offers change; verify each lender's latest rate and availability.
| Lender | Type | Why consider |
|---|---|---|
| PenFed Credit Union | National credit union | Low used-car rates. |
| Alliant Credit Union | Credit union | Large online CU with low auto rates. |
| Consumers Cooperative Credit Union | Credit union | Northern Illinois. |
State-level data not yet available — see national averages on our /data/state-apr page.
Why state matters for your payment
Two buyers with the same vehicle price and APR can see different amounts financed solely because of sales tax and fees. Rolling tax and fees into the loan increases the principal and total interest; paying them at signing raises cash due but can lower the financed balance.
Use the Illinois calculator to stress-test down payment, term length, and APR before you negotiate.
Related guide: Illinois Car Loan Calculator: Estimate Your Car Payment
Local tax & market data: Illinois sales tax & fees · Average APR by state · Rates by credit score · All state guides