Illinois doc fee cap: $377.63 and what it covers

What Illinois allows

Illinois caps the documentary fee at $377.63. A dealer cannot charge more than that, and a figure above it is a billing error rather than a negotiating position.
The cap is inflation-indexed, so it moves on a schedule rather than staying fixed. The figure above is the one currently in force.
The rule: 815 ILCS 375/11.1.

Is it taxed, and is it negotiable?

The doc fee is part of the taxable amount in Illinois, so sales tax is calculated on it as well. A larger doc fee costs you more than the fee itself.
Because the cap is a legal ceiling rather than a required charge, a dealer is free to charge less. It is a smaller lever than the vehicle price, but it is not fixed by law at the maximum.
Taxed at Illinois's 6.25% to 8.5%, a $377.63 doc fee really costs between $401.23 and $409.73.

What's specific to Illinois

The doc fee is capped at $377.63 for 2026 (CPI-indexed from a $300 base, 815 ILCS 375/11.1) and is part of the taxable selling price.

Run your own numbers

Vehicle price

$

The negotiated (or advertised) selling price, before fees and tax.

Your ZIP code

Tax and registration follow where YOU register — not the dealership.

Condition

New Used CPO

Fuel

EV/PHEV surcharges apply in many states.

More options — trade-in, rebates, doc fee, add-ons

Trade-in value

$

Reduces your taxable amount only in states that allow it.

Trade-in loan payoff

$

Display-only in the equity math — doesn't affect tax.

Manufacturer rebate

$

Taxed in some states, a tax-free discount in others.

Dealer discount

$

Off-invoice discount from the dealer — different from a rebate for tax.

Dealer doc fee (if quoted)

$

Leave blank to use your state's cap or the typical amount.

Dealer add-ons total

$

Nitrogen, VIN etch, protection packages… labeled negotiable in the output.

F&I products total (VSC, GAP…)

$

Excluded from tax in some states when itemized separately.

Model year

MSRP / vehicle value

$

Needed in states with value-based registration (AZ VLT, NV GST).

Financing the purchase I have a plate to transfer (matters in Florida — skips the $225 initial registration)

Truck / commercial (California weight fees)

Vehicle type

Pickups always use the unladen-weight schedule (VC §9400) — never CVRA.

Curb (unladen) weight, lbs

On the door-jamb sticker. Blank = typical half-ton bracket ($80).

Axles

Declared GVW/CGW, lbs

As declared on the REG 4008. CVRA vehicles skip the TIF.

Used vehicle details (California)

Plate expiration (month)

Expired or expiring within 120 days of purchase → renewal fees ride along with the deal. Blank = assume they're due (safe estimate).

No current California plates (out-of-state car — full first registration + smog test due)

My price already includes…

Some dealers now fold fees into the advertised price (FTC pressure; California's total-price law). Check what yours covers so nothing gets counted twice.

Doc fee Emissions / smog testing charge (used vehicles)

Common questions

How much is the doc fee in Illinois?

Capped at $377.63 by law.

Can I refuse to pay the Illinois doc fee?

Generally no — dealers charge it on every deal and will not remove the line. What you can do is negotiate the total out-the-door price, which is what actually determines your cost.

Illinois doc fee cap: $377.63 and what it covers

What Illinois allows

Is it taxed, and is it negotiable?

What's specific to Illinois

Run your own numbers

Common questions

How much is the doc fee in Illinois?

Can I refuse to pay the Illinois doc fee?

More on buying a car in Illinois

Illinois: Sales tax rules

Illinois: Registration and title fees

Full Illinois out-the-door guide