How to Register a Car in Illinois (Step by Step)

To register a car in Illinois, apply to the Secretary of State for title and registration within 20 days of purchase — via a dealer's electronic filing or Form VSD-190 — and pay the title fee, registration fee, and tax due on Form RUT-50 (private sale) or RUT-25 (out-of-state dealer).

Illinois runs vehicle titles and registration through the Secretary of State (SOS) — not a 'DMV' — and taxes the transaction through the Department of Revenue at the same time. That two-agency structure is why every Illinois registration involves both a title/registration application and a tax form (RUT-50 or RUT-25), and why first-timers find the paperwork confusing.

Here's the full process for a private-party purchase, a dealer purchase, and an out-of-state move — plus the fee categories, the tax forms decoded, plate transfers, and the vehicle checks worth doing before any of it.

Who files what: dealer vs private sale vs new resident

Buy from an Illinois dealer and the dealer usually handles everything through the SOS Electronic Registration and Title (ERT) system: title, registration, plates, and taxes are filed for you, and your costs appear as line items on the purchase contract. You drive away with temporary tags and wait for the plates and title to arrive.

Buy privately, and the work is yours: you have the seller assign the title to you, then submit an Application for Vehicle Transaction(s) (Form VSD-190) with the signed-over title, the RUT-50 tax form, and payment to the SOS — within 20 days of purchase. You can do this at an SOS facility or through some remittance agents; the VSD-190 itself is generated at a facility or via the SOS's Electronic Registration and Title system rather than downloaded.

Moving to Illinois? New residents must title and register their vehicles with the SOS shortly after establishing residency (the SOS's stated framework is within 30 days). You'll surrender your out-of-state title, complete the application, and pay Illinois fees; tax on a vehicle you already own is generally handled through the RUT-50 with credit or exemption provisions — verify your situation at ilsos.gov.

The tax forms: RUT-50 vs RUT-25

Illinois taxes vehicle transfers through two main forms. RUT-50 (Private Party Vehicle Use Tax) applies when you buy from a private individual; the tax is a flat amount from a statutory table based on the vehicle's age or price bracket rather than a straight percentage, with special flat rates for transfers between close family members.

RUT-25 (Vehicle Use Tax) applies when you buy from an out-of-state dealer and bring the vehicle into Illinois; the tax is percentage-based (the state use-tax rate plus applicable local taxes) on the purchase price, with credit for tax properly paid to the other state. Buy from an Illinois dealer and neither form is your problem — the dealer collects retailers' occupation tax on Form ST-556 instead.

Both RUT forms are due at the time you apply for title — the SOS won't process the title without the tax form and payment. Current tax tables and rates live on the Illinois Department of Revenue site; check them rather than trusting a seller's estimate.

Fees: what you'll actually pay

Illinois fees come in three buckets: the title fee, the registration (plate) fee, and the tax from the RUT form. As of recent published schedules, the standard title fee is in the neighborhood of $165 and standard passenger-plate registration around $151 per year — but Illinois has raised these several times in recent years, so verify current amounts at ilsos.gov before budgeting.

Illinois registration cost categories (verify current amounts at ilsos.gov)
Cost category	Applies to	Notes
Certificate of title fee	Every ownership transfer	Roughly $165 as of recent published schedules; corrected/duplicate titles cost less
Passenger registration fee	Standard plates, per year	Roughly $151/year as of recent schedules; electric vehicles pay a surcharge
Plate transfer fee	Moving your existing plates to the new vehicle	Around $25 as of recent schedules — much cheaper than new plates mid-cycle
RUT-50 tax	Private-party purchases	Flat table amount by vehicle age/price; reduced flat rate for close family transfers
RUT-25 tax	Out-of-state dealer purchases	Percentage of purchase price, less credit for tax paid to the other state
Local/miscellaneous	Varies	Some municipalities require separate city vehicle stickers

Timelines, plates, and the sticker

The core deadline: apply for title and pay tax within 20 days of purchase to avoid penalties. Registration is issued alongside the title application; you'll get plates (or transfer your old ones) and an annual sticker. Renewals run on a staggered schedule tied to your plate, and Illinois offers online renewal for most passenger vehicles.

Plate transfers deserve a mention because they save real money: if you already hold valid Illinois plates from a vehicle you sold, transferring them to the new car costs a small transfer fee rather than a fresh registration fee, and your existing sticker remains valid until its normal expiration.

Get the title properly assigned by the seller — signatures, date, odometer disclosure — before money changes hands; SOS facilities reject incomplete assignments.
Bring proof of insurance; Illinois requires liability coverage and conducts random verification.
File within 20 days — late tax filings accrue penalties and interest through the Department of Revenue.
If there's a lien on your new title (financed purchase), the lender is recorded and typically holds the electronic title until payoff.

Before you register: check the vehicle

Illinois will happily title a car that turns out to be a rebuilt wreck, a flood victim, or an odometer-rollback special — the SOS records the title, it doesn't vet the vehicle. Once the RUT-50 tax is paid and the title fee spent, unwinding a bad private-party purchase is somewhere between painful and impossible.

So do the Illinois title check yourself, before the facility visit: run the VIN through a history report to verify the title is clean (no salvage, rebuilt, or flood brands from Illinois or any other state), confirm there's no outstanding lien that would follow the car, and check the odometer history against what the seller's disclosure claims. It's a $1 step that protects a four-figure transaction.

Verify title brands across all states — a car rebranded 'clean' in Illinois can carry salvage history elsewhere.
Check for active liens before paying; a recorded lienholder outranks your new title.
Compare the odometer disclosure to the mileage trail in the history report.
Decode the VIN to confirm the car is exactly what the ad says (trim, engine, model year).

Bottom line

Registering a car in Illinois is a two-part transaction: the SOS title/registration application and the Department of Revenue tax form (RUT-50 for private sales, RUT-25 for out-of-state dealer buys), both due within 20 days of purchase. Budget for the title fee, the annual plate fee, and the tax — verifying current amounts at ilsos.gov since Illinois adjusts them regularly — and transfer your existing plates when you can. Most importantly, run a VIN history check before you buy: Illinois records whatever title it's handed, so brand, lien, and odometer verification is on you.

Frequently asked questions

How long do I have to register a car in Illinois after buying it?

Apply for title and pay the applicable tax within 20 days of purchase. Filing late exposes you to tax penalties and interest. New Illinois residents should title and register shortly after establishing residency — the SOS framework is within 30 days.

What is the difference between RUT-50 and RUT-25 in Illinois?

RUT-50 covers private-party purchases and charges a flat tax from a statutory table based on the vehicle's age or price. RUT-25 covers vehicles bought from out-of-state dealers and charges percentage-based use tax on the price, with credit for tax paid to the other state.

How much does it cost to register a car in Illinois?

Three main pieces: the title fee (roughly $165 as of recent published schedules), the annual passenger registration (roughly $151), and the RUT-50 or RUT-25 tax. Illinois has raised fees several times recently, so verify current amounts at ilsos.gov before you go.

Can I transfer my old Illinois plates to my new car?

Yes — if the plates are registered to you and valid, you can transfer them for a small fee (around $25 as of recent schedules) instead of paying for new registration, and your current sticker stays valid until its normal expiration.

How do I check an Illinois car title before buying?

Run the VIN through a vehicle history report to see title brands (salvage, rebuilt, flood) from Illinois and every other state, active lien records, and the odometer trail. The SOS records titles but doesn't vet vehicle history, so pre-purchase verification is the buyer's job.