Illinois car tax calculator

In Illinois the tax on a private sale is not a percentage at all

Buy from a dealer in Illinois and it works the way you expect: 6.25% plus the local rate, with the trade-in deducted first.

Buy from a private seller and the state stops using a rate. It reads a flat amount off a table, and there are two tables. Below $15,000 the amount is set by the car's model year and the price is irrelevant. At $15,000 and above it is set by the price and the year is irrelevant.

On this page's $35,000 example that is $1,600 — against the $2,188 a 6.25% calculation would give you. And an older car bought cheaply is where the table really bites in the other direction: a 2015-or-earlier model under $15,000 costs $100 in tax whether you paid $14,000 or $800.

On that private-party tax no trade-in deduction is allowed, which is the second thing a generic calculator gets wrong about Illinois.

The car you hand over is worth more than the rate

Illinois taxes the price after the dealer's allowance for your old car. On a $35,000 purchase with $12,000 allowed for the trade, the taxable amount is $23,000 rather than $35,000.

That is worth $750 here — more than most people save by negotiating, and it happens automatically at the dealer's desk.

It also means selling privately is not always the better deal. Get $12,800 from a private buyer instead of $12,000 from the dealer and you are $800 ahead on the car, but you have given up the tax deduction — and in Illinois that deduction is worth more than that.

Handing over a car you still owe money on is the case to check. Several states compute the credit as the car's value minus the outstanding finance, so negative equity shrinks it.

Where you register the car changes the bill

On top of the state rate, Illinois lets local government add its own, broadly between 0% and 4.75%. On $35,000 the spread between the cheapest and the dearest local rate is $1,663.

Which rate applies is decided by an address — and states differ on whose. Some use the buyer's, so crossing a county line to buy saves nothing; others use the dealer's, so it can.

Local rates change more often than state ones, usually at the start of a quarter, so the rate that applied when you last bought a car may not be the rate now.

No annual tax on the car afterwards

Illinois does not charge an annual tax on the value of your car. Once the purchase tax is paid, what you owe each year is the registration fee, which is a fee rather than a tax and does not scale with what the car is worth.

That is worth weighing against states that do. A $35,000 car in a state with an annual vehicle tax can cost several hundred dollars a year to keep on the road before insurance and fuel, every year, for as long as you own it.

It also changes how the purchase tax should be read. A state with a high purchase tax and no annual one can be cheaper over five years than a state with a low purchase tax that bills you again each January.

The same rule at four different prices

Rates are easy to compare and hard to feel. These are the figures this page's rule produces at four prices, before any local rate and before any trade-in:

$10,000 → $0 · $25,000 → $1,350 · $45,000 → $1,600 · $80,000 → $2,600

The steps are visible because there is no rate underneath them — the tax jumps at each band boundary and is flat in between, so a car priced just under a threshold can cost hundreds less in tax than one priced just over.

Add the local rate to each of these where one applies, and remember that registration, title and any dealer documentation fee sit outside all of it.

Buying out of state, and why it rarely works

The idea is obvious enough: buy the car where the tax is low and register it at home. It almost never works, and the reason is the use tax.

Every state that charges a purchase tax also charges a matching tax on a vehicle brought in and registered there. You get credit for tax properly paid to the other state, so if the other state's rate was lower you pay the difference at home — and if it was higher, you do not get the excess back.

The version that does work is moving. Most states will not charge you again on a car you already owned and had registered in your own name elsewhere before you arrived, though several impose a time limit — typically that you owned it for a set number of days before the move.

Illinois's own rules on both of those are worth reading on the state's site before you plan around them, because the details — the deadline to register, the penalty for missing it — are where the money is.

What this figure does not include

This page answers one question: the tax the state charges on the purchase. It is usually the largest single line after the car itself, but it is not the whole out-the-door number.

Title and registration are separate and usually modest — tens of dollars rather than hundreds, though they vary by vehicle weight in some states.

The dealer's documentation fee is not a tax at all. Some states cap it, most do not, and in several it is itself part of the taxable price — so a high doc fee costs you twice.

Finance charges, insurance and extended warranties are outside this, although in a handful of states an extended warranty sold with the car is taxable.

And Illinois has fixed amounts of its own that are easy to miss: $25 — motorcycle, motor-driven cycle, ATV or motorized pedalcycle bought privately.

New or used changes more than the price

The tax on a used car is not simply a smaller version of the tax on a new one. Three things commonly differ, and Illinois is worth checking on each.

Who is selling. A dealer collects the tax and hands it over; a private seller does not, and you pay it yourself when you register. In Illinois that is not an administrative detail: a private sale is taxed by a completely different method, a flat amount from a table rather than a rate.

What the tax is computed on. A new car has an invoice price everyone agrees on. A used one has a price you negotiated and a published value that may be higher, and states differ on which they use.

What comes off first. Manufacturer rebates exist on new cars and not on used ones, and states split on whether a rebate reduces the taxable price. Two neighbours can take opposite views of the same $2,000 rebate.

The practical move is the same in every state: ask for the taxable amount in writing before you sign, not the purchase price. They are different numbers and only one of them is what you are taxed on.

Leases, gifts and cars that change hands within a family

A lease is not a purchase, and most states tax it differently — usually on the monthly payment as it is made rather than on the whole value of the car up front. That changes the total, and it changes who owes it if the lease ends early.

A gift is not a sale, but "no money changed hands" is not automatically an exemption. Several states tax a transfer at the car's value unless a specific family relationship applies, and the relationships that qualify are narrower than people expect: spouse, parent and child commonly qualify; step-relations, in-laws and grandparent-to-grandchild often do not.

Inheritance is usually treated separately again, and generally is not taxed as a purchase.

Each of these needs the right form at the counter. Turning up without it means paying the full amount and applying for it back afterwards, which is slower and sometimes not possible at all.

None of these is modelled by the figure on this page, which assumes an ordinary purchase at arm's length.

Why a car is taxed once here and twice elsewhere

A car is the only thing most households buy that can be taxed both when they buy it and every year they keep it. It is worth understanding why, because it decides which states are genuinely cheap.

The purchase tax is a sales tax or its replacement: a one-off levy on the transaction, generally going to the state's general fund or to roads.

The annual tax is a property tax in everything but name. It exists because a car is valuable property that moves, and taxing it where it is registered is how local government reaches it.

Illinois charges the first and not the second. That makes a car cheaper to keep here than the purchase rate alone suggests — and it means comparing Illinois against a state with a lower purchase tax but an annual one will mislead you unless you count several years at once.

The right comparison between two states is therefore never the headline rate on its own. It is the purchase tax plus however many years of annual tax you actually expect to own the car for.

How to check the number on your own paperwork

This takes two minutes at the dealer's desk and is the only way to know the figure is right before you have paid it.

Find the taxable amount, not the purchase price. They differ whenever a trade-in, a rebate or a discount is involved, and the tax should have been computed on the first of them.

Check what rate was applied to it. In Illinois you are looking for 6.25% under the name use tax, not for the state's sales tax rate.

Check the doc fee is not hiding in the tax line. It is a dealer charge, not a tax, even in states where it is itself taxable.

Keep the bill of sale. It is what you will need if the registration figure disagrees with the dealer's, and it is the document an amended assessment starts from.

If the number is wrong, it is far easier to correct before the title is issued than after. Once the tax is paid and the car is titled, correcting it means a refund claim rather than a correction.

Electric and hybrid cars

The purchase tax in Illinois does not change because a car is electric: the rate is the same rate, applied to the same price. What changes around electric cars is everything next to the tax.

Registration fees are where most states have responded to electric cars, adding a flat annual charge to replace the fuel tax those cars do not pay. It is a fee rather than a tax and sits outside this calculation.

Federal credits reduce what you pay for the car, not what you are taxed on, and they arrive through your tax return rather than at the dealer's desk unless the dealer applies them at the point of sale.

Manufacturer rebates and dealer discounts follow whatever rule Illinois applies to any other car, which is worth checking separately: in some states a rebate reduces the taxable price and in others it does not.

The one place electric cars do change the tax itself is Washington DC, where the rate depends on fuel economy and an electric car has its own band.

Putting the number in your budget, not in your surprise

The tax is the second largest figure in a car purchase and the one most often discovered late, because the negotiation happens on the price and the tax is computed afterwards on whatever price you agreed.

Budget it as part of the car, not as a fee. On $35,000 in Illinois the state tax alone is $1,600, before any local rate. On a financed purchase it is usually rolled into the loan, so you pay interest on it for the life of the agreement.

Negotiate the trade-in and the price together. In Illinois the tax follows the difference between them, so a dealer who raises your trade-in allowance by $1,000 while raising the car's price by $1,000 has left you in the same place on cash and $0 different on tax — but one who genuinely raises the allowance has saved you tax as well.

Check the rate for your own address before you commit where a local rate applies. A percentage point on $35,000 is $350, which is more than most people save on the whole negotiation.

And if you are choosing between two states because of a job or a move, run the five-year figure rather than the purchase one. The purchase tax is paid once; an annual vehicle tax is paid for as long as you keep the car.

What Illinois takes from one car over five years

A single figure hides the difference between states. This is the same $35,000 car, held for five years, counting only what Illinois charges as tax:

Purchase tax $1,600, and then nothing further. Five years of ownership in Illinois costs what the first day cost, because there is no annual tax on the car's value.

Set that against the states at each extreme. A state with an annual vehicle tax keeps billing: several hundred dollars a year on a car of this value, every year, which over five years can exceed the purchase tax entirely.

The car also depreciates, and in the states where the annual tax is tied to the original list price rather than the current value — Maine, Nebraska and Nevada all work that way — it falls on a fixed schedule regardless of what the car is actually worth.

None of this is an argument for moving. It is an argument for comparing the same thing in both places before deciding that one of them is cheap.

Who collects it, and when you actually pay

The tax is owed on the transaction, but the moment it leaves your account depends on who sold you the car — and that catches people out more often than the rate does.

From a dealer, the tax is normally collected at the desk and handed on with your title application, so it is part of the out-the-door figure you sign for. Financed purchases usually roll it into the loan.

From a private seller, nobody collects it at the time. You pay it yourself when you register the car, which is days or weeks later, and by then the money for the car is already gone. This is the version people describe as an unexpected bill.

From out of state, it is due at registration too, as use tax, with credit for tax properly paid to the other state.

Deadlines matter here: most states give you a window to title and register after the purchase, and missing it means a penalty on top of the tax rather than a late fee on the registration.

Where car tax estimates go wrong

Using the state's general sales tax rate. More than half the country charges something else on a vehicle — a different rate, a different name, a cap, a flat fee, or a ladder. Illinois is one of them, which is the whole reason this page exists.

Forgetting the trade-in, or assuming it counts. It is the biggest single lever in the calculation and the states genuinely disagree about it.

Applying a combined rate to the whole price. Several states cap the local part, or the state part, or both.

Reading last year's rate. Vehicle tax rules move: Washington raised its extra vehicle charge on 1 January 2026, Louisiana raised its state rate on 1 January 2025, and DC stopped exempting electric cars on 17 February 2025.

Taking the price on the bill of sale as the taxable amount. In several states the tax is computed on a published value when the declared price is low.

Where these figures come from

Every number on this page was read in a document published by the body that sets it, and the date it was read is recorded with it.

Illinois Department of Revenue — RUT-5, Private Party Vehicle Use Tax Chart for 2026 (effective 1 January 2026 through 31 December 2026). Read 2026-09-14.

Illinois Department of Revenue — Use Tax Rates. Read 2026-09-14.

Nothing here comes from a compiled table of state rates. We checked one during this work — a rate chart published by a state revenue department listing every other state — and its own small print says it should not be used to determine tax due to another state. It was useful for catching an error in our own data and useless as a source, which is exactly what a second-hand figure is.

If a rate changes and this page has not caught up, the date above is how you will know.

Illinois car tax questions

How much is car tax in Illinois?

On a $35,000 car, $1,600 in state tax, before the local rate. Illinois is the state where who you buy from changes the arithmetic completely.

Does Illinois charge sales tax on a car?

Not as such. What Illinois charges is a use tax at 6.25%, which replaces sales tax on a vehicle. It is why the paperwork never mentions sales tax and why a sales-tax calculator gives the wrong figure here.

Does a trade-in reduce car tax in Illinois?

Yes. The tax is computed on the price after the dealer's trade-in allowance. On a $35,000 car with $12,000 allowed, that saves $750.

Is there an annual car tax in Illinois?

No. Once the purchase tax is paid there is no annual tax on the car's value — only the registration fee, which does not scale with what the car is worth.

Can I buy a car in a cheaper state and register it in Illinois?

Generally no. Illinois charges a use tax on a vehicle brought in and registered here, with credit for tax properly paid elsewhere — so a lower rate abroad means you pay the difference at home, and a higher one means you do not get the excess back. Moving is different: a car you already owned and had registered in your own name before you arrived is usually treated differently, often subject to a minimum period of prior ownership.

What is not included in this figure?

Title and registration fees, the dealer's documentation fee, finance charges and insurance. The doc fee is worth watching: it is not a tax, few states cap it, and in several it forms part of the taxable price, so a large one costs you twice. Illinois also has fixed amounts of its own: $25 (motorcycle, motor-driven cycle, ATV or motorized pedalcycle bought privately).

Where do these 2026 figures come from?

Illinois Department of Revenue, RUT-5, Private Party Vehicle Use Tax Chart for 2026 (effective 1 January 2026 through 31 December 2026); Illinois Department of Revenue, Use Tax Rates — each read on 2026-09-14. Not from a compiled table of state rates: we use those only to cross-check our own reading, because the one published by a state revenue department says in its own small print that it must not be used to determine tax due to another state.