About CarFeeCalc

Every figure on this site is traced to the state's own fee schedule, publication or statute — and the ones that could not be traced are labelled as estimates rather than dressed up as facts.

Why this site exists

Almost every vehicle fee calculator on the web has the same flaw: it asks you to type in your own sales tax rate. That is the hard part of the problem, and handing it back to the visitor is how a tool avoids being wrong rather than how it becomes right. Local rates move the total far more than registration fees do — a $30,000 car in Buckeye, Arizona carries roughly $600 more sales tax than the same car in Chandler.

The second flaw is subtler and more damaging: national calculators apply a single formula to fifty different rulebooks. Arizona charges a percentage of MSRP that depreciates every year. Kansas charges a flat fee by weight. Illinois charges $151 regardless of the car. South Carolina registers vehicles for two years at a time and caps its purchase tax at $500. No single formula survives contact with that.

So this site is built the opposite way round. Each state is a separate research problem with its own data file describing its actual model, and a shared engine that has grown one capability at a time as each state's rules demanded it.

Who researches it

CarFeeCalc is researched, built and maintained by Arif, a single person rather than a content team. That is worth stating plainly because it explains the shape of the site: 10 states published carefully rather than fifty generated quickly.

If you find something wrong, it reaches the person who can fix it. Write to hello@carfeecalc.com — corrections that cite a source are acted on first.

How a figure gets published

• Primary sources only. The state motor vehicle agency or revenue department's own fee schedule, its published PDF, or the statute. Aggregator sites and dealer blogs are treated as leads to check, never as evidence.
• Every page carries a verification date. Each state page lists the sources used and the date every figure on it was last confirmed.
• Unconfirmed means labelled, not omitted. Where a fee is real but the exact amount could not be confirmed, the calculator marks it as an estimate in the interface instead of presenting it as fact.
• Conflicting local rates get dropped. If two credible sources disagree on a city's rate, that city is removed rather than guessed at.
• Assumptions about trade-ins and rebates are never carried across state lines. They are the single most common source of error in other tools.
• Published worked examples are reproduced. Where a state publishes its own example calculation, the engine is tested against it, and that test stays in the suite permanently.

Where that discipline changed the answer

These are cases where following the statute produced a different number from what most calculators — and in some cases the state's own dealers — will tell you.

• IllinoisHome rule sales taxes legally exclude titled property, so Chicago’s well-known 10.25% rate does not apply to a car. Competing calculators apply it anyway and overstate the tax by hundreds of dollars.
• IllinoisThe $10,000 cap on the trade-in credit expired on 1 January 2022. Dealer sites and calculators still quote it as current.
• FloridaThere is no EV registration surcharge. The widely-republished “$200 rising to $250” came from a bill that never passed; the statute sets the EV licence tax equal to a petrol car.
• TexasSeparately stated manufacturer rebates are excluded from taxable consideration, so a rebate genuinely reduces the tax. That is rare enough that most tools assume the opposite.
• South CarolinaA trade-in does reduce the Infrastructure Maintenance Fee. The largest competitor openly states it “could not confirm” this.
• CaliforniaA trade-in reduces nothing at all — the CDTFA’s own worked example counts the trade-in as part of the purchase price.

How it is paid for

It is not, yet. There are no adverts, no affiliate links, no lead generation, no dealer or lender partnerships, and no sponsored placements anywhere on this site. Nothing in a result is influenced by who pays. If that ever changes it will be disclosed here first, and nothing that shapes a calculation will be for sale.

What it is not

These are estimates, not quotes, and not legal or tax advice. Dealer documentation fees vary by dealer and are deliberately excluded. Fee schedules change — sometimes mid-year — so confirm the final figure with your state agency or dealer before you sign anything.

What is coming

More states, on a rolling schedule, each one researched to the same standard before it goes live. The changelog records every launch and engine change with a date.