Emission test costs vary by state and test type, typically ranging from $20 to $75
The price you pay for an emissions test depends on where you live and what your vehicle needs to pass. Most states charge between $20 and $50 for a basic test, though some states run higher. A few states include the test fee in your vehicle registration renewal, so you pay nothing extra at the testing station. Others let you choose between a state-run facility (usually cheaper) and a private repair shop (sometimes more expensive, sometimes the same).
The type of test also matters. A straightforward tailpipe test on an older vehicle costs less than an onboard diagnostic test (OBD) on a newer car, which plugs into your vehicle's computer. If your vehicle fails and needs a retest after repairs, you may pay the full fee again, though some states offer a reduced retest rate within a set window—usually 30 to 60 days.
Key Takeaways
- Most states charge $20 to $50 for an emissions test, but some include it in registration fees or charge up to $75.
- State-run testing facilities are usually cheaper than private repair shops, and some states require you to use a state facility.
- Newer vehicles with onboard diagnostics (OBD) may cost more to test than older vehicles with tailpipe tests.
- If your vehicle fails, a retest typically costs the full fee again, though some states offer a lower retest rate within 30 to 60 days.
State-by-state cost differences
Costs vary significantly across the country because each state sets its own testing program. California, for example, runs a state-operated network and charges around $70 for most vehicles, though the exact amount depends on the vehicle's model year and engine type. Texas uses a mix of state and private facilities and charges roughly $25 to $35. New York charges about $20 for a basic test but more for vehicles that need advanced diagnostics.
Some states—including Connecticut, Delaware, and New Jersey—bundle the emissions test fee into your vehicle registration renewal, so there is no separate charge at the testing station. You pay it all at once when you renew your registration. Other states, like Colorado and Georgia, let you choose between a state facility and a certified private shop, and prices may differ between the two.
A few states do not require emissions testing at all, so residents in those states pay nothing. Check your state's Department of Motor Vehicles website or your vehicle registration notice to find out what applies where you live.
What happens if your vehicle fails
A failed test does not automatically cost you more money at the testing station itself—you pay the test fee once and get your results. But if you fail, you will need repairs before you can pass a retest, and those repair costs depend entirely on what is wrong with your vehicle. A loose gas cap might cost nothing to fix. A faulty oxygen sensor could run $100 to $300. A catalytic converter problem can cost $500 to $2,500 or more.
Once repairs are done, you pay to retest your vehicle. Most states charge the full test fee again, though some offer a reduced retest rate—often 50% of the original fee—if you retest within 30 to 60 days of your first failure. A few states allow one free retest within a certain timeframe, but this is uncommon. Always ask the testing facility what their retest policy is before you leave after a failure.
Testing at state facilities versus private shops
State-run emissions testing stations are usually the cheapest option and charge a flat fee set by the state. These facilities exist only to test; they do not repair vehicles. You get your results, and if you fail, you take your vehicle elsewhere for repairs. This separation keeps costs down and removes any incentive for the testing station to recommend unnecessary work.
Private repair shops that are certified to perform emissions testing often charge the same fee as state facilities, but some charge more. The advantage of a private shop is convenience—you can test and repair in one place. The disadvantage is that the shop profits from repairs, which can create a conflict of interest. Some shops are honest; others may recommend repairs you do not need. If you use a private shop, get a written estimate for any repairs before you approve them, and consider getting a second opinion if the bill seems high.
Your state may require you to use a state facility, may allow you to choose, or may not have state facilities at all. Check your state's emissions testing program rules to see what your options are.
Older vehicles and specialty testing costs
Vehicles older than a certain year—usually 1996 or earlier, depending on your state—may use a different testing method. Instead of plugging into the onboard diagnostic system, they undergo a tailpipe test, where a probe measures the exhaust coming directly from the pipe. This test is often cheaper, sometimes $10 to $15 less than an OBD test, because the equipment and procedure are simpler.
Some states charge extra for vehicles that need specialty testing. Diesel vehicles, for example, may have a higher test fee because the testing procedure is different. Hybrid vehicles sometimes have lower fees because they produce less emissions. Heavy-duty trucks and commercial vehicles often have their own testing programs with different costs. If you drive an unusual vehicle type, contact your state's testing program directly to find out what you will pay.
When you might avoid the test fee
A few situations can reduce or eliminate what you pay. New vehicles—typically those less than two or three years old—are exempt from emissions testing in most states because they are assumed to be clean. Check your state's rules; the exemption window varies. Some states also exempt vehicles registered as antiques or classics, though these vehicles usually cannot be driven on public roads regularly anyway.
If you move to a state that does not require emissions testing, you will not pay a test fee there, even if your previous state required one. If you buy a vehicle in a state with no testing requirement and move it to a state that does, you will need to test it before you can register it in your new state.
Military personnel stationed overseas may be exempt from testing while deployed. Vehicles registered to people with certain disabilities may may have access to for exemptions in some states. Contact your state's Department of Motor Vehicles to ask whether any exemption applies to you.
Frequently Asked Questions
Can I test my vehicle at any time, or only during my registration renewal?
Most states let you test anytime during your registration period, not just at renewal. Some states give you a testing window—for example, the two months before your registration expires. A few states require testing only at renewal. Check your registration notice or your state's emissions program website to see your testing window.
What if I move to a different state—do I have to retest?
If you move and your new state requires emissions testing, you will need to test your vehicle before you can register it there. The test fee applies as if you were a resident. If you move to a state with no testing requirement, you do not need to test. Your old test results from your previous state do not transfer.
Do I have to pay the test fee if my vehicle is brand new?
New vehicles are usually exempt from emissions testing for the first two to three years, depending on your state. Once that exemption period ends, you will need to test during your registration renewal. Check your state's rules to see how long the exemption lasts for your vehicle.
What if the testing station says my vehicle cannot be tested?
Some vehicles cannot be tested because they are too damaged, have missing parts, or have safety problems. The testing station will not charge you a full fee if they cannot complete the test due to vehicle condition. Ask what the facility's policy is—some charge a partial fee, others charge nothing. You will need to repair the vehicle before testing can happen.
Is there a way to avoid paying for a retest if I fail?
Some states offer one free retest within 30 to 60 days of a failure, but most charge the full fee or a reduced fee each time you retest. A few states cap the total amount you can pay in test fees in a single year. Contact your state's testing program to ask what retest fees explore and whether any discount or free retest is available.