Vehicle Smog Check Cost & State Inspection Fee Estimator
Find out if your vehicle needs a California smog check, which test it gets, what it should cost in your area, and how much to keep aside if it fails. Built on BAR and DMV rules and 2025 statewide price data.
How Much Does a Smog Check Cost?
In California, a smog check for a 2000-or-newer gasoline car usually costs $40 to $70 for the inspection, plus the state’s $8.25 certificate fee when the car passes. SmogCheck.com’s 2025 California price report put the statewide average at $56.38 including the certificate, and forecast about $60 for 2026.
| Vehicle | Typical total you pay | Why |
|---|---|---|
| Gasoline car, 2000 and newer | $45 – $80 | Quick computer (OBD) test |
| Hybrid | $55 – $90 | About $8 more on average |
| Diesel, 1998 and newer | $60 – $100 | About $17 more on average |
| Gasoline, 1996–1999 | $90 – $110+ | Tailpipe test on a dynamometer |
| Gasoline, 1976–1995 | $110 – $140 | Tailpipe test plus fuel-evaporation (LPFET) test |
| Motorhome / RV | $100 – $200 | Size, time and equipment |
Swipe the table sideways to see every column.
Totals include the $8.25 certificate. The Bureau of Automotive Repair (BAR) does not set inspection prices, so every station chooses its own. That is why the same test can cost $35 at one shop and $80 at another a mile away.
How to Use the Smog Check Cost Calculator
- Pick why you need the test. Renewal, a sale or bringing a car from another state have different rules.
- Enter the fuel type, model year and weight class. These decide whether a smog check is required at all and which test your car gets.
- Say whether your DMV notice requires a STAR station, where you live, which station type you prefer and whether you will use a coupon.
- Describe the car’s condition. The check engine light and recent battery or repair work have the biggest effect on whether you pass.
- Read the result: whether you need a test (and what you pay instead if you don’t), the test type, a low / typical / high price, the $8.25 certificate, your pass risk, a worst-case budget and a checklist for test day.
What Is Included in a Smog Check Cost?
- Visual inspection: the technician checks that emissions parts such as the catalytic converter, EGR valve and fuel cap are present and correctly connected.
- Functional checks: the check engine light must work and be off, and the fuel cap is tested for leaks.
- The emissions test itself: a computer (OBD) test for 2000 and newer vehicles, or a tailpipe test for older ones.
- The electronic certificate: sent straight to the DMV when you pass, for $8.25.
Not included: any repairs, a VIN verification for out-of-state cars (done by the DMV or a licensed verifier), and DMV registration fees. Some stations also add a small “transmission” or convenience fee, so ask for the out-the-door price.
Smog Check Inspection Fee vs. Certificate Fee
| Inspection fee | Certificate fee | |
|---|---|---|
| Set by | Each station | State of California |
| Amount | Usually $30 – $90 | $8.25, fixed |
| Charged when | Every test, pass or fail | Only when you pass |
| Can a coupon reduce it? | Yes | No |
Swipe the table sideways to see every column.
A “$29.95 smog check” advert usually means the inspection fee only. At the counter you will pay at least $38.20 once the certificate is added, and more for pre-2000 vehicles or trucks.
Fees you may pay instead of a smog check
- Smog abatement fee: gasoline vehicles in their first eight model years skip the biennial smog check and pay this fee with registration instead (about $25 a year).
- Smog transfer fee: when a vehicle four model years old or newer is sold, the buyer pays $8 instead of getting a smog check.
STAR Station vs. Non-STAR Smog Check Cost
STAR stations meet higher performance standards set by BAR. Your DMV renewal notice will say “Smog Certification Required at a STAR Station” if your vehicle is directed there. BAR directs vehicles that its data says are more likely to fail, plus a random share of other vehicles.
- Price: STAR is a quality rating, not a price tier. Stations set their own prices, and many STAR stations charge the same as non-STAR shops nearby. Expect a small premium at most.
- If directed to STAR: only a STAR-certified station can issue your certificate. A test at a regular station will not count.
- If not directed: you can use any licensed station, including a STAR one.
Many STAR stations are also test-only. Search BAR’s station locator for “STAR” and compare two or three prices.
Test-Only vs. Test-and-Repair Smog Check
| Test-only station | Test-and-repair station | |
|---|---|---|
| What they do | Tests only; cannot repair | Tests and fixes emissions problems |
| Average price (one 2026 survey) | About $62 | About $71 |
| Best for | Cars you expect to pass; an unbiased result | Cars likely to need work; one stop |
| If you fail | Go elsewhere for repairs, come back to retest | Repair on site, retest on site |
Swipe the table sideways to see every column.
A test-only station earns nothing from repairs, which some drivers prefer. A test-and-repair shop is handier when you already know the car has a problem. Either can be STAR-certified.
What Factors Affect Smog Check Cost?
- Model year: the biggest factor. 2000 and newer cars get a quick computer test; 1999 and older cars need a tailpipe test on a dynamometer, and 1976–1995 cars also need a fuel-evaporation (LPFET) test that adds about $25–$30.
- Fuel type: hybrids cost about $8 more and diesels about $17 more than gasoline cars on average.
- Size: heavier trucks and vans often cost about $10 more; motorhomes can cost over $100.
- Location: San Francisco, San Mateo, Santa Clara and Orange counties are the most expensive; rural areas are the cheapest.
- Station type and coupons: test-only stations and online booking deals are usually cheaper.
- Retests: a failed test can mean paying twice unless the station offers a free retest.
Fewer stations still have the dynamometer needed for pre-2000 cars, as older BAR-97 test equipment is retired. If you own a 1990s car, call ahead to make sure the station can test it.
Does Vehicle Type Affect Smog Check Cost?
| Vehicle type | Needs a smog check? | Test |
|---|---|---|
| Gasoline, 1975 and older | No, exempt | — |
| Gasoline, 1976–1999 | Yes | Tailpipe (dynamometer or two-speed idle); LPFET for 1976–1995 |
| Gasoline, 2000 and newer | Yes, after the first eight model years | OBD computer test |
| Hybrid | Yes, like gasoline | OBD computer test |
| Diesel, 1998 and newer, up to 14,000 lbs | Yes | Diesel inspection |
| Diesel 1997 and older, or over 14,000 lbs | No (heavy trucks follow CARB’s Clean Truck Check instead) | — |
| Natural gas over 14,000 lbs | No | — |
| Fully electric | No | — |
| Motorcycle | No | — |
Swipe the table sideways to see every column.
Smog checks are required in 33 of California’s 58 counties; some rural ZIP codes are exempt. Your DMV renewal notice always says whether you need one.
What Happens If Your Vehicle Fails a Smog Check?
- You get a Vehicle Inspection Report showing why it failed. You pay the inspection fee but not the $8.25 certificate.
- Take the car to a licensed Smog Check repair station (or any mechanic you trust) and fix the listed problems. Keep itemized receipts.
- Drive normally for a few days so the car’s readiness monitors complete, then retest. If your notice said STAR, the retest must be at a STAR station.
- When it passes, the certificate goes to the DMV electronically and you can finish your registration.
Common reasons for failing
- Check engine light on (automatic fail on 2000+ vehicles).
- Readiness monitors not complete after a battery change or cleared codes.
- Worn catalytic converter, faulty oxygen sensor or EGR valve.
- Leaking fuel cap or evaporative (EVAP) system.
- Missing or non-approved aftermarket parts (parts need a CARB Executive Order number).
Smog Check Cost After a Failed Test
| Cost | Typical amount |
|---|---|
| Retest | Free to full price, depending on the station |
| Fuel cap / small EVAP leak | $20 – $300 |
| Oxygen sensor | $200 – $500 |
| EGR valve or vacuum leak | $150 – $800 |
| CARB-approved catalytic converter | $1,000 – $2,500+ |
Swipe the table sideways to see every column.
Repair prices are typical shop ranges and vary by vehicle. The state offers help through BAR’s Consumer Assistance Program (CAP):
- Repair assistance: income-eligible owners (household income at or below 225% of the federal poverty level) can get up to $1,450 of emissions repairs for 1996 and newer vehicles, or $1,100 for 1995 and older, with a co-pay.
- Vehicle retirement: $1,350 for any owner whose car failed its last smog check, $1,500 for income-eligible owners, or $2,000 for income-eligible owners whose car failed.
- Repair cost waiver: if the car still fails after you have spent at least $650 on qualifying repairs by a licensed technician, a Smog Check Referee can grant a one-time waiver so you can register for one more cycle.
Apply for CAP before paying for repairs, because repairs done first are not reimbursed.
How to Compare Smog Check Prices
- Ask for the out-the-door price for your exact vehicle: year, fuel type and weight. Include the $8.25 certificate and any extra fees.
- Ask about retests: is a retest free, and within how many days?
- Check the station type: STAR if your notice requires it; test-only if you just want the test.
- Look for online coupons or booking discounts; they often take $10–$15 off the inspection fee.
- For pre-2000 cars, confirm they still have a dynamometer before you drive over.
- Check the licence on BAR’s station search; avoid anyone offering a “guaranteed pass”.
Smog Check Cost FAQs
Most 2000-and-newer gasoline cars pay about $40 to $70 for the inspection, plus the state’s $8.25 certificate fee when the car passes. SmogCheck.com’s 2025 market report put the statewide average at $56.38 including the certificate. Pre-2000 cars, diesels and motorhomes cost more.
It is a fixed state fee for the electronic smog certificate that the station sends to the DMV. It is charged only when your vehicle passes. Stations cannot discount it, so a coupon lowers the inspection price but never the $8.25.
Not necessarily. STAR is a performance certification, not a price tier, and each station sets its own price. Price surveys show test-only stations are often a little cheaper than test-and-repair stations. If your DMV notice says STAR, you must use a STAR station, so compare a few.
Gasoline vehicles in their first eight model years skip the every-two-years smog check and pay a smog abatement fee with registration instead. When a vehicle four model years old or newer changes owner, the buyer pays an $8 smog transfer fee instead of getting a smog check.
Yes. For 2000 and newer vehicles the test reads the car’s computer, and an illuminated check engine light is an automatic fail. Fix the problem first, then drive normally for a few days so the car’s self-tests (readiness monitors) finish before you go back.
It depends on the station. Many offer a free or discounted retest within a set number of days if you come back to them after repairs; others charge the full price again. Ask before your first test. The $8.25 certificate fee is only paid once, when you pass.
Yes. Through BAR’s Consumer Assistance Program, income-eligible owners can get up to $1,450 of emissions repairs for 1996 and newer vehicles ($1,100 for 1995 and older), with a co-pay. Owners can instead retire a failing car for $1,350, or up to $2,000 if income-eligible.
A passing smog certificate is valid for 90 days for DMV purposes. Get the test close to your registration due date or sale, not months in advance.
No. Fully electric vehicles are exempt. Hybrids are not exempt: once they are past the new-vehicle period they need a smog check like a gasoline car, usually at a small premium.