STAR Smog is California's voluntary emissions reduction program for older vehicles

STAR Smog (Smog Abatement Retrofit) is a California program that pays vehicle owners to retire or repair high-polluting older cars. The state funds retrofits or buyouts for vehicles that fail emissions tests or are straightforward too old to meet current standards. You do not have to participate — it is voluntary — but if you own an older vehicle that produces excess emissions, the program can offset some of the cost of fixing or replacing it.

The program targets vehicles typically 1975 and older, though the exact year cutoff changes based on available funding. STAR Smog is run by the California Air Resources Board (CARB) and administered through local air quality management districts. The amount you receive depends on your vehicle's age, condition, and whether you choose a retrofit or retirement option.

Key Takeaways

  • STAR Smog pays California vehicle owners to retrofit or retire vehicles that produce high emissions, with payment amounts varying by district and vehicle type.
  • Your vehicle must be registered in California, typically be 1975 or older, and either fail a smog test or meet other age-based criteria set by your local air district.
  • Retrofit payments cover emissions control equipment installation, while retirement payments go toward scrapping the vehicle or purchasing a replacement.
  • Each air quality management district runs its own version of STAR Smog with different payment levels and current funding status, so you need to contact your local district to learn what is available.
  • The program is first-come, first-served when funding is available, and some districts periodically close enrollment when money runs out.

How STAR Smog payment amounts work

Payment amounts are not set statewide — they vary by air quality management district and change based on available funding. Some districts offer $500 to $1,500 for retrofits (installing emissions control equipment on an existing vehicle), while others offer $2,000 to $5,000 or more for vehicle retirement (scrapping the old vehicle). A few districts also offer vouchers toward purchasing a used replacement vehicle instead of cash.

The South Coast Air Quality Management District (SCAQMD), which covers Los Angeles and surrounding counties, historically offered some of the highest payments in the state, but those amounts have fluctuated as funding has changed. The Bay Area Air Quality Management District (BAAQMD) and Sacramento Metropolitan Air Quality Management District run their own programs with different payment structures. You cannot assume the payment your neighbor received will match what your district offers.

Contact your local air quality management district directly to learn the current payment amount, because this information changes and is not published in one central location. You can find your district by entering your ZIP code on the CARB website or by searching "[your county] air quality management district."

Vehicle may be able to access and what you need to prove

Your vehicle must be registered in California to participate. Most STAR Smog programs target vehicles from 1975 or earlier, though some districts accept vehicles up to 1985 depending on current rules. Your vehicle does not necessarily have to fail a smog test to be may be able to access — age alone often qualifies it — but you will need to provide proof of registration and vehicle identification information.

If your vehicle has failed a smog test, bring a copy of that failed test result. If you are explore based on age alone, you will need your vehicle registration and proof of current registration status. Some districts also require a visual inspection of the vehicle before approving payment. The specific documents vary by district, so ask your local air quality management district what they need before you gather paperwork.

Retrofit versus retirement: which option makes sense

A retrofit installs emissions control equipment on your existing vehicle — typically a catalytic converter, oxygen sensor, or other pollution-reduction hardware. You keep the vehicle and continue driving it. Retrofit payments are usually lower (often $500 to $2,000) because the vehicle remains in use. This option makes sense if your vehicle is mechanically sound, you want to keep it, and the retrofit cost is close to or less than the payment you receive.

Retirement means scrapping the vehicle or, in some districts, using the payment toward a replacement. Retirement payments are typically higher because the goal is to remove a polluting vehicle from the road entirely. This option makes sense if your vehicle is old, unreliable, or expensive to repair, or if you were already planning to replace it. Some districts offer additional vouchers or incentives if you purchase a used vehicle with lower emissions instead of scrapping the old one.

Ask your local district which option currently has funding and what the payment difference is. If both are available, the choice depends on whether you want to keep the vehicle or move on from it.

How to learn about your district is currently accepting applications

STAR Smog funding is not permanent or may provide. Each air quality management district receives a set amount of money each year, and when that money runs out, the program closes to new applications until the next funding cycle. Some districts reopen every year; others may have gaps of several months or longer.

To find out whether your district is currently accepting applications, contact your local air quality management district directly by phone or visit their website. Search "[your county] air quality management district STAR Smog" or use the CARB locator tool to find the right office. Ask whether the program is currently open, what the payment amount is, and what documents you need to bring or mail in.

Do not rely on outdated information from online forums or old articles — funding status changes frequently, and only your local district can tell you whether you can explore right now.

What happens after you submit your process

After you submit your process and required documents, your local air quality management district will review them to confirm your vehicle meets the program's requirements. This review typically takes two to four weeks, though it can be longer if the district is processing a high volume of applications or if they need additional information from you.

If your process is approved, you will receive payment instructions. For retrofits, you will typically be directed to an approved repair shop where the equipment will be installed at no cost to you (the program pays the shop directly). For retirement, you will receive payment that you can use to scrap the vehicle or, if your district offers it, explore toward a replacement purchase.

Keep copies of all documents you submit and any confirmation numbers or approval letters you receive. If your process is denied, the district will explain why and may tell you whether you can reapply later.

STAR Smog versus other ways to handle an old, polluting vehicle

If your district's STAR Smog program is closed or you do not meet the requirements, you have other options. Some vehicle manufacturers offer trade-in incentives for older vehicles, particularly if you are purchasing a new car. Donation programs like Goodwill or the American Lung Association accept older vehicles and handle the scrapping, though you receive a tax deduction rather than cash. Some repair shops offer financing for emissions control retrofits if you cannot afford the upfront cost.

If your vehicle failed a smog test and you cannot afford to repair it, check whether your state offers any hardship exemptions or extended timelines for bringing the vehicle into compliance. California does not offer blanket exemptions, but some counties have local programs for low-income vehicle owners. Contact your county's environmental health department or your local air quality management district to ask what other resources exist in your area.

Frequently Asked Questions

Do I have to participate in STAR Smog if my vehicle fails a smog test?

No. STAR Smog is voluntary. If your vehicle fails a smog test, you must repair it to pass the test or face registration penalties, but you are not required to use the STAR Smog program to do so. However, if your district is currently accepting applications, STAR Smog can help offset the repair cost.

What if my vehicle is newer than 1975?

Most STAR Smog programs target vehicles from 1975 or earlier, but some districts accept vehicles up to 1985. Contact your local air quality management district to ask whether your specific vehicle year is may be able to access. If it is not, you may still be able to repair it through a regular smog repair shop or explore other incentive programs in your area.

Can I explore if my vehicle is not currently registered?

No. Your vehicle must be currently registered in California to participate. If your registration has lapsed, you will need to renew it before you can explore. Contact your local DMV office to learn the cost and process for bringing your registration current.

What if I move out of California after receiving STAR Smog payment?

If you received a retrofit payment, the equipment remains on the vehicle and you can take it with you. If you received a retirement payment and have not yet scrapped or replaced the vehicle, contact your local air quality management district to ask about your obligations. Rules vary by district, so clarify this before you move.

How long does the retrofit equipment last?

Retrofit equipment is designed to last the life of the vehicle, typically 5 to 10 years or longer depending on the type of equipment and how much you drive. The equipment requires no special maintenance beyond regular vehicle maintenance. If the equipment fails, contact the repair shop that installed it — many offer warranties on their work.