Emissions Inspection in California: Requirements, Cost & Exemptions
Whether you're buying, selling, or renewing registration in California, here's exactly what the emissions inspection program requires and what it costs.
Quick Reference
Is It Required?
Yes — Smog Check required
California Smog Check Program applies to gasoline vehicles 1976 and newer. Diesel vehicles 1998+ over 14,000 GVWR require testing. Required at sale and biennially.
Counties Affected
All urban counties + many suburban (52 of 58 counties)
Most California counties require Smog Check. Some rural counties (Alpine, Modoc, Mariposa, Plumas, Sierra, Trinity) are exempt.
Test Types
- ASM (Acceleration Simulation Mode) for 2000-newer gasoline
- OBD-II only for 2000+ vehicles
- Visual inspection of emissions equipment
- Smoke opacity test for diesel
Cost & What to Expect
Typical cost: $30–$80 depending on smog station
Test-only stations cost less ($30–$50). Test-and-repair stations cost more ($50–$80) but can fix issues on-site.
Exemptions
- Vehicles older than 1975 (pre-OBDII)
- Hybrid vehicles built before 2000
- Electric vehicles (BEV)
- Motorcycles
- Diesel vehicles 1997 and older
- Vehicles in non-program counties
If Your Vehicle Fails
CAP (Consumer Assistance Program) offers $500–$1,200 toward repairs
If your vehicle fails and income qualifies, the BAR CAP program provides up to $1,200 in repair assistance or $1,500 to retire the vehicle.
California Standout Rule
California-Specific Facts for Emissions Inspection
California Vehicle transfer fees and requirements
In California, the title transfer fee is $23 and registration costs $46 base fee plus additional fees. Vehicle sales are subject to 7.25% base state rate; total can reach 10.25% with local taxes. California does not require notarization for private-party vehicle transfers. Emission testing is required in California — verify the vehicle passes before completing the sale.
- Smog certification required for vehicles 4+ model years old
- REG 262 form required for title transfer
- Use tax due within 30 days if purchased from a private party
- Smog transfer fee of $8 applies
Official California bill of sale form
The official California bill of sale form is REG 135 (Bill of Sale). BillOfSaleNow generates a document that meets all California requirements and can be used in place of the official form.
California sales tax on vehicle purchases
California has a 7.25% state sales tax rate. 7.25% base; county/city adds 0.25–3.25% (total up to 10.75%). Private-party vehicle sales in California are subject to sales tax. Use tax applies to private party purchases at the same rate. The title transfer fee is $23.
California bill of sale statistics
BillOfSaleNow has generated 14,217 bill of sale documents for California transactions, with 382 generated this month alone. The most popular vehicle type is car.
More California Vehicle Guides
- Leasing vs Buying in California
- Mechanic's Lien on Vehicle in California
- New Resident Vehicle Registration in California
- Out-of-State Buyer Vehicle in California
- License Plate Transfer in California
- Rebuilt Title Cars in California
Each guide is written specifically for California laws, agencies, and procedures. Bookmark for future reference.
Frequently Asked Questions
Is emissions inspection required in California?
Yes — Smog Check required. California Smog Check Program applies to gasoline vehicles 1976 and newer. Diesel vehicles 1998+ over 14,000 GVWR require testing. Required at sale and biennially.
How often do I need an emissions test in California?
Every 2 years for registration; at every vehicle sale. Smog Check is part of biennial registration renewal in affected counties. Sellers must provide a passing smog certificate not more than 90 days old at sale.
How much does an emissions inspection cost in California?
$30–$80 depending on smog station. Test-only stations cost less ($30–$50). Test-and-repair stations cost more ($50–$80) but can fix issues on-site.
Who is exempt from emissions testing in California?
Exempt categories include: Vehicles older than 1975 (pre-OBDII), Hybrid vehicles built before 2000, Electric vehicles (BEV), and others. See full list on the official agency site.
What happens if my vehicle fails emissions in California?
CAP (Consumer Assistance Program) offers $500–$1,200 toward repairs. If your vehicle fails and income qualifies, the BAR CAP program provides up to $1,200 in repair assistance or $1,500 to retire the vehicle.
Selling After Passing Inspection?
A compliant California bill of sale lets you transfer ownership cleanly after your vehicle passes its inspection.
Generate Bill of SaleSource: California Bureau of Automotive Repair (BAR). Emissions rules change periodically — verify current requirements before scheduling a test.