"Exempt" means different things depending on which exemption applies — some vehicles never need a Smog Check, while others just get a temporary pass in exchange for a fee. Here's every category.
Gasoline, hybrid, and alternative-fuel vehicles eight model years old or newer skip the biennial test at registration renewal. Instead, California charges an annual smog abatement fee — $20 for vehicles six model years old or newer, $25 for vehicles seven or eight model years old. Once a vehicle ages past that window, the normal biennial test schedule kicks in.
This is a separate, narrower exemption from the renewal one above. Vehicles four model years old or newer are exempt from needing a Smog Check specifically when ownership changes hands — the new owner pays a smog transfer fee instead. A car that's five years old, for instance, could still be exempt from testing at renewal (under the eight-year renewal rule) but require one at a change of ownership, depending on exactly how the transaction is structured.
Transfers between immediate family members — spouse, domestic partner, parent, child, sibling, grandparent, or grandchild — are exempt from the Smog Check requirement regardless of vehicle age.
Your DMV renewal notice always overrides the general rules above — if it says a test is due, get one, even if you believe your vehicle should qualify for an exemption. Fee schedules and cutoffs are set in state law and can change; this page reflects the rules as of when it was last checked against bar.ca.gov. If your vehicle isn't exempt, search for a nearby licensed station to get tested.