Smog Check Cost Calculator

A smog check is a mandatory emissions inspection required in many U.S. states to ensure your vehicle isn't polluting excessively — and the cost varies by state, vehicle type, and whether it's your first test or a retest. Enter your vehicle year, vehicle type, and state, then indicate if a retest is required to get your Total Smog Check Cost. Secondary outputs include the test fee, certificate fee, and your vehicle's emissions category.

Enter your vehicle's model year

Retest Required? *

Results

Total Smog Check Cost

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Test Fee

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Certificate Fee

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Vehicle Category

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Frequently Asked Questions

How much does a smog check cost?

Smog check costs vary by vehicle age and type. Most vehicles 2000 and newer cost around $74, while older vehicles (1995 and earlier) cost around $108. Motor homes are typically the most expensive at around $168.

What's included in the smog check fee?

The total cost includes the emissions test fee and a state certificate fee (typically $8.25). Some locations may charge additional fees for paperwork or administrative costs.

Do I get a free retest if my vehicle fails?

Most smog check stations offer one free retest within 90 days if your vehicle fails the initial test. However, you'll need to fix any emissions issues before the retest.

Why do older vehicles cost more for smog checks?

Older vehicles require more comprehensive testing procedures and take longer to test. Vehicles from 1995 and earlier need additional tests that newer vehicles with OBD-II systems don't require.

Which states require smog checks?

Not all states require emissions testing. California, Arizona, Colorado, Connecticut, and several other states have mandatory smog check programs, typically in urban areas with air quality concerns.

How often do I need a smog check?

Most states require smog checks every 2 years for vehicle registration renewal. New vehicles are typically exempt for the first few years, and the specific requirements vary by state.

What makes motor homes more expensive to test?

Motor homes cost more because they're larger, heavier vehicles that require specialized testing equipment and procedures. The test takes longer and requires more resources than standard passenger vehicles.

Can I get my smog check done anywhere?

You can get your smog check done at any licensed testing station in your state. Some areas have both test-only and test-and-repair facilities, with different regulations for each type.