HVIP Eligibility, Voucher Amounts, and Small Fleet Rules

California’s Hybrid and Zero-Emission Truck and Bus Voucher Incentive Project, known as the HVIP program, cuts the purchase price of an eligible clean commercial vehicle at the point of sale by $7,500 to $240,000, with higher amounts for small fleets and public agencies. The program is run by the California Air Resources Board (CARB) and funded largely through the state’s cap-and-trade auction proceeds.¹ Vouchers are issued first-come, first-served in most cases, and the discount comes off the invoice rather than arriving later as a rebate.²

Who Qualifies for a Voucher

HVIP is open to California fleet owners and operators of every size: private businesses, public agencies, school districts, and nonprofits.³ An independent owner-operator with one truck can apply on the same footing as a logistics company running hundreds. Unlike several other California clean-vehicle programs, HVIP does not require you to scrap or retire an older diesel truck when you buy a new zero-emission one.⁴

The main condition is that the vehicle stays in California. As the purchaser, you sign an agreement to own or lease and operate the vehicle 100 percent within California for at least three years from the date the voucher is redeemed. Narrow exceptions apply to emergency response vehicles that may deploy out of state, vehicles domiciled in counties bordering Arizona, Nevada, Oregon, or Mexico, and Class 8 trucks conducting business outside California. Breaking the three-year commitment can require you to repay the full voucher amount to CARB.⁵

Which Vehicles Are Eligible

HVIP covers medium- and heavy-duty vehicles from Class 2b (8,501 pounds GVWR) through Class 8 (33,001 pounds and above). Eligible technologies include battery-electric, hydrogen fuel cell, electric power takeoff (ePTO), and other zero-emission configurations.⁶ Delivery vans, refuse haulers, drayage trucks, school buses, transit buses, and long-haul tractors are all represented. ePTO-equipped trucks use electric systems for auxiliary functions like refrigeration or lift gates instead of idling a diesel engine.

Every vehicle must appear on the HVIP Eligible Vehicle Catalog before a voucher can be requested. Confirm the specific make and model is listed before you start any paperwork.

How Much the Voucher Is Worth

Base voucher amounts scale with weight class, and qualified small fleets receive substantially more. Current amounts for zero-emission trucks are:⁷

Class 2b (8,501–10,000 lbs.): $7,500 base / $9,000 small fleet
Class 3 (10,001–14,000 lbs.): $15,000 base / $40,000 small fleet
Class 4 (14,001–16,000 lbs.): $60,000 base / $130,000 small fleet
Class 5 (16,001–19,500 lbs.): $60,000 base / $130,000 small fleet
Class 6 (19,501–26,000 lbs.): $85,000 base / $160,000 small fleet
Class 7 (26,001–33,000 lbs.): $85,000 base / $160,000 small fleet
Class 8 (33,001+ lbs.): $120,000 base / $330,000 small fleet
Class 8 fuel cell (33,001+ lbs.): $240,000 base / $420,000 small fleet

The gap between the two columns is not small. A qualifying small fleet buying a Class 8 battery-electric truck receives $330,000, nearly three times the $120,000 base amount.

School Buses and Transit Buses

Buses have their own schedule. A Class 8 zero-emission school bus qualifies for a $216,000 voucher, or $276,000 for a small public school district. Public transit agencies can receive up to $156,000 for a standard Class 8 bus, or $312,000 for a small agency. Fuel cell transit buses at Class 8 reach $312,000 standard and $552,000 for small agencies.⁷

Drayage and Refuse Trucks

Drayage trucks (port and rail yard haulers) and refuse vehicles carry higher base vouchers than standard trucks of the same weight, reflecting their heavy duty cycles. A Class 8 drayage or refuse truck starts at $150,000 base and $330,000 for small fleets. Class 8 fuel cell drayage and refuse vehicles reach $300,000 base and $420,000 for small fleets.⁷

Small Fleet Eligibility and Its Limits

To qualify for the enhanced small fleet amounts, a private company needs both 20 or fewer medium- and heavy-duty vehicles and less than $15 million in annual revenue. Government agencies and nonprofits only need to meet the vehicle count; the revenue cap does not apply to them.⁸

Two details trip people up. The fleet count is global as of January 2024: it includes every vehicle over 8,500 pounds GVWR under common ownership or control, wherever domiciled. Eighteen trucks in California plus four in Nevada is a 22-vehicle fleet, and does not qualify.⁸ There is also a lifetime cap of five vehicles per fleet at the enhanced small fleet rate. Vouchers beyond the fifth revert to the base amount.⁷

How to Apply

You do not apply to CARB directly. The process runs through an HVIP-approved dealer:

Find a participating dealer through the HVIP Dealer Catalog.⁹
Confirm the vehicle you want appears on the HVIP Eligible Vehicle Catalog.
Have the dealer submit the voucher request through HVIP’s online system on your behalf.
Sign the purchaser terms and conditions, which include the three-year California operation commitment and disclosure of any other public funding applied to the purchase.⁵
Wait for CARB to review and approve the submission.
Take delivery. The voucher is applied as a discount at the point of sale, lowering your out-of-pocket cost upfront rather than reimbursing you later.²

Most approved vouchers stay valid for up to 18 months, which gives the manufacturer time to build and deliver the vehicle. After delivery, the dealer submits final documentation to receive reimbursement from the state, so the administrative burden mostly sits with them.

Combining HVIP With Other Incentives

HVIP vouchers can be stacked with certain other funding sources, but the rules depend on your fleet size and type. Fleets of 10 or fewer vehicles can combine state-funded incentives with HVIP if the other program allows stacking, neither incentive is paying for the same incremental cost, and the non-HVIP program is not required to generate greenhouse gas emission reductions. The Carl Moyer Memorial Air Quality Standards Attainment Program and the CARB Truck Loan Assistance Program are specifically named as stackable.⁵

Public transit buses operated by or on behalf of a city, county, transportation district, or public agency can stack state-funded incentives with HVIP regardless of fleet size. In that case, HVIP covers the remaining cost up to the maximum voucher amount after other incentives are applied at their maximum allowable amounts.⁵

One federal incentive that used to complement HVIP is gone. The commercial clean vehicle tax credit under IRC Section 45W, which offered up to $40,000 for qualifying vehicles over 14,000 pounds, was terminated for vehicles acquired after September 30, 2025.¹⁰ Buyers purchasing in 2026 or later cannot claim it.

What HVIP Does Not Cover

HVIP pays for the vehicle. It does not pay for the charging or hydrogen fueling infrastructure you will need to operate it, and that is the cost that surprises fleet owners most. A Class 8 battery-electric truck is only useful if you have high-powered charging at your depot, and installing that involves electrical upgrades, permitting, and construction that can run into six figures.

California funds infrastructure separately. EnergIIZE Commercial Vehicles, administered by the California Energy Commission, provides grants for charging and hydrogen refueling infrastructure for medium- and heavy-duty zero-emission vehicles, with priority given to projects in disadvantaged communities.¹¹ The Carl Moyer Program also funds installation of infrastructure for cleaner vehicle technologies, and HVIP’s own site links to these companion programs.¹² Budget for infrastructure early. Ordering a truck through HVIP while your charging setup is still six months out is a common and costly planning mistake.

1
California Air Resources Board. Implementation Manual for the Hybrid and Zero-Emission Truck and Bus Voucher Incentive Project
2
California HVIP. Home – Clean Truck and Bus Voucher Incentive Project
3
California HVIP. FAQs – Clean Truck and Bus Voucher Incentive Project
4
California Air Resources Board. Clean Truck and Bus Vouchers (HVIP)
5
California HVIP. HVIP Terms and Conditions Form – Purchaser/Lessee
6
California HVIP. All HVIP Eligible Vehicles – Clean Truck and Bus Voucher Incentive Project
7
California HVIP. Funding – Clean Truck and Bus Voucher Incentive Project
8
California HVIP. HVIP ISEF Webinar – May 2024
9
California HVIP. Dealer Catalog – Clean Truck and Bus Voucher Incentive Project
10
Office of the Law Revision Counsel. 26 USC 45W – Credit for Qualified Commercial Clean Vehicles
11
California Energy Commission. Energy Infrastructure Incentives for Zero-Emission Commercial Vehicles
12
California HVIP. Infrastructure Planning – California HVIP