A Hawaii law taking effect in 2026 will require fuel sellers to manage carbon-intensity credits—or face interest charges on deficits.
Most Hawaii auto service owners haven't heard of SB2999, the Clean Fuel Standard bill. But if your business sells, supplies, or dispenses gasoline or diesel above a certain volume threshold set by the state, this law will directly affect how you operate starting in 2029.
Here's the provision that matters: fuel sellers will be required to generate or purchase credits to offset what the state calls "carbon-intensity deficits." If you don't retire enough credits by the end of each year, you'll automatically enter a credit clearance market and start accruing interest on what you owe.
Under SB2999, the state will set carbon-intensity standards for the fuel you sell. If your fuel mix doesn't meet that standard, you create a deficit. To clear that deficit, you must either:
• Generate credits by selling lower-carbon fuel, or
• Purchase credits from other fuel sellers who have surplus credits
Any credits you don't retire by December 31 of that year roll into the following year as an unretired deficit. At that point, you're required to participate in a credit clearance market where you can purchase credits at a capped price of $200 per credit (adjusted annually for inflation using the Consumer Price Index). On top of that, you'll owe 5% annual interest on the dollar value of unretired deficits.
This means the cost of non-compliance compounds year over year.
The law takes effect July 1, 2026. However, you have time to prepare: the state Department of Transportation must issue rules by January 1, 2028. The actual carbon-intensity standard for diesel and gasoline doesn't become effective until January 1, 2029.
That gives you roughly 2.5 years from now to understand whether your operation crosses the state's volume threshold and, if so, to develop a strategy for compliance.
Not every auto service will be subject to this requirement. The law applies only to businesses that sell, supply, or dispense fuel above the volume threshold the state will define in its rules. Smaller operators may fall below that threshold entirely. Once the Department of Transportation publishes its rules by January 1, 2028, you'll know for certain whether your business is in scope.
If you sell fuel, mark your calendar for when those state rules drop in early 2028. That's when you'll learn the specific volume threshold, the initial carbon-intensity standard, and how credits will be calculated and traded. Understanding these details early will help you budget for compliance costs and explore whether adjusting your fuel sourcing or supply chain makes financial sense.
The penalty structure—the $200 credit price cap and 5% interest on deficits—is real and automatic. It's not discretionary. Planning ahead is cheaper than scrambling after January 1, 2029.
SB2999, Section 2, §279C-___(c). For a detailed breakdown specific to your operation, contact your state trade association or the Hawaii Department of Transportation.