SLO County Walks Back an 8% Cannabis Tax to 6%

San Luis Obispo County supervisors voted on August 4, 2026, to cut the unincorporated cannabis business tax from 8% to 6%. The lower rate applies to sales on and after October 1, 2026.

The hike was not a new policy. It fired on July 1 because the board did not vote in time, and operators still remit 8% through September 30.

The Tax Hit 8% After Supervisors Missed July

Voters created this tax in Measure B-18. Unless the Board of Supervisors holds or cuts it, the rate rises 2 points each July 1, up to 10%. The auditor-controller’s office said the rate was not modified before the fiscal year started, so licensed operators outside city limits had to tax at an 8% rate beginning July 1, 2026.

The notice went out on July 17, more than two weeks after the new rate was already in force. July collections were due August 31. By then the board had a hearing on the calendar, but the books for the first month of the fiscal year were already closed at 8%.

THE 2026 RATE WHIPSAW

1. July 1, 2026: The cannabis business tax rises on its own to 8% of gross receipts.
2. July 17, 2026: The tax collector tells operators the 8% rate is in force and that the board may still act.
3. August 4, 2026: Supervisors adopt an ordinance that puts the rate back at 6%.
4. October 1, 2026: The 6% rate first applies to transactions that day and after.

July, August, and September stay at 8%. That is the price of a late vote: the cut is real, and it is also three months behind the spike.

Terp Canyon’s Owner Wants a Full Rewrite

Growers who spoke on August 4 did not treat 6% as a win. Justin Carlson, co-owner of Terp Canyon in Cayucos, told supervisors the yearly wait on the rate makes hiring and long bets harder. He said licensed farms are not asking for a gift. They want a chance to price against shops and growers who pay no local tax at all.

Even at 6%, San Luis Obispo County remains one of the highest-tax cannabis jurisdictions in California. Licensed cannabis businesses are already competing against illicit market that pays no taxes, follows no regulations and has significantly lower operating costs.

Justin Carlson, co-owner of Terp Canyon, August 4, 2026, Board of Supervisors meeting

Carlson asked the board to go further and rewrite the county cannabis ordinance, not only park the rate. SLO Cal Roots founder Austen Connella focused on the three months still stuck at 8%. He said operators are already working with thin margins after state excise swings, testing, packaging, and insurance, and that there is not a lot of room left.

That complaint is older than this summer. In June 2024, when supervisors froze the same tax at 6% for the next fiscal year, Shawn Bean, owner of The Source, said a lower rate let him hire, sell, and put money back into the company. The 2026 hearing sounded less like expansion and more like keeping the lights on.

The County Must Plug a $200,000 Gap

The board’s vote was unanimous. The budget math is not. A staff report put the general-fund loss from skipping the 2% step at around $200,000 for this fiscal year.

THE 2026 MONEY

• Restored rate: 6% of gross receipts for unincorporated cannabis businesses, starting October 1, 2026.
• Bridge rate: 8% on every taxable transaction in July, August, and September 2026.
• Budget hole: around $200,000 the county will not take from the 2% step that had been slated for fiscal year 2026-27.
• Ceiling still on the books: 10%, the top of Measure B-18’s ladder.

Supervisor Heather Moreno voted for 6% and still called the timing a problem. She said the shortfall should have been handled when the 2026-27 budget was built, not after the fiscal year had started.

“Now we have to take that money out of the budget and figure out a way to fill that gap, and this is problematic,” Moreno said. She added that she understands the hit on the industry and did not know why the file landed this late.

In June 2024 the same office estimated that holding the rate would keep approximately $250,000 out of the general fund for that year. Two different fiscal years, two different holes, same 2 points.

Measure B-18 Still Climbs Toward 10%

On June 5, 2018, county voters approved Measure B-18, a gross-receipts tax on cannabis businesses in the unincorporated area. It followed Proposition 64 legalized adult-use cannabis as of January 1, 2018. The local tax started July 1, 2018, at 4%. The 2% annual step began July 1, 2020, and stops at 10% unless supervisors delay or reduce it.

Gross receipts means almost all cannabis revenue. Costs do not come off the top. Sales tax and receipts already taxed in another city or county may be deducted. Testing labs are exempt. Nurseries, farms, distributors, manufacturers, retailers, and microbusinesses are not. A firm based in a city still owes the county tax on deliveries into the unincorporated area.

Returns are monthly. Payment is due by the last day of the following month. Miss that date and the bill takes a 25% penalty. Stay late more than a month and another 25% is added, up to 50%, plus 1.5% interest for each month overdue. That structure is why a rate that sits at 8% for a quarter is not a rounding error. It is the base the penalties stack on.

THE RATE SINCE MEASURE B-18

The tax collector’s own program page still listed 6% as the fiscal year 2025-26 rate. That was accurate through June 30, 2026. It was not a promise the ladder would stay off.

The 2022 Jump Lasted About a Year

This is the second time 8% did not stick. The rate rose to 8% on July 1, 2022, then supervisors put it back to 6% the following year. It sat there through the June 24, 2024 freeze for fiscal year 2024-25 and through fiscal year 2025-26.

Justin Cooley, then deputy director in the auditor-controller-treasurer-tax collector’s office, explained that 2024 hold in plain terms. The industry had been slower to take root than expected, he said, and holding the rate was meant to give operators a little more time.

They got two more fiscal years at 6%. Then July 1, 2026, arrived without a vote, and the ladder moved anyway. The “time” never changed the ordinance. It only changed whether anyone remembered to act before the fiscal year started.

Seven cities inside the county set their own cannabis rules and taxes. The county levy does not reach those storefronts, except on deliveries into the unincorporated area. Operators who live in both systems still file the county return on the county share.

Humboldt and Mendocino Went Further

SLO’s 2-point walk-back sits inside a wider local retreat. Humboldt County supervisors ended the Measure S cultivation tax for 2026 after years of rate cuts. Staff there put outstanding balances at about $11.45 million and said the tax brought in $575,000 in 2024. Mendocino cut cultivator and nursery bills by 40% for tax year 2025 and 35% for 2026, then moved toward a 2.5% gross-sales model and wrote off old debts.

OTHER LOCAL TAX RETREATS

• Humboldt: Measure S cultivation tax set to zero for 2026, with about $11.45 million still on the books from earlier years.
• Mendocino: 40% off cultivator and nursery tax in 2025 and 35% off in 2026, with a later shift toward 2.5% of gross sales.
• The state excise: rose to 19% on July 1, 2025, then Gov. Gavin Newsom signed a rollback to 15% through 2028.

The Legislative Analyst’s Office, in its 2026 Q2 note, said $152 million in cannabis tax was due on returns for that quarter and now projects cannabis tax revenues of $630 million in 2025-26 and $650 million in 2026-27. Those are statewide figures, not SLO’s. They show why counties keep touching rates: the legal pool is not growing fast enough to fund the taxes written in 2016 and 2018.

The California Department of Tax and Fee Administration publishes taxable cannabis sales by county each quarter. SLO’s local fight is a gross-receipts ordinance, not that sales-tax table, but both track the same soft legal market.

Operators Collect 8% Through September 30

The August 4 ordinance is the live rule, with a delay built in. The tax collector was blunt: the rate does not change until October 1, 2026, and shops and farms must keep collecting 8% through September 30.

WHICH RATE APPLIES WHEN

• July, August, September 2026: 8% on unincorporated cannabis gross receipts; September’s return is due by October 31, 2026.
• October 1, 2026, and after: 6% on those same receipts, under the ordinance reducing the rate to 6%.
• City storefronts: follow city taxes, except deliveries into the unincorporated area, which still owe the county levy.
• Next July 1: Measure B-18’s 2% step can fire again, up to 10%, unless the board votes first.

Licensed operators will finish September at 8% and open October at 6%. The 10% cap never left the ordinance. If supervisors miss another July, the ladder will move without them.