Last verified: March 2026
Hawaii's Cannabis Tax: Remarkably Simple
Hawaii imposes no special cannabis excise tax. Medical cannabis is taxed only at the standard General Excise Tax (GET) rate of 4%, with an additional county surcharge of up to 0.5% in most counties. This makes Hawaii's medical cannabis among the least taxed in the nation.
Current Tax Structure
| Tax Component | Rate |
|---|---|
| General Excise Tax (GET) | 4.0% |
| County surcharge (Honolulu, Hawaii County, Kauai) | +0.5% |
| County surcharge (Maui) | None |
| Effective rate (most counties) | 4.5% |
| Effective rate (Maui) | 4.0% |
| Special cannabis excise tax | None |
How GET Applies to Cannabis
The General Excise Tax is Hawaii's version of a sales tax, but it's levied on the business rather than the consumer. Dispensaries are responsible for remitting GET monthly via Form G-45. In practice, dispensaries pass the cost through to patients in their pricing.
County Surcharge Rates
| County | Surcharge | Effective Rate |
|---|---|---|
| Honolulu (Oahu) | +0.5% | 4.5% |
| Hawaii County (Big Island) | +0.5% | 4.5% |
| Kauai County | +0.5% | 4.5% |
| Maui County | None | 4.0% |
Maui County is the only county without the additional surcharge, making it the lowest-tax jurisdiction for cannabis purchases in Hawaii.
Act 230: State Tax Deductions for Cannabis Businesses
In 2016, Hawaii passed Act 230, which decoupled Hawaii state tax law from federal IRC §280E. Under federal law, cannabis businesses cannot deduct ordinary business expenses on their federal tax returns because cannabis remains a Schedule I substance. Act 230 allows Hawaii dispensaries to deduct standard business expenses on their state tax returns, significantly reducing their state tax burden compared to dispensaries in states that conform to §280E.
This was a meaningful and forward-thinking policy. Most states still conform to §280E, meaning their cannabis businesses pay far higher effective state tax rates.
Revenue History
Cannabis tax revenue has grown steadily since the first dispensary sale in August 2017, reflecting the expansion of dispensary locations and patient enrollment:
| Year | GET Revenue | Notes |
|---|---|---|
| 2017 | $99,871 | First dispensary sale in August; partial year |
| 2018 | — | Additional dispensaries open; visitor cards introduced |
| 2019 | — | Market continues to mature |
| 2020 | — | COVID-19 impacts; dispensaries deemed essential |
| 2021–2023 | — | Steady growth as more locations open |
| 2024 | $2.94 million | Highest single year on record |
| Total (2017–2024) | ~$14.4 million | Cumulative GET revenue from cannabis sales |
The growth from $99,871 in the first partial year to $2.94 million in 2024 reflects both market expansion and increasing patient enrollment, which now exceeds 30,000 registered patients.
Proposed Recreational Tax Framework
Legalization bills (HB 1246/SB 1613 in 2025) proposed a significantly different tax structure for adult-use cannabis:
| Market | Excise Tax | GET | Total (before county) |
|---|---|---|---|
| Medical (current) | 0% | 4% | 4% |
| Adult-Use (proposed) | 14% | 4% | 18% |
Under this framework, medical cannabis would remain at the current 4% GET, preserving the low-tax benefit for patients. Adult-use cannabis would carry a 14% excise tax on top of the 4% GET, bringing the base rate to 18% (plus county surcharge). This is competitive with other legal states — lower than Washington (37%) and California (effective ~33%) but higher than Oregon (17%).
Economic Projections If Legalization Passes
Multiple studies have projected the economic impact of recreational legalization in Hawaii:
- Monthly sales: $46–90 million by year 5 (January 2026 state report)
- Annual tax revenue: $82 million (HICIA estimate)
- Jobs created: 3,375 (HICIA estimate)
For context, the current medical-only market generates roughly $2.94 million in annual GET revenue. A regulated recreational market would represent a 25–30x increase in cannabis tax revenue — money that currently flows to the black market.
Hawaii's 4% GET rate makes it one of the cheapest states for medical cannabis taxation. If adult-use legalization passes with the proposed 14% excise tax, maintaining your 329 card would save you significant money on every purchase — a strong incentive to stay in the medical program.
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