Connecticut Ends THC-Based Taxes and 70% Concentrate Cap Thursday

Tax Structure Overhaul Takes Effect October 1

Connecticut will replace its milligram-based THC tax with a weight-based excise tax starting Thursday. The current system taxes based on total THC content measured in milligrams, which creates compliance burdens for cultivators and retailers who must test and report potency for every SKU. The new weight-based model taxes flower, concentrates, and edibles by gram or unit weight. It aligns Connecticut with most adult-use states.

The Department of Consumer Protection hasn't published final per-gram rates, but industry sources expect flower to be taxed at approximately $0.625 per gram and concentrates at $1.25 per gram. The shift is budget-neutral by design—projected to generate the same $50 million in annual cannabis excise revenue the state collected in fiscal 2026.

70% THC Concentrate Cap Removed

The state will lift its 70% THC potency limit on concentrates, opening the door to full-spectrum extracts and high-potency products. Connecticut imposed the cap in 2023 as a harm-reduction measure. Operators argued it forced them to dilute concentrates with cutting agents or forgo product categories entirely. The cap applied only to adult-use sales; medical patients faced no potency restrictions.

Removing the cap allows dispensaries to stock live resin, rosin, and distillate products above 70% THC. Competitive pressure drove this change—Massachusetts, Rhode Island, and New York impose no concentrate caps, and Connecticut retailers reported losing cross-border traffic to higher-potency inventory in neighboring states.

Compliance Timeline and Retailer Readiness

Dispensaries have 30 days from October 1 to update point-of-sale systems and inventory reporting protocols. The Department of Consumer Protection issued technical guidance on September 15, giving operators two weeks to reprogram tax calculations and train staff. Retailers must continue reporting sales under the old THC-based system through midnight September 30. At 12:01 a.m. October 1, they switch to weight-based reporting.

The state's seed-to-sale tracking platform, Metrc, will be updated overnight on September 30 to accommodate the new tax fields. Cultivators and processors aren't required to retest existing inventory. The tax applies at the point of retail sale based on product weight as recorded in Metrc.

Revenue Implications and Budget Neutrality

Connecticut's cannabis excise revenue totaled $51.2 million in fiscal 2026, and the state projects the new tax structure will generate $50-52 million in fiscal 2027. Per-gram rates were calibrated to match historical collections. Industry analysts expect the concentrate cap removal to drive incremental sales growth, though—high-potency products command premium pricing and attract experienced consumers who currently shop out of state.

The state allocates 25% of cannabis excise revenue to the Social Equity Council, which funds equity applicant grants and technical assistance. Another 25% flows to municipal host communities. The remainder enters the general fund.

Social Equity and Market Access

The tax simplification is expected to reduce compliance costs for equity licensees, who've struggled with the testing and reporting burden of THC-based taxation. Social equity applicants in Connecticut face lower capital reserves than traditional operators. The per-milligram tax required costly potency testing for every batch. Weight-based taxation eliminates that step, reducing lab costs by an estimated $1,200 per month for a mid-volume retailer.

Connecticut has issued 38 social equity retail licenses as of September 2026, but only 14 have opened for business. The Social Equity Council cited compliance complexity and capital constraints as the primary barriers to launch.

What Comes Next

The Department of Consumer Protection will publish final per-gram tax rates by September 30. Operators are watching for guidance on how the tax applies to multi-ingredient products like infused pre-rolls, which contain both flower and concentrate. The next major regulatory milestone is the state's planned expansion of delivery licenses in Q1 2027.

For full background on Connecticut's regulatory framework, see the CannIntel topic hub on the Connecticut Cannabis Program.