Investing in a Thai Cannabis Dispensary or Growshop: Supply, Risks, Break-Even and Scenario Models (Part 2 of 2)

GOOD_BUDS · November 4, 2026, 4:46am

In 2025, 8,636 Thai cannabis shop licences came up for renewal and only 1,339 (15.5%) were renewed. 7,297 shops closed, which left 11,136 still operating. The figures are Ministry of Public Health data reported by The Nation, a Bangkok newspaper, on 1 February 2026. The main cause was a set of rules in force since 26 June 2025. Flower may be sold only against a prescription, it must come from a certified farm, and it may not be advertised or sold online. Shops also need a traditional medicine practitioner on site. This part explains what those rules mean for supply, names the specific risks and shows how to calculate break-even and build scenarios.

The prescription is the PT 33 (ภ.ท. 33), which covers at most 30 days (PT 33 explainer). The farm certificate is GACP (Good Agricultural and Collection Practice), a growing standard built on written records, testing and tracing. The draft Cannabis Control Act, approved by the Cabinet on 22 September 2026, is still a draft and not law.

This is Part 2. Part 1: Investing in a Thai Growshop or Dispensary: The Cost Structure, and What the 2025–26 Shakeout Actually Showed

4. Supply: flower must come from a certified farm

Medical rules move paperwork back along the chain to the farm. Flower that is sold or exported must come from a GACP-certified farm. That means written growing records, batch records, testing, and tracing each product from plant to package.

This has two consequences for an investment.

Owning both the farm and the shop makes more sense now. Owning several steps of the supply chain is called vertical integration. It mattered less when shops sold mostly to walk-in recreational buyers. Now, meeting the rules is what limits the business. So control over a supply of flower that meets the rules is worth more.

Supplying flower may be a better position than running a shop, but that is not proven. A shop carries rent, the practitioner’s salary, the risk that too few customers come in, and renewal risk. A farm avoids the walk-in risk and the shop’s practitioner requirement. It still carries land and building costs, plus the risk of losing its licence or GACP certificate at renewal. No comparable figures on farm closures have been published. The 2025 figures describe shops only, so they do not show that farming is safer.

Translator’s note: if you buy flower from another farm, ask for two documents every time. The first is a copy of the farm’s current GACP certificate. The second is the lab certificate (certificate of analysis) for that batch. See how to read a certificate of analysis. Check that the batch number on the certificate matches the package. The rules require certified origin, and these papers are your proof of it.

What to do: before you sign a supply contract, write down where every batch will come from and which documents arrive with it. If you plan to grow your own, price GACP record-keeping and audits as a fixed monthly cost in your model.

5. Risks, one by one

Rule changes. This risk comes first because the record is clear:

9 June 2022: cannabis removed from the narcotics list.
November 2022: flower designated a controlled herb (Ministry of Public Health notification B.E. 2565, signed 11 November 2022). B.E. is the Thai Buddhist Era year; subtract 543 for the Western year.
26 June 2025: replaced by the B.E. 2568 notification. Flower became prescription-only on PT 33, with no online sales and no advertising.
26 April 2026: the Ministerial Regulation on Cannabis or Hemp Extracts B.E. 2569 tightened licensing. See the two B.E. 2569 regulations.
30 April 2026: the Ministerial Regulation on Controlled Herbs (No. 2) B.E. 2569 tightened the licence criteria for flower further.

That is three formal rule changes in the ten months from June 2025 to April 2026. More measures followed in 2026: the June crackdown on blank PT 33 prescriptions and the July food advertising criteria. The draft Act is still pending (draft Act tracker). Plan for more changes.

Licence renewal. The renewal rate was 15.5%. Whatever the reasons, renewal is where shops actually failed.

Translator’s note: these are the penalties a licence holder faces under the Thai Traditional Medicine Protection Act B.E. 2542 (1999). Use them as inputs for your scenarios. More detail is in the article on suspension and revocation.

Suspension: up to 90 days per order (Section 52).
Trading while suspended: up to 1 year in prison and/or a fine of up to 20,000 baht (Sections 52 paragraph 2 and 78). The same penalty applies to selling or processing a controlled herb without a licence (Sections 46 and 78). Ask your licensing office or a Thai lawyer, well before your licence expires, whether you may keep selling while a renewal is still pending.
Revocation: the holder cannot get a new licence under the Act for two years. After that, a new licence is at the licensing authority’s discretion (Section 54).
Who the ban covers: the two-year ban applies to the company and also to its directors, managers and other responsible persons. This is Clause 8(1)(e) of the Ministerial Regulation on licensing for research, export, sale and processing of controlled herbs, B.E. 2559 (2016). The same people cannot simply set up a new company and apply again.
Appeal: within 30 days of being notified, to the Committee for the Protection and Promotion of Thai Traditional Medicine Knowledge (Section 70). An appeal does not stop the order. The Committee’s decision is final (Section 71).

Practitioner availability. The practitioner is a hard requirement, and only the labour market can supply one. If there are too few practitioners, salaries rise and small shops get squeezed.

Advertising. All advertising of flower is banned, not only online advertising. The July 2026 food advertising criteria also apply to cannabis food products. A shop that cannot advertise depends on its location, word of mouth and returning customers. That changes the marketing budget. It also makes a good location worth more, which raises the value of the lease. See the advertising and selling rules.

Banks and payments. It is uncertain whether banks will serve cannabis businesses. Before you commit, ask your bank in writing whether it will open and keep an account for this business.

Foreign ownership. Since 26 April 2026, licences for cannabis or hemp extracts above 0.2% THC go only to three kinds of holder:

Thai juristic persons (legal entities such as companies) that are not “foreign” under the Foreign Business Act B.E. 2542 (1999);
state agencies;
the Thai Red Cross Society.

The sources checked for this article do not show whether the flower licence rules set nationality or ownership conditions. If you are a foreign investor, have a Thai lawyer check your planned structure before you do anything else.

Too many shops. 11,136 shops remain. Where you open matters more than how good the business plan looks.

What to do: in your spreadsheet, link each risk above to one of the three scenarios in section 6. Then write down the cost or loss of income each risk would cause.

6. How to build the model: break-even and three scenarios

Work through these steps in order:

Confirm the current legal position first with a Thai lawyer, for your specific activity and ownership structure. If this step fails, all the other work is wasted.
Confirm the practitioner requirement for your planned opening hours. Price the recruitment before you sign a lease.
Get three real quotes for every setup line. Fill in the cost tables from Part 1, section 3 with suppliers’ numbers, not numbers from an article.
Model three scenarios, not one: a base case, a case where the rules tighten again (the draft Act is pending), and a case where you cannot renew.
Calculate the break-even monthly revenue. From it, work out how many customers you need and how much each must spend. Then judge whether the location can deliver that.
Model the exit. Work out what you could recover if the business fails.

Working out break-even for a shop

Break-even is the level of sales where income exactly covers costs, with no profit and no loss.

Fixed costs per month. Add up every monthly cost that does not change with sales: rent, practitioner salary, other staff, compliance, utilities, insurance and bank charges. Add one-twelfth of the yearly licence renewal cost.
Gross margin. This is the share of each sale left after paying for the stock. Formula: (selling price − purchase cost) ÷ selling price. Include testing costs in the purchase cost if you pay them per batch.
Break-even revenue per month = fixed costs ÷ gross margin.
Customers needed per month = break-even revenue ÷ average spend per customer.
Customers needed per day = customers per month ÷ opening days per month.

A small change in margin moves break-even a lot, because you divide by the margin. Every customer needs a valid PT 33 prescription. So compare the daily number with what licensed shops nearby actually see, and ask other shop owners in the community.

Working out break-even for a farm

Fixed costs per harvest: land or rent, buildings, staff, power, GACP records and audits, and the licence and GACP renewal share for that period.
Margin per kilogram: selling price per kg minus the variable cost per kg (inputs, testing, packaging).
Break-even kilograms per harvest = fixed costs per harvest ÷ margin per kilogram.

Compare that weight with what your space has actually produced, not with a seed catalogue’s yield claim.

Three scenarios

Scenario	What you change in the spreadsheet	What it tells you
Base case	Your quoted costs and a realistic sales figure	Whether the business works if nothing changes
Rules tighten again	Add costs a new rule could bring, such as extra staff hours or age checks if the reported under-20 ban becomes law. Lower expected sales	Whether you have enough margin to absorb another change
Cannot renew or suspended	Set sales to zero for at least 90 days (one suspension order) while fixed costs continue. Add a second version for revocation: a two-year ban, so the exit costs apply	How much working capital you need: fixed costs × months without sales. It also shows your loss if you have to close

A farm uses the same three scenarios. In the third, a delayed licence or GACP renewal means no sales while costs continue.

Return-on-investment figures

Return on investment (ROI) is profit expressed as a share of the money put in. This article publishes no ROI figures. Treat any that you are shown with caution. A forecast that does not state which rules it assumes cannot be checked. Ask anyone who shows you an ROI figure two questions: which rules did they assume, and what happens to the figure in the cannot-renew scenario.

What to do: do not sign a lease until you have run all three scenarios. Do not sign until you have the cash to survive at least the cannot-renew case.

7. Where the opportunity may be

Three observations follow from the data, not from optimism.

Compliance services. Thousands of shops and farms need practitioner staffing, records systems, help with licence renewal and audit preparation. The rule change created that demand directly. Check whether this kind of service needs a licence of its own.

Supplying flower that meets the rules. About 84.5% of shop licences up for renewal in 2025 were not renewed, about 40% of all shops. No comparable figure has been published for farms. Medical rules make documented production worth more. The risks in section 4 still apply.

Growshops and growing supplies. This means selling equipment and growing inputs rather than flower. It serves both licensed cannabis farms and the wider horticulture market. It does not come under the cannabis shop licensing rules in the same way. Still, check this for your specific product range. Inputs sold specifically for growing cannabis may have their own rules.

Translator’s note: fertilisers in Thailand fall under the Fertilizer Act B.E. 2518 (1975), amended by the Fertilizer Act (No. 2) B.E. 2550 (2007). Before you stock a fertiliser, check that it is legally registered. How to check a fertiliser’s registration explains the steps. Pesticides may be sold and used only if they are registered with the Department of Agriculture (กรมวิชาการเกษตร), and only as the label says. See what you may legally spray under Thai GACP. Checking registration first keeps unregistered products off your shelves.

What to do: if you are weighing these three options, make a fixed-cost list and run a break-even calculation for each. Do this before you choose.

A question for readers who went through the 2025 renewals

The reported cause of the closures is the practitioner requirement. But “could not find a practitioner”, “could not afford one”, “decided it was not worth it” and “could not meet the premises rules” are four different failures. Each one teaches something different to anyone planning to open now. No published dataset records which it was. If you went through the 2025 renewals, please reply below this topic. Say which failure stopped your shop, or how you got through. That helps the next person build a realistic model.

This article is general business and market information. It is not investment, financial, legal or tax advice. The rules have changed several times and may have changed again since publication. Check the current position with a qualified Thai lawyer before you commit money. The closure figures are Ministry of Public Health data as reported by The Nation on 1 February 2026. This article deliberately publishes no cost or ROI estimates that could not be verified.

References

The Nation (Bangkok), “Over 7,000 cannabis shops close due to stricter regulations and new law”, 1 February 2026, reporting Ministry of Public Health data as at 28 December 2025. Over 7,000 cannabis shops close due to stricter regulations and new law
Notification of the Ministry of Public Health Re: Controlled Herbs (Cannabis) B.E. 2568 (2025), in force 26 June 2025.
Ministerial Regulation on Cannabis or Hemp Extracts B.E. 2569 (2026), in force 26 April 2026; Ministerial Regulation on Controlled Herbs (No. 2) B.E. 2569 (2026), in force 30 April 2026.
Thai Traditional Medicine Protection Act B.E. 2542 (1999), Sections 46, 52, 54, 70, 71 and 78.
Ministerial Regulation on licensing for research, export, sale and processing of controlled herbs, B.E. 2559 (2016), Royal Gazette vol. 133 part 103 Kor, 9 December 2016, Clause 8(1)(e).

Further reading on Asiannabis