Federal law change
What Changes November 12, 2026
H.R. 5371, signed November 12, 2025, changes the federal definition of hemp — closing the THCA loophole used to sell high-potency hemp flower across the country. The one-year implementation window ends November 12, 2026. Here is what that means, which products are affected, and which states will feel it most.
until November 12, 2026
The legal change, explained
Two rules, one year apart — here is exactly what shifts on November 12, 2026.
Before November 12, 2026
The delta-9 standard
Under the 2018 Farm Bill, hemp is federally legal if it contains no more than 0.3% delta-9 THC by dry weight. THCA is not counted separately — only actual delta-9 THC at the time of testing matters.
This allowed hemp producers to sell flower with very high THCA concentrations (often 15–30%) because the delta-9 content stayed below 0.3%. Heating converts THCA to delta-9 THC, but the federal test did not account for that conversion.
After November 12, 2026
The total THC standard
H.R. 5371 changes the federal hemp definition to require a total THC calculation: delta-9 THC + (THCA × 0.877). The 0.877 factor is the conversion ratio from THCA to delta-9 THC during decarboxylation. The combined result must still be ≤ 0.3%.
Under this standard, a product with 25% THCA and 0.25% delta-9 THC would have a total THC of about 22.2% — over 70 times the legal limit. That product becomes marijuana under federal law, regardless of how it was tested before November 12.
Which products are affected
The November 12 change hits product categories very differently depending on their THCA concentration.
Will fail federal standard
THCA Flower
Retail THCA flower typically contains 15–30% THCA. At even 15% THCA with minimal delta-9 content, total THC calculates to ~13% — 44× the legal limit. All commercially available THCA flower will fail the post-November standard.
Will fail federal standard
Pre-Rolls & Blunts
Pre-rolls use the same flower, so the same THCA concentrations apply. There is no processing that reduces THCA content before rolling. All commercially available THCA pre-rolls will fail the total THC standard.
Will fail federal standard
THCA Concentrates & Diamonds
THCA concentrates typically contain 90–99% THCA — orders of magnitude above the 0.3% total THC limit. These are the most affected product category by a wide margin.
Likely affected
THCA Vape Cartridges
Vape cartridges with high-THCA distillate (often 80–95% THCA) will fail the total THC standard. Some formulations with very low cannabinoid concentrations may qualify, but most current THCA vape products will not.
Depends on formulation
Edibles & Gummies
Edibles with very low per-serving THC content may still qualify if total THC stays below 0.3% by weight. Products marketed as "THCA gummies" with meaningful potency will likely need reformulation to remain in the hemp category.
Generally unaffected
CBD & Low-Dose Hemp Products
CBD isolate products with no detectable THCA or delta-9 THC are unaffected by this change. Low-dose hemp beverages and wellness products designed to stay well below potency thresholds will likely remain compliant.
State-by-state impact
The federal change matters most in states that currently rely on the federal hemp standard — places where high-THCA products are sold legally today but have no licensed cannabis program to absorb them after November 12.
Highest federal impact
States relying on the hemp loophole
These states currently appear to allow hemp-derived THCA under the federal delta-9 standard with no additional state restrictions. The November 12 change removes the legal basis for THCA flower in each of them — and none has a licensed adult-use cannabis market as an alternative channel.
Elevated risk
States already in a legal gray zone
These states have unsettled or contested THCA rules today. The federal change tightens the landscape further and may accelerate state-level legislative action.
Many states — including Texas, Tennessee, California, Ohio, and others — have already enacted total THC testing or moved THCA to dispensary-only. For residents of those states, November 12 aligns with restrictions that already apply at the state level. See the full 50-state guide →
What to do before November 12, 2026
Steps consumers and retailers can take to understand how this change affects them.
Many states have already restricted THCA regardless of the federal change. Knowing where your state stands now tells you whether November 12 changes anything locally.
State legality guide →If your state has adult-use cannabis dispensaries, high-THCA products may still be available through those channels after November 12 — just not through hemp retail or online ordering from out-of-state vendors.
H.R. 5371 gave the USDA a one-year window to issue rules. The specifics of how the total THC standard is enforced may shift based on USDA rule-making before November 12, 2026 — monitor official USDA and FDACS communications.
Interstate shipping of THCA products relies on the current federal hemp exemption. That exemption ends November 12, 2026 for products that fail the total THC standard. Online orders placed close to the deadline may arrive after the law has changed.
Related guides
Frequently asked questions
What is H.R. 5371 and what does it change?
H.R. 5371 is federal legislation signed November 12, 2025 that changes how hemp is defined under federal law. Currently, hemp must contain no more than 0.3% delta-9 THC by dry weight. After November 12, 2026, hemp compliance will be based on "total THC" — a formula that adds delta-9 THC to THCA multiplied by 0.877. Because THCA converts to delta-9 THC when heated, this change effectively closes the hemp THCA loophole. Most commercially sold THCA flower, which typically contains 15–30% THCA, will no longer qualify as hemp under federal law.
Will THCA be completely banned after November 12, 2026?
Not everywhere and not necessarily for all products. THCA itself is not banned — it will simply no longer qualify as "hemp" under the federal definition if total THC (delta-9 + THCA × 0.877) exceeds 0.3%. States with licensed adult-use cannabis markets will still be able to sell high-THCA products through those licensed channels. What changes is the federal hemp exemption that currently allows THCA flower to be sold across state lines in non-cannabis states. Hemp-derived THCA products with very low total THC may still qualify.
Which THCA products will be most affected?
THCA flower and pre-rolls are the most affected product type because they typically contain 15–30% THCA, giving them a total THC equivalent of 13–26%. That is far above the 0.3% limit. THCA vape cartridges and concentrates are similarly affected. Edibles and tinctures with lower THCA concentrations may still qualify if formulated to keep total THC below 0.3%, but this will require significant reformulation from most current products.
What about states that already have their own restrictions?
Many states — including Texas, Tennessee, California, Colorado, and others — have already moved to apply total THC testing or restrict THCA products through state law. For residents of those states, the November 12 federal change may have limited immediate practical impact because state restrictions already apply. However, the federal change will affect interstate commerce and online ordering of THCA products regardless of your state's rules.
Can I still buy THCA products before November 12, 2026?
Hemp-derived THCA products that currently comply with federal and state law may still be legally purchased before the November 12, 2026 deadline. However, you should verify your state's current regulations, as many states have enacted their own restrictions that already apply. The November 12 deadline affects the federal standard — state laws are separate and vary considerably. Always check current rules with official sources or an attorney before purchasing.
How does the total THC formula work?
The total THC formula is: Total THC = delta-9 THC + (THCA × 0.877). The 0.877 factor represents the conversion ratio of THCA to delta-9 THC during decarboxylation (heating). For example, a THCA flower product testing at 25% THCA and 0.1% delta-9 THC would have a total THC of: 0.1% + (25% × 0.877) = 22.0%. That is nearly 73 times over the 0.3% legal limit. Under the new standard, this product would be classified as marijuana at the federal level.
Will online THCA retailers be able to ship after November 12, 2026?
After November 12, 2026, shipping high-THCA products across state lines will no longer be federally protected under hemp law. Products that fail the total THC standard will be treated as marijuana for federal shipping purposes, which means they would be subject to federal controlled substances law. Licensed cannabis businesses in adult-use states may still be able to sell THCA products locally, but the interstate mail-order market that currently exists for hemp THCA products will face significant legal risk after that date.
What should I do to prepare?
If you use THCA products regularly, the most important steps before November 12, 2026 are: verify whether your state has a licensed adult-use cannabis program where THCA will remain available; understand your state's current legal status for THCA; consult official state resources or an attorney if you have specific legal questions; and monitor news coverage of USDA rule-making under H.R. 5371, as implementation details may affect how the deadline applies in practice.