Is THCA Legal in Montana?
Montana bars consumer sale of hemp products containing total THC. The controlling authority is MCA 80-18-101 and MCA 50-31-239 (SB 375), effective May 5, 2025, and the measurement standard Montana applies is total delta-9 THC, defined to include THCA.
That standard decides everything. Where a state measures total THC, delta-9 plus 87.7% of the THCA content, high-THCA material fails on the same lab result that passes federally. Run any Certificate of Analysis through the total THC calculator to see both numbers.
What Happened in Montana
SB 375 prohibits consumer sale of any hemp product containing total THC absent FDA authorization as a food or drug — a standard no hemp THC product currently meets. HB 49 adds 0.5 mg per serving and 2 mg per package caps.
What This Means for Buyers in Montana
Effectively nothing intoxicating outside the licensed cannabis channel.
Montana THCA Questions
Why is THCA not permitted in Montana?
Because Montana measures total delta-9 THC, defined to include THCA rather than delta-9 alone, under MCA 80-18-101 and MCA 50-31-239 (SB 375), effective May 5, 2025. High-THCA material fails that test by definition.
Is any hemp product still legal in Montana?
Effectively nothing intoxicating outside the licensed cannabis channel.
Does federal legality override this?
No. Federal law is a floor, not a ceiling — appellate courts have repeatedly upheld stricter state standards.
Federal law changes on November 12, 2026 — see what changes and the bill tracker. Compare any state with the legal status checker, and verify any product with the COA reader.
Reviewed August 5, 2026. General information, not legal advice. Verify against current statute and consult a licensed attorney. Adults 21+.