Sun-Grown vs. Indoor Weed: How Colorado's New Tax Bill Changes the Math

The Bottom Line

Colorado charges a 15% excise tax when marijuana moves from the farm to the store, and right now, the state lumps a lot of wholesale weed together to calculate that tax. This bill forces the state to create separate, cheaper tax brackets for marijuana grown outdoors. It’s a significant shift for vertically integrated growers who have been paying taxes based on artificially high, indoor-inflated market rates.

What This Bill Actually Does

To understand this bill, you have to look at how Colorado taxes marijuana. When a cultivation facility sells unprocessed weed to an independent manufacturer or dispensary, the state hits that transaction with a 15% excise tax based on the actual sale price. But what happens when a farm and a retail store are owned by the exact same company? Because they aren't actually "selling" the weed to themselves, there's no sale price to tax. Instead, the Department of Revenue calculates an Average Market Rate (AMR) for wholesale marijuana and taxes the inter-company transfer based on that state-determined value.

Here is where the problem starts: growing marijuana in a high-tech indoor facility is incredibly expensive, and the resulting flower sells for a premium. Growing marijuana outdoors under the sun is much cheaper, and the crop typically commands a lower wholesale price. Under the current rules, the state calculates an AMR that often blends different cultivation methods. That means outdoor farmers transferring their own product end up paying an excise tax on a value that's artificially inflated by the price of indoor weed. They are taxed on money the crop isn't actually worth.

HB26-1077 fixes this by legally separating the two. The bill requires the Department of Revenue to calculate distinct Average Market Rates for indoor unprocessed retail marijuana and outdoor unprocessed retail marijuana. It legally mandates that the outdoor rate must be lower than the indoor rate. It also dictates that marijuana grown specifically for extraction (like fresh frozen marijuana used to make concentrates) must have a lower tax rate than flower meant for direct smoking, applying this rule to both indoor and outdoor crops. Finally, it strictly defines outdoor weed as crops grown under natural sunlight and weather conditions, without the use of canopy light deprivation.

What It Means for You

If you don't work in the cannabis industry, you might be wondering why you should care how weed is taxed at the wholesale level. The answer comes down to where that money goes. Colorado's 15% wholesale excise tax is entirely earmarked for the Building Excellent Schools Today (BEST) program. This is the fund that pays for public school construction, roof repairs, and safety upgrades across the state. By making the tax code more accurate—ensuring outdoor farmers aren't taxed out of business by inflated rates—the state is stabilizing a crucial revenue stream that our local school districts rely on.

As a consumer, you probably know that sun-grown weed and indoor hydroponic flower are entirely different products with different price tags. By taxing them appropriately, this legislation helps stabilize the market for outdoor growers. When these farmers aren't squeezed by taxes based on premium indoor prices, they have a better chance of keeping their operating costs down. Over time, that translates to more stable, affordable pricing at your local dispensary, particularly for edibles, vape cartridges, and concentrates, which heavily rely on outdoor and fresh frozen marijuana.

The changes officially take effect on July 1, 2026. You likely won't see an overnight price drop at the dispensary counter, but you will see a healthier, more competitive market that allows a wider variety of sun-grown products to survive the recent industry downturn. If you regularly buy concentrates or edibles, keep an eye on how dispensaries price their in-house brands once these lower tax rates for extraction-bound outdoor weed kick in.

What It Means for Your Business

If you own a vertically integrated marijuana business with an outdoor cultivation facility, this bill acts as a direct relief valve for your bottom line. Under the old system, your inter-company transfers were taxed against an Average Market Rate (AMR) that was artificially inflated by the higher value of indoor flower. Starting July 1, 2026, the state will use an isolated outdoor rate that legally must be lower than the indoor rate. This means your excise tax burden on internal transfers will finally reflect the actual economic reality of a sun-grown crop, freeing up cash flow that was previously lost to an inaccurate tax formula.

The legislation also locks in crucial protections for processors and manufacturers. It explicitly mandates that marijuana allocated for extractions (like fresh frozen marijuana) will carry a lower AMR than flower bound for direct sale to consumers, regardless of whether it was grown indoors or outdoors. However, you need to pay close attention to the new statutory definitions. To qualify for the cheaper outdoor rate, your crop must be grown under natural sunlight and weather conditions without the use of light deprivation in the canopy. Using artificial light to maintain vegetative plants under 24 inches or to keep mother plants alive is still permitted, but you cannot pass off a light-deprivation greenhouse crop as "outdoor" under this new framework.

While the law takes effect in July 2026, the Department of Revenue has until July 1, 2027 to adopt the finalized rules for calculating these new rates. Cultivators should start consulting with their compliance officers and CPAs now. You will need to ensure your METRC and internal inventory tracking systems perfectly delineate between indoor, outdoor, direct-sale, and extraction-bound biomass so you can seamlessly take advantage of these lower tax liabilities the moment the new AMRs go live.

Follow the Money

According to the nonpartisan fiscal note, this bill will have a "minimal" net impact on the state's overall budget. In FY 2024-25, Colorado collected about $40.1 million from the retail marijuana excise tax, which strictly funds the Building Excellent Schools Today (BEST) program. Because this bill lowers the taxable value for outdoor weed but isolates and potentially raises the taxable value for premium indoor weed, the Department of Revenue expects the shifts to largely balance each other out.

The Department of Revenue will face a slight increase in workload to rewrite their tax rules and update their backend software to calculate the new, distinct quarterly rates. However, the state expects to handle this within their existing budget and normal rulemaking schedule, requiring zero new taxpayer appropriations or additional full-time staff.

Where This Bill Stands

HB26-1077 is currently Signed Into Law. The latest official action came on 06/03/2026: Governor Signed.

That means the legislative process is complete and the bill is now law. The remaining questions are about implementation timing and how agencies, businesses, or local governments respond.