
How cannabis dispensary taxes actually work under IRS 280E, how quarterly payments are calculated, and how much money you should set aside to avoid penalties and cash flow problems.
Cannabis remains federally illegal under Schedule I of the Controlled Substances Act.
Because of this, IRS 280E prevents cannabis businesses from deducting normal operating expenses.
You may deduct:
You may not deduct:
This increases taxable income significantly.
Federal corporate tax is 21%.
However, the tax base is inflated under 280E.
Revenue: $3,000,000
COGS: $1,800,000
Operating expenses: $900,000
True profit: $300,000
Taxable income under 280E:
$3,000,000 – $1,800,000 = $1,200,000
Federal tax at 21%:
$252,000
Effective tax rate on real profit:
$252,000 ÷ $300,000 = 84%
This is why many dispensaries feel profitable but run out of cash.
The IRS requires businesses to prepay taxes throughout the year.
Estimated payments are generally due:
Quarterly payments are based on expected annual taxable income — not real profit.
Using the example above:
Annual federal tax: $252,000
Quarterly payment: $63,000
If those funds are not reserved, penalties may apply.
The IRS may assess:
Repeated underpayment can increase audit risk.
A simple calculation:
Example:
Expected annual tax: $252,000
Weekly reserve:
$252,000 ÷ 52 = $4,846
That amount should be transferred weekly into a separate tax account.
Without a dedicated tax reserve:
A separate account protects operating cash and reduces risk.