Cannabis CPA Case Studies
Five recent cannabis CPA case studies from the GreenGrowth CPAs team, with the numbers: a dispensary's federal tax cut 38%, a CDTFA audit reduced from $220,000 to $35,000, and a dispensary purchase price cut from $600,000 to $250,000 through due diligence. Client names are withheld. Every result depends on that client's facts, so your numbers will differ.
Reviewed by Daniel Sabet, CPA, Senior Manager, CFO · Updated November 2026
Cannabis Tax, Audit and Deal Results at a Glance
Each case below shows the client, the problem, what our team did and the before-and-after numbers.
| Client | Problem | Result |
|---|---|---|
| Dispensary, Billings, Montana | 280E left most costs non-deductible | Federal tax down $83,740 (38%) |
| Cultivator, Oklahoma | Costs of sold product stuck in ending inventory | Federal tax down $60,148 (20.4%) |
| Buyer of a Fresno, California dispensary | Hidden liabilities in a $600,000 stock deal | Price cut to $250,000 |
| Dispensary, Orange County, California | $220,000 CDTFA audit assessment | Reduced to $35,000 |
| Dispensary, Chicago, Illinois | More than 2 years of neglected books | Current in 45 days; $75,000 cash gap found |
How a Montana Dispensary Cut Its Federal Tax by 38%
A Billings, Montana dispensary reduced its federal income tax by $83,740, or 38%, after our team moved $398,763 of indirect costs into cost of goods sold. Under Section 280E the dispensary could only reduce federal tax through cost of goods sold, so how inventory costs were captured decided the size of the bill.
The Client
A cannabis dispensary operating as a C corporation in Billings, Montana, with annual revenue of $2,376,858.
What We Did
Implemented a Section 471(c) inventory accounting approach, consistent with the company's books and records, allocating $398,763 of expenses into indirect costs of goods sold.
Timeframe
The accounting review and implementation took 90 days. The tax reduction shown covers one full tax year.
| Federal tax calculation | Before | After |
|---|---|---|
| Cost of goods sold | $1,327,483 | $1,726,246 |
| Federal taxable income | $1,049,375 | $650,612 |
| Federal income tax at 21% | $220,369 | $136,629 |
| Federal tax reduction | $83,740 (38%) | |
Running a dispensary under 280E? See how we handle dispensary accounting and the 280E tax rules.
Review My 280E PositionHow an Oklahoma Cultivator Saved $60,148 by Fixing Its Inventory Costing
An Oklahoma cannabis cultivator cut its federal income tax by $60,147.57, a 20.4% reduction, after our review found $286,417 of production costs for product already sold still sitting in ending inventory. Moving those costs into cost of goods sold lowered taxable income for the year.
The Client
A cannabis cultivator operating as a C corporation in Oklahoma, with annual revenue of $3,254,980.
What We Did
An extensive inventory costing review that reconciled cultivation expenses, harvest records and product sales, then corrected the allocation of $286,417 in eligible production costs.
Timeframe
The review and implementation were completed during the final 90 days of the tax year.
| Federal tax calculation | Before | After |
|---|---|---|
| Annual revenue | $3,254,980 | $3,254,980 |
| Cost of goods sold | $1,847,632 | $2,134,049 |
| Federal taxable income | $1,407,348 | $1,120,931 |
| Federal income tax at 21% | $295,543.08 | $235,395.51 |
| Federal tax savings | $60,147.57 (20.4%) | |
Growing under 280E? See our cannabis cultivator accounting services.
Review My Inventory CostingHow Due Diligence Cut a Dispensary Purchase Price from $600,000 to $250,000
A California cannabis operator buying a Fresno dispensary through a stock purchase paid $350,000 less, a 58.3% reduction, after our due diligence uncovered $225,000 in unpaid taxes, interest and penalties and about $60,000 in unrecorded payables. In a stock purchase the buyer inherits the company's liabilities, so finding them before closing changes the price.
The Client
A California cannabis operator acquiring an additional dispensary in Fresno through a stock purchase initially priced at $600,000.
What We Found
$225,000 in unpaid taxes, interest and penalties (federal and state income tax, California sales and excise tax), about $60,000 in unrecorded accounts payable, about $30,000 in inventory misstatements, and further exposure because the seller had deducted operating expenses without applying Section 280E.
What We Did
Represented the buyer in financial and tax due diligence, quantified each finding and supported the negotiations to reduce the price. All of it was completed before closing.
| Deal metric | Amount | |
|---|---|---|
| Initial stock purchase price | $600,000 | |
| Renegotiated stock purchase price | $250,000 | |
| Purchase price reduction | $350,000 (58.3%) | |
| Identified tax liabilities and unrecorded payables assumed by buyer | $285,000 | |
The buyer secured a $350,000 price reduction while assuming the identified liabilities, and closed with clear visibility into the remaining tax exposure.
Buying a cannabis business? See our cannabis due diligence and deal-gap checklist.
Talk About a DealHow an Orange County Dispensary Reduced a $220,000 CDTFA Audit to $35,000
An Orange County cannabis dispensary cut a $220,000 CDTFA audit assessment to $35,000, a reduction of $185,000 or 84.1%, after our team rebuilt the records the store could not produce during the first audit. Missing medical sales documentation, point-of-sale history and proof of tax payments had driven the original assessment.
The Problem
During the initial audit, store personnel could not locate medical sales documentation, historical point-of-sale records or proof of tax payments, and the CDTFA assessed $220,000.
What We Did
Represented the dispensary in the appeal and coordinated with the newly assigned auditor. We deployed our team to the store to reconstruct the supporting records: medical documentation for transactions in the audit sample, historical sales data secured through persistent follow-up with the former POS provider, and evidence of taxes previously paid.
Timeframe
The work ran after the initial assessment, through the audit appeal and review process.
| Audit outcome | Amount | |
|---|---|---|
| Initial assessment | $220,000 | |
| Final assessment | $35,000 | |
| Assessment reduction | $185,000 (84.1%) | |
Facing a CDTFA audit? See our California cannabis accounting services, or meet the team at our Irvine office.
Get Audit HelpHow a Chicago Dispensary Brought 2 Years of Books Current in 45 Days
A Chicago cannabis dispensary with more than 24 months of neglected books had current records within 45 days, and the cleanup surfaced a $75,000 cash discrepancy the records could not support. The owner had taken the store back after buyers running it under a management services agreement walked away before closing.
The Problem
The books had been neglected for more than two years and contained significant inaccuracies when the original owner resumed control of the dispensary.
What We Did
Reconstructed the accounting records, reconciled the available bank activity and cash logs, and brought the books current. We flagged $75,000 of cash discrepancies unsupported by the records for further investigation.
Timeframe
Completed within 45 days of the start of the engagement.
| Cleanup outcome | Result | |
|---|---|---|
| Bookkeeping backlog addressed | More than 24 months | |
| Time to bring books current | 45 days | |
| Unexplained cash variance identified | $75,000 | |
Books behind? See our cannabis bookkeeping and Illinois cannabis accounting services.
Talk About Your BooksCan a CPA lower a dispensary's federal tax under 280E?
Yes, through cost of goods sold. Under Section 280E a cannabis business can only reduce federal tax through cost of goods sold, so how inventory costs are captured matters. In one case, moving $398,763 of indirect costs into cost of goods sold cut a Montana dispensary's federal tax by $83,740, or 38%. Results depend on each business's facts and records.
Can a CDTFA cannabis audit assessment be reduced?
Often, when the missing records can be found. In one Orange County case, rebuilding medical sales documentation, historical point-of-sale data and proof of taxes paid reduced a $220,000 CDTFA assessment to $35,000 on appeal.
What does due diligence find when buying a dispensary?
Unpaid taxes, unrecorded payables, inventory errors and 280E exposure are common. In one Fresno acquisition, due diligence found $225,000 in unpaid taxes, interest and penalties and about $60,000 in unrecorded payables, and the buyer renegotiated the price from $600,000 to $250,000.
How long does a cannabis bookkeeping cleanup take?
It depends on the backlog and the records available. In one Chicago case, more than 24 months of neglected books were brought current in 45 days.
Results shown come from specific client engagements carried out by the GreenGrowth CPAs team. They depend on each client's facts, records and the tax law in effect for the year, and they do not guarantee a similar outcome. Client names are withheld. Federal figures reflect tax years when Section 280E applied.
See What We Can Find in Your Books
GreenGrowth CPAs works with dispensaries, cultivators, manufacturers and buyers of cannabis businesses on 280E, audits, due diligence and bookkeeping. See all cannabis accounting services.
