Cannabis Inventory Audits in Oregon, Washington & California: What the Law Actually Requires

Cannabis is the most heavily regulated product on any West Coast retail shelf. The flower in a jar, the cartridge in a display case, the gummy in a child-resistant pouch — every one of them is tagged, weighed, and tracked from the moment it leaves a cultivator to the moment it crosses your counter. That tracking is enforced by the state, audited by the state, and the records are expected to match the physical product on the shelf.

For a licensed cannabis retailer, processor, or cultivator, an accurate physical inventory is not a back-office nicety. It is the entire basis of your license. A variance between what the state’s seed-to-sale system says you have and what is actually in the room is a compliance event — potentially a fine, a hold, a suspension, or, in a sale, a deal-killer.

This guide covers what the law actually requires in the three West Coast cannabis markets — Oregon, Washington, and California — with citations to the live regulator pages and rules. It also covers the two areas where most operators get tripped up: weight-based counting and ownership transfers.

Oregon — OLCC and Metrc (CTS)

Oregon’s cannabis program is run by the Oregon Liquor and Cannabis Commission (OLCC). Every licensed marijuana business in the state is required to use the Cannabis Tracking System (“CTS”), which in Oregon is Metrc. The requirement is set out in OAR 845-025-7500.

Physical-inventory and reconciliation duties are split across two rules:

• OAR 845-025-7580 — Reconciliation with Inventory. Licensees must reconcile physical inventory against the CTS, including reconciling weight variance from moisture loss before product is transferred, processed, packaged, or sold — and not later than 45 days after harvest.
• OAR 845-025-7590 — Seed-To-Sale Tracking — Inventory Audits. This is the audit rule itself. Because cadence and scope can shift between license types and rule updates, licensees should read the current text of this rule on the schedule their license requires.

OLCC has also published a Compliance Education Bulletin that signals inventory accuracy as a focus area for enforcement. In Oregon, “the count matches Metrc” is not best practice — it is the rule.

Washington — WSLCB and CCRS

Washington’s cannabis market is regulated by the Washington State Liquor and Cannabis Board (WSLCB). Track-and-trace runs on the Cannabis Central Reporting System (CCRS), a state-built platform that replaced Leaf Data Systems in December 2021 and is the system of record today.

Three WAC sections do most of the inventory work:

• WAC 314-55-083 — Inventory requirements. Licensees must maintain a complete inventory of all marijuana plants, useable cannabis, extracts, infused products, packaging, and waste. Every unit is physically tagged and tracked.
• WAC 314-55-087 — Recordkeeping. Records must be kept in a form that supports inspection by the WSLCB.
• WAC 314-55-089 — Reporting. Monthly reporting covers production, inventory on hand, sales, and product that was lost or destroyed. Records must be kept on the premises for three years and made available to the WSLCB on request.

California — DCC and CCTT-Metrc

California consolidated its cannabis programs under the Department of Cannabis Control (DCC). Statewide track-and-trace is handled by the California Cannabis Track-and-Trace system, branded as CCTT-Metrc. It has been mandatory since January 2018.

The track-and-trace rules live in Title 4 of the California Code of Regulations, sections 15000–17905. Three sections matter most for inventory:

• 4 CCR § 15048 — Track and Trace Reporting. The reporting backbone — every package, transfer, and adjustment goes into CCTT-Metrc.
• 4 CCR § 15049 — Recording Transfers. Movement of cannabis goods between licensees is recorded in the track-and-trace system, with manifests required.
• 4 CCR § 15051 — Reconciliation. Licensees must reconcile physical inventory against the track-and-trace record on the cadence the regulation requires for their license type.

Because the exact reconciliation cadence has shifted between rule versions and varies by license category, the safest course is to pull the current text of 4 CCR §§ 15048 and 15051 directly from the DCC regulations page and reconcile on that schedule. Enforcement priorities are spelled out in the DCC’s Cannabis Disciplinary Guidelines.

Weight-Based Counting: Why a Tenth of a Gram Matters

In c-store and grocery audits, “the count” is overwhelmingly a unit count: how many cans, how many cartons, how many bottles. Cannabis is different. Most regulated cannabis product is tracked by weight — usually in grams, often to a tenth of a gram — and the weight on the package, the weight in the state’s track-and-trace system, and the weight on a compliant scale all have to agree.

• Oregon. CTS/Metrc rules require usable marijuana to be tracked by weight and tied to unique CTS package tags (OAR 845-025-7070). Weight reconciliation, including moisture loss, is built directly into OAR 845-025-7580.
• Washington. Under WAC 314-55-083, all useable cannabis, trim, extracts, infused products, and waste must be inventoried and tagged. The CCRS Data Model File Specifications Manual requires quantity and unit-of-measure on every record.
• California. CCTT-Metrc requires weight, volume, or count with a unit-of-measure on every package. Commercial cannabis scales are separately regulated by the CDFA Division of Measurement Standards. Operators frequently see DCC enforcement focus on weight precision at the tenth-of-a-gram level, with material variances expected to be explained.

The practical takeaway: a cannabis inventory audit that does not weigh product on a certified scale, against the tagged weight in the state system, is not really a cannabis inventory audit. It is a unit count of something that legally is not measured in units.

Ownership Transfers: The Count That Goes With the Manifest

The other place a cannabis inventory audit becomes load-bearing is at a change of ownership. Cannabis licenses are state-issued and tightly bound to who owns the business. When a license changes hands — or when product moves to a new licensee inside the state system — the count is not just an accounting exercise. It is the basis for the manifest that the regulator relies on.

• Oregon. OLCC licenses do not transfer with a business sale. A change of 51% or more in ownership requires a new OLCC license; inventory is moved from the seller’s Metrc account to the buyer’s via an OLCC-authorized manifest, and the seller’s license is then cancelled. The Metrc manifest is the legal record of what changed hands (Harris Sliwoski).
• Washington. Licenses are not freely transferable; changes require WSLCB approval, and inventory on the premises has to reconcile to CCRS at the time of transfer. There is no single WAC section that prescribes a change-of-ownership physical-inventory procedure — in practice, a clean third-party count tied to the CCRS record is how operators de-risk the handoff (WAC 314-55-083).
• California. Licenses are not transferable, but a change of ownership is permitted as long as at least one original owner (with a management/control role or at least 20% equity) remains. A partial change of ownership requires notice to the DCC within 14 days, and operations can continue. If all owners change, a new license is required and the business cannot operate until the DCC approves. On approval, inventory transfers to the new owner’s CCTT-Metrc account (DCC application resources; Manzuri Law).

Internal shrink is another quiet driver of count-to-system variance in cannabis retail, and is worth addressing as a management practice independent of the audit itself (Cova Software).

How Apex Supports Cannabis Operators

Apex is an independent, third-party physical inventory service. We do not sell software, dispense legal advice, or take an ownership stake in our clients’ product. We count what is on the shelf, weigh what needs to be weighed, and deliver a report your team and your regulator can rely on.

For cannabis clients in Oregon, Washington, and California, that looks like:

1. Weight-and-tag-aware counting. Every package is verified against its state-system tag — Metrc tag in Oregon and California, CCRS identifier in Washington — with weight captured on a certified scale where the product is tracked by weight.
2. Reconciliation against the state record. We compare the physical count to the operator’s CTS/Metrc, CCRS, or CCTT-Metrc inventory record and flag variances at the package level, not just the category level.
3. Transfer-of-ownership counts. When a license is changing hands, we deliver a count both buyer and seller can sign — aligned to the manifest the state will see.
4. Audit-grade documentation. The report is built to sit next to your state filings: clean variance, clean exclusions, clean weight reconciliation.

Apex Inventory Service provides independent third-party physical inventory counting and reconciliation services to licensed cannabis operators. Our work is designed to support our clients’ compliance with state cannabis regulations and seed-to-sale track-and-trace requirements, including OLCC (Oregon), WSLCB (Washington), and DCC (California). Apex is not a law firm and does not provide legal, regulatory, or licensing advice. State cannabis rules change frequently; licensees should confirm current requirements with the applicable state regulator or a licensed cannabis attorney before relying on any information presented here.

Sources

• Oregon Liquor and Cannabis Commission — Recreational Marijuana Laws and Rules. oregon.gov/olcc
• OAR 845-025-7500 — Cannabis Tracking System. oregon.public.law/rules/oar_845-025-7500
• OAR 845-025-7580 — Reconciliation with Inventory. oregon.public.law/rules/oar_845-025-7580
• OAR 845-025-7590 — Seed-To-Sale Tracking, Inventory Audits. oregon.public.law/rules/oar_845-025-7590
• OAR 845-025-7070 — CTS package tags. oregon.public.law/rules/oar_845-025-7070
• OLCC Compliance Education Bulletin CE2023-05. oregon.gov/olcc bulletin
• Washington State Liquor and Cannabis Board — CCRS. lcb.wa.gov/ccrs
• WAC 314-55-083 — Inventory requirements. app.leg.wa.gov WAC 314-55-083
• WAC 314-55-087 — Recordkeeping. law.cornell.edu WAC 314-55-087
• WAC 314-55-089 — Reporting and 3-year records retention. app.leg.wa.gov WAC 314-55-089
• WSLCB CCRS Data Model File Specifications Manual. lcb.wa.gov CCRS data model
• California Department of Cannabis Control — DCC Regulations. cannabis.ca.gov/dcc-regulations
• 4 CCR § 15049 — Recording Transfers. law.cornell.edu 4 CCR 15049.2
• Metrc — California Partner Page. metrc.com/partner/california
• CDFA Division of Measurement Standards — Cannabis Weighing & Measurement. cdfa.ca.gov/dms/CannabisWM
• DCC Cannabis Disciplinary Guidelines (Sept. 2021). cannabis.ca.gov disciplinary guidelines
• Harris Sliwoski — Oregon Cannabis Licenses: Change in Ownership. harris-sliwoski.com cannalawblog
• Manzuri Law — Business Transfers / Ownership Changes. manzurilaw.com ownership changes
• Cova Software — Cannabis Retail Loss Prevention. covasoftware.com loss prevention