Why Monthly Reconciliation Matters
METRC is not just a compliance tool. It is the system of record that regulators use to verify that every plant, every gram of flower, and every package in your facility is accounted for. When your physical inventory does not match your METRC records, you have a compliance problem.
Small discrepancies that go unaddressed become large discrepancies over time. A 50-gram variance in one batch may seem trivial, but multiply that across dozens of batches over several months and you could be looking at pounds of unaccounted product. That is the kind of discrepancy that triggers a regulatory audit, and the kind that is very difficult to explain after the fact.
Monthly reconciliation catches these issues while they are still small, traceable, and correctable. It is the single most effective practice for maintaining METRC compliance in a cultivation operation.
The Step-by-Step Monthly Protocol
Step 1: Export METRC Data
At the beginning of each month, export the following reports from METRC for the prior month: active plant inventory (immature and vegetative plant counts by tag), flowering plant inventory by tag, harvest batch summary (all batches harvested during the month, including wet weight and dry weight), active package inventory (all packages with current quantities), and transfer manifests (all incoming and outgoing transfers).
Save these exports in a dedicated folder with the month and year clearly labeled. These files become part of your permanent compliance record.
Step 2: Conduct Physical Inventory Count
Perform a physical count of every category of inventory in your facility. For immature plants, count by lot or tray and compare against the immature plant lot tags in METRC. For vegetative and flowering plants, count individual plants by room or zone and compare against active plant tags. For harvested material in drying or curing, weigh each batch and record the current weight against the METRC harvest batch tag. For packaged inventory, count and weigh each package and compare against the METRC package tag.
Use a two-person count team. One person counts; the other records. This reduces counting errors and provides a second witness for documentation purposes.
Step 3: Identify Variances
Compare your physical counts and weights against the METRC system balances. Any difference is a variance that must be investigated. Categorize variances into three buckets: plant count variances (physical plant count does not match METRC active tags), weight variances (physical weight does not match METRC recorded weight for harvest batches or packages), and tag variances (physical tags that do not appear in METRC, or METRC tags with no corresponding physical inventory).
Step 4: Investigate Root Causes
Every variance has a cause. The most common causes in cultivation are outlined below, but do not assume the cause until you have confirmed it. Review cultivation logs, employee notes, security footage if necessary, and any other records that can explain the discrepancy.
Step 5: Enter Adjustments in METRC
Once the cause is identified and documented, enter the appropriate adjustment in METRC. Use the correct adjustment reason code. Common reason codes for cultivation include waste (for material that was discarded), moisture loss (for weight reduction during drying), and processing loss (for material lost during trimming or other post-harvest handling).
Every adjustment should be supported by an internal adjustment form that records the date, the METRC tag or batch number, the adjustment amount, the reason code, the name of the person who identified the issue, and the name of the person who entered the adjustment. Keep this form with your reconciliation records.
Step 6: Verify Post-Adjustment Balances
After entering all adjustments, re-export the METRC data and verify that the adjusted balances now match your physical inventory. If they do not, you have either entered an adjustment incorrectly or missed an additional variance. Repeat Steps 3 through 5 until your records balance.
Handling Waste Adjustments
Waste is unavoidable in cultivation. Dead plants, root-bound clones that do not survive transplant, male plants identified during sexing, and diseased plants that must be destroyed all generate waste that must be recorded in METRC.
Documenting Waste
Every waste event should be documented with the plant tag or batch number, the date of destruction, the reason for destruction, the weight of material destroyed, the names of the two employees who witnessed the destruction, and photographic evidence (recommended but not always required by regulation).
In METRC, waste is recorded using the appropriate waste adjustment on the plant or package tag. Some states require that waste be physically rendered unusable (mixed with non-cannabis material) before disposal. Others require that a regulator witness the destruction for quantities above a certain threshold.
Common Waste Triggers
The most frequent waste events in cultivation include clone mortality during propagation (typically 5% to 15% of clones do not survive), plants culled during vegetative growth due to disease, pest pressure, or poor genetics, male or hermaphrodite plants identified during early flower, and failed COA test batches that cannot be remediated.
Track your waste rates by cause and by room. High waste rates in a specific area may indicate environmental issues, IPM failures, or employee training gaps that need to be addressed operationally.
Moisture Loss and Weight Variances
Moisture loss is the largest source of weight variance in cannabis cultivation. Freshly harvested cannabis is approximately 75% to 80% water by weight. After drying, the same material weighs 20% to 25% of its wet weight. This reduction must be accounted for in METRC.
Recording Moisture Loss
When you harvest a batch, METRC records the wet weight. After drying, you must update the batch weight to reflect the dry weight. The difference is recorded as a moisture adjustment. This adjustment is expected and legitimate, but it must be entered promptly and accurately.
Best practice is to weigh each batch at the end of drying (before trimming) and enter the dry weight in METRC within 24 hours. Delaying this entry creates a gap between your physical inventory and your METRC records that will show up as a discrepancy during reconciliation.
Acceptable Ranges
Monitor your wet-to-dry conversion ratio by strain. Most cannabis varieties lose 73% to 80% of their wet weight during drying. If a batch shows a conversion ratio outside this range, investigate. Unusually high moisture loss may indicate over-drying, which degrades product quality. Unusually low moisture loss may indicate under-drying, which creates mold risk. Either extreme warrants attention.
Conversion Variances
Conversion occurs when plant material changes form: whole flower is trimmed into manicured buds and trim; buds are ground and pre-rolled; flower is processed into concentrates. Each conversion step creates a variance between input weight and output weight.
Trim Loss
When whole flower is trimmed, the trim material (leaves, small stems, sugar leaf) is separated from the finished bud. This split must be recorded in METRC as a conversion or repackaging event, with the input tag (whole flower batch) converted into two or more output tags (trimmed flower and trim/shake).
Track your trim loss percentage by strain. Typical trim loss ranges from 15% to 30% of dry weight, depending on strain structure and trim method (hand trim versus machine trim). Significant deviations from historical averages for a specific strain should be investigated.
Sample Pulls
Quality assurance samples and COA testing samples reduce package weight. Every sample pull must be recorded in METRC with a sample adjustment. Failure to record sample pulls is one of the most common causes of small, recurring package weight discrepancies.
Common Discrepancy Causes
Data Entry Errors
Simple data entry mistakes account for a large percentage of METRC discrepancies. Transposed digits in weight entries, selecting the wrong tag, and entering the wrong adjustment reason code are all common. A second-person review of all METRC entries before submission significantly reduces these errors.
Timing Differences
An activity occurs on the facility floor but is not entered into METRC until the next day. During the gap, the physical inventory does not match the system. Implement a policy of same-day METRC entry for all inventory-affecting events. If same-day entry is not possible, document the delay and enter the data within 24 hours at most.
Scale Calibration
If your scales are not calibrated regularly, weight entries will drift from actual weights over time. Calibrate all scales monthly using certified test weights. Document each calibration with the date, scale ID, test weight used, reading before adjustment, and reading after adjustment.
Unreported Waste
Plants die, material spills, and product is damaged during handling. If these events are not reported and recorded in METRC, the system will show inventory that no longer physically exists. Train all cultivation staff to report waste events immediately, no matter how small.
Building Audit-Ready Documentation
The goal of monthly reconciliation is not just to keep METRC accurate. It is to build a documentation trail that proves your compliance to any regulator or auditor who reviews your records.
The Reconciliation File
Each monthly reconciliation should produce a complete file containing the METRC data exports, the physical inventory count sheets, the variance analysis with root cause explanations, copies of all METRC adjustments entered, the post-adjustment balance verification, and sign-off from the compliance manager or facility manager.
Store these files digitally with off-site backup and retain them for at least seven years, or longer if your state requires it. When a regulator asks for your reconciliation records, you want to hand them a clean, organized file for every month of operation.
Assigning Ownership
METRC reconciliation should be assigned to a specific person with clearly defined responsibilities and deadlines. The reconciliation should be completed by the 10th of the following month at the latest. If the assigned person identifies issues they cannot resolve, there should be a clear escalation path to the compliance manager and, if needed, to outside counsel or a compliance consultant.
Monthly METRC reconciliation is not exciting work. But it is the work that keeps your license intact, your regulators satisfied, and your operation running without interruption.