Workers’ Comp Classification Codes: Getting Them Right
Classification is the quietest line item in your workers’ compensation policy and the one most likely to be wrong. It is chosen once, usually early, often by someone filling in a form quickly, and then it silently drives your premium for years.
The reason to care is not that a bad code costs you money this year. It is that a bad code costs you money this year, gets corrected against you at audit, and then follows you into your experience modification, where it keeps costing you after the underlying facts have changed.
What a classification code actually is
A class code describes the kind of work performed. Its function is comparison: it groups employers with similar operations so an individual company’s loss experience can be measured against a meaningful peer set, and so a rate can be attached to a unit of payroll.
Minnesota administers classification through the Minnesota Basic Manual, prepared by the Minnesota Workers’ Compensation Insurers Association as a Minnesota-specific layer over the national NCCI manual. Two provisions in that manual are worth reading as an employer.
First, MWCIA may determine the propriety of classification assignments and has the right to conduct inspections of operations and assign classifications. Second, MWCIA has authority to conduct test audits and require corrections in line with the results.
Translated: you do not pick your codes. You describe your operations, and a carrier and a rating bureau decide. Describing them loosely is how the wrong answer gets locked in.
Where cannabis operations land
The industry is newer than the classification system, and the fit is imperfect. Broadly, and subject to your carrier’s determination:
- Cultivation. The farm classification for field crop operations was amended to specifically include cannabis cultivation. This is agricultural work, and it is rated accordingly.
- Processing and manufacturing. Extraction, oil production, and edibles manufacturing generally sit in a manufacturing classification rather than a farm one.
- Retail dispensary. Depending on the operation, either a general retail store classification or a drugstore and pharmacy classification. Delivery-only sales operations are frequently grouped with retail.
- Security. In-house guards are commonly assigned to a guard or patrol classification distinct from the operation they protect.
- Clerical and administrative. Office staff typically fall under the clerical office classification, which carries a substantially lower rate than operational codes.
Treat the above as orientation, not assignment. Codes are assigned on the facts of your operation by people whose job that is, and getting the description right at application is more valuable than knowing the code numbers.
The three failure modes
One code for a business that does several things
The most common. A vertically integrated operator grows, processes, and sells, employs office staff and security, and carries a single classification because that is how the first policy was written when the business was one room and three people.
If that single code is a low-rated one, you are underpaying and the audit will find it. If it is a high-rated one, you have been overpaying your clerical payroll at a cultivation rate for years, and nobody will volunteer that information.
Classification drift
The operation changes and the policy does not. You added extraction. You brought delivery in-house. You built a consumption space. Each of those can change the classification picture, and the policy keeps describing the business you were two years ago.
Division of payroll without records
The rules permit splitting an employee’s payroll across classifications in defined circumstances, but they require records that support the split. Without verifiable records, payroll is generally assigned to the highest-rated classification the work falls within.
So a manager who spends most of their week in the office and some of it on the production floor is either documented with contemporaneous time records showing the split, or they are entirely production payroll. That is a payroll systems question long before it is an insurance question.
What counts as payroll
Worth knowing because underreporting is rarely deliberate. For workers’ compensation purposes, payroll means money or substitutes for money. That is broader than most people’s mental model of gross wages, and the definition, plus the exclusions and inclusions, is set out in the Basic Manual.
If you are estimating your payroll figure rather than pulling it from a payroll register, you are guessing at the input that determines your premium.
The premium audit
At expiration or cancellation of every policy, your carrier reviews and verifies your payroll and classification against your actual records. Payroll paid over the policy term directly determines premium, so this is a true-up, not a formality.
Two things make audits go badly. The first is a records gap — payroll registers that do not reconcile, time records that do not support a claimed split, cash payments that appear nowhere. The second is a classification that does not match what the auditor observes on site.
An underreported year produces an additional premium bill, arriving at whatever moment the auditor finishes rather than at a moment you planned for.
Separately, Minnesota runs a test audit program to verify the accuracy of statistics reported to MWCIA, involving a physical examination of the employer’s books and records. Test audits are selected at random against set criteria.
The experience mod is where it compounds
This is the part that turns a pricing error into a multi-year problem.
MWCIA generates experience rating factors for qualified Minnesota employers. Experience rating compares an individual employer’s payroll and loss record against the average employer in the same classification, producing a modification factor that raises, lowers, or leaves your premium unchanged.
Read that clause again. If the classification is wrong, you are being compared to the wrong peer group, and the resulting factor is wrong in a way that carries forward.
Several mechanics matter here:
- Modifications are typically calculated once a year, and changes to a claim during the year land in the next rating year.
- Mods are revised only when corrected data is submitted by the carrier. Finding the error yourself does not fix it; the carrier has to file the correction.
- Claim frequency generally moves a mod more than severity. Several small claims totaling a given amount hit harder than one claim of the same total.
- Loss history follows the business in most cases, whether the business was sold or just the assets.
- Businesses sharing more than 50% common ownership are subject to a single modification factor based on their combined data — directly relevant to operators running cultivation and retail as separate entities.
How to fix a code you think is wrong
- Pull your current policy and list every classification on it with the payroll assigned to each.
- Write down what each employee actually does, in operational terms, not job titles. “Trims and packages product” beats “Production Associate II.”
- Flag anyone whose work spans classifications and check whether your time records could support a division of payroll.
- Raise it with your broker and carrier in writing, with the operational description attached. Corrections flow from the carrier.
- Ask what the correction does to your experience modification, in both directions. Sometimes the mod effect outweighs the rate effect.
- Fix the time-tracking configuration at the same time, so the next audit has records rather than assertions.
Raising a classification question is not an invitation to be audited. Discovering the same issue during an audit, with no records, is materially worse.
How we handle it
Roll With Paid. quotes by workers’ compensation classification code rather than applying a single blended rate across a whole workforce. That structure exists for a specific reason: a business whose payroll is mostly clerical should not be priced like one whose payroll is mostly cultivation, and a blended number hides which is which.
It also means the classification conversation happens at quoting time, on the actual duties of actual roles, rather than at audit time. Your specific rates depend on your roles, your census, and your payroll history — that is a pricing conversation, and it starts with a review of what your people really do.
Related: understanding employer of record for high-risk industries, five payroll mistakes cannabis businesses can’t afford, 280E and payroll, and our Employer Resources page.
Frequently asked questions
What is a classification code?
A code describing the type of work performed, used to group similar employers so loss experience can be compared and premium calculated. Minnesota administers classification under the Minnesota Basic Manual, and MWCIA may determine the propriety of assignments.
Which codes apply to cannabis businesses?
It depends on the operation — cultivation, processing, retail, security, and clerical work each map differently. Assignment is fact-specific and made by the carrier and rating bureau, not chosen by the employer.
What happens in a premium audit?
At policy expiration or cancellation, the carrier verifies payroll and class assignments against your records and adjusts premium. Underreporting produces an additional premium bill.
How does a wrong code affect my experience mod?
Experience rating compares you to the average employer in the same classification. Wrong classification means the wrong benchmark, and the resulting factor carries into future premium even after the code is corrected.
Can payroll be split across codes?
In defined circumstances, with records that support the split. Without verifiable records, payroll is generally assigned to the highest-rated classification the work falls within.
Roll With Paid. is not a law firm or an insurance carrier and does not provide legal advice. Classification assignment is determined by your carrier and the rating bureau on the facts of your operation. This article is general information as of August 2026; consult your broker, carrier, or MWCIA for determinations about your business.