Base rates are the same at every Massachusetts insurer, so you cannot shop for a lower rate. You lower the bill instead through job classifications, accurate payroll, your claims multiplier, and the credits and dividend plans insurers are allowed to offer. Who this is for: Massachusetts contractors and trades whose workers comp bill feels too high or has not been reviewed in years.
The short version
- Massachusetts workers comp base rates are approved by the state and are the same at every insurance company.
- Insurers compete only through approved credits, dividend plans, and the state's construction wage credit.
- The most common overcharge is an office worker rated as a field trade. Massachusetts has a strict rule for who counts as office staff.
- Uninsured subcontractors cost you twice: their pay lands on your audit, and your insurer pays their injured workers.
- Rates have been unchanged since the 14.6 percent decrease of July 1, 2024, so the price difference between quotes is about credits, not rates.
What actually sets my workers comp price in Massachusetts?
Workers comp pays medical bills and lost wages when an employee is hurt at work. Massachusetts requires it from your first employee, with no threshold. The price is a rate for each class code (the job category your payroll is rated under), times payroll, times a multiplier from your claims history. Credits, surcharges, and dividends then move the number.
| Price driver | How it works in Massachusetts | Can you change it? |
|---|---|---|
| Base rate | Approved by the Commissioner of Insurance on a filing from the Workers Compensation Rating and Inspection Bureau of Massachusetts (WCRIBMA). The same at every insurer. Unchanged since the 14.6 percent decrease of July 1, 2024. | No. |
| Class codes | Each job category has its own rate. Office work is rated far below field work, under a strict rule. | Yes. |
| Payroll | Charged per $100 of payroll. The year-end audit, the insurer's check of your real payroll, settles up. | Yes. Estimate honestly and keep records. |
| Claims multiplier | Built from your claims over three years. 1.00 is average. Massachusetts adds a surcharge when your losses run above expected, up to 25 percent. | Partly. |
| Credits and dividends | Approved insurer credits, dividend plans where offered, the state's construction wage credit, and deductible or premium discount programs. | Yes. This is where shopping pays. |
| Owner inclusion | Owners who choose to be covered are priced on a flat payroll figure the state sets, not on what they actually draw. Officers who own enough of the company can opt out. | Depends on your business type. |
For the state cost picture, see how much workers comp costs in Massachusetts.
Which levers can I pull before my next renewal?
Most of them. What each is worth depends on your trade, payroll, and claims history.
| Lever | What to do in Massachusetts | Illustrative savings |
|---|---|---|
| Fix classifications | Clerical code 8810 applies only to employees who do office work exclusively, behind structural partitions. Any other duty puts the whole payroll in the highest-rated class they are exposed to. | Depends on the payroll misclassified and the gap between the two class rates. |
| Keep job-by-job payroll records | Payroll can be split between field classes only if your original records show each employee's actual time by task. Estimates are not allowed. | Keeps low-rated work off your highest rate. |
| Ask about the construction wage credit | The Massachusetts Construction Classification Premium Adjustment Program gives a credit to employers paying an average of at least $30.00 an hour in eligible construction classes. Apply to the state rating bureau within six months after the policy expires. | Varies with wage level and classes. |
| Check the mod worksheet | Look for claims that are not yours, closed claims shown open, and reserves that are too high. | A lower multiplier lowers every dollar of the bill. |
| Collect subcontractor certificates | Under Massachusetts law your insurer pays an uninsured sub's injured workers, then pursues the sub. At audit the sub's pay is charged in the sub's own class. If you cannot show what the sub paid its workers, the auditor can charge a percentage of what you paid the sub, so keep the invoices. | The sub's pay, rated in the sub's own trade class. |
| Shop for credits and dividends | Insurers may file a discount below the state rate, add a discount for how you run the business, and offer dividend plans. One application to many insurers shows the spread. | The gap between the best and worst quote, which is the credits, not the rate. |
Why does the office worker rule matter so much in Massachusetts?
Because the rule is all or nothing. A bookkeeper behind a real wall who never touches a tool is clerical. The same bookkeeper who runs parts to a job site once a week is rated entirely as a field worker. See whether office staff cost less to insure in Massachusetts.
Should I take myself off the policy to save money?
Sometimes. An officer who owns at least 25 percent of the stock can opt out by filing a written waiver, state Form 153. Sole proprietors, partners, and LLC members are not covered unless they elect in, and are then priced on a $70,000 payroll basis, effective October 1, 2025. Opting out removes your own coverage. See whether you can exclude yourself from workers comp in Massachusetts.
If the rates are the same everywhere, why shop at all?
Because the rate is only the starting point. An insurer can file to charge a set percentage below the state rate, and can add a discount for things like a documented safety program. Those two are what one insurer has and another does not. Dividend plans, where offered, return part of the premium after a good year. If no insurer will quote you, the state rating bureau places you in the state pool at the state rates. See how to reduce workers comp costs.
What this looks like in real life
Illustrative example. It is typical of what we see and is not a promise of how any specific situation would be handled.
The setup: A framing contractor in Lowell has eight employees and about $560,000 in payroll. His workers comp renews at roughly $61,000 with a claims multiplier of 1.12 and a surcharge. His crews average $34 an hour.
What went wrong: A review finds his office manager rated as a framer because her desk sits in the open shop. A closed claim on the mod worksheet still shows a $27,000 reserve. He has never applied for the wage credit, and two subs never sent certificates.
What it cost: Illustrative numbers: a partition wall costs $2,200 and moves $52,000 of payroll to the clerical class, saving about $5,600. Correcting the claim drops the multiplier to about 1.03 and removes the surcharge, saving about $6,900. The wage credit trims about $3,100. Shopping six insurers finds a credit and dividend plan below the corrected price. The bill falls from about $61,000 to about $42,000.
The fix: Not one dollar came from a lower base rate, because there is no lower base rate in Massachusetts. Every saving came from records, classifications, credits, and shopping.
Frequently asked questions
Q: How can I reduce my workers comp costs in Massachusetts?
Fix job classifications, keep payroll records by task, check your claims multiplier worksheet, apply for the construction wage credit if you qualify, collect subcontractor certificates, and shop for credits and dividend plans. Base rates are the same at every Massachusetts insurer.
Q: Are workers comp rates really the same at every insurance company in Massachusetts?
Yes. Base rates are approved by the Commissioner of Insurance and every insurer uses them. Insurers compete only on a filed discount below the state rate, a discount for how you run the business, dividend plans, and the state's construction wage credit.
Q: Did Massachusetts workers comp rates go up in 2025 or 2026?
No. Rates were cut 14.6 percent on July 1, 2024 and have not changed since. If your bill rose, something in your own account moved.
Q: Can my office manager be rated as clerical if she sometimes visits job sites?
No. Any duty outside the office puts her whole salary in the highest-rated class she is exposed to.
Q: What should I have ready before asking for a quote?
Three years of claims history, a payroll list by job class, your current declarations page, and your last audit. With those, a broker can compare credits instead of guessing.
Q: Will paying my crew as 1099 contractors lower my Massachusetts workers comp?
No. Massachusetts uses a strict test for who counts as an employee, and at audit the pay of any sub without its own insurance lands on your policy. If an uninsured sub's worker is hurt, your insurer pays and then pursues the sub.
How Morrow helps
Morrow is a licensed independent commercial insurance brokerage that works with contractors and trades every day. Checking a Massachusetts contractor's classifications, mod worksheet, and credit eligibility, then shopping for approved credits and dividends, is where we most often find money a client did not know they were losing.
- Free contract review. Send us the contract or bid documents and we mark up the insurance section in plain English, whether or not you buy anything from us.
- Free, instant certificates. Clients issue their own certificates of insurance online in about a minute, any hour, any day, at no charge.
- Markets you cannot reach online. One application, shopped across many insurance companies for general liability, workers comp, auto, umbrella, and pollution coverage.
One more thing. This article is general information and is not legal advice or a statement of coverage. Your contract and your policy wording control in every case. Requirements vary by customer, by state, and by insurance company, so have a licensed advisor review your own contract and your own policy before relying on any of it.
Last updated: Reviewed by the Morrow commercial lines team. Last updated September 2026.