Workers' comp is one of those things a lot of small contractors try to avoid because the cost feels like a lot when you're already running tight margins. I understand that math. I also understand what happens to guys who skip it and have someone get hurt on the job, and that math is a lot worse.
Here's what you need to know about how it works, what it costs, and why the cost goes into your bids — not your pocket.
What workers' comp actually does
Workers' compensation insurance covers your employees if they're injured or become ill because of their work. It pays their medical bills, covers a portion of their lost wages while they're unable to work, and provides disability benefits if the injury is serious. In exchange for this coverage, employees generally give up the right to sue you directly for workplace injuries.
That last part is important. Without workers' comp, an injured employee can sue you personally. With it, they go through the workers' comp system, you pay your premiums, and that's the end of your direct exposure in most cases. It's a protection that runs both directions — for the employee and for you.
What happens when you skip it
In most states, if you have employees, workers' comp is legally required. The penalties for operating without it range from significant fines to criminal liability depending on the state. But the real exposure is what happens when someone gets hurt.
An uninsured employer in that situation is personally liable for medical costs, lost wages, and often additional damages. A serious injury — a broken leg, a back injury, anything requiring surgery — can easily run into six figures. An uninsured contractor facing that claim is looking at losing their business, their equipment, and in some cases their personal assets.
I've known guys it happened to. It's not theoretical.
How your rate is calculated
Workers' comp premiums are based on three things: your payroll, your classification code, and your experience modification factor.
Classification codes are how the industry categorizes different types of work. Excavation and dirt work has a different rate than landscaping, which has a different rate than painting. Higher-risk work has higher rates. In excavation and site prep, rates typically run between 8% and 15% of payroll — which is meaningful and needs to be in your bids.
Experience modification (ex-mod) is a multiplier based on your claims history. A brand new business starts at 1.0. If you've had claims, your ex-mod goes above 1.0, meaning you pay more. If you've had no claims, it can drop below 1.0 over time, which saves you money. One serious claim can raise your ex-mod significantly and affect your premiums for years.
This is why job site safety isn't just the right thing to do — it's directly tied to your operating costs.
What you pay: a real example
Say you're running two employees at a total payroll of $120,000 per year. You're doing site prep and excavation work — let's call the rate 12%. Your base premium is $14,400 per year. At a 1.0 ex-mod, that's what you pay. If you've had a prior claim and your ex-mod is 1.3, you're at $18,720. If you've had no claims and earned a 0.88 ex-mod, you're at $12,672.
$14,400 per year on $120,000 in payroll is $6.92 per employee hour at 40 hours per week, 52 weeks. That's what needs to be in your loaded labor rate when you bid.
Pay-as-you-go workers' comp
One option worth knowing about: pay-as-you-go workers' comp lets you pay premiums based on actual payroll each pay period rather than a large upfront audit-based premium. For contractors whose workload fluctuates seasonally, this can help cash flow significantly. Several insurers offer it and it's worth asking for when you shop.
How to shop for it
Get quotes from at least three sources. An independent insurance agent who works with contractors is the most efficient path — they can shop multiple carriers and know which ones are favorable for your trade. The price difference between carriers for the same coverage can be substantial.
Key things to confirm: the classification codes they're using are correct for your work (misclassification goes both ways — you don't want to overpay for a higher-risk code than you're actually working in), and what the audit process looks like at year end.
The bottom line on cost
Workers' comp isn't a cost you absorb. It's a cost of labor, same as wages. Calculate your workers' comp rate per hour, add it to your loaded labor rate, and bid accordingly. It's not optional, it's not negotiable, and it's not coming out of your margin.
If your bids feel high because of the real cost of labor, the answer is better clients and better jobs — not skipping the insurance that protects your guys when something goes wrong.
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I'm not an insurance agent and this isn't professional insurance advice. Talk to a licensed agent for guidance specific to your state and situation.