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The work on the other side

Insurance costs for a new contractor

Compiled by the Sitonce editorial team from the PSI Candidate Information Bulletin, NASCLA's own published material and the federal standards named belowUpdated 2 min readFacts verified 4 September 2026
The short answer

Premiums are driven by payroll, revenue, trade classification, claims history and limits. A new company pays more because it has no history, and the fastest reductions come from classification accuracy and a clean record.

A cost that surprises new contractors, and one where a fair amount is within your control.

What drives the number

DriverEffect
Trade classificationRoofing and structural work rate far higher than interior finishes
Payroll and revenueMost policies rate on one or both, and audit at year end
Claims historyThe single largest lever over time
Limits and endorsementsHigher limits and additional insured requirements raise the premium
Years in businessA new entity has no record, and no record is priced as risk

Workers compensation and the experience modifier

Rated per classification of employee, then adjusted by a modifier reflecting your claims history against the average for your class.

A new company starts at the neutral figure. Claims push it up and a clean run pushes it down, and the effect compounds because it multiplies the whole premium.

Classification accuracy is worth checking

Employees misclassified into a higher-rated category cost real money every year. Reviewing the classifications on your policy against what people actually do is the least glamorous cost saving available and often the largest.

Why commercial costs more

Contract requirements. Commercial owners and general contractors demand higher limits, additional insured status, waivers of subrogation and primary and non-contributory wording, and every one of those adds premium.

Budgeting at the state license minimum and then reading a subcontract is how contractors discover this.

The audit

Most policies are audited at the end of the term against actual payroll and revenue. Underestimating at binding produces a bill later rather than a saving.

What reduces it

  • A documented safety program and a clean claims record
  • Accurate classifications, reviewed annually
  • Certificates collected from every subcontractor, so their exposure is not rated as yours
  • Time in business, which cannot be accelerated

Subcontractor certificates matter more than people expect. Uninsured subs get added to your payroll at audit.

Common questions

What drives contractor insurance costs?

Trade classification, payroll and revenue, claims history, limits required, and years in business.

Why does a new contractor pay more?

No claims history, and no record is priced as risk.

What is the experience modifier?

An adjustment to workers compensation reflecting your claims history against your class average. It multiplies the whole premium.

Why does commercial work cost more to insure?

Contracts demand higher limits, additional insured status, waivers of subrogation and specific wording.

What reduces the premium fastest?

Accurate classifications, a clean claims record, and collecting certificates from every subcontractor.