Missouri Plumbing Contractor Insurance and Bonds
Three Financial Requirements, All Local
Every Missouri jurisdiction that issues plumbing contractor licenses requires some combination of surety bonds, general liability insurance, and workers' compensation coverage. The specifics — dollar amounts, who gets named on the certificate, whether the municipality appears as obligee or additional insured — change from one jurisdiction to the next.
Surety Bonds
A compliance or license bond protects the local jurisdiction against financial loss from code violations or incomplete work. Under RSMo § 341.200, the bond must be signed by a licensed corporate surety and approved by the county counselor or city attorney.
Bond amounts by jurisdiction:
| Jurisdiction | Bond Amount |
|---|---|
| St. Louis County | $10,000 |
| Jefferson City | $5,000 |
| Columbia | $10,000 |
| St. Charles County | $10,000 |
| St. Charles City | $10,000 |
| Jefferson County | $25,000 |
Kansas City handles contractor compliance through its business licensing process rather than requiring a traditional surety bond.
The bond names the local political subdivision as the sole obligee. If you operate in three jurisdictions that require bonds, you need a separate bond for each. Your bond agent needs the principal's name and DBA formatted exactly as they appear on the contractor license application — formatting mismatches cause delays at the permit counter.
General Liability Insurance
Commercial general liability (CGL) coverage is required everywhere. Minimums depend on the jurisdiction:
- $500,000 per occurrence: St. Charles County, St. Louis County, St. Charles City
- $1,000,000 per occurrence: Kansas City, Springfield
Kansas City and Springfield require the city to be named as an "Additional Insured" on the Certificate of Insurance. St. Charles County requires the county to be listed as certificate holder. Verify the exact naming language with the building department before your agent issues the certificate — a COI that lists "St. Charles County" when the department wants "St. Charles County Division of Building and Code Enforcement" gets bounced back.
When expanding into a new jurisdiction, check whether your existing CGL policy meets the target area's liability limits. Upgrading from $500,000 to $1,000,000 coverage is a policy change your insurer handles, but it may affect your premium.
Free Download
Get the Missouri — Plumber License Path Checklist
Everything in this article as a printable checklist — plus action plans and reference guides you can start using today.
Workers' Compensation
RSMo Chapter 287 requires workers' compensation for general businesses with five or more employees. But Missouri applies a stricter standard to the construction industry: any contractor with one or more employees (excluding the business owner) must carry workers' comp.
Sole proprietors with no employees must submit the notarized exemption statement developed by the Missouri Division of Workers' Compensation; confirm with the local building department where it must be filed before you apply for a contractor license.
This is the requirement that catches solo operators off guard. If you hire a single helper — even part-time — you need active workers' comp coverage before that person starts work.
What It Costs
| Coverage Type | Typical Annual Cost Range |
|---|---|
| Surety bond ($5,000–$25,000 face) | $100–$500/year |
| General liability ($500K–$1M) | $800–$3,000/year |
| Workers' comp (per employee) | Varies by payroll and class code |
Bond premiums depend on your credit score and the bond amount. General liability premiums reflect your claims history, project types, and revenue. Workers' comp is calculated as a percentage of payroll tied to your NCCI class code for plumbing work.
Keeping Everything Current
Required bonds and insurance must stay active for the duration of your contractor license. A lapse can affect your license status or renewal — St. Charles County's biennial renewal requires updated bond and insurance certificates before they process the renewal payment. Set calendar reminders 60 days before each policy renewal to prevent coverage gaps.
The Missouri Plumber License Guide includes a jurisdiction-by-jurisdiction bond and insurance checklist with the exact naming conventions each building department expects on certificates.
Get Your Free Missouri — Plumber License Path Checklist
Download the Missouri — Plumber License Path Checklist — a printable guide with checklists, scripts, and action plans you can start using today.