In design and engineering, a small error can carry a big financial consequence, which is why clients and contracts almost always expect you to be insured. If you practice for clients in Colorado, professional liability is your priority.
What professional liability (E&O) covers
E&O covers you when a client says your professional work caused a financial loss, even when you followed good practice:
- A design or calculation is blamed for a costly rework or delay.
- A client says a specification did not meet requirements.
- A project outcome falls short of what the client expected, and they seek damages.
General liability will not cover these, because they are about your professional judgment. E&O handles legal defense and covered claims, which matters given how large design and engineering claims can be.
What about general liability?
General liability covers injury or property damage: a visitor hurt at your office, or damage during a site visit. Many contracts require it alongside E&O, so design firms often carry both. Bundling can lower your total.
What insurance costs for architects and engineers in Colorado
Two things set your premium: the state you work in and the risk your trade carries. In Colorado, Insureon’s customers pay a median of $54 a month for general liability, well above the $45 national median. Design work carries the highest professional-liability exposure of any small-business trade, because a drawing error can cost a client a construction budget. The ranges below start from Insureon’s national medians for small businesses, since Insureon publishes none for architects and engineers specifically, and adjust them for Colorado (how we estimate).
| Coverage | Typical monthly | Typical annual | What it covers |
|---|---|---|---|
| Professional liability (E&O) | $90–$180/mo | $1,080–$2,160/yr | Claims that your work or advice cost a client money. Also called errors & omissions. |
| General liability ($1M per occurrence) | $36–$72/mo | $432–$864/yr | Third-party injury and property damage. Usually the coverage a client, landlord, or license asks for by name. |
| Business owner’s policy (BOP) | $60–$120/mo | $720–$1,440/yr | General liability and commercial property bundled, usually with business-interruption cover. Cheaper than buying both separately. |
| Hiscox advertised starting price | from $22.50/mo | from $270/yr | E&O from $22.50, general liability from about $29, a BOP from about $42. |
Estimates from Insureon’s national medians for small businesses, adjusted for Colorado, at standard limits for a business of two to five people. Not quotes: your insurer prices your specific business. Hiscox writes coverage in 49 states plus Washington DC (not Alaska).
See these costs for your own business size, revenue and state
For the national picture, see our guides to how much small business insurance costs, the average cost of general liability insurance, the average cost of professional liability (E&O) insurance, and the average BOP insurance cost. Comparing states? Average business insurance cost by state puts Colorado next to the other 49. Not sure which policy you actually need? General liability vs professional liability vs BOP compares what each one covers and who needs it first.
Frequently asked questions
How much does insurance cost for architects and engineers in Colorado?
Architects and engineers in Colorado generally pay about $36–$72 a month for general liability and $90–$180 a month for professional liability (E&O). A business owner’s policy, which bundles general liability with property cover, runs about $60–$120.
Is business insurance more expensive in Colorado?
Insureon’s customers in Colorado pay a median of $54 a month for general liability, well above the $45 national median. Litigation climate, weather and catastrophe exposure, and local medical and repair costs are what move a state off the national $45 general liability and $83 BOP averages. Your trade, revenue, limits, and claims history then set your own number.
Do architects and engineers in Colorado need professional liability insurance?
Almost always. Clients and contracts routinely require E&O, because design and engineering errors can carry large financial consequences.
Does general liability cover a design error?
No. A design or calculation error is a professional liability claim, which is what E&O is for.
Do I need both E&O and general liability?
Many design and engineering contracts require both, so firms commonly carry the two together and bundle to save.
Get a real price
These figures are estimates. Only an insurer can give you a real price.
Direct online insurer
Fill in a form and see a price on screen. Best for simple businesses.
Example: Hiscox. Rated A (Excellent) by AM Best. Sold in 49 states and DC.
Hiscox pays us when you get a quote. It does not change your price.
Online broker or marketplace
One form, several insurers compared. Best if you want more than one price.
Local independent agent
Talk it through by phone or in person. Best for higher-risk businesses.
Find an independent agent near you (free directory, no payment to us)
Disclaimer: Informational only, not insurance advice or a substitute for a licensed agent. Coverage descriptions are summaries; policy terms govern. Availability and pricing vary by state and business, and prices are illustrative. Hiscox is available in 49 states and DC, not Alaska.