What is UST / AST Contractors (Bond)?
UST (Underground Storage Tank) and AST (Aboveground Storage Tank) contractor bonds are a type of surety bond often required for professionals who install, repair, or remove fuel storage tanks. These bonds help ensure contractors follow environmental regulations and safety standards and complete work according to state laws and industry best practices. They sit alongside other risk controls such as commercial liability, property coverage, equipment coverage, and commercial auto exposure to address pollution and cleanup exposures.
Who Needs It
Any contractor or operator who works with underground or aboveground storage tanks may need a UST/AST bond. This includes businesses involved in tank installation, removal, maintenance, or site remediation. Many licensing and permitting authorities expect bonded contractors; for details specific to this coverage see the UST / AST Contractors (Bond) storefront. Specialized drilling or extraction contractors should also review tailored products like Insurance for Drilling/UST and AST Contractors. Smaller operators and remediation firms also commonly combine bonding with liability and pollution policies to manage overlapping exposures.
What It Typically Covers
This bond protects the public and government agencies from financial loss when a contractor fails to meet legal or contractual obligations. Typical exposures covered include:
- Improper installation or removal of tanks
- Failure to comply with environmental regulations or required remediation
- Negligence that results in contamination, property damage, or third‑party claims
- Abandonment of a project without completion
Risk scenario: a leak discovered after tank removal that triggers regulatory cleanup and third‑party property remediation—costs the bond may be called to address. For broader environmental bonding options that may overlap with these needs, review Environmental Contractor Bonds.
Common Exclusions and Limitations
While the bond offers protection to the public and regulators, it doesn’t cover every risk. Common exclusions include intentional illegal acts or fraud, claims outside the bond’s written scope, and first‑party property losses not caused directly by the bonded contractor. Bonds also differ from liability policies and typically do not replace routine commercial general liability or equipment coverage; for overlap with liability policies see Contractors Professional Liability and General Liability Exclusions.
Factors That Influence Cost
Premiums and underwriting depend on several factors, including the bond amount required by the state or agency, the contractor’s credit history and financial strength, business experience and licensing record, and prior claims or violations. Underwriting factors and active risk management—documented safety programs, environmental controls, and clear remediation procedures—can meaningfully affect pricing. Insurers also consider related exposures such as commercial auto exposure and equipment coverage when evaluating overall risk.
Proof of Insurance & Compliance
Once issued, the bond serves as proof that the contractor meets bonding requirements for licensing or permitting. States vary in bond amounts, renewal terms, and acceptable surety providers, so confirm your jurisdiction’s standards. Contractors typically pair bonds with commercial liability and pollution policies to address overlapping exposures and demonstrate regulatory compliance.
How to Get a Quote
Getting a UST/AST contractor bond quote is straightforward. Start by providing basic business and licensing information, recent loss history, and details on operations and experience. Our team can help you find the right bond for your project and state requirements—Get a quote today.
Frequently Asked Questions
Is a UST/AST contractor bond the same as liability insurance?
No, a bond guarantees compliance and protects agencies or third parties for contractor defaults; liability insurance covers injuries or property damage from accidents.
How long does a UST/AST bond last?
Terms typically last one year but may vary based on contract, permitting, or state requirements.
Can the bond be canceled?
Yes—most surety bonds can be canceled with advance notice. Contractors may risk losing licenses or permits if a cancelled bond isn’t replaced.
What happens if a claim is made on my bond?
The surety investigates and may pay covered claims; the principal (contractor) is typically required to repay the surety for amounts paid.
Do all states require this bond?
No, requirements vary by state and local agency. Always check with your licensing authority to confirm obligations.
Still have questions? Talk to a local insurance expert.