Concrete crews work with heavy equipment, formwork and silica dust, so safety documentation matters as much as insurance.
General liability and workers’ compensation at the limits your contract or owner requires, plus auto liability when the sub drives to site. Many GCs also ask for additional insured, waiver of subrogation, and primary & non-contributory endorsements.
A written safety program (often including silica exposure control) and OSHA training records.
For 1099 reporting before the first payment.
Some states and cities require a contractor license for concrete work. Licensing rules are set by each state, and sometimes by the county or city, so check what applies where the job is.
Often requested for larger or commercial jobs, or before a first job with a new sub.
On public or bonded jobs, a bonding capacity letter and performance and payment bonds may be required, as the contract specifies.
Requirements vary by state, locality, owner and contract. This is a general starting point, not legal or insurance advice. Your contract and local rules decide what’s actually required.
SubSignoff records what documents say and whether they meet the requirements you set. It doesn’t confirm coverage with insurers or verify licenses with the state. Check licenses with the issuing agency; for some states SubSignoff links to the official lookup page.