Overview
Construction contracts define how a contractor will be paid and what work will be delivered. They set the scope, schedule, payment method, and quality expectations for a project, and they often allocate risk between the owner and the contractor.
Common contract formats include fixed-price agreements, cost-reimbursable arrangements, and time-and-materials deals, each with different implications for budgeting, change orders, and project management.
If a project requires additional financial assurances, owners may ask for bonds to guarantee performance or payment; for more on that option see Contract (Construction) Bonds.
Key takeaways
- Choose the contract type that matches how well the project scope and schedule are defined.
- Fixed-price contracts shift pricing risk to the contractor; cost-plus and time-and-materials shift more cost risk to the owner.
- Clarify how changes, delays, and quality issues will be handled before work begins.
How it works
Fixed-price (lump sum) contracts set one total payment for the defined work, and they typically include milestones, completion dates, and provisions for incentives or liquidated damages if deadlines are missed.
Cost-plus contracts reimburse actual costs plus a negotiated fee or percentage; they require detailed cost tracking and clear definitions of direct versus indirect expenses.
Time-and-materials agreements pay hourly or daily rates plus materials and are useful when the scope is uncertain, but owners should agree on caps or review processes to control costs.
When a contract requires a formal guarantee of performance, owners commonly require surety bonds; contractors can learn more about bonding options at Contract Surety Bonds.
What it may cover (and what it may not)
A construction contract governs payment terms, the work to be performed, schedules, warranties, and remedies for breach. Typical coverage or provisions include:
- Scope of work and specifications.
- Payment schedule and retainage terms.
- Change order procedures and approval requirements.
- Warranties and defect correction obligations.
What a contract usually does not cover unless explicitly stated includes separate insurance requirements, third-party property damage beyond specified limits, and issues arising from noncompliance with permits or regulations.
Common mistakes to avoid
Failing to define the scope clearly is one of the most common problems; vague scopes lead to disputes over extra work and cost. Always attach drawings, specifications, and a detailed scope to the contract.
Not specifying change-order procedures or rates for additional work can leave both parties exposed; include an approval process and pricing method for changes.
Ignoring insurance, bonding, and indemnity clauses can create unexpected liability; review these provisions carefully and coordinate them with your insurance broker.
Questions to ask an agent
Which types of insurance and bonding are recommended for this contract and project size?
How do the contract's indemnity and additional-insured requirements affect my current policies?
What documentation will an insurer or surety require if a claim or bond call arises during or after the job?
Next steps
Before signing, walk through the contract with your project manager and your insurance advisor to confirm scope, schedule, payment terms, and risk allocation.
If you have specialty exposures—such as work involving pumping operations—consider reviewing options for Contract Pumpers Insurance to ensure those risks are addressed.
To get coverage quotes or to review contract language with a broker, ask an agent about tailored policies and bonding requirements.
Frequently Asked Questions
What is the main difference between a lump-sum and a cost-plus contract?
A lump-sum contract sets a fixed total price for defined work, while a cost-plus contract reimburses actual costs plus an agreed fee or percentage.
When should I expect a project owner to require a performance bond?
Owners often require performance bonds on public projects or larger private jobs to ensure the contractor completes the work per contract terms.
Can I insure against cost overruns on a fixed-price contract?
Insurance does not typically cover normal cost overruns; contractors manage that risk through pricing, contingencies, and contract clauses.
How do change orders affect payments and schedules?
Change orders should specify price adjustments and time extensions; without clear procedures, changes can cause payment disputes and delays.