Fixed-Price Contract

Definition

A fixed-price contract (also called a lump-sum contract) defines the total project cost at the outset based on an agreed scope of work. The contractor commits to deliver that scope for the agreed price. If material costs increase or work takes longer than estimated, those overruns are absorbed by the contractor, not passed to the homeowner, as long as the scope has not changed. Fixed-price contracts provide budget certainty for homeowners. They require the contractor to invest in thorough pre-construction planning and accurate pricing. They contrast with cost-plus contracts, where the homeowner pays actual costs plus a markup with no guaranteed final price.

Frequently Asked Questions

What is the difference between a fixed-price and cost-plus contract?

A fixed-price contract establishes the total project cost in advance; the contractor bears overrun risk within the agreed scope. A cost-plus contract bills the homeowner for actual costs plus a markup, the final price is only known when the project ends. Fixed-price gives homeowners budget certainty; cost-plus shifts financial risk to the homeowner. For Long Island projects involving significant structural or permit complexity, fixed-price contracts offer substantially stronger financial protection.

Does a fixed-price contract mean I cannot make changes during construction?

You can make changes, managed through a formal written change order process that documents the new scope and adjusts the contract price. Changes made during construction are generally more expensive than the same decision made during pre-construction, which is why completing all design decisions and material selections before the contract is signed produces the most accurate and stable fixed price.

What if material prices increase after the fixed-price contract is signed?

Under a fixed-price contract, the contractor absorbs material cost increases within the original scope unless the contract contains specific, disclosed escalation clauses. Review any escalation provisions carefully before signing. This price risk protection is one of the primary benefits of fixed-price contracting for homeowners, and one of the primary reasons fixed-price contractors invest heavily in pre-construction cost verification.

Why Fixed-Price Contract Matters

Budget certainty is the most frequently cited priority for Long Island homeowners considering a major renovation. Cost-plus contracts expose homeowners to open-ended financial risk, the final price is unknown until the project is complete. Fixed-price contracts transfer that risk to the contractor, provided the scope is well-defined upfront. This is why fixed-price firms invest heavily in pre-construction: the completeness of the scope definition directly determines the reliability of the price.

How Center Island Contracting Company Uses It

Center Island Contracting delivers all projects under fixed-price agreements. Before a contract is signed, the team completes detailed scope of work, material specifications, and design documentation to ensure the price is accurate and defensible. All cost tracking and scope documentation is maintained in the Buildertrend platform, providing homeowners with transparent visibility into what was agreed and what is being built.