Fixed-Price vs. Cost-Plus Remodeling Contracts: Which One Protects You?
Straight answers about how professional remodeling actually works — from a Fort Worth general contractor with 500+ projects since 2009.
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Both contract types can protect you if the terms are clear and what you’re getting is written and approved — but they’re not equal. A fixed-price contract with a clear scope actually protects both parties more than cost-plus: it’s designed to be a firm agreement, where cost-plus has more room to fluctuate and puts more responsibility on you.
How each contract works
A fixed-price contract states one number for a defined scope: the contractor absorbs estimating risk, and the price changes only through change orders you approve in writing. A cost-plus contract bills you the actual cost of labor and materials plus the contractor’s fee (a percentage or fixed markup). Cost-plus is more transparent in the sense that you see every invoice — but that transparency comes with the budget risk living on your side of the table.
Why cost-plus can cost you more
Cost-plus shifts responsibility toward the client: overruns, inefficiencies, and price increases all pass through to you, and a percentage fee means the contractor’s compensation grows when costs do. It has legitimate uses — genuinely undefined scopes, discovery-heavy work on older homes — but for a normal remodel it converts “what will this cost?” into a question answered only when the project ends. A fixed price answers it before demo day.
What makes a fixed-price contract actually protective
The protection is in the paperwork quality, not just the label: a detailed scope of work, itemized selections (the fruit of a real design phase), a payment schedule tied to milestones, and documented change orders for anything that shifts. That structure protects the contractor too — which is why it holds up. It’s how Birdseye has contracted 500+ projects since 2009: design and selections first, one firm number, and every change signed before it’s built.
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Frequently Asked Questions
Why do remodeling estimates vary so much between contractors?
They're rarely pricing the same thing — different assumed scopes, allowance games, and contract structures. Comparing bids only works when each is a fixed price on an identical written scope.
Can a fixed-price contract still change?
Only through change orders you approve in writing — a scope change you request, or a genuine hidden condition. The base price is firm; changes are documented, priced, and signed.
Is cost-plus ever the right choice?
Occasionally — for truly undefined scopes where no one can responsibly fix a price yet. Even then, insist on caps, full invoice access, and a defined fee.
What should the payment schedule look like?
Payments tied to completed milestones, spelled out in the contract. Be wary of large upfront demands — that's one of the classic warning signs of a bad contractor.
Let’s price your project
A free walkthrough and a fixed-price scope for your exact project — no pressure, no guesswork. Serving Haslet, North Fort Worth, Northlake, Westlake, Justin, Roanoke, Keller, Southlake, Trophy Club, Colleyville, and North Richland Hills.
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