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Contracts & Legalaka: AIA documentsaka: AIA A201

AIA Contract

In Plain English

Standard construction contract forms published by the American Institute of Architects that are widely used in the industry.

Definition

AIA contracts are standardized construction contract documents developed and published by the American Institute of Architects, widely used throughout the United States construction industry. They include owner-contractor agreements, general conditions, and supplementary forms for various delivery methods. AIA contracts are regularly updated to reflect current industry practices and legal standards.

Why It Matters in Bidding

Because AIA contracts are pre-drafted and widely recognized, knowing their default terms lets estimators price risk accurately instead of guessing at payment, change-order, and indemnification provisions. The general conditions in A201 establish retainage, payment timing, and how disputes are handled, all of which affect a contractor's cash flow and the contingency it builds into a bid. Owners frequently attach supplementary conditions that modify the standard AIA language, so reading both is essential before committing to a price.

Example

The general contractor flagged that the owner's supplementary conditions increased retainage above the level the team assumed under AIA A201, prompting the estimator to add carrying cost into the bid markup.

Related Terms

ContractGeneral Conditions (Contract)Conditions of the ContractAIA Contract

Frequently Asked Questions

The contract sets payment timing, retainage percentage, change-order markup limits, and dispute procedures. Each of these affects cash flow and risk exposure, so a contractor reads the governing AIA documents and any supplementary conditions before bidding, then prices contingency and overhead to reflect terms that are less favorable than the standard.
The AIA revises its documents on roughly a ten-year cycle to reflect new delivery methods, court decisions, insurance practices, and technology like digital submittals. Using an outdated edition can create gaps with current law or industry norms, so parties should confirm the edition year referenced in the bid documents matches what they are agreeing to.
Yes. Owners and their attorneys routinely attach supplementary conditions that amend, delete, or add to the standard AIA provisions, particularly around indemnification, insurance, and payment. Bidders must read the base document together with these modifications, because the supplementary conditions usually control where they conflict with the standard text.

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