Retainage Is the Buffer That Protects Owners - and Burdens Contractors - Throughout Construction
Retainage is the percentage of each payment application that the owner withholds from the contractor during construction, accumulating as a reserve fund against contractor default, incomplete work, or defective work. Standard retainage under AIA A101 is 10% of the value of work completed and stored materials, withheld from each payment application. On a $5 million project that is 50% complete, the owner might hold $250,000 in retainage while the contractor has effectively funded that amount from their own working capital. Retainage creates a financial incentive for the contractor to complete the work and address punch list items - the contractor cannot receive the retainage until substantial completion is certified and all punch list items are resolved. Understanding retainage is tested on the ARE PjM exam as part of project financial management and on the CE exam as part of payment certification procedures.
Retainage Calculation
Under a standard 10% retainage contract, if a contractor submits a payment application for $500,000 of work completed, the owner certifies and pays $450,000 ($500,000 minus 10% retainage = $50,000 withheld). The $50,000 accumulates in the owner's account (or in a joint escrow account, in some contracts). Over the life of a $5 million project, the accumulated retainage at the 10% rate is $500,000. Most AIA contracts allow reduction of retainage (from 10% to 5%) at 50% project completion, if the contractor is on schedule and the quality of work is satisfactory. This retainage reduction recognizes that the contractor's performance incentive does not need to be as strong once the project is substantially underway and the contractor's reliability has been demonstrated.
State Laws Limiting Retainage
Many states have enacted statutes that limit the maximum retainage that can be withheld on construction contracts - particularly public construction contracts. Some states cap retainage at 5% of the contract value; others require retainage to be reduced or eliminated once the project reaches a defined completion milestone. These laws reflect recognition that excessive retainage imposes working capital burdens on contractors and their subcontractors that can reduce competition, particularly for small contractors and minority-owned businesses. Architects working on public projects must be aware of applicable state retainage statutes and ensure that the contract documents comply.
Withholding Payment for Other Reasons
Retainage is distinct from other reasons an owner or architect might withhold payment certification. AIA A201 Article 9 lists specific grounds for the architect to withhold or nullify a Certificate for Payment: defective work not remedied; third-party claims filed; failure of the contractor to pay subcontractors or suppliers; reasonable evidence that the work cannot be completed within the remaining contract sum; persistent failure to carry out the work in accordance with the contract documents; and damage to the owner or another contractor. These withholdings are separate from routine retainage and require specific written justification from the architect.
Final Release of Retainage
Retainage is released at final payment, after the contractor has completed all punch list items, submitted all required closeout documentation (as-built drawings, O&M manuals, warranties, attic stock), and satisfied all conditions of final completion. The contractor's final payment application includes the accumulated retainage amount. The architect certifies final payment only after verifying that all conditions are satisfied. The final payment releases the contractor from most remaining contract obligations; receipt of final payment by the contractor constitutes a waiver of claims against the owner, except for those specifically identified in the final payment request.
Key Exam Points
- Retainage: percentage withheld from each pay application; standard 10%, may reduce to 5% at 50% completion.
- Purpose: protect owner against contractor default, incomplete, or defective work; incentivize completion.
- State laws may cap retainage, particularly on public projects.
- Retainage released at final payment after all closeout conditions satisfied.
- Withholding for other reasons (A201 Article 9) is separate from retainage and requires specific justification.
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