FAR 52.232-10—Payments under Fixed-Price Architect-Engineer Contracts.
Plain-English Summary
FAR 52.232-10 sets the payment mechanics for fixed-price architect-engineer (A-E) contracts. It covers how the contractor must prepare monthly estimates of work performed, what supporting data may be required, how the Government reviews and pays substantiated vouchers, when and why the contracting officer may withhold up to 10 percent, when withheld amounts must be released, how final payment works after satisfactory completion and final acceptance, and the contractor’s obligation to sign a release of claims before final payment or termination settlement. It also adds a special limitation for undefinitized contract actions, capping progress payments at 80 percent of work accomplished despite any other clause language. In practice, this clause is designed to protect the Government while still providing a predictable monthly payment process for A-E services, where performance is often measured by completed design work, studies, reports, or other professional services rather than delivered physical items. It matters because payment depends not just on invoicing, but on substantiation, quality, contract completion status, and the contracting officer’s judgment about risk and satisfactory performance.
Key Rules
Monthly estimates required
The contractor must prepare monthly estimates of the amount and value of work and services performed that meet the contract’s quality standards. Those estimates, together with any supporting data the contracting officer requires, must be submitted with the voucher.
Payment follows substantiated vouchers
After receiving a substantiated voucher, the Government must pay the approved amount as approved by the contracting officer or an authorized representative. Payment is therefore tied to both proper documentation and Government approval.
Withholding is discretionary and limited
The contracting officer may require withholding of up to 10 percent from amounts due under paragraph (a), but only if necessary to protect the Government’s interest and ensure satisfactory completion. The amount withheld must be based on the contractor’s performance record under the contract.
Release excess retention when appropriate
When the contracting officer determines the work is substantially complete and the retained amount exceeds what is needed to protect the Government, the excess must be released to the contractor. Retention is not meant to continue once the risk justifying it has passed.
Final payment after completion and acceptance
After satisfactory completion and final acceptance of all work under the Statement of Architect-Engineer Services, the contractor is entitled to the unpaid balance, including all withheld amounts. Final payment depends on completion and acceptance, not merely on submission of a final invoice.
Release of claims is a condition precedent
Before final payment or termination settlement, the contractor must execute and deliver a release of all claims arising under the contract, except claims specifically reserved in the release with stated amounts. This protects the Government from later disputes over settled work.
Undefinitized actions capped at 80 percent
For undefinitized contract actions, progress payments may not exceed 80 percent of work accomplished, regardless of other clause provisions, including the withholding language. This special cap applies until the action is definitized.
Contract action definition matters
The clause defines a contract action broadly to include actions resulting in a contract, including modifications for additional supplies or services, but excludes within-scope changes and administrative changes. This definition helps determine when the 80 percent cap applies.
Responsibilities
Contractor
Prepare accurate monthly estimates of work performed, include required supporting data, submit substantiated vouchers, and ensure the work claimed meets contract quality standards. The contractor must also execute and deliver a release of claims before final payment or termination settlement, except for specifically reserved claims stated in the release.
Contracting Officer
Review and approve substantiated vouchers, determine whether withholding is necessary and how much to withhold up to the 10 percent limit, base withholding on the contractor’s performance record, and release excess retained amounts when the work is substantially complete. The contracting officer must also confirm satisfactory completion and final acceptance before final payment and ensure the release of claims is obtained.
Authorized Representative
Approve vouchers when delegated authority exists and support the contracting officer’s payment administration responsibilities within the scope of that delegation.
Government
Pay approved substantiated vouchers, retain only the amount justified to protect its interest, release excess retention when warranted, and make final payment only after completion, acceptance, and receipt of the required release of claims.
Practical Implications
Contractors should treat the monthly estimate as a substantiation package, not just an invoice; weak backup can delay payment even on a fixed-price A-E contract.
The 10 percent withholding is not automatic. Contracting officers must justify it based on protection of the Government’s interest and the contractor’s performance record, so contractors should monitor whether retention remains reasonable as work progresses.
Once the project is substantially complete, continued retention above the amount needed for protection should be released. Contractors should ask for a review if retention appears excessive.
Final payment can be delayed if the contractor has not provided a proper release of claims or if the release does not clearly reserve specific claims with stated amounts.
The 80 percent cap on undefinitized contract actions can override normal progress payment expectations, so both parties should identify early whether the action is undefinitized and whether the cap applies to the work being billed.
Official Regulatory Text
As prescribed in 32.111 (c)(1) , insert the following clause: Payments under Fixed-Price Architect-Engineer Contracts (Apr 2010) (a) Estimates shall be made monthly of the amount and value of the work and services performed by the Contractor under this contract which meet the standards of quality established under this contract. The estimates, along with any supporting data required by the Contracting Officer, shall be prepared by the Contractor and submitted along with its voucher. (b) After receipt of each substantiated voucher, the Government shall pay the voucher as approved by the Contracting Officer or authorized representative. The Contracting Officer shall require a withholding from amounts due under paragraph (a) of this clause of up to 10 percent only if the Contracting Officer determines that such a withholding is necessary to protect the Government’s interest and ensure satisfactory completion of the contract. The amount withheld shall be determined based upon the Contractor’s performance record under this contract. Whenever the Contracting Officer determines that the work is substantially complete and that the amount retained is in excess of the amount adequate for the protection of the Government, the Contracting Officer shall release the excess amount to the Contractor. (c) Upon satisfactory completion by the Contractor and final acceptance by the Contracting Officer of all the work done by the Contractor under the "Statement of Architect-Engineer Services", the Contractor will be paid the unpaid balance of any money due for work under the statement, including all withheld amounts. (d) Before final payment under the contract, or before settlement upon termination of the contract, and as a condition precedent thereto, the Contractor shall execute and deliver to the Contracting Officer a release of all claims against the Government arising under or by virtue of this contract, other than any claims that are specifically excepted by the Contractor from the operation of the release in amounts stated in the release. (e) Notwithstanding any other provision in this contract, and specifically paragraph (b) of this clause, progress payments shall not exceed 80 percent on work accomplished on undefinitized contract actions. A "contract action" is any action resulting in a contract, as defined in FAR subpart 2.1 , including contract modifications for additional supplies or services, but not including contract modifications that are within the scope and under the terms of the contract, such as contract modifications issued pursuant to the Changes clause, or funding and other administrative changes. (End of clause)