FAR 17.204—Contracts.
Plain-English Summary
FAR 17.204 explains how a contract must be written when it includes options or other extensions of performance. It covers the required limits on additional supplies or services and on the overall contract term, the required option exercise period, the need to give the contractor adequate lead time for continuous production, and the special rule allowing the option exercise period to extend beyond the contract completion date for service contracts when funding timing requires it. It also sets the general five-year ceiling for services and supplies, identifies the information technology contract exception, and notes that other statutes may impose shorter or different limits. Finally, it tells agencies how options may be structured for increased quantities and how extensions of contract term may be expressed in the contract. In practice, this section is about drafting option language correctly so the Government preserves flexibility without creating an unenforceable or overlong contract structure.
Key Rules
State clear contract limits
The contract must specify the limits on purchasing additional supplies or services, or the overall duration of the contract term, including any extension. This ensures the option structure is defined in the contract itself rather than left open-ended.
Set the option exercise period
The contract must state the period within which the option may be exercised. That period must be long enough to give the contractor adequate lead time to maintain continuous production or performance.
Allow service-contract timing flexibility
For service contracts, the option exercise period may extend beyond the contract completion date when needed because exercising the option would obligate funds not available in the fiscal year in which the contract would otherwise end. This accommodates funding and continuity issues for services.
Observe the five-year general limit
Unless approved under agency procedures, the combined basic and option periods may not exceed five years for services, and the combined basic and option quantities may not exceed the requirement for five years for supplies. These limits do not apply to information technology contracts.
Watch for other statutory limits
Other laws may impose additional restrictions on contract length for certain types of contracts, such as the Service Contract Labor Standards statute. The FAR limit is not the only limit that may apply.
Use permitted quantity option formats
Options for increased quantities of supplies or services may be written as a percentage of specific line items, an increase in specific line items, or additional numbered line items identified as the option. The contract should use one of these recognized structures.
Use permitted term-extension formats
Extensions of the contract term may be expressed either as an amended completion date or as additional performance time, such as days, weeks, or months. The contract may use whichever format best fits the requirement.
Responsibilities
Contracting Officer
Draft the contract so it clearly states the option limits, the option exercise period, and the form of any quantity increases or term extensions. Ensure the option period gives adequate lead time, confirm the total period or quantity stays within the applicable limits, and check for any additional statutory restrictions or agency approval requirements.
Agency
Establish procedures for approving exceptions to the general five-year limits where permitted. Ensure contracting personnel apply any special statutory restrictions that may shorten or otherwise affect contract duration.
Contractor
Review the contract option terms to understand the maximum quantities, maximum duration, and the time window during which the Government may exercise the option. Plan production, staffing, and pricing around the stated lead time and the possibility of extension.
Practical Implications
This section matters most when drafting or reviewing option clauses, because vague or overbroad option language can create performance and funding problems later.
A common pitfall is failing to align the option exercise period with the contractor’s lead time needs, which can disrupt continuity of supply or service.
Another frequent issue is overlooking the five-year cap or a separate statutory limit that applies to the specific contract type, especially for service contracts.
For service contracts, the ability to extend the option exercise period beyond the completion date can be important for funding timing, but it must still be written correctly in the contract.
Contractors should pay close attention to how options are expressed—percentages, line-item increases, or added line items—because that structure affects pricing, scope, and administration.
Official Regulatory Text
(a) The contract shall specify limits on the purchase of additional supplies or services, or the overall duration of the term of the contract, including any extension. (b) The contract shall state the period within which the option may be exercised. (c) The period shall be set so as to provide the contractor adequate lead time to ensure continuous production. (d) The period may extend beyond the contract completion date for service contracts. This is necessary for situations when exercise of the option would result in the obligation of funds that are not available in the fiscal year in which the contract would otherwise be completed. (e) Unless otherwise approved in accordance with agency procedures, the total of the basic and option periods shall not exceed 5 years in the case of services, and the total of the basic and option quantities shall not exceed the requirement for 5 years in the case of supplies. These limitations do not apply to information technology contracts. However, statutes applicable to various classes of contracts, for example, the Service Contract Labor Standards statute (see 22.1002-1 ), may place additional restrictions on the length of contracts. (f) Contracts may express options for increased quantities of supplies or services in terms of- (1) Percentage of specific line items, (2) Increase in specific line items; or (3) Additional numbered line items identified as the option. (g) Contracts may express extensions of the term of the contract as an amended completion date or as additional time for performance; e.g., days, weeks, or months.