POP (Period of Performance)

The timeframe during which a contractor must complete the work specified in the contract.

Full Definition

The Period of Performance (POP) defines the specific start and end dates during which a contractor is authorized and obligated to perform the work specified in a government contract. The POP is structured as a base period followed by zero or more option periods that the government may exercise at its discretion under FAR 17.207. For service contracts, the base period is typically 12 months, with option periods of 12 months each, up to a total of five years (though some contracts extend longer). For supply contracts, the POP reflects the delivery schedule. Work performed outside the authorized POP is generally not billable and may constitute an unauthorized commitment requiring ratification under FAR 1.602-3. The contracting officer can extend the POP through a bilateral or unilateral contract modification, and contracts often include a FAR 52.217-8 clause allowing extensions of up to six months.

Why It Matters

Understanding POP structure is critical for accurate pricing, staffing plans, and contract management. When preparing proposals, account for transition-in and ramp-up time during the first 30-90 days of the base period — many contractors underestimate startup costs and delays. Price each option period separately with appropriate escalation factors for labor rates and materials. Remember that option periods are exercised at the government's sole discretion; never assume options will be exercised when forecasting revenue. If you are an incumbent contractor approaching the end of your POP, begin recompete preparation 12-18 months before expiration. For task order contracts under IDIQs, individual task orders have their own POPs that must fall within the overarching contract's ordering period. Track POP dates carefully to avoid performing unfunded work past the authorized period.

Example

A small business wins a software development contract with the Army structured as a one-year base period starting March 1, 2026, plus four one-year option periods. The base period POP runs through February 28, 2027. During the first 60 days, the contractor completes transition-in activities including obtaining facility access, network credentials, and knowledge transfer from the prior contractor. The government exercises Option Year 1 in January 2027, extending the POP through February 2028. The contractor prices each option year with a 3% labor rate escalation. In Year 3, the contracting officer uses the FAR 52.217-8 extension clause to add three months while a follow-on contract is being awarded.