Past performance is one of the highest-weighted evaluation factors in most federal procurements — often 25-40% of the total score, sometimes more. And the system that the federal government uses to track and report on contractor past performance is CPARS: the Contractor Performance Assessment Reporting System.
If you don't understand how CPARS works, you're competing blind. This guide walks through the CPARS process, the rating scale, what evaluators are actually looking at when they review your past performance, and how to use CPARS strategically to win more federal contracts.
What is CPARS?
CPARS is the federal government's official system of record for contractor performance evaluations on contracts of $35,000 or more (or $1M+ for performance-based service contracts, with some variation by contract type). Required under FAR 42.15, every federal contracting officer must complete a performance evaluation for each ratable contract action — and that evaluation feeds directly into the system that future evaluators use to assess your past performance.
Once finalized, CPARS records are accessible to federal contracting officers government-wide through the Past Performance Information Retrieval System (PPIRS), which has been integrated into CPARS since 2019. When you submit past performance references on a future proposal, evaluators verify your assertions against your CPARS record.
The CPARS rating scale
| Rating | Meaning | Practical Effect |
|---|---|---|
| Exceptional | Performance meets contractual requirements and exceeds many to the government's benefit | Strong differentiator on future bids |
| Very Good | Performance meets contractual requirements and exceeds some | Competitive past performance |
| Satisfactory | Performance meets contractual requirements | Acceptable but undifferentiated |
| Marginal | Performance does not meet some requirements | Significant risk flag |
| Unsatisfactory | Performance does not meet most requirements and recovery is unlikely | Effectively blocks most future bids |
Ratings are issued for each of five evaluation areas: Quality, Schedule, Cost Control (where applicable), Management, and Small Business Subcontracting (where applicable). Plus a rollup rating for Regulatory Compliance and an overall rating.
The CPARS process
The CPARS evaluation process follows a specific cadence:
- Annual evaluations are required for every ratable contract action with a period of performance of more than 12 months. Multi-year contracts get one CPARS per year.
- Final evaluations are required at the close of the contract or final task order.
- The CO drafts the evaluation based on input from the program office, technical representatives, and contracting team.
- The contractor receives the draft via the CPARS system and has 14 days to review and respond. The contractor can: agree, disagree with comments, or request reconsideration.
- The CO either accepts the contractor comments and revises the rating, or stands by the original rating with documented response.
- If unresolved, the matter goes to the Reviewing Official — typically one level above the CO — for final adjudication.
- The evaluation is finalized and becomes part of the permanent CPARS record.
Why most contractors handle CPARS poorly
Three patterns we see repeatedly:
1. Treating CPARS as a reporting requirement, not a strategic asset. Many contractors let the 14-day comment window expire without responding, accepting whatever rating the CO drafted. A "Satisfactory" rating you didn't push back on stays "Satisfactory" forever — even if your team's actual performance was Very Good or Exceptional.
2. Engaging only at evaluation time. By the time you receive a draft CPARS, the rating is largely formed. The work to influence your rating happened during contract performance — through proactive customer communication, documented quality, and visible value-add. If you only think about CPARS at the 14-day comment period, you've missed the opportunity to shape the rating.
3. Underestimating the cumulative cost of "Satisfactory." A wall of "Satisfactory" ratings tells evaluators on future opportunities that you're competent but undifferentiated. On price-driven evaluations that may be enough; on best-value evaluations where past performance is heavily weighted, you'll lose to firms with "Very Good" and "Exceptional" records.
How CPARS gets used in source selection
When you submit a proposal and list past performance references, evaluators do three things:
- Verify recency and relevance. Was the contract within the relevance window (typically 3-5 years)? Is the work scope sufficiently similar to the new requirement?
- Pull CPARS reports to verify your stated performance and look for any negative ratings or concerns.
- Assess past performance confidence on a scale tied to the solicitation's evaluation criteria — typically Substantial Confidence, Satisfactory Confidence, Limited Confidence, or No Confidence.
The math gets uncomfortable: if your strongest past performance reference has an Exceptional CPARS but the work was four years ago and only marginally relevant, evaluators may discount it. If your most relevant work has only Satisfactory ratings, your past performance score will land in the middle of the pack.
The relevance test: dollar value, scope, complexity
Most past performance evaluations apply a relevance test along three dimensions:
- Magnitude (dollar value): Was the prior contract similar in size to the new opportunity? A $2M past performance reference is weak support for a $25M opportunity.
- Scope: Were the services performed similar to those required? Generic "IT support" experience is weaker than "cloud migration to AWS GovCloud" experience for a cloud migration opportunity.
- Complexity: Was the work performed at similar complexity? A 12-person task order is not equivalent to a 200-person program.
Evaluators assess each reference against these dimensions to determine relevance. Highly relevant references with strong CPARS ratings are the best possible past performance. Highly relevant references with mediocre ratings can hurt you. Loosely relevant references with strong ratings can help — but won't carry as much weight.
Building a CPARS strategy
1. Identify your three highest-leverage contracts
Not all contracts produce equally valuable CPARS. Your three highest-leverage contracts are typically: your largest active contract, your most strategic agency relationship, and the contract whose scope most closely matches your future pipeline. These three deserve disproportionate attention to CPARS performance — proactive customer engagement, visible value delivery, and structured monthly reviews tracking the metrics evaluators will rate.
2. Run a quarterly performance review with the customer
The single most effective CPARS strategy is to make the rating a non-event. Quarterly reviews with the program manager and CO that surface concerns, document achievements, and align on performance expectations mean that when CPARS time comes, both sides have already agreed on the rating in substance.
3. Push back on weak ratings during the comment window
The 14-day contractor response window is your only formal opportunity to shape the rating. If your team performed at "Very Good" level but the draft is "Satisfactory," submit specific, fact-based comments documenting the performance the rating misses. COs often agree to upgrade ratings when contractors provide substantive evidence — they don't have time or incentive to write Exceptional narratives unless you give them the data.
4. Use CPARS as a hiring and retention tool
Strong CPARS records are evidence of a high-performing program. When you're recruiting program managers and senior personnel for new pursuits, your CPARS history is a credibility asset — if you have the documentation to share. Make CPARS narratives part of how you tell your firm's story.
How to use CPARS competitively in your proposals
When you cite a past performance reference in a proposal, the strongest move is to include the CPARS narrative or quote a specific evaluator comment. "Per our CPARS evaluation for Contract XYZ-12345 dated March 2025, the COR rated our quality 'Exceptional' and noted that 'the contractor consistently delivered ahead of schedule with zero quality discrepancies.'" This is dramatically more credible than the same content paraphrased.
For the proposal mechanics around past performance, see our government proposal compliance matrix template and our forthcoming guide on writing past performance reference forms.
Common CPARS pitfalls
Subcontractor CPARS: If you're a subcontractor, you don't get a CPARS in your own name — the prime does. To document your subcontract past performance for future bids, you need a Past Performance Questionnaire (PPQ) signed by the prime or government customer.
Disputed CPARS: A disputed rating that's never resolved stays in the system as "Pending" — and many evaluators interpret "Pending" as code for "there's a problem here." If you formally dispute a rating, follow through to resolution.
Contract closeout delays: CPARS is required at contract closeout. If your contract has been complete for 18 months and the final CPARS hasn't been issued, work with the CO to push it through. Open closeouts hurt both sides.
Bottom line
CPARS is not a passive reporting system — it's the most important reputational asset your firm has in federal contracting. Strong CPARS records compound: each new "Very Good" or "Exceptional" rating makes the next bid easier to win, which produces more strong CPARS, which makes the next bid easier still. Weak CPARS records compound the other direction.
Treat your CPARS portfolio like the strategic asset it is: monitor active contracts proactively, engage during the comment window, and use the resulting record aggressively in your future proposals.