Two pricing tests run through every negotiated federal competition, and contractors lose money confusing them. One asks whether your price is too high. The other asks whether it is too low. Only the first applies to every source selection. The second — price realism — applies to a fixed-price buy only when the solicitation says so, and FAR 15.404-1, effective March 13, 2026 under FAC 2026-01, draws the line. Get this wrong and you either pad a bid nobody asked you to pad, or you file a protest the Government Accountability Office dismisses in a paragraph.

Background

FAR 15.404-1(a) states the goal plainly: "the objective of proposal analysis is to ensure that the final agreed-to price is fair and reasonable." That objective never switches off — it attaches to every contract type and every dollar value.

How the contracting officer reaches it depends on the data. Price analysis is used when certified cost or pricing data are not required. Cost analysis — evaluating individual cost elements — is used when certified cost or pricing data are required. FAR 15.404-1(b) defines price analysis as "the process of examining and evaluating a proposed price without evaluating its separate cost elements and proposed profit." The contracting officer does not open your build-up. They look at the number.

The regulation ranks the techniques. Preferred first: comparison of proposed prices received in response to the solicitation. Second: comparison to historical prices paid for the same or similar items. Below those sit parametric estimating methods, published price lists and market prices, independent government cost estimates, market research comparisons, and analysis of non-certified cost or pricing data.

In a competitive buy, your rivals' prices are the primary yardstick. Competition itself does most of the analytical work — FAR 15.305 puts it directly: "Normally, competition establishes price reasonableness," so on a firm-fixed-price basis, comparison of the proposed prices will usually satisfy the requirement to perform a price analysis. On a cost-reimbursement basis, evaluations "shall include a cost realism analysis to determine what the Government should realistically expect to pay for the proposed effort."

Key Details

Realism is a different animal. FAR 15.404-1(d) defines cost realism analysis as "the process of independently reviewing and evaluating specific elements of each offeror's proposed cost estimate to determine whether the estimated proposed cost elements are realistic" for the work, reflect a clear understanding of the requirements, and match the technical proposal. It shall be performed on cost-reimbursement contracts, where it produces a probable cost of performance that may differ from what you proposed. On competitive fixed-price incentive contracts or other competitive fixed-price-type contracts, it may be used — but only in exceptional circumstances, such as unclear new requirements, quality concerns, or a history of contractors failing to cover costs.

The shall/may split is the whole ballgame. On a cost-type contract, your proposed cost is an input, not the price. On a fixed-price contract, your price is the price — unless the solicitation buys itself the right to look deeper.

GAO tightened that condition in Absolute Strategic Technologies, LLC, B-424321.2; B-424321.3 (June 18, 2026), a challenge to the Air Force's Reliability and Maintainability Information System (REMIS) support services acquisition under solicitation No. FA8770-25-R-B006. The protest was denied in part and dismissed in part, and the dismissed part is the instructive one. Absent an express price realism provision, GAO concludes a solicitation contemplates a realism review only where two conditions both hold: the solicitation expressly states that the agency will review prices to determine whether they are so low as to reflect a lack of technical understanding, and the solicitation states that a proposal can be rejected for offering low prices.

Both prongs. Not one. And the consequence is symmetrical: "where a solicitation does not meet these requirements, agencies are neither required nor permitted to conduct a price realism analysis in evaluating fixed-price proposals." The realism challenge here was dismissed because the solicitation referenced cost realism only for the cost-plus-fixed-fee line items and made no reference to price realism for the firm-fixed-price ones. GAO's principle: offerors "must be given reasonable notice that submission of low pricing may reflect negatively on the agency's assessment of their understanding of the contract requirements or the risk associated with their proposals."

Pricing policy reinforces the restraint. FAR 15.402, also effective March 13, 2026, directs contracting officers to "purchase supplies and services from responsible sources at fair and reasonable prices," and sets an order of preference when certified cost or pricing data are not required. First, no additional data if the price is based on adequate price competition. Second, data other than certified cost or pricing data — catalog prices, sales history, and only such cost data as are necessary to determine a fair and reasonable price. Third, minimize what is requested, because "requesting unnecessary data can lead to increased proposal preparation costs."

One currency note. The Revolutionary FAR Overhaul rules published June 23, 2026 under Executive Order 14275 are proposed, with comments due July 23, 2026. They displace nothing yet: the FAC 2026-01 Part 15 text effective March 13, 2026 is the operative rule.

What It Means for Contractors

Read the pricing section before you build the model. Search the solicitation for the phrases "price realism," "lack of technical understanding," and "may be rejected." If the first phrase is absent from a fixed-price solicitation, you are being evaluated on reasonableness alone, and a defensible low price cannot be scored against you. If both prongs appear, your price now carries technical risk, and a thin bid needs a narrative — staffing basis, tooling, reuse — explaining why it is executable rather than optimistic.

Match the analysis to the contract type. On cost-reimbursement work, assume every rate and hour will be independently tested and probable cost adjusted upward if your build-up cannot survive scrutiny. Discounting labor rates there buys you nothing; the agency simply restores the cost it believes you will incur. On firm-fixed-price work in a real competition, your competitors set the reasonableness benchmark.

Do not volunteer cost data. FAR 15.402 tells contracting officers to ask for less, not more. If you attach a full cost build-up to a fixed-price proposal nobody requested, you hand the agency material for an analysis the solicitation never authorized.

Protest the right defect at the right time. If a fixed-price solicitation is silent on realism and the agency downgrades you for low pricing, that is an evaluation outside the stated criteria — a post-award challenge. If the solicitation contains only one of the two prongs and you believe realism was intended, that ambiguity is a solicitation defect, and it must be raised before the proposal due date, not after you lose.

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