This month, Boeing was awarded a nearly $16.2 million firm-fixed-price contract for ICBM door launchers through 2030, while Pratt & Whitney received a $19.3 million indefinite-delivery/indefinite-quantity (IDIQ) contract for contractor engineering and technical services. The scope of the work for the IDIQ contract is for advisory engineering and technical services until organic engineering capability is developed, with work expected to be completed by the end of September 2031. The Boeing firm-fixed-price contract is also scheduled to extend through 2030.
Although the contract values and lengths aren’t all that dissimilar, the contract types differ greatly.
Defense procurement relies on four primary contract categories governed by the Federal Acquisition Regulation (FAR) and the Pentagon.
Fixed-Price Contracts
In this contract type, the government sets a predetermined, firm price for a clearly defined product or service. It is used when the scope of work and costs are clear and well defined. The government then pays a set price regardless of the contractor’s actual expenses.
The financial risk falls almost entirely on the contractor because, if the project costs more than expected, the contractor absorbs the loss. However, if it costs less, the contractor will earn a larger-than-expected profit.
This is typically used for commercial items, standard manufacturing, or well-scoped programs where costs can be reliably predicted. Moreover, fixed-price contracts do not always require specifying a total number of units upfront.
Instead, they can be structured as lump-sum, level-of-effort, or indefinite-delivery arrangements. In addition, contracts can be priced for an entire scope of work or defined milestones as a single total price, yet without breaking it down to the individual unit.
A firm-fixed-price, level-of-effort contract specifies the total time period and a fixed dollar amount rather than a specific number of products or service units delivered.
When used for construction, supplies, or recurring services, a fixed-price contract can specify exact unit prices tied to a measured quantity of work units.
Cost-Reimbursement Contracts
Under a cost-reimbursement contract, the government pays the vendor for all allowable, actual costs incurred during the project, plus an additional fee, which can include a fixed fee or an award fee. Unlike a fixed-price contract, the government bears most of the financial risk.
This contract type is typically used for research, development, or uncertain scopes and cannot exceed this limit without explicit permission from the contracting officer or buyer. The government pays the vendor for all allowable incurred costs plus an additional fee. It can, however, set an estimated total cost and spending limit, and contractors cannot exceed this limit without explicit permission from the contracting officer or buyer.
Time-and-Materials Contracts
With a time-and-materials (T&M) contract, payment is based on agreed-upon hourly labor rates – which can include wages, overhead, and profit – plus the actual cost of materials. It is mostly used for support or maintenance services when exact needs or hours are not known upfront, and the pay is based on agreed hourly labor rates plus material costs.
With a T&M contract, the risk is shared. The government carries the risk of unconstrained hours, notably open-ended timelines. In contrast, the contractor carries the risk of rising labor or material expenses if caps are not put in place.
Clients pay a fixed hourly rate that covers the worker’s wages, overhead, administrative costs, and contractor profit, and clients also reimburse the exact cost of direct materials, supplies, and equipment, often plus an agreed-upon markup percentage – typically 15% to 35% – for handling and profit. Most T&M agreements include a Not-to-Exceed (NTE) clause to set a hard ceiling on total spending and protect the client from runaway costs.
These contracts are frequently used for professional support services, IT maintenance, or emergency repair work where the exact amount of labor needed is uncertain.
Indefinite-Delivery/Indefinite Quantity Contracts
An indefinite-delivery/indefinite-quantity (IDIQ) contract is a flexible ordering mechanism used when the exact times or quantities of supplies/services are not known at the time of the initial award. An IDIQ contract allows the government to issue individual task or delivery orders over a set period.
Such contracts specify a guaranteed minimum amount, which the government must buy or pay for, and a ceiling maximum limit. The risk is deferred until individual task orders are issued and priced out as fixed-price or cost-reimbursement structures.
IDIQ contracts are typically used for recurring, long-term defense requirements, military base operations, or blanket supply needs. For agencies, the benefit is avoiding a brand-new, full procurement process every time a specific need arises. Terms, conditions, and pricing rules are set up front. Supplies or services are ordered only as requirements materialize, and delivery schedules can be adjusted to match shifting project needs.
In addition, organizations can keep stock levels to a minimum and arrange direct shipment to end-users only when required. The buyer’s financial obligation is strictly limited to the guaranteed minimum quantity stated in the contract, and agencies can use up remaining end-of-year funds by issuing task orders against existing, pre-approved contracts.
For the contractor, winning a spot on an IDIQ vehicle can secure a long-term relationship with an agency, opening the door to a steady and predictable stream of future task orders. Instead of bidding on hundreds of small, individual projects, suppliers manage one large, multi-year master contract.
