Federal contracts don't all work the same way. Some pay a fixed amount for a defined deliverable. Others pay based on hours worked. Some are single awards; others create a pool of pre-qualified vendors who compete for individual task orders over several years. Understanding the difference between contract types tells you what you're actually bidding on — and what you're committing to if you win.
Federal contract types fall into two broad categories: pricing structures (how the vendor gets paid) and ordering vehicles (how work is requested and delivered over time). The most common pricing type is Firm-Fixed-Price (FFP). The most common vehicle for recurring services is the IDIQ — Indefinite Delivery, Indefinite Quantity.
Why Contract Type Matters
Contract type determines who bears the cost risk, how pricing is structured, and how work flows over time. Bidding on a cost-reimbursement contract without understanding how cost accounting works — or bidding on an IDIQ vehicle without understanding the task order competition process — can create financial and compliance exposure that isn't obvious until you're already under contract.
Most new federal contractors start with simpler contract types. But understanding the full landscape helps you recognize what you're seeing on SAM.gov and evaluate opportunities accurately.
Pricing-Based Contract Types
Pricing-based contract types define how the contractor gets paid and where the cost risk sits.
Vendor delivers a defined scope for a fixed price. Cost risk sits entirely with the contractor. If the work costs more than estimated, the contractor absorbs the difference.
Well-defined requirements where scope and risk are predictable. Most common contract type in federal procurement. Construction, products, defined services.
Price accurately — there's no mechanism for recovering cost overruns. Build a realistic margin into your bid. FFP rewards efficient contractors; it punishes vendors who underbid to win.
Vendor bills for actual labor hours at negotiated fixed hourly rates, plus actual material costs with a small markup. The agency sets a "not-to-exceed" ceiling.
Work where scope is difficult to define upfront: IT services, maintenance, consulting, repair. Common when the government needs flexible support over time.
Your labor rates are negotiated and fixed — but hours are variable. You cannot exceed the contract ceiling without a modification. Track hours carefully; running out of funding mid-task order is a real risk.
The government reimburses all allowable costs plus pays a fixed fee (CPFF) or a variable award fee based on performance ratings (CPAF). Cost risk sits with the government.
High-uncertainty research, development, and complex programs where costs can't be predicted. Common in R&D, defense development programs, and early-phase technology work.
Cost-reimbursement contracts require significant accounting infrastructure — an approved accounting system that segregates contract costs. New vendors rarely qualify for cost-type contracts without this infrastructure in place.
Similar to T&M but without the materials component. The government buys labor hours at fixed rates. Common for professional services, consulting, and staff augmentation.
Pure labor services with no significant materials component. IT consulting, program management, advisory services.
Ordering Vehicle Types
Ordering vehicles define how an agency structures recurring purchasing relationships — instead of running a new competition for every buy, the agency establishes a pre-qualified vendor pool and issues orders over time.
The agency awards positions to multiple pre-qualified vendors through one competition. Individual task orders are then issued to pool members throughout the contract's life — typically 5 years (base + options).
IT services, professional services, construction, engineering — any category where demand is ongoing but specific requirements aren't known in advance.
Getting "on" an IDIQ is its own competition — separate from competing for individual task orders. Winning a position guarantees nothing; you still have to compete for task orders. The IDIQ ceiling is not the amount you'll be paid — it's the maximum the agency can order across all contract holders.
A simplified ordering arrangement for recurring purchases of similar items or services. Reduces administrative overhead by pre-establishing terms, pricing, and procedures for routine buys.
Routine maintenance, recurring professional services, supplies. Often established off of GSA Schedule or from open competition for specific agency needs.
BPAs are an underrated entry point for small businesses — especially for local agencies and military installations with recurring service needs. Getting on a BPA often requires less competition than a large IDIQ and can provide steady, predictable revenue.
Multi-agency IDIQ vehicles specifically for IT services and solutions. Managed by designated agencies (GSA, NIH, NASA) and available for use by any federal agency government-wide.
Alliant 2 (GSA), OASIS+ (GSA), CIO-SP4 (NIH), SEWP V (NASA). Highly competitive to get onto — typically require significant past performance.
GWACs are generally not a Day 1 pursuit. The most realistic near-term strategy is subcontracting under existing GWAC holders. Build toward GWAC pursuit at the 18–24 month mark as past performance accumulates.
GSA negotiates pricing with vendors upfront. Agencies can then order directly from approved schedule holders without running a separate competition. Open enrollment — businesses can apply at any time.
IT, professional services, facility management, consulting, training. One of the most widely used vehicles across civilian agencies.
Getting on the GSA Schedule provides a government-wide selling platform and signals credibility to buyers. Biz2Gov recommends pursuing the GSA Schedule after a client has 1–2 federal or comparable contracts in hand. Having the Schedule but no strategy to market through it generates little revenue on its own.
One of the most common misconceptions I see is vendors treating the IDIQ ceiling as their expected revenue. An IDIQ with a $50 million ceiling and 30 contract holders doesn't mean each holder gets $1.67 million. It means the agency can order up to $50 million total from the pool. Some holders get everything; some get nothing. Getting "on" the vehicle is just the ticket to compete for task orders — the real work starts there.
Contract Types by Entry Point for New Federal Contractors
Best starting points- FFP contracts under simplified acquisition ($250K and below) — fastest timelines, least competition, minimal proposal formality
- T&M task orders under existing BPAs — recurring work, established pricing, relationship-driven
- Small business set-aside FFP contracts — restricted competition, higher win probability for eligible businesses
- IDIQ positions in your NAICS category — requires 1–2 contracts of past performance to compete credibly
- GSA Multiple Award Schedule — requires past performance and competitive pricing approval by GSA
- Agency-specific BPAs — easier entry than large IDIQs, strong relationship with agency required
New vendors who focus exclusively on IDIQ and GWAC pursuit before establishing any past performance waste significant proposal resources on bids they are unlikely to win. Build from simplified acquisition and set-asides first. Use that past performance to unlock the larger vehicles.
Know What You're Bidding Before You Bid It
Biz2Gov helps small businesses evaluate federal opportunities, understand contract structures, and build a pipeline targeted at the right vehicle types for their stage of growth.
Frequently Asked Questions