Firm-Fixed-Price vs. Time-and-Materials Contracts

Different allocation of cost risk

Firm-fixed-price contracts generally place cost responsibility and resulting profit-or-loss risk on the contractor. Time-and-materials contracts use specified labor rates and applicable material-payment rules. Neither label removes the need to read clauses and funding conditions.

Compare the scope

1. 01How clearly are deliverables and acceptance defined?
2. 02Which labor, materials, and other charges can be billed?
3. 03What ceilings, approvals, records, or oversight apply?
4. 04How are changes authorized?
5. 05What happens when assumptions or actual effort differ?

Avoid common assumptions

Fixed price does not mean no authorized changes or available contractual relief. T&M does not mean unlimited reimbursement or permission to perform beyond a ceiling. Labor-hour arrangements also differ from T&M by omitting the materials component.

Price for the actual obligations

Evaluate staffing, schedule, productivity, indirect costs, and financial exposure. A contract's method influences risk, but scope, clauses, acceptance, and administration determine the practical consequences.

Use current FAR and agency guidance and obtain qualified help for uncertain provisions. A one-line description is not enough to decide whether the terms fit your business.