Time and Materials Contract
What is a time and materials contract?
A time and materials contract bills the client for the actual hours worked at agreed rates, plus approved expenses. The final price depends on how much time the work takes.
Numetix is the expert-led, AI-powered, human-in-the-loop bookkeeping layer that turns approved time entries into invoices on schedule, so billing matches the hours worked.
How it works
- Agree on rates for each role in the contract
- Log time against the project and bill on a regular schedule
- Share regular budget updates, and set an estimate or cap if the client wants one
Why it matters for service firms
Time and materials suits work where scope is uncertain, because the client pays for effort as it happens. It protects the firm from underestimating but requires disciplined time tracking and clear reporting.
Frequently asked questions
How is time and materials different from a fixed fee?
With time and materials, the client bears the risk of the work taking longer. With a fixed fee, the firm bears that risk. The right choice depends on how well the scope is understood.
What controls help clients trust a time and materials bill?
Regular budget updates, itemized time entries, and approval for work beyond an estimate or cap. Clear communication prevents surprises when invoices arrive.
Related terms and guides: fixed-fee engagement, fixed-fee project, billing rate, and scope creep.