Time-Based Contract (Consulting)

A Time-Based Contract in consulting is a contract type under which the client pays the consulting firm for the actual staff time delivered at pre-agreed daily, monthly, or hourly rates, plus reimbursable expenses such as travel and accommodation, rather than a fixed fee for a defined deliverable.

What is a Time-Based Contract (Consulting)?

MDB procurement guidelines offer lump-sum-contract-consulting and time-based contracts as the two standard consulting contract types, and the choice depends primarily on how well the scope can be defined. When the assignment requires continuous advisory presence, the scope may evolve as the project proceeds, or the number of inputs needed cannot be reliably estimated upfront, time-based is the appropriate structure. Common examples include project supervision, institutional strengthening, policy advisory roles, and long-term technical assistance where the client needs to adjust the consultant's tasks over time.

Payment is based on verified staff months or days actually worked, confirmed through timesheets or equivalent records against an agreed staffing plan drawn from the technical proposal. The contract sets an estimated total fee and an input ceiling, usually the number of staff months budgeted for each expert named in the proposal under tor (Terms of Reference). If the assignment ends sooner or requires fewer inputs, the client pays only for what was actually delivered. The qcbs selection method is commonly used for time-based consulting assignments, with the financial proposal pricing the staffing plan at the firm's quoted rates.

Why Time-Based Contracts matter for bidders

Time-based contracts shift scope risk back to the client, which protects the firm from the cost-overrun trap that can undermine a lump-sum-contract-consulting. However, the firm must manage inputs carefully: the contract has a ceiling, and a team that is inefficient or poorly organised can exhaust the authorised budget before delivering what the TOR requires, creating the same cash-flow crisis as a lump sum overrun. The practical discipline is to track staff hours monthly against the agreed input schedule, flag variations early, and formally seek a budget revision if scope genuinely expands. Firms that manage time-based assignments transparently build trust with clients and MDB project teams, which feeds directly into repeat selection and strong performance references for future competitive processes.

FAQ

What is included in reimbursable expenses on a time-based contract?

Reimbursable expenses typically cover economy-class international and local travel, per diem allowances at agreed rates, visa and related fees, report production costs, and other mission-related costs defined in the contract's reimbursable schedule. The client pays actuals against receipts, up to the budgeted ceiling.

How do MDBs verify staff time on a time-based contract?

Verification is through monthly timesheets signed by both the team leader and the client's project coordinator, confirming the days worked by each named expert. MDB supervision missions and post-review audits sample these records to confirm that billing matched actual presence.

Can a time-based contract have a maximum ceiling?

Yes. MDB-financed time-based contracts always specify a total input budget and a financial ceiling. The consultant cannot invoice beyond the ceiling without a formally approved contract amendment, regardless of how much work remains outstanding.