Start with what it costs the firm to deliver work, then decide how much of that cost the rates need to recover. Build the calculation from salary, payroll taxes, benefits, insurance, software, rent, equipment, administrative support, and other overhead. Include time that employees spend on training, business development, leave, internal meetings, and other work that cannot be billed to clients. If you leave that time out, the rate may look sufficient on paper while the firm runs short of revenue.
Write down the assumptions by role. For example, a project engineer and a senior reviewer may have different compensation, availability, and responsibilities. Apply the firm's cost method consistently, then add a planned operating result. A rate should support the work required for competent delivery, including coordination and review. It is not an employee's wage, and it does not automatically determine the project's fee.
Before using the rates in proposals, check contract and procurement terms. A public client may prescribe rate schedules, caps, cost rules, or audit requirements. For private work, consider whether hourly rates apply only to additional services or also to the base scope. Spell out how annual rate updates, overtime, expenses, and work by subconsultants will be handled.
An owner can take these steps:
- Reconcile compensation and overhead inputs with the latest financial records.
- Compare planned billable hours with actual timekeeping and collection history.
- Test the rates against a few completed projects with similar scope and staffing.
- Ask the CPA how the firm allocates overhead and whether the chosen calculation matches its reporting.
- Ask the contract attorney to review rate escalation language and public contract restrictions.
Revisit rates when compensation, overhead, service mix, or workload changes. Local market information can help assess competitiveness, but another firm's rate may reflect a different cost structure, staffing model, or project risk.
This is general education, not tax, legal, investment, or engineering advice; licensed PE judgment and local codes govern.
