The contract determines which expenses can be billed, what records are required, and whether charges are passed through at cost or on another agreed basis. An expense can be necessary for the work and still be nonreimbursable if the contract says it is included in the fee, requires advance approval, or sets a limit. Check the agreement and proposal before committing the firm to a material cost.
At estimating, list likely travel, mileage, printing, permit fees, shipping, testing, equipment rental, and subcontractor costs. Confirm whether the client requires approval above a threshold, specifies an expense rate, or prohibits certain charges. For lump sum work, decide whether expected expenses are included in the fixed fee or billed separately. For hourly or cost based work, make the treatment clear in the fee schedule.
During delivery, maintain records that connect each charge to the project and its purpose. A useful record includes the date, vendor, amount, project reference, receipt, reason for the expense, and any required client approval. Have a project manager review charges before invoicing. Keep labor separate from direct expenses in internal reports so the firm can see whether a project is consuming more travel, testing, or subcontractor cost than planned.
If an expense assumption changes, tell the client before incurring the cost when practical. For example, a site visit may require additional travel after the client changes the meeting location. Confirm whether the contract allows that cost and whether written approval is required. Avoid promising reimbursement based only on past practice or an informal comment.
Owners should ask the CPA how to record reimbursed costs, whether any markup is treated as revenue, and what documentation to retain. Ask the contract attorney to review unclear expense clauses, particularly when the client requires prior approval or imposes a cap. Public contracts may have specific cost documentation and audit provisions.
Review expense totals during project check-ins rather than waiting for closeout.
This is general education, not accounting, tax, legal, investment, or engineering advice; licensed PE judgment and local codes govern.
