Estimate cash needs by mapping when money leaves the firm and when clients may pay. Build a monthly forecast for the startup period and update it as actual expenses and collections come in. Separate one-time setup costs from recurring overhead and project-specific expenses. Include formation and licensing costs, insurance premiums, software, hardware, rent or remote-work costs, payroll, recruiting, marketing, subcontractors, and professional services. Include owner compensation so the forecast does not depend on founders working without pay indefinitely.
For each likely project, map the steps from notice to proceed through delivery and collection. Estimate when you will pay staff and consultants, complete a deliverable, submit an invoice, receive client approval, and collect. Public clients may have defined invoice requirements. Private contracts may have different approval steps. Ask a prospective client how invoices are submitted, who approves them, and whether a project can be paused while payment is pending. Put the agreed terms in the contract.
Do not count booked backlog as available cash. A signed contract can still produce a delayed start, a disputed invoice, or a long gap between work and payment. Model at least one slower-collection case and one lower-sales case using assumptions you can explain. For example, you could test what happens if a project start slips by a month and a client payment arrives later than forecast. Mark such numbers clearly as hypothetical and replace them with firm-specific experience as it develops.
Also include reserves for approvals, rework, project pauses, and unexpected expenses. Ask your CPA to review expense timing, owner pay, tax deposits, and the bookkeeping categories. If considering a line of credit, ask a qualified lender to explain the interest, fees, covenants, collateral, and personal guarantees. Compare the borrowing terms with the cost and risk of keeping additional cash on hand.
Review the forecast monthly against actual costs, invoices, and collections, and revise it when client behavior or staffing changes.
This is general education, not legal, tax, investment, or engineering advice; licensed PE judgment and local codes govern.
