Free Consulting Invoice Template

What to include on a consulting invoice

• Your firm/name and contact
• Client and engagement/SOW reference
• Hours, day rate or fixed project fee
• Expenses and any retainer applied
• Tax, total and net terms

Four ways consultants bill — and when each fits

Consulting has no single billing norm; it has four, and the invoice should say which one governs. Hourly suits open-ended advisory. Day rates suit workshops and on-site engagements. Fixed project fees suit defined deliverables — usually billed in milestones (a kickoff payment, one or two mid-points, a completion balance) so neither side floats the whole engagement. Monthly retainers suit ongoing access, invoiced in advance with the included scope stated. Expenses bill separately at cost per your agreement. Whatever the model, the invoice should reference the proposal/SOW so the number on the bill traces to a number the client already approved.

Typical consulting rates (US)

Specialty and seniority spread these across an order of magnitude:

• Independent consultants, hourly: $100–$300+; niche technical experts higher
• Day rate: commonly 6–8× the hourly rate ($800–$2,500+)
• Project fees: milestone-billed — e.g. 30% kickoff / 40% midpoint / 30% delivery
• Monthly retainer: $2,000–$10,000+ depending on access and scope
• Rush or weekend work: +25–50% where accepted at all
• Travel: billed at cost, or a per-diem, per the agreement

Invoice practices that keep engagements clean

• Reference the SOW/proposal and the milestone or period each invoice covers
• For hourly work, attach a time summary by workstream — enough detail to justify, not a surveillance log
• Invoice milestones on acceptance criteria, not calendar dates, so payment tracks delivered value
• Bill retainers in advance on the 1st; state what the retainer includes and how unused capacity is treated
• Net 15 beats Net 30 for independents — big-company AP fills whatever window you give it