Free Consulting Invoice Template
Invoice consulting engagements: bill by hour, day or project, itemize expenses, apply any retainer, and download a clean PDF.
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City, Postcode
| Description | Qty | Rate | Amount |
|---|---|---|---|
| Consulting (hours) | 1 | $1,200.00 | $1,200.00 |
| Expenses | 4 | $450.00 | $1,800.00 |
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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
FAQ
- What should a consulting invoice include?
- A
- Should I bill hourly or fixed-fee?
- Fixed fees reward efficiency and are easier to sell to executives; hourly protects you when scope is genuinely unknowable. A common hybrid: a paid discovery phase (fixed) that produces the scoped proposal for the main engagement. Whichever you choose, the invoice should trace to the agreed basis.
- How do milestone payments work?
- The project fee is split across checkpoints — typically 30% at kickoff, then payments tied to accepted deliverables. Each invoice names its milestone (“Milestone 2 — research readout, accepted 7/10”). Tie milestones to acceptance, define acceptance in the SOW, and invoice the same day a milestone is accepted.
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New to invoicing? Read how to make an invoice.