Free Consulting Invoice Template
Consulting invoices often combine a monthly retainer, extra hours beyond it, and reimbursable expenses. Keeping those on separate lines makes the invoice easy to approve and easy to audit later.
Use this templateSample consulting invoice
These are the line items the template starts with. Change anything in the generator.
| Description | Qty | Rate | Tax | Amount |
|---|---|---|---|---|
| Advisory retainer: September | 1 | $4,000.00 | — | $4,000.00 |
| Additional strategy sessions (hours) | 6 | $200.00 | — | $1,200.00 |
| Travel expenses (at cost) | 1 | $385.00 | — | $385.00 |
| Total | $5,585.00 | |||
NotesService period: 1–30 September. Engagement reference: SOW-2026-014.
TermsPayment due within 30 days (Net 30).
What to include on a consulting invoice
Along with the basics (your details, the client's details, an invoice number, dates and totals), make sure you cover:
- Service period
- State the period covered (for example, 1–30 September) so retainers and hours map to a month.
- Retainer vs. additional hours
- Show the retainer as one line and any hours over the retainer as a separate line at your hourly rate.
- Reimbursable expenses
- List travel or third-party costs at cost, one line each, usually without markup unless agreed.
- Engagement reference
- Reference the statement of work or engagement letter the fees come from.
Tips to get paid faster
- Send retainer invoices at the start of the period and usage-based invoices at the end.
- Keep receipts for expenses; clients may ask for them before paying.
- If a client needs a purchase order number on the invoice, ask for it before you send.
Consulting invoice FAQ
How do I invoice a consulting retainer?
Add one line for the retainer covering the service period, at the agreed monthly fee. Bill extra hours on their own line so the retainer amount stays the same every month.
Can I add expenses to a consulting invoice?
Yes. Add each reimbursable expense as its own line item. Taxes on expenses depend on local rules, so set the tax rate per line.
What should a consulting invoice's notes say?
The service period, the engagement or SOW reference, and who approved the work. That's usually all the client's accounts team needs to pay.
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Use this template