Consultant Invoice Template
A free online consultant invoice template built for how advisory work actually gets billed — day rate, monthly retainer, and reimbursable travel expenses, each broken out on its own line. Fill it in and download a PDF in about a minute, no signup required.
Harlow Strategy Consulting
1420 Redwood Ave, Suite 220 · Austin, TX
hello@harlowstrategy.com
Invoice
#INV-2031
Due: Aug 10, 2026
| Description | Amount |
|---|---|
| Strategy consulting — day rate (3 days @ $1,850/day) | $5,550.00 |
| Monthly advisory retainer — July 2026 | $2,000.00 |
| Reimbursable travel — flight + 2 nights lodging | $612.40 |
| Mileage — client site visits (86 mi @ $0.67/mi) | $57.62 |
| Subtotal | $8,220.02 |
| Tax (0%) | $0.00 |
| Total due | $8,220.02 |
Fill in your rate and client details, then download a PDF — no signup required to try it.
What to include on a consultant invoice
A consulting engagement rarely bills like a simple hourly job — there’s usually a day rate or retainer, a signed SOW behind it, and expenses the client agreed to reimburse. A generic invoice template leaves you to remember all of that yourself. Here’s what a consultant invoice needs to hold up to a client’s finance and legal review:
Your consulting business and the client's engagement contact
Your name or firm, address, and email, plus the client's company name and the specific manager or department that approved the engagement — not just a generic "Accounts Payable" line.
Engagement or SOW reference number
If the work runs under a statement of work or master services agreement, cite that reference number so the client's finance team can match the invoice to the signed contract before approving it.
Billing basis: day rate, hourly, or retainer
State clearly whether this invoice is a day-rate engagement, hourly advisory time, or a fixed monthly retainer — each has a different approval path on the client's side and mixing them on one line invites questions.
Service period and scope description
The date range the work covers and a short scope note tied to the SOW ("Q3 pricing strategy review," not just "Consulting") so the invoice is self-explanatory months later during an audit.
Reimbursable expenses, itemized separately from fees
List travel, lodging, and client-approved software or materials as their own line items at cost, distinct from your day rate or retainer — most consulting agreements require expenses billed without markup.
Payment terms and invoice number
A sequential invoice number, issue date, due date, and stated terms (Net 15 or Net 30 are standard for consulting) so there's no ambiguity about when payment is expected.
Sample line items for a consultant invoice
Consulting income usually comes from more than one billing basis in the same month — a project billed by the day, a client kept on monthly retainer, and travel the engagement required. Keeping each on its own line is what makes the invoice easy for a client to approve and easy for you to reconcile later:
| Line item | Basis | Rate | Amount |
|---|---|---|---|
| Day rate — operations diagnostic | 2 days | $1,850/day | $3,700.00 |
| Advisory retainer — capped 10 hrs/mo | 1 month | $2,000/mo | $2,000.00 |
| Reimbursable expenses — flight, hotel, meals | At cost | — | $612.40 |
| Travel — mileage to client site | 86 mi | $0.67/mi | $57.62 |
| Subtotal | $6,370.02 | ||
| Total due | $6,370.02 | ||
Notice the day rate and the retainer stay on separate lines even though both are your time — that split is what lets you (and the client) tell recurring advisory income apart from a scoped project when either of you looks back at the year.
Consultant invoicing tips
Keep retainer and project income separate
A monthly retainer is recurring revenue; a day-rate project is one-off. Track them as separate line items — or separate invoices entirely — so your reports show which clients are predictable income and which are project work you have to keep winning.
Bill expenses at cost, with receipts
Most consulting agreements state travel and materials are reimbursed at cost, no markup. Itemize each expense — flight, hotel, mileage — on its own line and keep receipts ready; it keeps expense lines from slowing down invoice approval.
Set terms by engagement type
Many independent consultants run retainers on Net 15 (so cash flow stays predictable) and one-off day-rate projects on Net 30 to match a client’s standard AP cycle. State a tax ID or W-9 status on the invoice for US clients paying you over $600 a year.
Consultant invoice template FAQ
What should a consultant invoice include?
Your business details, the client's engagement contact, an SOW or engagement reference number, the service period, whether you're billing a day rate, hourly time, or a retainer, itemized reimbursable expenses, and clear payment terms with a due date. Vague line items like "Consulting services" slow down client approval — tie each line back to the scoped work.
How do I invoice a retainer client versus a one-off project?
Keep them as separate line items or separate invoices entirely. A monthly retainer bills a fixed amount for a capped block of advisory time regardless of hours used, while a project or day-rate engagement bills for specific delivered work. Mixing the two on one invoice makes it hard for you — or the client's finance team — to see which income is recurring.
Can I bill travel and expenses separately on a consultant invoice?
Yes, and you generally should. List travel, mileage, lodging, and other reimbursable costs as their own line items at actual cost, separate from your day rate or retainer fee. Most consulting agreements specify expenses are billed without markup, and itemizing them separately makes that easy to verify.
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Updated July 2026