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Consulting Invoice Template

Consultants bill for hours, a retainer or a defined deliverable, and a client's finance team checks the invoice against the engagement letter. This consulting invoice template keeps fees and expenses apart so it passes that check.

Last updated October 15, 2026
Fill in this templateSee the exampleWord and Excel

Free, no signup. Reviewed by M. Humza.

Northbridge Advisory LLC
65 E. State Street, Suite 1800
Columbus, OH 43215
billing@example.com
(614) 555-0190
INVOICE
Invoice no.INV-1042
Invoice date09/28/2026
TermsNet 30
Due date10/28/2026
BILL TO
Calder Manufacturing Inc.
3700 Interchange Road
Columbus, OH 43204
DescriptionQtyRateAmount
Strategy consultingSep 1 to Sep 3018.5 hr$175.00$3,237.50
Stakeholder workshop, half day1 ea$1,200.00$1,200.00
Travel: airfareAt cost, receipt attached1 ea$386.40$386.40
Travel: lodgingAt cost, receipts attached2 night$189.00$378.00
HOW TO PAY

Pay by ACH or wire. Bank details are in the engagement letter. Reference the invoice number.

NOTES

Thank you. Per our agreement, balances unpaid after the due date may incur a late fee.

Subtotal$5,201.90
Total$5,201.90
Balance due$5,201.90

Sample data. Names are invented and prices are placeholders to show the layout, not market rates.

Use this templateAll invoice templates

Hourly, retainer or fixed fee

Consultants bill by the hour, by a fixed fee per deliverable, or by a monthly retainer. Hourly invoices should show the hours and rate for each type of work, with dates or a short activity note in the detail line.

Reimbursable expenses such as travel belong on separate lines at cost, so the client can match them to receipts.

For a retainer, bill one line such as "Monthly advisory retainer, October" at the agreed fee, usually at the start of the month. Hours beyond the retainer go on a second line at your hourly rate, so the client sees both.

What a client's accounts payable team expects

  • Engagement or project name. With the client's purchase order number if they issued one.
  • Billing period. The dates the invoice covers.
  • Hours by activity. Workshops, analysis and reporting on separate lines when the rates differ.
  • Expenses at cost. Travel, lodging and materials, one line each.
  • Late fee wording. Only if your contract sets one, since some states limit late charges.

Building the monthly consulting invoice

  1. Head it with the engagement. Project name and the client's PO number, which many companies need before they can pay.
  2. Set the billing period. "Sep 1 to Sep 30" in the detail of the hours line.
  3. Group hours by type of work. One line for analysis, another for a workshop if it has its own fee.
  4. Add expenses at cost. Airfare, lodging and the like, receipts attached.
  5. Send it to the billing contact in the contract. Not just your day-to-day contact, who may not handle invoices.

Consulting invoice example

A month of advisory work with travel at cost, totaled by the same engine as the generator.

LineQuantity and rateAmount
Strategy consultingSep 1 to Sep 3018.5 hr at $175.00$3,237.50
Stakeholder workshop, half day1 each at $1,200.00$1,200.00
Travel: airfareAt cost, receipt attached1 each at $386.40$386.40
Travel: lodgingAt cost, receipts attached2 nights at $189.00$378.00
Subtotal$5,201.90
Total, net 30$5,201.90

None of these lines is taxed. Most states leave professional consulting untaxed, so the sample charges no sales tax. A handful tax services broadly or tax particular ones; the FAQ below names them.

Consulting invoice example with strategy consulting, stakeholder workshop and travel and the total due
The consulting sample invoice in the Classic layout.

Payment terms: Net 30

Net 30 is the usual default for business clients, and the sample uses it. Larger companies may set their own terms in a vendor agreement, sometimes Net 45 or Net 60, so match whatever you signed.

Consulting invoice in Word or Excel

The Word and Excel files start with the hours, workshop and travel lines from the sample.

Blank copy in Google DocsBlank copy in Google Sheets

Proposals and retainer receipts

Scoping a project before the engagement letter? The consulting estimate template works as a priced proposal. When a retainer is paid up front, send a consulting receipt to confirm it.

Sources

Invoice only for real work. An invoice must describe goods or services actually provided or agreed. Read our acceptable use policy.

Frequently asked questions

How do I invoice a consulting retainer?
Add one line for the retainer with the month in the detail. If hours over the retainer are billable, add them as a second line with the extra hours and your rate.
Should I show hours on a consulting invoice?
For hourly work, yes: hours, rate and a short note or date range. For fixed-fee work, a line per deliverable is enough.
Can I mark up expenses?
Only if your agreement allows it. Otherwise bill each expense at cost on its own line and keep the receipts; if a markup is allowed, show it as a separate line so the client sees it.
Do consultants charge sales tax?
Usually not, because most states do not tax professional services. Some do: South Dakota taxes most services, Hawaii and New Mexico tax gross receipts from services, and Washington has taxed IT consulting and live workshops since October 1, 2025, with some exclusions added from July 1, 2026. Check your state revenue department.

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