Consulting invoice template (free PDF)

Consulting clients — especially larger companies — pay through an accounts payable team that checks every invoice against a purchase order or contract. A clear, complete invoice sails through; a vague one sits in a queue.

This free template gives consultants a professional layout for hourly, day-rate and retainer work.

What to include on a consulting invoice

• Your business name (or your own name) and address, plus an email accounts payable can reach.
• Client company name and billing address — and the name of your contact.
• Invoice number, issue date and due date.
• Purchase order (PO) number, if the client gave you one. Many companies can't pay an invoice without it.
• Engagement reference: project name, contract or statement of work number.
• Line items for time, fixed fees and expenses.
• Payment terms and methods.

Hourly, day rate or retainer?

Hourly: list hours as the quantity — 12.5 hrs × $175. Add a short description of the work for each line or phase.

Day rate: use days as the quantity — 3 days × $1,400 — and note the dates.

Retainer: one line for the retainer period — "Advisory retainer, October 2026" — plus extra lines for hours beyond the retainer if your agreement allows.

Fixed fee: one line per milestone or deliverable, matching the proposal the client approved.

Expenses

If your contract allows reimbursable expenses, add them as separate lines:

Description	Qty	Rate
Strategy workshop facilitation	2 days	$1,400.00
Round-trip flight NYC–Chicago (receipt attached)	1	$386.40
Hotel, 2 nights	2	$219.00

Keep receipts and send copies with the invoice if the client asks for them.

Payment terms that work for consultants

Most corporate clients pay on Net 30, and some insist on Net 45 or Net 60. Agree on terms in your contract and show them on every invoice. Read Net 30 explained for how due dates are calculated and how to handle late payments.

For new clients or large engagements, consider a deposit or monthly billing rather than one big invoice at the end — see partial payments and deposits.

Making it easy for accounts payable

• Use the exact legal name of the client's company.
• Include the PO number and your contact's name.
• Offer ACH (bank transfer) details — most companies prefer it — or a payment link.
• Add a payment note like "Please include INV-1012 with your payment" so the payment can be matched.

Sales tax for consultants

In most states, consulting, advisory and professional services aren't subject to sales tax. A few states tax particular services — for example, Texas taxes data processing and information services (see our Texas guide). If your work includes software, data or physical deliverables, check your state's rules.

A worked example

Here's how a two-day workshop engagement might look on a consulting invoice:

Description	Qty	Rate	Amount
Discovery interviews (PO 45-2231)	6 hrs	$175.00	$1,050.00
Strategy workshop facilitation	2 days	$1,400.00	$2,800.00
Workshop report and recommendations	1	$1,200.00	$1,200.00
Travel expenses at cost (receipts attached)	1	$824.40	$824.40
Total			$5,874.40

With Net 30 terms and an invoice date of September 24, the due date is October 24. The PO number in the first line (or in the PO field) lets the client's accounts team match the invoice to the approved purchase order.

Common mistakes on consulting invoices

• Missing the PO number — many companies can't pay without it.
• Vague descriptions like "Consulting services" with no dates or deliverables.
• Billing expenses the contract doesn't allow, or without receipts.
• Using a personal name the client doesn't recognise instead of the business name on the contract.
• Sending invoices late — the payment clock only starts when the invoice arrives.

Keeping good records

Save a PDF of every invoice you send, and keep your invoice numbers in order with no gaps or duplicates. Record when each invoice was paid and how. At tax time, those records make it simple to total your income and — if you charge sales tax — to report exactly what you collected. Signing in to Invoice Native (coming soon) will keep your invoices, customers and payments together in one place.

Checklist

• ✅ PO number and engagement reference on every invoice
• ✅ Time, fixed fees and expenses on separate lines
• ✅ Due date written out, not just the terms
• ✅ ACH details or a payment link included
• ✅ Receipts kept for reimbursable expenses