Consultant invoice template

What a consulting invoice should include

A consulting invoice is a formal request for payment, and corporate finance teams expect it to be complete. Missing a single required detail is one of the most common reasons an otherwise valid invoice sits unpaid while it bounces back and forth for corrections.

Whatever your billing model, every consulting invoice should carry the same core information so the client can approve and pay it without asking you a single follow-up question.

• Both parties — your trading name and address, and the client's legal entity and billing address.
• A unique, sequential invoice number and the invoice date (plus any service or delivery period).
• The engagement or purchase-order reference the client asked you to quote.
• Itemised services — a clear line for each block of work, with quantity, rate and amount.
• Subtotal, any tax, and the total due, in the agreed currency.
• Payment terms and how to pay — due date, accepted methods and your bank details.

Billing models — hourly, day rate, retainer, fixed scope

Consultants bill in several different ways, and the clearest invoices make the model obvious at a glance. Match how you itemise the work to how you agreed to be paid:

• Hourly — list hours worked and your hourly rate; if useful, break the hours out by task or date so the client can see where the time went.
• Day rate — bill in whole or half days at your daily rate; state the number of days and the period they cover.
• Monthly retainer — a single recurring line such as “Advisory retainer — March”, with the agreed monthly fee; note what the retainer covers if scope is capped.
• Fixed-scope or project — invoice against defined deliverables or milestones, each as its own line, so a phased project can be billed in stages.

Billing expenses and disbursements

Consulting engagements often involve costs you incur on the client's behalf — travel, accommodation and subsistence, software, or subcontractor fees. Whether and how you can recharge these should be agreed up front, then shown transparently on the invoice.

Keep expenses as separate line items rather than folding them into your fee. It makes the invoice easier to approve, keeps your professional fees distinct from reimbursements, and gives the client the audit trail their finance team needs.

• Pass-through (at cost) — you recharge exactly what you paid, with receipts on request; common for travel and subsistence.
• Marked-up — you add an agreed handling percentage; only do this when the contract allows it, and state the basis clearly.
• Subcontractor costs — list third-party work you are passing on separately from your own time.

Purchase orders, references and presentation

Many corporate clients run a purchase-order system: before work starts, they raise a PO number, and their finance team will not pay an invoice that does not quote it. Ask for the PO number at the start of the engagement, not when you are ready to bill.

Alongside the PO, clients often ask you to quote a cost centre, project code or the name of the person approving the work. Putting every reference the client gave you on the invoice is what moves it straight through approval instead of into a queue of exceptions.

• Quote the purchase-order number exactly as issued, usually near the invoice number.
• Include any cost centre, project or engagement code the client specified.
• Name the client contact or approver if they asked you to.
• Keep the layout clean and legible — a tidy, well-numbered invoice is approved faster than a cluttered one.

Tax and payment terms

Whether you charge VAT, GST or sales tax depends on your country, your registration status and sometimes where your client is based. Some consultants are below a registration threshold or exempt and charge no tax at all; others must add it and show their tax number. This page is general guidance, not tax advice — confirm your own position with a local accountant.

Payment terms tell the client when and how to pay. Spell them out rather than assuming: state the due date, whether you allow a late fee, and give complete bank details — including the fields international transfers need — so nothing stalls the payment.

• Net terms — for example “Net 14” or “Net 30”, i.e. payment due 14 or 30 days from the invoice date.
• Late fees — if your contract allows interest or a fee on overdue amounts, state the rate and when it applies.
• Currency — show the invoice currency clearly, especially for cross-border work; agree it before you start.
• International details — for overseas clients include IBAN/SWIFT-BIC or the equivalent so a wire transfer can reach you.

Create one fast with this tool

You do not need accounting software or a subscription to send a professional consulting invoice. Fill in a simple form, add your services and any expenses as separate lines, quote the PO and references, and download a clean PDF ready to send.

Since it all runs in your browser, your day rates, retainer figures, client names and bank details stay on your device — none of it is uploaded to a server or tied to an account.

• Add your details and the client's, plus the PO or engagement reference.
• List services by your billing model — hours, days, retainer or milestones.
• Add travel, subsistence and subcontractor costs as separate expense lines.
• Pick your currency and set net payment terms and bank details.
• Download a polished PDF invoice — free, with no watermark.

Frequently asked questions