How to write a consultant invoice

What goes on a consultant invoice

Six things, in the order they belong on the page. The invoice generator opens a consultant document with the lines already in place, so most of this is checking rather than typing.

1. Name the engagement and the phase. Which piece of work, and which stage of it. A finance team paying three invoices from you needs to tell them apart without asking.
2. Show the days and the rate. Four days at your rate reads as four days. A single project figure with no unit is the one that gets queried.
3. Name the deliverable on the line. What was produced: the report, the workshop, the model. It is what a finance team needs before releasing payment.
4. Keep expenses separate and evidenced. Travel, accommodation and third-party costs on their own lines, at cost unless you agreed a handling fee. Folded into the day rate they look like a rate rise.
5. Reference the purchase order. Corporate clients pay against a PO. An invoice without the number does not get queried, it just waits.
6. Set terms in days, not on receipt. Net 30 enters a payment run. On receipt enters the same run with less information.

The lines a consultant invoice usually carries

These are the lines the generator opens with when you pick Consultant. The figures are a starting point to type over rather than a going rate: this site runs no pricing survey, and the number on your invoice should be the one you charge.

Add, rename, reorder or delete any line, and set tax per line where it applies. Priced as they open, that comes to $6,350 before tax.

A worked consultant invoice, filled in

This is the same job as the table above, written out the way it would leave your phone. Every figure on it is a starting point rather than a going rate, and the tax line is shown at ten per cent purely so the arithmetic is visible: set your own rate, or none, per line.

Subtotal $6,350, tax $635, total $6,985. The parts worth copying are the structure rather than the numbers: the job reference next to the client, every line separately priced with its count showing, the tax on its own line, and terms that name a number of days instead of saying on receipt.

Day rate, project fee or retainer, and when each one gets you paid

These are three different commercial relationships and they invoice differently. A day rate bills what happened, a project fee bills what was agreed, and a retainer bills access whether or not it is used.

The day rate is easiest to defend and hardest to scale, because every extra day is a fresh conversation. A project fee is cleaner to approve but only if the scope is written down, or you absorb the drift. A retainer is the most predictable and the most likely to be questioned at renewal, which is why the invoice should name what it covers rather than reading as a standing charge.

Whichever it is, invoice in the same unit you quoted in. A client who agreed days and receives a project figure cannot check it, so they hold it while they ask.

Phased engagements and getting paid before the end

A three-month engagement invoiced once at the end is three months of exposure to a client whose priorities may change halfway through.

Break it into phases with a payment attached to each: discovery, analysis, recommendations. Each invoice references something the client has actually received, which is what makes it easy to approve and hard to defer.

Put the phase on the invoice line itself rather than only in your own notes. The cost estimator is for costing those phases before you quote them, and the same lines then carry into the invoice rather than being retyped.

Expenses, and the mark-up nobody agreed to

Expenses are where trust is quietly lost. A client who sees a round number for travel assumes there is margin in it, whether or not there is.

Bill them at cost on their own lines, with the detail that makes them checkable: the route, the nights, the third-party invoice. If you charge a handling fee on disbursements, name it as a percentage line rather than hiding it inside the cost.

Agree the expense policy before the first trip. Clients with a corporate travel policy will apply it to you retrospectively if you did not ask, and that is a discussion had after you have already paid for the hotel.

Hourly, fixed price or per unit: how consultants price the work

Consulting is priced by the day, by the project or by value, and the direction of travel through a career is away from the first one. A day rate caps what expertise can earn at the number of days in a year, which is the one number you cannot increase.

Bill against phases rather than months where you can. A phase has a deliverable a finance team can approve, where a month has only elapsed time, and the difference shows up in how quickly the invoice clears.

Working out what to charge

This guide is about what goes on the document, not what the number should be, and nobody should hand you a rate for your own market. What the site can do is the arithmetic: the freelance rate calculator works back from what you need to earn, the service price calculator prices a service against your costs, and the profit margin calculator checks what is left once the job is done.

Writing it on your phone, in five steps

Most consultants write the invoice standing next to the work rather than at a desk a week later, and the week later version is the one that gets details wrong. The generator is built for the first case.

1. Open it with your trade already chosen. The consultant invoice loads with strategy session and the rest of the lines already on the page.
2. Put the client and the job reference in first. It is the part you will not remember accurately in three days, and on agent, landlord or contractor work it is the reason the invoice gets paid at all.
3. Edit the lines rather than starting from empty. Change the quantities and the rates, delete what you did not do, add what you did. Keeping the descriptions means the wording stays consistent from one job to the next.
4. Set the terms to 30 days and add a payment link. A due date that is an actual date gets chased. A link and a QR code means it can be settled before you have packed up.
5. Send it before you leave. The clock on your terms starts when the invoice arrives, not when the work finished, so every day it sits unsent is a day added to getting paid.

Getting paid once it is sent

Put a due date and your terms on the document, because an invoice without them is hard to chase. Add a payment link and a QR so settling up is a tap rather than a transfer somebody has to set up. When part of it lands, the receipt maker records it as a part payment and prints the balance still due. If the due date passes, the late fee calculator works out what your own terms allow and writes the chasing letter to go with it.

Five dates decide whether a consultant gets paid on time, and four of them are set before the work starts.

Mistakes that cost consultants money

• Invoicing in a unit you did not quote in. The client cannot reconcile it, so it waits while they ask.
• No deliverable named. A finance team cannot approve a fee for something the line does not describe.
• No PO number. It will not be queried. It will just sit unpaid.
• Expenses rounded. A round number for travel reads as a margin, even when it is not.
• One invoice at the end. Three months of work resting on one approval from a client whose priorities may have moved.

Consultant invoice questions

Free consultant invoice template

The free consultant invoice template opens with the lines above already priced, in any of 200 designs, and exports a print-ready PDF with no signup and nothing saved to a server. If you would rather edit a file offline, there are 72 Word templates, 72 Excel templates with the totals already calculating, and 72 fillable PDFs.

Invoicing guides for related trades

The same billing questions come up next door. These four guides cover the trades closest to consultants, and each one sits alongside its own free template.

Every trade has one: see all 46 invoicing guides, or go straight to the 46 free invoice templates they describe.

Everything on this site, set up for consultants

The whole toolkit, with the reason each one matters to consultants rather than in general. The five marked links open with consultant already selected.

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