Invoicing for Consultants

Day rates signal something hourly does not

Two consultants can charge the same money and be perceived completely differently depending on how they present it. An hourly rate invites the client to audit your time and negotiate the number down. A day rate prices access to your judgment and moves the conversation to how many days the engagement needs.

It also protects you from the least profitable pattern in consulting: being paid for the hours you were visibly working, but not for the thinking that happened on the drive home or while reading their industry press.

Keep an hourly rate available for genuinely small advisory pieces, but lead with day and half-day rates. Senior consultants almost universally converge on this, and clients read it as a signal of where you sit in the market.

Retainers are the goal, not the hourly work

Project consulting has a structural problem: every engagement ends, so you are permanently selling. A monthly retainer — ongoing advisory, a standing block of availability, a recurring strategy session — replaces that with revenue you can plan a life around.

Set retainers up as a recurring schedule and the invoice goes out on its date every month untouched. This matters more for retainers than almost any other billing type, because invoicing a retainer feels awkward in a way invoicing a project does not — in a quiet month there is no deliverable to point at, so it is the invoice most likely to get quietly delayed. Automating it removes the hesitation entirely.

Be explicit about what the retainer buys — hours, response time, scope of advice — and whether unused time rolls over. Most consultants say it does not, because the client is buying access, not a stockpile.

Recurring schedules and automatic reminders are part of Pro. The free plan covers three invoices a month.

Bill expenses without the awkwardness

Travel, accommodation, and materials cause more friction than they should, almost always because they were never discussed up front. Agree the treatment when you agree the fee: what is reimbursable, whether travel time is billable, and whether there is a cap.

Then put expenses on the invoice as their own pass-through lines, clearly separated from your fee. A client reviewing "Consulting — 4 days" and "Travel & expenses" as distinct items understands both. The same total presented as one blended figure invites questions about your rate that have nothing to do with your rate.

Bill travel time separately from expenses too. They are different things — one is your time, one is a cost you carried — and clients treat them differently.

Stop retyping the same lines

Most of what you bill is the same handful of things over and over. The price book saves them once — description, labor or materials, unit, your rate — and then you add them to an invoice, estimate, or recurring schedule in one click instead of typing them again.

That matters beyond keystrokes. When the price lives in one place, the same job stops being billed one figure this week and a different one next week, and raising your rates is a single edit rather than something you have to remember every time. Prices are copied onto each invoice as you create it, so putting your rates up never rewrites a document you already sent.

There is a ready-made Consultant / Advisor starter list built in, with the lines this trade typically bills already sorted into labor and materials. Rates are left blank on purpose — pricing varies far too much by region for a suggested number to be worth anything. You fill in yours once.

Example invoice line items

A realistic consultant invoice, itemized the way that prevents questions:

Frequently asked questions