Consulting Invoice Template (Free)
Consulting work rarely fits neatly into "one item, one price" — it's usually billed hourly, as a recurring retainer, or against project milestones. Here's how to invoice for each without confusing the client.
Build your invoice now
Add as many line items as your billing structure needs — hourly, flat-fee, or a mix — and Invoshi totals it automatically.
Create a free invoice →Three common consulting billing structures
- Hourly — line items broken down by task or week, with hours and rate shown separately, so the client can see exactly where the time went rather than a single lump sum.
- Retainer — a fixed recurring fee, often invoiced at the start of each period (weekly/monthly) rather than after work is done, since a retainer typically pays for availability as much as output.
- Milestone-based — a portion of a total project fee invoiced as defined phases are completed, common for longer engagements with a clear scope.
Being specific about what "an hour of consulting" covers
Vague line items like "Consulting services" invite questions. A short but specific description — "Strategy review call + follow-up notes, 2 hrs" — heads off back-and-forth before it starts, and doubles as a record of the engagement if a dispute ever comes up.
Payment terms that fit retainer work
Retainers are often billed Due on Receipt or with an advance payment, since the fee is meant to cover the upcoming period rather than reimburse work already completed — the logic is reversed from a typical Net 30 invoice for completed work.
Frequently asked questions
Should I invoice weekly or monthly for hourly work?
Either is normal — monthly is simpler to manage, weekly keeps cash flow steadier and surfaces scope creep sooner. Longer or higher-stakes engagements tend to favor more frequent invoicing.
How do I invoice for a milestone that's only partly done?
Generally, don't — invoice the full milestone amount once it's actually complete and agreed as done. Billing partial milestones tends to create ambiguity about what's actually owed.
Ready to send your first one?
Create a free invoice →