Reference the engagement
Add the client, engagement, billing period, and invoice number.
Consulting billing
Consulting Invoice Generator
Bill advisory work by the hour, day, milestone, or retainer with an invoice that makes scope and payment terms easy to approve.
3 invoice templates Review before sending
Built for this workflow
Support hourly, daily, fixed-fee, milestone, and retainer billing
Connect each charge to an agreed deliverable
Keep reimbursable expenses separate from professional fees
Common line items
- • Advisory hours
- • Workshop day rate
- • Project milestone
- • Monthly retainer
Simple billing workflow
From completed work to a client-ready PDF
The generator keeps the calculation and layout in one place, while leaving you in control of the underlying business details and tax treatment.
Describe delivered value
Use concise line items for time, milestones, or retained access.
Clarify payment
Set the due date and include purchase-order or remittance notes.
Questions about consulting invoice generator
Should consulting invoices show hours?
Show hours when billing hourly. For fixed-fee work, identify the milestone or deliverable instead.
Can I include a purchase order number?
Yes. Put the purchase order or engagement reference in the notes so accounts payable can route it correctly.
How do I invoice a retainer?
Describe the retainer period and what access or services it covers, then state when the next period will be billed.
Create the invoice while the work is still fresh
Add the client, itemize the work, choose a design, and download a polished PDF.
Open the invoice generator