Free Retainer Invoice Template Invoice Template
A retainer invoice bills a client a fixed recurring fee, usually monthly, to reserve your availability or a set block of services. Download our free retainer invoice template in Word, Excel, PDF, Google Docs, and Google Sheets, set the retainer amount and billing period, and send predictable invoices that keep your cash flow steady. It works for agencies, consultants, and professionals on ongoing engagements.
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| Description | Qty | Unit price | Amount |
|---|---|---|---|
| Monthly retainer - marketing services (June 2026) | 1 | $2,500.00 | $2,500.00 |
| Included hours: up to 20 hrs/month | 1 | $0.00 | $0.00 |
| Overage hours beyond retainer - 3 hrs @ $95/hr | 3 | $95.00 | $285.00 |
| Out-of-scope project work (approved) | 1 | $450.00 | $450.00 |
| Reimbursable ad spend / pass-through costs | 1 | $300.00 | $300.00 |
| Subtotal | $3,535.00 | ||
| Sales tax (8%) | $282.80 | ||
| Total | $3,817.80 | ||
Example figures — every field is editable in the download.
Who uses this template
- ✓Marketing and creative agencies
- ✓Lawyers and legal consultants
- ✓Fractional CFOs and bookkeepers
- ✓IT/managed service providers
- ✓PR and communications consultants
What to include
- ✓Your business name, EIN, and contact info
- ✓Invoice number and the billing period (month)
- ✓Client name and engagement/contract reference
- ✓Retainer amount and what it covers (hours or scope)
- ✓Any overage hours and the overage rate
- ✓Out-of-scope or pass-through charges
- ✓Subtotal, tax if applicable, total, and payment terms
Available in 5 formats
Word (.docx)
Fully editable in Microsoft Word, Google Docs, Apple Pages and LibreOffice — best for quick text edits.
Excel (.xlsx)
Line totals, subtotal and tax calculate automatically — best if you want the math done for you.
A clean, print-ready, fixed layout — best for emailing a finished invoice to a client.
Google Docs / Sheets
Open in your browser, then File → Make a copy to edit and share with your team.
Invoicing tips for retainer invoice template
- ✓ State exactly what the retainer covers each period (hours or deliverables) so scope is clear.
- ✓ Bill overage hours and out-of-scope work on separate lines at an agreed rate.
- ✓ Invoice on the same day each month and use due-on-receipt or Net 15 terms for steady cash flow.
- ✓ Clarify whether unused hours roll over or expire at the end of the period.
- ✓ For legal/trust-style retainers, keep prepaid funds separate and only invoice against work performed.
Retainer Invoice Template invoice FAQ
What is a retainer invoice?
It is a recurring invoice that charges a fixed fee, typically monthly, to secure your ongoing availability or a defined scope of work. It gives both you and the client predictable, budgeted billing.
How do I handle work beyond the retainer scope?
List overage hours or out-of-scope tasks as separate line items at a pre-agreed rate. Document the approval so the client expects the additional charge on top of the base retainer.
Do unused retainer hours roll over?
That is up to your agreement. Many firms make hours use-it-or-lose-it each month, while others allow limited rollover. State the policy in your contract and reference it on the invoice.
Is a retainer the same as a deposit?
Not quite. A deposit is a one-time upfront payment toward a specific project, while a retainer is a recurring fee that reserves ongoing services. Some professional retainers are also held in trust and drawn down as work is done.
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