Retainer Invoice
A retainer invoice template for monthly services. Bill a fixed amount for a defined scope of work, month after month, without friction. Example amounts are illustrative — replace them with your own.
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Invoice
| Invoice # | INV-001 |
| Issued | Sep 13, 2026 |
| Due | Sep 27, 2026 |
Billed to
| Description | Qty | Rate | Amount |
|---|
| Subtotal | $0.00 |
| Tax (0%) | $0.00 |
| Total due | $0.00 |
Notes
Payment due within 14 days. Thank you for your business!
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When to use this template
Use this template whenever you charge a client a recurring monthly (or quarterly) fee for ongoing services — marketing, development, consulting, or design retainers.
Fields to include
- Your details and the client's details
- The billing period covered
- A fixed retainer line item
- The scope summary in notes
- Any overage or add-on lines
Sample line items
- Monthly retainer — August (as agreed)1 × $2500.00 = $2500.00
- Overage — 3 extra hours3 × $75.00 = $225.00
Practical tips
- State the period covered (e.g., 'August 2026') on every retainer invoice.
- Describe the included scope in the notes so expectations stay aligned.
- Bill the same amount each month unless the scope changes in writing.
Frequently asked questions
What is a retainer invoice?
A retainer invoice bills a recurring fee for reserved capacity or ongoing services — typically a fixed monthly amount for a defined scope of work.
Should I bill retainers in advance or arrears?
In advance is common: the client pays for the upcoming month, so you're never working on credit. State your preference in the agreement.
How do I handle hours above the retainer?
Agree on an overage rate in advance and invoice anything above the included hours as a separate line item, as shown in the example above.
Create your own retainer invoice
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