Invoice Template for Marketing Agencies
Agency billing has one cardinal rule: never blur your fee with the client’s media spend. The invoice that separates retainer, project fees, ad budget pass-through, and tools recharges is the invoice that survives the client’s CFO, and the relationship.
This template structures monthly retainers with scope summaries, campaign projects by deliverable, and media spend as transparent at-cost lines (or clearly-stated percentage-of-spend fees). When the client doubles ad budget, your invoice shows exactly what changed and what didn’t.
What to include on this invoice
- Retainer period and headline scope (channels, hours, deliverables)
- Project work as separate deliverable-named lines
- Ad spend pass-through at cost with platform breakdown
- Management fee basis if percentage-of-spend
- Tool/software recharges itemized
- Reporting reference (link or attachment) for the period
Example line items
| Item | Description |
|---|---|
| Monthly retainer, June 2026 | SEO + content: 4 articles, link outreach, reporting |
| Campaign: summer launch | Creative, landing page, and email sequence |
| Ad spend pass-through | Meta + Google, at cost, dashboards attached |
| Management fee | 12% of managed spend, as contracted |
Billing tips
Attach the performance report to every retainer invoice, paying feels different when results are stapled to the bill.
Invoice ad-spend deposits in advance; never float a client’s media budget on your card.
Name campaign lines after the campaigns the client knows ("Summer launch"), not internal job codes.
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Frequently asked questions
How do agencies invoice ad spend?
Either the client pays platforms directly (cleanest), or you pass spend through at cost as its own line with the platform breakdown, plus your management fee stated separately.
What should a retainer invoice include?
The period, the scope headline (channels, volume, hours), and a reference to that period’s report. Vague "marketing services" lines are churn generators.
Percentage-of-spend or flat fee?
Flat retainers suit steady scopes; percentage-of-spend aligns incentives on heavy paid-media accounts. Whichever you use, print the basis on the invoice.
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