Marketing Agency Invoice Example: Annotated Template with Line Items

TL;DR: A marketing agency invoice should separate retainer fees from project work, break out media spend from agency fees, and itemize deliverables by campaign or channel. Below is a fully annotated example.

Sample marketing agency invoice

Payment Terms: Net 15. Wire transfer or ACH. Media spend is billed as pass-through and due regardless of campaign performance. Late payment suspends ad campaigns.

Notes: March performance report attached. Google Ads delivered 14,200 clicks at $0.85 CPC. Next month's media budget recommendation: $14,000 (pending approval).

Field-by-field breakdown

• From: Agency legal name, office address, and AP email address.
• To: Client company, billing contact (usually VP Marketing or Finance), and address.
• Account reference: Ties the invoice to a specific client account and campaign period.
• Retainer line: A flat monthly fee covering strategy, meetings, and account management.
• Deliverables: Each content type (blog posts, emails, videos) on its own line with quantity and per-unit rate.
• Management fee vs. media spend: Always separate the agency fee (your revenue) from the media budget (pass-through). This is industry standard and clients expect it.
• Tax: In Texas, advertising services are taxable but media spend passed through at cost may be exempt. Consult your accountant.

Common line items for marketing agencies

Variations

• Retainer only: Some agencies bill a single retainer line that covers all services. Attach a work summary for transparency.
• Project-based: One-off campaigns billed as a flat project fee with milestone payments.
• Commission model: Agency earns a percentage of revenue generated. Invoice shows the base fee plus commission calculation.
• International clients: Add currency, VAT registration, and reverse-charge notes if applicable.

Tips for marketing agency invoicing

1. Always separate media spend from agency fees -- mixing them obscures your actual revenue and confuses clients.
2. Attach performance reports with every invoice to reinforce the value you deliver.
3. Invoice on the 1st for the prior month to keep cash flow predictable.
4. Include a clause that late payment pauses ad campaigns -- it motivates timely payment.

FAQ

Q: Should we bill media spend in advance or arrears? A: Most agencies bill media spend in advance (before the ads run) to avoid fronting the cost. Clearly state this in your contract and on the invoice.

Q: How do we handle scope creep on retainer accounts? A: Define what the retainer covers in your SOW. Additional deliverables beyond the scope should be invoiced as separate line items at your standard rates.

Q: Is media spend taxable? A: In most states, true pass-through media spend is not taxable if billed at cost without markup. Your agency fee is taxable where advertising services are taxed. Confirm with your accountant.

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