Agency Invoice Template
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What is a agency invoice?
An agency invoice is a bill from a creative, marketing or digital agency that separates the agency's fee from money spent on the client's behalf, such as media, licences or subcontractors.
The defining feature of an agency invoice is that not all of the money on it is yours. Media spend, licences, print and subcontractor costs pass through the agency to someone else, and the invoices that survive procurement are the ones where fee and pass-through are unmistakably separate — including how any markup is handled.
Who it’s for: Marketing, advertising, creative, digital, PR and design agencies billing clients on retainers and projects.
How agencys usually bill
- Monthly retainer
- One line naming the retainer and the month, invoiced on a fixed date. Where the retainer covers a scope of hours, note usage against it so scope conversations happen monthly rather than at renewal.
- Project fee
- One line per phase or deliverable, named as the statement of work names it. Split large projects across milestone invoices so cash arrives during the work rather than after it.
- Media and ad spend
- Pass-through media on its own line at the amount actually spent, with the management fee as a separate line. Bundling the two hides your fee and makes the invoice impossible for procurement to approve.
- Third-party and production costs
- Print, photography, licences, freelancers and production, each on its own line at cost, with any markup stated as agreed in the contract rather than folded silently into the amount.
What to put on a agency invoice
Beyond the fields every invoice needs, these are the ones that decide whether this kind of invoice gets approved quickly:
- Client purchase order number
- Agency clients are usually large enough to run procurement. No PO number means no payment, and often no acknowledgement either.
- Campaign, project or cost-centre code
- Marketing teams reconcile against campaign budgets. A code in the line description gets the invoice to the right budget holder without a forwarding chain.
- Fee and pass-through, split
- Procurement checks the ratio, and pass-through costs may need separate approval or be excluded from a fee cap. Merging them is the fastest way to have an invoice queried.
- Markup, stated
- If your contract allows a percentage on third-party costs, show it as its own line. Markup discovered later damages the relationship far more than markup disclosed on the invoice.
- Billing period
- Retainers and media spend are billed for a period. Stating it prevents month-boundary disputes about which invoice covers which campaign.
Example: an agency invoice with retainer, media and production
A digital agency billing a monthly retainer alongside pass-through media spend and a production cost:
| Description | Qty | Rate |
|---|---|---|
| Digital retainer — March 2026 (SOW-14, campaign code MKT-2026-Q1) | 1 | 8,500.00 |
| Paid media spend, March (pass-through, at cost — platform statements attached) | 1 | 22,400.00 |
| Media management fee, 10% of spend (SOW-14, cl. 6) | 1 | 2,240.00 |
| Video production, freelance editor (pass-through, at cost) | 1 | 1,800.00 |
Spend, fee on spend, and production are three separate lines, each naming its authority. Procurement can approve the pass-through against platform statements and the fee against the contract clause without contacting anyone.
Separating agency fees from pass-through costs
Pass-through money is the client's, held briefly by you. On the invoice it should be at cost, labelled as pass-through, and supported by the underlying statement or receipt. Your fee on it — whether a percentage of spend or a flat management fee — belongs on its own line quoting the contract clause that permits it. Beyond keeping procurement happy, the split protects you: when a client questions costs, an invoice that already separates their money from your fee turns a credibility problem into an arithmetic one.
Getting through client procurement
Agency invoices are usually approved by someone who has never met your team. Quote the purchase order number, use the exact legal entity name procurement gave you rather than the brand name your day-to-day contact uses, put the campaign or cost-centre code in the line descriptions, and issue one invoice per purchase order. If the client uses an accounts payable portal, submit there as well as emailing your contact — invoices that only exist in an inbox do not get into payment runs.
Retainers, scope and overage
Retainer invoices look identical month to month, which is exactly why scope drift stays invisible until renewal. Recording usage against the retainer in the notes — hours or deliverables used against those contracted — makes overage a monthly conversation instead of an annual argument. When you do bill overage, put it on its own line referencing the clause that allows it and the approval that authorised it, rather than increasing the retainer line.
Frequently asked questions
What should an agency invoice include?
An agency invoice should include your agency's business and tax details, the client's legal entity and billing address, their purchase order number, a unique invoice number, the issue and due dates, the billing period, separate lines for agency fees and for pass-through costs at cost, any contractually agreed markup or management fee on its own line, the campaign or cost-centre reference, tax, and the total due.
How should I invoice client ad spend?
Bill the media spend as its own pass-through line at the amount actually spent, and put your management fee on a separate line referencing the contract clause that sets it. Keep the platform statements available as support. Bundling spend and fee into one figure hides your margin and will usually be rejected by procurement.
Should agency markup be shown on the invoice?
Yes, if your contract provides for it. Show it as a separate, labelled line rather than adding it silently to the cost of the third-party item. Disclosed markup is a normal commercial term; markup discovered during a client audit is a relationship problem.
How do I bill a monthly agency retainer?
Create one line naming the retainer and the month it covers, invoiced on the same date each month against the client's purchase order. Note usage against the contracted scope, and bill anything beyond it as a separate, approved line rather than by increasing the retainer amount.
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Related invoice templates
- Consulting Invoice TemplateA consulting invoice is a bill for advisory or professional services, usually tied to a retainer, a number of days, or a milestone in an engagement rather than to a physical deliverable.
- Small Business Invoice TemplateA small business invoice is a bill issued for goods or services that records what was supplied, the tax charged, and when payment is due under the customer's agreed terms.
- Freelance Invoice TemplateA freelance invoice is a bill a self-employed person sends a client for completed work, showing the hours or deliverables, the agreed rate, and the total due by a stated date.