Ad agency billing mixes retainers, media costs, and project work. Everhour keeps the time and reporting behind each invoice organized.
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Ad agencies usually need invoices for monthly retainers, project milestones, campaign production, paid media management, and pass-through expenses. The job is to give the client a document that matches the agreement, separates service fees from reimbursable costs, and gives finance enough detail to approve payment without a long email thread.
For example, one invoice can include a monthly social media retainer, a separate line for landing page creative, reimbursed stock photography, and a payment term of net 30. If the agreement includes billable hours, the invoice should also show the rate structure clearly, either a blended agency rate or specialist rates by role.
Agency invoices start with the pricing model in the client agreement. Hourly billing uses billable hours multiplied by a rate. Retainer billing uses a pre-negotiated monthly fee, often paid upfront, for defined deliverables or a capped level of involvement. Project fees commonly reflect expected hours multiplied by blended or specialist rates, with a buffer for uncertainty.
Performance-based billing needs extra care because compensation ties to an agreed metric or varies based on results. The invoice should name the KPI and measurement period from the contract. A campaign invoice that bills a performance fee without the measurement window, source data, or agreed metric creates avoidable approval friction.
Ad agency invoices work best when service fees, campaign deliverables, reimbursable expenses, media costs, and production costs sit on separate lines. That split matters because agency pricing should account for expenses and operating margin, while client agreements often treat pass-through costs differently from agency labor or creative fees.
Asset identifiers also matter when the invoice covers finished advertising materials. AD-ID codes identify advertising assets and connect metadata such as title, length, and product information. Standard-definition ads use 11-character codes, while high-definition or 3D ads use 12-character codes. Include the relevant code beside the spot, version, or deliverable when the client needs asset-level matching.
A free invoice document is enough for a single project, a simple retainer, or a client that only needs a summary with clear payment terms. It works when the source numbers are already approved, the media costs are final, and the agency does not need a durable history of uninvoiced work.
A managed workflow fits agencies that bill multiple clients, combine retainers with billable hours, or need project profitability reporting before invoices go out. Everhour Reporting can group and filter logged work across clients, projects, members, and billable status, then export reports for review. That reporting layer gives finance cleaner support for invoices built from tracked agency work.
This content is for general information only, may not be fully up to date, and is provided without any warranty or liability.
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An ad agency invoice should include the agency and client details, invoice date and number, payment terms, service lines, campaign or project references, reimbursable expenses, taxes where applicable, and the amount due. Use separate lines for retainers, billable hours, media costs, production costs, and pass-through expenses when the client agreement treats them differently.
The invoice should follow the pricing model in the contract. Hourly work usually needs billable hours, roles or rates, and the billing period. A fixed project fee or retainer can show the total fee, but agencies often add a short deliverable summary so the client can connect the charge to completed work.
Pass-through media costs should appear separately from service fees when the client agreement treats them as reimbursable or billed at cost. List the platform, campaign, period, or purchase description clearly. That structure keeps the agency's labor revenue distinct from third-party spend and reduces disputes over margin, reimbursement, and approval.
The United States has no prescribed federal private-sector invoice form and no national VAT or GST invoice regime. For ordinary businesses, invoices mainly support recordkeeping and contract enforcement. Sales and use tax depends on state and local rules, nexus, service taxability, and where the sale is sourced.
Net 30 is common and means full payment is due within 30 days. Early-payment terms such as 1%/10 net 30 give a discount if the client pays within 10 days. The invoice should match the signed agreement, especially for retainers paid upfront, milestone invoices, or media costs due before launch.
Everhour Reporting lets agencies build reports with 45+ columns, filters, grouping, date ranges, and exports. A finance lead can review billable time, non-billable time, client, project, member, task, cost, revenue, profit, and invoice status before an invoice is sent.
Everhour Billing & Invoicing converts tracked billable time and expenses into client invoices. Teams can select uninvoiced time, preview the breakdown, group line items by project, task, person, or date, and exclude non-billable work before sending the invoice to accounting.
Track approved client work, review reporting by project, and turn billable agency time into invoices. Everhour gives ad agencies cleaner billing support from timesheet to invoice.
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