Marketing agencies, from solo consultants to teams of five or ten, invoice small and mid-size businesses for ongoing and project-based work. Typical line items include monthly retainers for social media, SEO, or paid ads management, one-time projects like a website or brand launch, and pass-through costs such as ad spend, stock assets, and software subscriptions.
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Most agencies use a mix of models. Monthly retainers are the backbone for ongoing work like SEO, content, social media management, email marketing, and paid media, and are usually priced as a flat fee tied to a defined scope or hours. Projects such as a brand identity, a website build, or a campaign launch are priced as flat fees, often billed in milestones. Hourly rates are used for consulting, strategy sessions, and out-of-scope requests. Paid media management is often priced as a flat fee or a percentage of ad spend (commonly 10-20%, with a minimum). Third-party costs like ad spend, stock photography, paid tools, and freelancers are either passed through at cost or with a modest markup, and should always appear as separate lines from your own fees.
| Service | Priced | Typical range |
|---|---|---|
| Agency hourly rate (strategy, consulting, ad hoc work) | per hour | $75-200 |
| Social media management retainer | per month | $750-3,500 |
| SEO retainer (small to mid-size business) | per month | $750-3,000 |
| Paid ads management (Google, Meta) | per month | $500-3,000 or 10-20% of ad spend |
| Email marketing management | per month | $500-2,000 |
| Content writing (blog posts, articles) | per piece | $150-600 |
| Brand identity package (logo, colors, guidelines) | flat fee | $2,000-8,000 |
| Marketing strategy and audit | flat fee | $1,000-5,000 |
Typical US ranges. Rates vary by region, experience, and job size.
| Description | Qty | Rate | Amount |
|---|---|---|---|
| Social media management retainer, June (12 posts, community management, monthly report) | 1 month | $1,800.00 | $1,800.00 |
| SEO retainer, June (on-page updates, 2 blog posts, keyword tracking) | 1 month | $1,200.00 | $1,200.00 |
| Google Ads management, June (fee on $3,000 ad spend at 15%) | 1 month | $450.00 | $450.00 |
| Google Ads spend, June (billed at cost, no markup) | 1 pass-through | $3,000.00 | $3,000.00 |
| Landing page copy revisions outside retainer scope | 3 hours | $110.00 | $330.00 |
| Stock photo licenses for June campaign | 1 pass-through | $89.00 | $89.00 |
| Total | $6,869.00 | ||
Notes: Payment due within 15 days of invoice date. Ad spend is billed at cost per the platform statement, available on request. Retainer covers the scope in the service agreement dated 1/15; additional requests are billed at $110 per hour. A 1.5% monthly late fee applies to balances past due.
Retainers are billed for a period of time, and clients need to match the invoice to the month's deliverables and reports.
Makes it clear what is included, which supports billing separately for out-of-scope work.
Clients often confuse the two. Separate lines prevent disputes and make your fee percentage easy to verify.
Stock assets, software, printing, and freelancer costs should be itemized so the client sees what is yours and what is third-party.
Extra work is the most commonly disputed line on an agency invoice. Specific entries make it easy to approve.
Mid-size clients often require a PO number or a specific accounts payable contact before they will process payment.
Shows which stage was reached (for example, 50% on design approval) and ties payment to the agreed schedule.
Retainers are usually invoiced at the start of the service month, or on the first of the month, and due on receipt or within 7-15 days. Project work commonly requires a 30-50% deposit before starting, with the balance split across milestones or due at launch. Net 15 or net 30 is typical for larger clients, though shorter terms protect cash flow. Many agencies charge a late fee of 1-1.5% per month and pause work or campaigns if an account is more than 15-30 days overdue, which should be stated in the contract. Ad spend is often collected in advance or charged directly to the client's own card on the ad platform so the agency does not front the money. ACH and credit card are the most common payment methods; card fees are sometimes passed on to the client.
Have clients put their own card on the Google or Meta account, or collect ad budget before the month begins. Floating thousands of dollars in ad spend while waiting on a net 30 invoice is a common way agencies get hurt.
State the number of posts, blog articles, reports, revision rounds, and meetings included each month. Vague retainers lead to scope creep, and a numbers-based scope gives you a clear basis for billing extra.
Invoice at the start of the month, not the end. Work such as campaign setup and content planning happens before results appear, and advance billing keeps you from carrying costs.
If the retainer includes a set number of hours or posts, say whether they roll over or expire. Putting it in the contract avoids arguments when a client has a slow month.
Retainers tend to stay frozen while workload grows. Build an annual increase clause of 3-8% into the agreement, and send notice 30-60 days ahead.
Most agencies bill ad spend at cost and charge a separate management fee, either flat or as a percentage of spend. Hidden markup on ad spend can damage trust if the client sees the platform statement. If you do add a markup on other pass-through costs like software or freelancers, disclose it in your agreement.
The start of the month is more common and better for cash flow, since much of the work is ongoing. Invoicing at the end makes sense only if you bill for variable usage, such as hours or ad spend that is not known until the month closes.
Point to the agreement. Retainers pay for work performed and deliverables, not guaranteed outcomes, unless you agreed to performance terms. Share your monthly report showing what was done and offer a strategy call to adjust the plan, but avoid discounting the invoice as a first response.
It depends on the state. Many states do not tax services, but some tax advertising, digital products, or certain marketing deliverables like printed materials. Check your state's rules or ask an accountant, and add tax to the invoice only where it applies.
Either include it in your fee as part of the deliverable or list it as a separate pass-through line, with or without markup. Whichever you choose, say so in your contract so the client knows how third-party work is billed.
Send a Marketing Agency estimate for approval, then turn it into an invoice when the work is done.
Marketing Agency estimate template