The short versionA marketing agency does five things: figures out what to say, makes the stuff that says it, buys the attention to put it in front of people, measures what happened, and adjusts. Most businesses can do one or two of those well. Almost nobody can do all five at once while also running the business.
"Marketing agency" is a vague job title. People picture either an ad man in a corner office or a college kid posting to Instagram. Here’s the actual work.
What you’ll learn in this post
- The five things an agency actually does
- What a normal month looks like on a retained account
- Agency vs. in-house hire vs. freelancer, with real costs
- What agencies shouldn’t charge you for
- How to tell a good one from an expensive one
The five things
1. Strategy — deciding what to say and to whom. Who’s the buyer, what do they already believe, what’s the one thing that would move them, and which channels reach them. This is the part that gets skipped, and it’s the part that determines whether the other four matter.
2. Creative — making the stuff. Video, photography, ad copy, landing pages, email, the website itself. Not art for its own sake. Assets built to do a job.
3. Media — buying the attention. Google, Meta, YouTube, OTT and connected TV, broadcast, programmatic. Setting budgets, building audiences, writing the bidding rules, and killing what isn’t working before it burns the month.
4. Measurement — finding out what happened. Conversion tracking that actually fires, call tracking, attribution that isn’t fantasy, and a report a human can read.
5. Iteration — changing things on purpose. The first version of anything is a hypothesis. The value of an agency compounds in month four, not week two.
Anybody can run an ad. The job is knowing which ad, to whom, for how much, and when to stop.
What a normal month actually looks like
Not a mystery. Here’s the cadence on a typical retained account:
- Daily: media checks. Spend pacing, cost per lead, anything that broke overnight.
- Weekly: creative in production, ad copy and audience adjustments, landing page fixes, a short internal review of what moved.
- Monthly: a reporting call. What we spent, what came in, what it cost per lead, what we’re changing and why.
- Quarterly: the bigger conversation. Is the strategy still right, is the offer still right, do we need new creative in the pipeline.
- Once or twice a year: a production day — a Content Event — that refills the asset library so we’re not running the same three videos for eighteen months.
Agency vs. in-house vs. freelancer
| In-house hire | Freelancers | Agency | |
|---|---|---|---|
| Annual cost | $65k–$95k + benefits | $15k–$50k | $36k–$120k retainer |
| Skills covered | One or two | One each | All five |
| Who manages it | You | You | Them |
| Coverage if they quit | None | None | Bench |
| Media buying tools | You buy them | Rarely | Included |
| Ramp time | 3–6 months hiring | Immediate | 2–4 weeks |
The honest version: one in-house marketer is great if you already know your strategy and mostly need execution in one channel. Freelancers are cheapest and hardest to keep pointed the same direction — six logins, three brand voices, zero accountability. An agency costs more than a freelancer and less than a full department, and the reason it works is coordination, not headcount.
What an agency should never charge you for
- Access to your own accounts. Your ad accounts, analytics, domain, and website should be in your name.
- A percentage markup you can’t see. You should know what’s media spend and what’s management fee.
- Reports nobody reads. A 40-page PDF of impressions isn’t a deliverable.
- "Strategy" that’s a slide deck and nothing else. Strategy shows up in the work or it didn’t happen.
- Long lock-in contracts. A 90-day kickoff makes sense. A two-year contract protects the agency, not you.
If you can’t tell what you’re paying for, you’re paying too much for it.
How to tell a good one from an expensive one
Good agencies ask uncomfortable questions before they quote: what’s a customer worth to you, what happens to a lead after it comes in, what have you already tried. Expensive ones lead with a package. If nobody asked about your sales process, they’re selling you activity, not results.
Frequently asked questions
How much does a marketing agency cost per month?
Management retainers for small and mid-sized businesses generally run $3,000 to $10,000 a month, separate from ad spend. Project work like a website or a video shoot is quoted on its own. Anything under about $2,000 a month usually buys reporting and not much doing.
Is a marketing agency worth it for a small business?
It’s worth it when the work is bigger than the time you have and the outcome is bigger than the fee. If you can’t fund at least six months of consistent effort, fix that first — underfunded campaigns produce inconclusive results, not cheap ones. We wrote about that in why "let’s start small" fails.
How long before I see results?
Paid media can produce leads in the first 30 days. Reliable signal takes about 90. SEO and brand-building compound over six to twelve months. Anyone promising faster is either lucky or lying.
What’s the difference between a retainer and a project?
A project has a finish line — a website, a video, a campaign launch. A retainer buys ongoing management, which is what channels like paid media and SEO actually require to work.
How do I fire an agency?
Read the notice clause, put it in writing, and before you send it, make sure your accounts are in your name and you have admin access. Getting locked out of your own Google Ads account is the most common ugly divorce in this business.
If you want the honest version of what your situation needs, start a conversation. See what we handle on our services page.