A small business marketing budget works less like a single number and more like a utility bill with three meters: what you pay the platforms to show your ads, what you pay to produce photos, video and design, and what you pay for someone’s time to run it all.
Set it by listing what each meter needs to reach one goal over the next 12 months, then compare the total with the revenue it brings in, every month.
That is also what the U.S. Small Business Administration asks for in a marketing plan: a complete breakdown of costs, ongoing tracking, and a comparison of marketing and sales costs with the revenue they generate.
Is there a percentage rule?
You will find percentage-of-revenue rules all over the internet, and search results quote several of them. They describe what other companies spend, not what yours needs to reach its goal.
The SBA’s own guide to marketing and sales does not hand out a percentage. It asks you to “include a complete breakdown of the costs of your marketing plan,” keep tracking them, and compare them with revenue. Build the list first and use any percentage only as a sanity check afterward.
The three layers every budget has
Most confusion about marketing money comes from mixing these layers in one line. Separate them and every proposal, invoice and report becomes easier to read.
| Layer | What it buys | Fixed or flexible | Who gets paid | What moves it up or down |
|---|---|---|---|---|
| Media (ad spend) | Ads on Facebook, Instagram, Google | Flexible: you can raise, lower or pause it | The ad platform, charged to the payment method on your ad account | Competition for the same audience, size of the area you serve, season |
| Production | Photos, video, design, copywriting | Per project or monthly | A freelancer, an agency or your own staff | Shoot days, number of posts and reels, rounds of edits |
| Management | Planning, posting, running campaigns, reporting | Usually a fixed monthly amount | An employee, an agency, or your own hours | Number of channels, posting frequency, whether paid campaigns are included |
| Tools | Scheduling, design apps, email, call tracking | Fixed monthly or yearly | Software companies | Number of users and features |
Your own hours count, even when no check goes out. If you post at night after closing, write those hours down; they are the management layer, paid in time.
The media layer behaves differently on each platform. If Meta is part of the plan, our guide to Facebook ads for small business covers how those campaigns are set up. For the management layer, it helps to know what a marketing agency does each month, so you can compare that with doing it yourself.
What makes each layer bigger or smaller
No honest article can tell you the right amount without knowing your business, because the amount depends on a handful of factors you can list today:
- The goal. Getting known in a new neighborhood needs reach; filling a calendar with bookings needs people who are ready to act.
- The area you serve. One zip code is a smaller audience than the whole stretch from Mount Pleasant to Summerville.
- Competition. When more businesses want the same people, ad space for that audience costs more.
- Content volume. Four reels a month need more production than four photos.
- Number of channels. One channel run every week often beats four channels run when there is time.
- Your starting point. A business without a logo, photos or a working website pays for those foundations before campaigns can do their job.
Build it in five steps
- Pick one goal you can count. Calls, bookings, quote requests or visits, with the number you want by the end of the year. The SBA’s example goals include increasing sales “by a certain percent.”
- Work out what a new customer is worth to you: the typical sale times the number of times a customer comes back. That tells you how much you can afford to spend to win one.
- Choose the channels where your customers already are, and keep the list short.
- Fill in the layers month by month, twelve columns, one row per line item.
- Put a monthly review on the calendar to compare costs with the revenue they brought in.
The budget is one section of a larger document. If you have not written one yet, start with our marketing plan for small business checklist and come back to the numbers.
Fixed, flexible and test money (the 70:20:10 idea)
The 70:20:10 rule in advertising is a heuristic: most of the money on what already works, a smaller share on promising ideas, and a small slice on experiments. For a small business the useful part is the idea, not the exact split.
Protect the fixed layers (management and tools) so the work does not stop the first slow month. Let media flex with results and with the season. Keep one test line for a single new thing at a time, such as a new platform or a new type of video, so you can tell what changed.
Plan for Charleston’s seasons
The calendar itself belongs in your marketing plan: your busiest and slowest months, the local events, and the Atlantic hurricane season, which runs from June 1 to November 30 according to NOAA's National Hurricane Center. The budget's job is to turn those dates into money that can move.
In practice that means three things. Spread the fixed layers evenly across twelve months. Shape the media line like your sales curve, higher ahead of the busy months and lower in the quiet ones. And hold a small reserve, between June and November, for the messages nobody schedules: a storm closure, new hours, a reopening.
How to tell whether the money is working
Compare what you spent with what came back, channel by channel, every month. The SBA frames it as making sure you are “getting a positive return on investment.”
That takes two kinds of numbers. The marketing side (reach, clicks, messages, calls, form leads) comes from the platforms or your agency; our monthly Performance Report, for example, covers reach, engagement and conversion data for every campaign. The sales side (who bought, and how they heard about you) only you have, so ask new customers and write it down.
Reading an agency proposal: fees, ad spend and ownership
Before you compare two proposals, put them on the same three layers. Four questions make the difference visible:
- Is ad spend included in the quote, or paid to the platform separately?
- Who owns the ad accounts, the pages and the photo and video files?
- What exactly is in the monthly scope: posts, reels, shoot days, campaigns, the report?
- What happens if you pause during a slow season?
At FB Digital Agency, a marketing agency in Charleston, the scope is set by plan. Start covers social media management, video and photo production, performance marketing campaigns, branding and logo design, and the monthly performance report.
Premium adds paid traffic management, sales support and training, expert consulting and full social media. What a proposal comes to depends on that scope and on your goal; the plans are listed without prices, and the quote is made for your scope.
See the Start and Premium plans and ask for a proposal built on your goal.