Most small businesses should plan to spend somewhere between 5 and 10 percent of revenue on marketing, closer to 5 if you are holding steady and closer to 10 or more if you are trying to grow fast or enter a new market. The better way to set the number is backwards from growth: decide how many new customers you need, work out what one costs you to win, and fund that, then check every quarter whether it is paying back.
This is one of the first questions founders ask me, and it is usually asked the wrong way round. People want a number, so they search for a percentage, pick one, and then spend it on whatever an agency or a salesperson suggests. The percentage is a useful guardrail. It is not a plan. Here is how I would set the budget if I were running your marketing.
The figure you will see quoted most often comes from the U.S. Small Business Administration, which has long suggested that small businesses with under $5 million in revenue spend around 7 to 8 percent of gross revenue on marketing, assuming healthy margins. Larger companies spend in a similar range: Gartner's 2024 CMO Spend Survey put average marketing budgets at 7.7 percent of company revenue.
Those numbers are averages across very different businesses. A company that grows mainly through referrals can spend far less. A company entering a crowded market, or one with high lifetime customer value and a long sales cycle, often needs to spend more for a while. Treat the 5 to 10 percent range as the zone where most healthy small businesses land, not as a target you must hit.
The budget that actually works comes from your own numbers. You need four of them, and rough estimates are fine to start:
Divide the revenue target by what a customer is worth and you have the number of customers you need. Divide that by your close rate and you have the leads you need. Multiply by your cost per lead and you have a budget grounded in your own business. If that number is wildly above 10 percent of revenue, the target or the funnel needs work before the spend does. If it is far below, you may be underinvesting in growth you could have.
When founders tell me they spent plenty and got little back, the cause is usually one of these:
To find out which one applies, trace your last ten customers back to where they first heard of you, and compare that list to where your money went last quarter. The mismatch is usually obvious. This guide walks through the full check.
A simple split I use as a starting point: put most of the budget, around 70 percent, into the one or two channels already proven to bring in your best customers. Put about 20 percent into the next most promising channel, run as a real test with a clear goal and an end date. Keep the last 10 percent for experiments. Then move money every quarter based on cost per qualified lead and pipeline created, not on which channel feels busiest.
Remember to separate strategy from execution. Ad spend, content and agency fees are execution. Someone still has to decide what the plan is and what to stop, and that is the part most small businesses skip.
A full-time CMO typically costs $280,000 to $450,000 a year before benefits and equity, which is out of reach for most small businesses. A fractional CMO gives you the same ownership of the plan and the numbers part time. At MarkCMO that runs $2,500 to $50,000 a month depending on scope, with most clients at $8,000 to $15,000 a month, month to month with no long contract. The full breakdown is on the fractional CMO cost page. If you are spending real money and cannot say what it returns, that is usually the point to get help. I run every account myself, I have spent 15 years leading marketing and operations, and I target first results within 30 days.
Use the percentage as a sanity check and the customer math as the real plan. A percentage of revenue tells you what is affordable. The customer math tells you what the growth target actually needs. If the two numbers are far apart, that gap is the conversation to have: either the target is too high for the budget, or the budget is too low for the target. Then set a fixed monthly amount and review it every quarter.
It should, at least when you are deciding whether marketing pays. Ad spend is only part of the cost. Agency retainers, freelancers, a marketing hire, software and your own time all go into what it really costs to win a customer. Many founders only count media and then wonder why marketing feels expensive. Count everything once so you know the true number, even if you report media separately.
Spend less, but spend it on fewer things. A small budget spread across six channels does nothing anywhere. Put it into the one or two places your best customers already come from, often referrals, your website and direct outreach, and make sure every lead is tracked. Prove one channel pays back, then add budget from the profit it creates instead of from hope.
Leading signals show up within weeks: more qualified leads, more booked calls, a lower cost per lead. Revenue takes longer, because it depends on your sales cycle. If you sell in a week, you will know in a month or two. If deals take six months, judge each channel on pipeline created first, and on revenue after a full sales cycle has passed.
MarkCMO provides the strategy and the roadmap, and then delivers it across three tiers, so you get direction and execution from one team instead of handing a deck to someone else to build.
Fractional CMO and COO leadership: strategy, positioning, go-to-market, and the roadmap that sets the direction.
Running the function day to day: managing teams, vendors, budgets, and the operating cadence that keeps the plan on track.
Hands-on delivery: marketing execution, software development, tech-stack build and integration, plus finance and operations support, everything a business needs to scale.
From tech to marketing to finance, strategy through execution, MarkCMO can lead it, manage it, and build it.
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