How Much Should a Small Business Spend on Marketing? Start With Margin, Not a Percentage

A small business marketing budget is usually set as a percentage of revenue, and the published percentages range from about 1% to nearly 43% depending on who was surveyed and what was counted. The useful number comes from gross margin and the cost of one customer, not from an industry average.

Two documents do most of the work below: The CMO Survey's 2026 topline report and the U.S. Small Business Administration's own marketing-budget page. Both are cited by nearly every article on this question, and both say something narrower than the articles claim. Figures here are as of September 2026.

What the published percentages actually say

The CMO Survey's 2026 topline report puts marketing expenses at a mean of 8.96% of company revenues and a median of 5%, across a reported range of 0% to 42.99%. The mean is the figure that gets quoted as a benchmark. The median is the one that describes a typical firm.

A mean sitting nearly four points above its median is being pulled by a tail. At the top of that range a respondent reports 42.99% of revenue, which describes a funded growth company or a firm counting salaries and software inside the marketing line. Half the respondents sit at 5% or below. Quoting the mean at a business with twenty employees imports the spending of companies that share none of its constraints.

What the SBA page actually says, and what it does not

The SBA's marketing-budget page does not recommend a percentage. Its own first answer is that no fixed one exists: "There's no hard and fast answer to how much your marketing budget should be," says the agency's page, How to Get the Most From Your Marketing Budget. The percentages it reports are averages credited to other publishers.

Those averages are worth reading for what they are. The page reports 1.08% of revenue spent on advertising, crediting Small Business Trends, alongside 2018 marketing averages of 7.9% overall, 6.9% for B2B services companies and 11.8% for B2C services companies. The page itself is dated July 2019. The band that circulates under the SBA's name, 7% to 8% of revenue for firms under $5 million with margins of 10% to 12%, is not how the page frames its numbers, and a 2018 average is not guidance for 2026.

The gap between 1.08% and 7.9% on one page is also the clearest evidence that these numbers measure different things. One counts advertising. The other counts marketing, which in most surveys includes staff, software, agencies and production. A percentage is meaningless until you know which of the two it is.

Why a percentage of revenue is the wrong first number

A percentage of revenue ignores the constraint that decides affordability: marketing is paid out of gross margin, not revenue. A business at a 25% gross margin spending 8% of revenue on marketing is spending nearly a third of its margin. A business at a 70% margin spending the same 8% is spending about a ninth of its margin.

Run that conversion before arguing about the percentage. Take last year's revenue, subtract the direct cost of delivering the work, and you have the pool marketing competes in, alongside rent, payroll, overhead and profit. Two businesses with identical revenue and different margins do not have the same budget, and no survey mean knows which one you are. A high-ticket, low-volume service business and a high-volume retailer can sit on the same revenue line and belong at opposite ends of that 0% to 42.99% range.

The two numbers that actually size the budget

Two numbers size a marketing budget: the gross margin one new customer contributes over the time they stay, and what it currently costs to acquire one. The first sets the ceiling you can pay per customer. The second says whether the channel you are buying clears it. A growth target turns the pair into a monthly figure.

1. 1Take the average first job or first visit, multiply by how many times a typical customer returns in a year, then multiply by your gross margin percentage. That is the margin one customer contributes.
2. 2Divide last year's total marketing spend by the number of new customers it produced. That is your current cost per customer, blended across everything you did.
3. 3Decide how many new customers the next twelve months need. Multiply by the cost per customer. That is the budget your goal implies, and it is often nothing like the percentage you were about to use.
4. 4Compare step three against step one. If acquiring a customer eats most of the margin that customer contributes, the constraint is conversion or retention, and more budget buys more of the same loss.

Most owners cannot complete step two, because nobody recorded which marketing produced which customer. That is the real reason the percentage question gets asked: a percentage is what you fall back on when you cannot compute the number that would answer it properly.

How the answer moves with stage and market

Stage moves the number more than industry does. A business with no reputation in a market pays for attention that an established competitor gets free from referral and repeat work, so early spend runs high as a share of revenue and falls as that base compounds. A crowded, growing market slows the decline.

Charlotte is a growing market on the Census Bureau's own numbers. Its Vintage 2025 city estimates report that Charlotte gained 20,731 residents between July 2024 and July 2025, the largest numeric gain of any US city, while faster percentage growth sat in smaller places around it such as Fort Mill. Population growth means a steady supply of people with no provider yet chosen, and it also means competitors spending to reach them first. Neither effect appears in a national survey mean, which is a further reason to size the budget from your own numbers.

What this looks like when it runs

Sizing a budget this way needs three records most businesses do not keep: new customers by month, where each came from, and what was spent to produce them. Mirastart builds those records into the systems that run the work, so the number is read off a screen instead of reconstructed once a year from memory.

The booking system records the source at first contact, which is the only moment a customer reliably knows the answer. The missed-call and follow-up systems capture the leads that would otherwise never enter any count, which is where a cost-per-customer figure usually goes wrong. The reporting screen puts new customers, spend and cost per customer on one page each month, in the unit the budget is set in. Ongoing engagements start at $3,000 a month, the fee is flat rather than a share of ad spend, and every account stays in your name.