Somewhere between five and twenty percent of revenue. That is the honest range for small business marketing spend, and it is wide on purpose. Nobody can hand you one number without knowing your stage and your industry, and anyone who does is guessing.
Stage narrows it fastest. Early or pre revenue, you are looking at ten to twenty percent of projected revenue, because you are paying for awareness and testing channels before there is much revenue to measure against. Growing but still building a repeatable acquisition engine, seven to ten percent is normal. Get to stable or mature and you can often drop to four to seven percent, because brand strength and word of mouth start doing quietly what paid spend used to carry alone.
Industry moves the number even more than stage does. A consumer packaged goods company or a professional services firm might sit near twenty to twenty five percent, fighting for attention in a loud category. A manufacturing or transportation business sells into relationships and contracts, not impulse, so one to four percent is often plenty. That is not underinvestment. It is just a different kind of business, and copying a percentage from the wrong one either starves a growing brand or burns cash where marketing spend was never the lever that mattered.
Here is the part most guides skip. Plenty of small businesses do not budget by percentage at all. They set a dollar ceiling against whatever cash flow allows that month, often a few thousand dollars, and work backward from there. That is not laziness, whatever the spreadsheet templates imply. Percentage based budgeting assumes a revenue base healthy enough to spare the percentage, and a thin margin or a slow month does not care what the industry average says you should be spending.
A better starting point than either number: work backward from your funnel. Say you need thirty new customers this quarter. One lead in twenty converts, so you need six hundred leads. A lead costs forty dollars to generate, so the quarter's marketing budget is twenty four thousand dollars, whatever percentage of revenue that happens to land on. When the funnel math and the industry benchmark disagree, believe the funnel math. The benchmark just tells you whether your number is wildly out of line. It was never meant to be the number itself.
Choosing a percentage is not actually the hard problem. Trusting what the money buys once you have committed it is. If your instinct says you would rather fix the budget and watch it turn into work you do not believe in, that is the moment to bring in a studio, not another spreadsheet.