How much should a small business spend on ads?

Every small business owner asks it eventually: how much should I actually spend on ads? Spend too little and you never gather enough data to learn anything. Spend too much too soon and you're gambling before you understand what works. Here's a method that avoids both traps.

Start with what you can afford to lose

Your first ad budget isn't an investment expecting instant return — it's tuition. You're paying to learn which audience, message and offer works. So the first question is: what can I spend for 6-8 weeks, treat as a learning cost, and not panic if it doesn't immediately pay back? For many small businesses that's a few hundred euros a month. That's fine — it's enough to learn.

The common benchmark (and its limits)

A frequently cited rule is 5-10% of revenue on marketing, with a portion of that on paid ads. It's a reasonable sanity check, but it's backward-looking — it sizes spend to where you are, not where you're going. Use it as a ceiling, not a target.

Give a campaign enough to learn

The real minimum is set by the platform's need for data. A campaign spending €3 a day will take months to exit the "learning phase" and may never optimise. Better to run one focused campaign with enough daily budget to gather signal quickly than five starved ones that learn nothing.

The right budget is the smallest amount that still buys you a clear answer. Below that, you're not advertising — you're donating.

Then let results set the pace

Once a campaign is profitable, scaling is no longer a gamble — it's math. If every €1 reliably returns €3 at a margin you're happy with, spending more is simply buying more of a known-good outcome. The trigger to scale is a healthy, honest ROAS, watched against your true spend and return — not a hunch. Start small, learn deliberately, scale what proves itself.