How much should a small business spend on ads, and how to decide

Start with what a customer is worth to you

Your ad budget shouldn't be based on what other businesses spend, but on what you earn from a sale. Before launching any campaign, write down three things: your average order value, your profit margin on that order and, if customers come back, how much a customer buys over time.

Those numbers give you the most you can pay to win a sale without losing money. Ad platforms call this a target cost per acquisition (CPA). If a product leaves a thin margin, your budget and acceptable cost per conversion must reflect that. If a new customer tends to buy again, you can afford to pay more for the first order.

Write down your maximum acceptable cost per sale. It's the yardstick you'll use to judge every campaign, on every network.

Pick the goal before the amount

The same budget can be used in very different ways depending on what you want. An online shop tracks orders, a service business tracks calls or form submissions, and a new brand may first just want to be seen in its area.

• Sales or leads: the budget ties directly to cost per conversion and is measured in orders or enquiries.
• Website traffic: useful when you have good pages and want to learn what interests visitors, but it is no substitute for measuring sales.
• Awareness: impressions to people in an area or with certain interests; the effect on immediate sales is harder to see.

For a small business, the general advice is to start with a measurable goal close to revenue: orders, calls or forms. That way, after a few weeks, you know whether the ads are paying for themselves.

Work out a test budget

The first weeks are a learning period, for you and for the platforms' algorithms. You need enough data to draw a conclusion: a meaningful number of clicks and, ideally, a few conversions. With too small a budget, a campaign collects data very slowly and you may switch it off before learning anything.

A simple way to think about a test budget:

1. Check the official tools for a rough cost per click for your keywords or audience. Google Ads Keyword Planner, for example, shows estimated cost-per-click ranges for your location.
2. Estimate, realistically, how many visitors out of a hundred might become customers on your site. With no history, be conservative.
3. Multiply: the clicks you need for a few conversions times the estimated cost per click. That's the minimum budget for the test period.
4. Divide by the number of days to get your starting daily budget.

Don't rely on average figures found online. You'll only learn your real costs from your own account, after the first days of running.

How to split the budget between networks

On a limited budget, it's better to start with one network and one or two campaigns than to spread money everywhere. A campaign with too little budget can't collect enough data to optimise.

When to start with search (Google Ads)

Search works when people are already looking for what you sell: “plumber near me”, “scented candle gift”. You pay for stated intent, and results are usually easier to tie to sales.

When to start with social (Meta, TikTok)

Social networks work when your product sells visually, is new, or isn't actively searched for. Here you create demand by showing the product to people who didn't know they needed it. You'll need good images or videos.

We cover the differences in detail in Google Ads vs Meta Ads. Once one network brings customers at an acceptable cost, that's the time to add a second.

Simple rules for scaling up and switching off

A budget isn't set once and forgotten. Review results weekly and decide by rules agreed in advance, not by gut feeling:

• Scale gradually campaigns that bring conversions below your maximum acceptable cost. Big, sudden increases can restart the algorithm's learning period.
• Fix before you cut campaigns that bring clicks but no sales: check the landing page, keywords and search terms.
• Switch off whatever keeps spending with no results after a reasonable test period.
• Move money from weak campaigns to strong ones instead of raising the total budget.

A lot of waste comes from irrelevant searches. Our guide to negative keywords shows how to find and block them.

Set a ceiling you never exceed

Ad platforms let you set a daily or lifetime budget per campaign, but it's easy to lose track with several campaigns across several accounts. Decide a monthly maximum for all your ads and check regularly that your daily budgets don't add up to more.

Bear in mind that platforms may spend more than the daily budget on some days and less on others. The exact rules differ by network, so check the official documentation: the Google Ads Help Center and the Meta Business Help Center.

How adscontrol.ai helps you keep the budget in check

In adscontrol.ai you connect your ad accounts (Google Ads, Meta, TikTok, LinkedIn, X or Pinterest) and ask the assistant in a chat for things like “where am I wasting money?” or “move budget to the campaign that sells”. You set a daily budget limit, and the assistant can't propose or set a budget above it.

Every budget change first appears as a card you confirm or edit, and new campaigns are created paused. Ad spend is paid directly to the networks, separately from your plan. Plans and what each includes are on the pricing page, and if you'd like to try it on your own accounts you can start the free trial.

Frequently asked questions