What Facebook budget for a new shop? How to set it

“How much budget do I need on Facebook to get my shop off the ground?”

It’s a fair question. The trouble is that the answer you’re after — a fixed figure, something like “300 euros and you’re sorted” — doesn’t exist. The right budget for you isn’t the same as your neighbour’s, because it depends on what you sell, at what price and on what margin.

But that doesn’t mean you’re just guessing. There’s a clear logic for setting where you start from. Let’s get into it.

📌 What you’ll learn: Why there’s no universal budget, how to work out where you start from, what the algorithm’s learning phase is, and the mistakes that burn through a new shop’s money.

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❌ Why there’s no “magic number”

Someone selling a 50 lei product on a thin margin is playing a completely different game from someone selling an 800 lei product on a fat margin.

The budget depends on:

• The product price — the more expensive it is, the more expensive each sale is to bring in.
• Your margin — what’s left after costs decides how much you can afford to spend on a sale.
• How well known the product is — something people actively search for sells more easily than something you have to explain.

So any “universal” figure you see online is an average that, in your specific case, can be completely wrong.

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🧮 How to work out where you start from

Instead of a figure plucked from thin air, start with a question: how much can I afford to pay for a sale?

Step 1 — How much money is left from a sale (profit per order):

Product price:        200 lei
Product cost:         -90 lei
Shipping/packaging:   -20 lei
Profit per order:      90 lei

Step 2 — That’s the most you can afford to pay on ads for a sale and still break even. In practice you want to pay less than that, so you’re left with a profit. Let’s say your target is at most 45 lei per sale (half the profit).

Step 3 — The test budget. For the algorithm to learn and for you to gather meaningful data, you need a minimum volume of results. The rule of thumb: your daily budget should allow a few sales a day, not one every three days.

Cost-per-sale target:  45 lei
You want ~2-3 sales/day to gather data
Indicative daily budget: 90 – 135 lei/day

The figures above are an example calculation, not a promise. The point is the mechanism: the budget comes out of your product’s economics, not the other way round.

The budget isn’t how much you “can afford to burn”. It’s how much you need in order to find out, quickly enough, whether the product and the ad work.

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🤖 The learning phase: why you don’t judge on day one

When you launch a campaign, the Facebook algorithm doesn’t yet know who to show your ad to. It needs data — that is, results — to figure it out.

This is called the learning phase. During this period:

• Results swing about. One day goes well, another badly. That’s normal.
• The cost per sale is often higher at the start and settles down as the algorithm learns.
• If you stop and start the campaign every day, you reset the learning and it gets nowhere.

The takeaway: give the campaign enough time and volume to come out of the learning phase before you draw conclusions. Anyone judging a campaign after the first day is judging noise, not signal.

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⚠️ The classic mistakes of a new shop

1. Too small a budget and too little patience. You set a small budget, see one sale every two days, panic and switch it off. The algorithm never got the chance to learn anything. Better a realistic budget on a single product than crumbs spread across ten.

2. You change everything, every day. You change the ad, the audience, the budget — daily. Then you wonder why it isn’t working. Constant changes prevent any learning. Let things run before you step in.

3. Good ad, bad page. You pay to bring people to the site, but the page is slow, unclear or makes people uneasy — and they leave. The ad is only half of it. The other half is what people find when they arrive.

4. You only look at first-week ROAS. At the start, a lot of costs (learning, creative testing) inflate the figures. Judge over a period, not over one bad day or one lucky one.

5. You don’t know your profit threshold. If you haven’t worked out the cost per sale at which you come out ahead, you’ve no way of knowing whether a campaign is good or bad.

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🪜 The healthy approach for a new shop

1. One product, one clear offer. Don’t scatter the budget across the whole catalogue from the off.
2. A budget that allows a few results a day, worked out from the product’s economics.
3. A few ad variants, so you can see what lands — not just one.
4. Let it run, without fiddling with the settings daily.
5. Read the data over a period, against your profit threshold.
6. Fix the page, not just the ad, if people come but don’t buy.

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In short

There’s no universal Facebook budget for a new shop. The right budget comes out of your margin and out of what you can afford to pay for a sale, calibrated so you gather data quickly enough. Give the campaign time to come out of the learning phase and judge it on real figures, not on panic.

If you want to go deeper on the economics side: first understand what ROAS is and your profit threshold. And if the ads bring traffic but the orders don’t come, the problem is on the page — see why you have traffic but aren’t selling.

You’ll find details on how we run Meta campaigns on the Facebook Ads page.

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If you’d like us to work out a realistic starting budget for your product together — starting from your margin, not from a figure plucked from thin air — we can take a look at your specific case.

→ Let’s work out your starting budget