How Much Should You Spend on Facebook Ads? (A Framework, Not a Number)

Search “how much should I spend on Facebook ads” and you’ll get a hundred confident numbers. Ignore all of them. The right budget isn’t a number someone hands you — it’s something you calculate from your own economics.

Here’s the framework I actually use.

Start from the learning phase, not your wallet

Every Meta ad set has to get through the learning phase — roughly the first 50 conversions, during which the algorithm figures out who converts. Under-fund it and it never stabilises, so your results stay random.

So the first question isn’t “what can I afford?” It’s “what does one ad set need to learn?”

The simple math

1. Find your cost per result (a lead, a purchase, a booking). New account? Estimate it, you’ll correct it fast.
2. Meta needs about 50 results per ad set per week to exit learning.
3. Multiply: 50 × cost per result = weekly budget per ad set.

Examples:

• Lead costs ~€10 → €500/week → **€70/day** per ad set.
• Purchase costs ~€30 → €1,500/week → **€215/day** per ad set.

If that number is out of reach, don’t just spend less and hope. Optimise for a cheaper event higher up the funnel (landing-page views, add-to-cart) so you still hit ~50 events and gather signal, then move down the funnel as budget grows.

Set it and leave it (for a week)

The fastest way to sabotage a campaign is to nudge the budget every morning. Every meaningful change can reset the learning phase.

Pick a daily budget you can sustain for at least seven days, then leave it alone. Judge performance after learning, not on day one — a bad first 24 hours means almost nothing.

How to know it’s working

Watch cost per result after the learning phase, against your break-even. If a sale is worth €30 to you and Meta is delivering sales at €18, you have room to scale. If it’s €40, you don’t — fix the offer or creative before you spend more.

How to scale without breaking it

Once a campaign is profitable and stable:

• Increase the budget 20–30% every few days, not overnight — big jumps reset learning.
• Scale winners, cut losers. Don’t spread budget evenly across everything “to be fair.”
• Keep watching cost per result as you climb. The moment it crosses break-even, ease off.

The honest answer

So — how much should you spend on Facebook ads? Enough for one ad set to learn, no more than your economics allow, and never a number you can’t sustain for a week. Start there, measure, and let the results tell you when to push.

Want this mapped to your exact numbers? That’s the first thing I work out with coaches, salons and hotels — because “how much” always depends on what a customer is worth to you.

Common questions

How much should I spend on Facebook ads to start?

Enough for your ad set to collect roughly 50 conversions a week so it can exit the learning phase. Work backwards from your cost per result: if a lead costs about €10, that's roughly €500/week (~€70/day) per ad set. If you truly can't reach that, optimise for a cheaper event higher up the funnel, like a landing-page view, while you gather data.

What's a good daily budget for Facebook ads?

A useful floor is 5–10× your target cost per result per ad set, per day, so the algorithm gets several conversions daily. Below that, delivery stays volatile. Start there, keep it steady for at least a week, and judge results after the learning phase — not on day one.

Why shouldn't I change my Facebook ad budget every day?

Every significant budget change can reset the learning phase, throwing delivery back into its most volatile state. Set a budget you can sustain for a week, leave it alone, and only scale once results are stable — ideally by 20–30% at a time.

How do I scale my Facebook ad spend?

Once a campaign is profitable and out of learning, increase the budget gradually — around 20–30% every few days — so you don't reset learning. Scale the winners, cut the losers, and watch cost per result as you go: if it climbs past your break-even, ease off.