HOW MUCH SHOULD I SPEND ON FACEBOOK ADS? START WITH WHAT META NEEDS
Picking a number out of the air is why most small budgets underperform. Here is how to work out a figure you can actually defend.
How much should I spend on Facebook ads is one of those questions where everyone gives you a different number and none of them explain how they got there. The honest answer is that the right budget is not a fixed amount, it is whatever it takes to buy enough results for Meta to learn from and for you to judge.
THE QUICK VERSION
Most small business Meta budgets fail for the same reason: they are set by what feels comfortable rather than by what the system needs to work. Too little, and the ads never get out of the learning phase.
The short version:
- Meta needs roughly 50 results per ad set per week to optimise properly. That is the real floor, not a pound figure.
- Work out what one enquiry is worth to you before you decide what you are willing to pay for one.
- Multiply your target cost per enquiry by 50 to see what a week of one ad set genuinely costs.
- UK agencies commonly quote somewhere in the region of £400 to £1,500 a month for a small business starting out, but treat that as a sanity check rather than an answer.
- Run one ad set properly rather than five ad sets badly. Splitting a small budget is the most common way to waste it.
- Give it at least two to four weeks before judging anything, and do not change the budget daily.
- Anything under about £10 a day rarely produces enough data to optimise on.
The point of all this is not to talk you into spending more. It is to stop you spending three months of small budgets learning nothing, which costs far more than a properly sized test.
NOT SURE WHERE TO START?
If you have been running ads for a while and cannot tell whether the budget is the problem or the ads are, the answer is usually sitting in your results data already. Most accounts we look at are spending enough, just spread across too many ad sets to ever learn anything.
OUR FULL GUIDE TO HOW MUCH YOU SHOULD SPEND ON FACEBOOK ADS
When someone asks how much should I spend on Facebook ads, they usually want a number they can put in a box today. You will get one by the end of this, but it will be your number rather than a borrowed one, which is the only kind worth using.
1. THE NUMBER META ACTUALLY NEEDS FROM YOU
Meta’s delivery system optimises by learning from results. Its own guidance is that an ad set needs in the region of 50 optimisation events a week to get out of the learning phase and deliver consistently.
That single fact decides more about your budget than anything else. If a result costs you £15 and Meta wants 50 a week, an ad set needs around £750 a week to run the way the system expects. If your result is a £3 landing page view rather than a £15 enquiry, the maths changes completely.
So the first question is not how much can I afford. It is:
- What am I optimising for, and what does one of those cost me right now?
- How many of those can this budget buy in a week?
- Is that number anywhere near 50?
2. WORK BACKWARDS FROM A LEAD, NOT FORWARDS FROM A BUDGET
Start with what an enquiry is worth. If your average customer is worth £900 and one in four enquiries becomes a customer, an enquiry is worth £225 to you, and paying £40 for one is a good trade rather than an expensive one.
Now you have a ceiling that means something. Multiply your acceptable cost per enquiry by the number of enquiries you actually want each month, and you have a budget with a reason attached to it.
Doing it the other way round, picking £300 because it sounds sensible and hoping enquiries appear, is how people end up concluding that Facebook ads do not work for their industry.
3. WHAT UK SMALL BUSINESSES TYPICALLY SPEND
For context rather than instruction: UK agencies commonly quote starting budgets somewhere between £400 and £1,500 a month for a small business, with daily budgets of roughly £10 to £20 per ad set as a practical starting point.
Published UK benchmarks tend to put clicks somewhere around £0.40 to £1.50 and cost per lead in a broad £8 to £30 range, though that varies enormously by industry and offer. Use those as a rough sanity check on your own numbers, not as a target. Your figures are the ones that matter, and you will have them within a month of running properly.
4. WHY SPLITTING A SMALL BUDGET MAKES IT WORSE
This is the mistake that quietly ruins more small accounts than any other. Someone with £400 a month sets up five ad sets to test five audiences, which leaves each one on under £3 a day.
None of them get near the results per week Meta needs, so none of them ever exit the learning phase, so all five deliver badly and the data tells you nothing about which audience was actually best.
One ad set with the whole budget will teach you more in a fortnight than five starved ones will in three months. Test sequentially rather than simultaneously when the budget is small.
5. WHEN TO INCREASE IT, AND BY HOW MUCH
Increase when the cost per enquiry is comfortably inside what an enquiry is worth to you and has held there for a couple of weeks. That is the only signal that matters, and it is worth waiting for.
When you do increase, go up in steps of roughly 20 to 30 percent rather than doubling. Large sudden changes push the ad set back into learning, which is precisely the thing you spent the last month getting out of.
COMMON MISTAKES
If you are still asking how much should I spend on Facebook ads after a few months of trying, one of these is usually the reason the answer never became obvious.
- Setting the budget by what feels affordable rather than by what a lead is worth.
- Splitting a small budget across several ad sets, so none of them ever learn.
- Changing the budget every few days, which resets the learning phase each time.
- Optimising for cheap results like link clicks, then wondering why none of them enquire.
- Judging performance in the first week, before the ad set has delivered enough to optimise on.
- Comparing your cost per lead to a benchmark from a completely different industry.
- Counting the ad spend as the whole cost and forgetting management, creative and the time it takes you.
DIY lane vs done for you lane
DOING IT YOURSELF
Perfectly possible. Work out what an enquiry is worth, set one ad set with the full budget, optimise for the action you actually want rather than a cheap proxy, and leave it alone for a fortnight. Then read the numbers and adjust in steps rather than leaps.
GETTING US TO DO IT
We size the budget against what a lead is worth to your business, run it as one properly funded test rather than five starved ones, and tell you honestly if the number you have in mind is too small to prove anything. Sometimes the useful answer is to wait until it is not. Here is how our social media marketing works.
RELATED GUIDES
If you are working out how much should I spend on Facebook ads, these guides cover the things that decide whether the money does anything once it is spent.
HOW MUCH SHOULD I SPEND ON FACEBOOK ADS FAQS
Work it back from what an enquiry is worth to you rather than starting with a figure. As a sanity check, UK agencies commonly quote £400 to £1,500 a month for a small business starting out, with roughly £10 to £20 a day per ad set. Below about £10 a day you rarely gather enough data to optimise on.
Usually not for lead generation. Meta needs in the region of 50 results per ad set per week to optimise properly, and £5 a day almost never buys that when you are optimising for enquiries. It can work for very cheap actions like page views, but those are not the thing you want.
Most often because the budget is split across several ad sets, so each one sits below the volume Meta needs and never exits the learning phase. Consolidating into one properly funded ad set usually helps more than any change to the creative.
Two to four weeks of steady spend without changing things. If you have adjusted the budget or the targeting every few days, you have restarted the learning phase repeatedly and the data will not tell you much.
They do different jobs. Google Ads catches people already searching for what you sell, Meta puts you in front of people who were not looking. If you only have one budget and demand already exists for your service, search usually proves itself faster.
The right Facebook ads budget is the one you can explain. Work it back from what a lead is worth, fund one test properly, and give it long enough to tell you something.
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