Facebook ads budget UK: what small businesses should spend

A small UK business should spend on Facebook and Instagram ads what it can afford to pay per lead or sale, multiplied by the number of results it needs, plus Meta’s 2% UK location fee. Meta’s learning phase is built around roughly 50 results a week, so the full weekly budget is 50 times your cost per result; if that’s more than you can afford or handle, start with a smaller test of a few weeks instead.

How do Facebook and Instagram ad budgets work

You set a daily or lifetime budget on each campaign or ad set, and Meta spends it across Facebook, Instagram, Messenger and Meta Audience Network, the technologies its pricing page covers.

A daily budget is, in Meta’s words, “a daily spending target over the course of a calendar week”. On a good day Meta may spend up to 75% more (175% of the daily budget), on a quiet day less, and over a Sunday to Saturday week no more than seven times the daily budget.

With a £30 daily budget, Meta can spend up to £52.50 on a Tuesday but no more than £210 in the week. Turning on ad set budget sharing lets Meta move up to 20% of an ad set’s budget to your other ad sets, and Meta’s own example shows the caps rising to 210% a day and 8.4 times a week, so £63 and £252.

A lifetime budget is the total you’re willing to spend over the whole run of a campaign or ad set. Meta says it suits people who don’t want to exceed an overall amount and don’t mind the daily spend moving around. A three-week opening offer for a new café is a natural fit.

Two other controls stop overspending. Meta’s pricing page lists a campaign spending limit, the most one campaign can spend, and an account spending limit, the most all your campaigns together can spend. Set the account limit first if anyone else has access to your ad account.

Meta does require a minimum budget, but it doesn’t publish one number. Its minimum budgets guide says the minimum depends on your business vertical, budget type, bid strategy, optimisation event, currency and schedule, and that Ads Manager shows an alert if you’re below it.

What is the Meta learning phase

The learning phase is the period after you create an ad set, or make a big change to one, when Meta is still working out who to show it to. Meta says an ad set usually leaves it after about 50 results in the week after its last significant edit, and that results are less stable and usually more expensive until then.

A result is whatever you told Meta to optimise for: a purchase, a lead form, a landing page view. Because an ad set usually needs about 50 results a week to leave learning, that number is the ceiling worth budgeting towards.

If an ad set is unlikely to get about 50 results in that week, Ads Manager marks it Learning limited. Meta says this “isn’t a penalty”. It means the system can’t optimise as well with the current setup. Its suggested fixes are to combine ad sets, widen the audience, raise the budget, or optimise for an event that happens more often, for example add to cart instead of purchase.

Edits restart the clock. Meta’s list of significant edits includes any change to targeting, creative or optimisation event, adding a new ad, changing the bid strategy, and pausing for seven days or more. A budget change may or may not count depending on size: Meta’s example says going from $100 to $101 is unlikely to restart learning, while $100 to $1,000 may.

Pick a budget you can hold steady, then leave the ad set alone for at least a week.

What is Meta’s 2% UK location fee

Since 1 July 2026, Meta has added a 2% location fee to ads shown to people in the UK. Reuters reported the change in March 2026 as a way to pass on digital services taxes.

Meta’s help page sets out how it works:

• The fee depends on where the audience is. Where your business is registered makes no difference.
• It applies to ads in any format, image or video, and to WhatsApp click-to-message campaigns.
• It is not taken from your budget or spending limit. Meta adds it after the ads are delivered, as a separate line on your invoice, so your bill can be higher than your budget.
• Where VAT applies, it is calculated on the ad cost plus the fee.
• The other rates are 3% for France, Italy and Spain, and 5% for Austria and Türkiye.

For most UK businesses, a month with £600 of ads delivered in the UK costs £612. An online shop that also targets France pays 3% on whatever is delivered there. A local plumber can’t avoid the fee, since all their customers are in the UK. Meta breaks the fees down by country on your invoice, so you can see what each market cost.

How do I work out my Facebook ads budget

Start from the most you can pay to win a customer, turn that into a cost per lead, and multiply by the number of leads you want.

1. Work out gross profit from one new customer over the first year. Use profit. A £1,200 job with £700 of materials and labour is worth £500.
2. Decide how much of that you’ll spend to win the customer. Paying all of it means you break even; we’d suggest starting at a quarter to a half.
3. Divide by how many enquiries turn into customers. If one in four does, your maximum cost per lead is a quarter of the amount from step 2.
4. Multiply that cost per lead by 50 for the weekly budget that should get you out of the learning phase. If it’s too much, choose the number of leads you can afford, or handle, each week and accept Learning limited for now.
5. Divide the weekly figure by seven for a daily budget, and add 2% to the monthly total for the location fee.

If you use the cost per result goal bid strategy, where you give Meta a target cost per result, Meta’s minimum budgets guide adds one more rule: your daily budget should be at least five times your goal. A £15 cost per lead goal needs at least £75 a day.

How much should different businesses spend on Meta ads

Each business should budget its maximum cost per lead multiplied by the number of leads it can handle each week, so the figures differ widely. The numbers below are assumptions we chose to show the method. Replace them with your own.

Business	Profit per new customer	Max you’ll pay per customer	Enquiries that become customers	Max cost per lead	Leads it can handle a week	Weekly budget
Plumber in Leeds (boiler installs)	£500	£200	1 in 4	£50	5	£250
Private dentist in Leicester	£600 in year one	£200	1 in 3	£67	8	£536
Family solicitor in Bristol	£900	£300	1 in 6	£50	6	£300
Estate agent in Reading (valuations)	£2,400 per sale	£600	1 in 8	£75	10	£750
Online candle shop	£20 per order	£8	Every purchase	£8 per sale	50	£400

Fifty leads a week would cost the dentist £3,350, and the clinic couldn’t see that many people anyway. For the service businesses, run the budget long enough to see whether leads really cost that. Each will show Learning limited, which is expected at this size.

The candle shop is the one that wants volume, and it shows the trade-off Meta describes. Fifty sales a week at £8 each is £400 a week. If sales cost more than £8 and the budget can’t stretch to 50 a week, optimising for add to cart, which happens more often, gives the system more results to learn from on a smaller budget, at the cost of optimising for a step before the sale.

A café is the hardest case, because few customers fill in a form before buying a flat white. A lifetime budget for a set period, with an offer people show at the till, is the cleanest way to see whether the ads brought anyone in.

What does a £20 a day Facebook ads budget cost in a month

A £20 daily budget costs about £620 a month including the 2% location fee, before any VAT. Here is how that works for a plumber in Leeds who wants boiler installation enquiries. From the table, the most they’ll pay is £50 a lead, but they’d rather pay £25, and they can quote for about five jobs a week.

• Weekly budget: 5 leads × £25 = £125. They round up to a daily budget of £20.
• Meta’s caps: up to £35 on any single day, no more than £140 in a Sunday to Saturday week.
• A month is about 30.4 days, so at £20 a day the ad spend is about £608.
• Location fee: 2% of £608 is £12.16. Total about £620 before any VAT.

If leads come in at £25, that’s around 24 enquiries in the month. The ad set will show Learning limited, because five or six leads a week is well short of 50. The plumber leaves the ads unchanged for the first week, then counts how many leads turn into booked jobs. If six of the 24 book, each customer cost about £103 against £500 of profit, and the budget can go up in small steps, which Meta says is unlikely to restart learning.

If leads cost £60 instead, the test has still done its job for about £620. The plumber knows Meta costs more per lead than they can pay with this offer, and can change the offer or the advert before spending more.

What to do next

Work through the five steps with your own numbers before you open Ads Manager. Set an account spending limit, pick a daily budget you can hold for a month, and budget an extra 2% for the location fee.

Our Meta ads service looks after your campaigns weekly, within a budget we agree, and sends a weekly report.

If you’d like a second opinion first, Padon’s free check compares your business with its competition nearby and emails you a short report within two working days.