Paid social budgets for UK small businesses

Short answer

Start at £300-£500 a month, targeted tightly to the area you actually serve, promoting content that already performed organically. Run one campaign, not five. Judge it on cost per enquiry after 60 days, and only increase spend once that number is stable and acceptable.

• £300-£500 a month is the floor for interpretable results for a local business.
• One campaign, one objective, one audience. Fragmented budgets produce no learning.
• Promote proven organic content. It is the cheapest possible creative test.
• Target your real service radius, not the widest area you would accept work from.
• Scale only when cost per enquiry is stable for 60 days.

Why do small paid budgets often fail?

Because they are split across too many campaigns. A £400 monthly budget divided between five audiences gives each one about £2.60 a day, which is not enough for any of them to leave the learning phase or produce a sample size you can read.

The fix is concentration. One campaign with the whole budget produces a result you can interpret, and interpretation is the entire point of a first paid budget.

How should a £500 monthly budget be structured?

For a local UK service business, a simple structure that works.

• £350 on one always-on campaign to your service radius, optimised for conversations or leads.
• £100 on promoting the single best organic post of the month.
• £50 held back for retargeting people who visited your site or engaged with your content.
• One creative refresh a month, not weekly changes that reset learning.

• Facebook ads versus boosted posts

What should you optimise for?

Conversations or leads, not reach, clicks or engagement. Platforms deliver what you ask for, and asking for clicks reliably produces clicks from people who do not enquire.

For most small UK businesses, optimising for messaging conversations works better than optimising for website conversions, because the enquiry volume is too low for the platform to learn from website events. Once you exceed roughly 50 conversions a month, website optimisation becomes viable.

What is a reasonable cost per enquiry?

It depends entirely on what an enquiry is worth to you, which is the calculation most small businesses skip.

Work backwards: average job value, multiplied by your quote-to-win rate, gives the value of an enquiry. If jobs average £2,400 and you win one in four quotes, an enquiry is worth around £600 in revenue, and paying £60 for one is straightforward. If jobs average £120, the arithmetic is very different and paid social may not be the right channel at all.

• How to measure social media ROI

When should you scale?

When cost per enquiry has been stable for 60 days, when you can service the additional volume, and when the destination converts. All three, not one.

Scale by increasing budget on the working campaign by around 20% a week rather than doubling it, because large sudden increases push campaigns back into a learning phase and performance typically degrades before it recovers.

What about creative?

Use what worked organically. A post that earned engagement without payment has been validated by real people, which is a better signal than anything you can produce speculatively.

Keep the format native. Content that looks like an advert performs worse than content that looks like a post, particularly in video, and this is more pronounced on the newer platforms than on Facebook.

• Short-form video for small businesses without a studio

What should you check before spending anything?

Four things, in order, because paid social amplifies whatever already exists and will amplify problems just as efficiently as strengths.

First, the destination converts: it states what you do, who for, an indication of cost and one obvious action, above the fold on a phone. Second, tracking is installed and firing. Third, somebody can respond to the enquiries within four working hours. Fourth, you can service the additional work.

If any of the four is missing, fix it before spending. Money spent driving traffic to a weak destination or an unmanned inbox is not a test of paid social; it is a test of your ability to waste a budget quickly, and it usually produces a wrong conclusion about the channel.

• Destination page answers the buying questions on a phone.
• Pixel or conversions API installed and verified.
• Response capacity inside four working hours.
• Capacity to service the extra work you win.

Next step

Paid social is the fastest way to find out whether your offer and your destination work. It is also the fastest way to spend money finding out that they do not, which is why the sequence matters.