Setting a Digital Marketing Budget for Your Belfast SME

The Question Nobody Answers Straight

"How much should we be spending?" is the question we get asked most often by Belfast business owners, and it usually gets answered with a percentage plucked from an American survey of companies nothing like theirs.

The honest answer is that it depends on what you sell, what a customer is worth to you, how competitive your market is, and whether you are trying to grow or hold steady. But "it depends" is useless on its own, so this article gives you a method for arriving at a number, realistic figures for what things cost in this market, and a way to check whether the spend is working.

Start From What a Customer Is Worth

Everything else is guesswork until you know this. Two numbers:

Average customer value. What does a customer produce in revenue over the time they stay with you? A café customer might be worth a few hundred pounds a year. An accountancy client might be worth several thousand over five years. A single bathroom installation might be five thousand once.

Acceptable cost per acquisition. What can you pay to win one and still be comfortably profitable, after delivery costs?

If a customer is worth £2,000 in gross profit over their lifetime and you would happily pay £200 to acquire one, you have a workable ratio. Now the budget question becomes arithmetic: how many customers do you want, times what you can pay for each.

Most small businesses have never calculated this, which is why marketing spend feels like a leap of faith. It takes an afternoon with your accounts and it changes every subsequent decision.

Percentage Rules, With the Caveats

The common heuristics are 5–10% of revenue for an established business holding position, and 10–20% for one pushing for growth. Treat these as sanity checks rather than instructions.

They break down badly at small scale. Five percent of £120,000 turnover is £6,000 a year — £500 a month. That will not buy meaningful SEO, a decent ad budget and a website refresh simultaneously. At the smaller end you are not allocating a portfolio, you are choosing one or two things to do properly.

They also ignore margin entirely. Ten percent of revenue means something very different to a service business at 60% margin than to a retailer at 15%. If you use a percentage, use it against gross profit, not turnover.

What Things Actually Cost in This Market

Rough, honest bands for Northern Ireland. Anything wildly below these is usually someone offshoring it or automating it badly.

The website

Your website is the destination for everything else, which is why spending on traffic before the site is fit for purpose is the most common way businesses waste money.

• Brochure and marketing sites: from £1,000 – £3,000
• E-commerce stores: from £3,000 – £10,000+
• Bespoke and custom builds: from £5,000+

Our pricing page sets out what sits behind those bands, and our guide to web design costs explains what actually drives the difference.

Treat this as a capital cost amortised over three to five years, not an annual expense. A £4,000 website that lasts four years is under £85 a month — which reframes it usefully when you are comparing it against ad spend.

Running costs

Small, unavoidable, and worth knowing so they do not surprise you:

• Hosting: £15–£100 a month depending on platform and traffic
• Domain: around £15 a year
• Care plan with updates, backups and monitoring: from £50 a month
• Third-party subscriptions — email platform, booking system, e-commerce plan — vary widely

Skipping the maintenance line is a false economy. An unpatched site that gets compromised costs far more to recover than the plan would have cost to run. Our piece on ongoing maintenance makes the case.

SEO

Ongoing work — technical fixes, content, local signals, links. Realistically a few hundred pounds a month at the small end, more for competitive markets.

The critical thing to understand is the time horizon. SEO does not produce results in month one. Three to six months before meaningful movement is normal, longer in competitive categories. If your cash position cannot tolerate six months of spend before return, SEO is not the right first investment — ads are.

Where it pays off is durability. Rankings earned keep producing after the spend stops, in a way that advertising never does.

Paid advertising

Google Ads for local service searches, Meta for awareness and retargeting. Budget splits into media spend — what goes to the platform — and management, whether that is your time or an agency's.

Below roughly £300 a month in media spend, Google Ads for a competitive Belfast term will struggle to gather enough data to optimise. You will spend the money and learn very little.

The advantage is speed. Ads produce results the day they switch on, which makes them the right tool when you need enquiries now, when testing whether a market exists, or when covering the gap while SEO matures.

Content

Whether that is blog articles, photography, video or case studies. Either your time or someone else's. Content is what feeds SEO, social and email simultaneously, which makes it the most reusable pound in the budget and the one most often cut first.

How to Split It

Depends far more on your situation than on any standard formula.

If your website is not good enough yet

Put most of the budget there and very little into traffic. Sending paid clicks to a site that does not convert is buying an audience for a shop with the shutters down. Fix the destination first.

Signs the site is the constraint: it is slow, it is not properly usable on a phone, it looks dated against competitors, enquiries are rare relative to visits, or you are embarrassed to send people to it. Our article on when to redesign covers the tells.

If you need enquiries this quarter

Weight toward paid — perhaps 60% ads, 30% SEO and local, 10% content. Accept that this is renting demand, not building an asset, and that it stops the day you stop paying.

If you are building for the next two years

Reverse it. Weight toward SEO, content and local presence, with a smaller ad budget covering the near term while the organic work matures. This produces a lower cost per enquiry over time but requires patience and a cash position that can absorb the lag.

If you are a local service business

Your highest-return work is usually unglamorous and cheap: a fully completed Google Business Profile, a consistent review habit, accurate citations, and location pages that are genuinely about the places you serve. This is a large share of local visibility for a small share of the budget. Start here before anything else, whatever your split.

The Free Work That Comes First

Before allocating anything, do the things that cost only time. Skipping these and buying traffic instead is the most common budgeting mistake we see.

• Claim and complete your Google Business Profile
• Fix your name, address and phone consistency across the web
• Ask your existing happy customers for reviews
• Make your phone number tappable and prominent on mobile
• Ensure your opening hours are correct everywhere
• Add clear calls to action to your main pages

None of this requires a budget. All of it affects results. Our Belfast local SEO guide covers the full list.

Measuring Whether It Works

A budget you cannot evaluate is an expense, not an investment.

Track enquiries by source. Form submissions, phone calls, emails, walk-ins — and where each came from. Call tracking numbers, form source fields, or simply asking every new enquiry how they found you. Crude methods beat no methods.

Calculate cost per enquiry and cost per customer. Total spend divided by enquiries, then by the proportion that convert. Compare against the acceptable acquisition cost you worked out at the start.

Judge channels on their own timescale. Ads can be assessed in weeks. SEO cannot be assessed in weeks, and killing it at month three because it has not produced guarantees you paid for the setup and none of the return.

Watch the leading indicators too. Search Console impressions, Google Business Profile calls and direction requests, branded search volume. These move before revenue does and tell you whether something is building.

Review quarterly, not monthly. Monthly reviews of a channel with a six-month lag produce panic and thrash. Set the budget, run it long enough to mean something, then assess properly.

Where Budgets Get Wasted

Buying traffic to a site that does not convert. The most expensive mistake available, and the most common.

Spreading too thin. £400 a month split across SEO, Google Ads, Meta Ads, content and email does nothing anywhere. One channel funded properly beats five funded token.

Paying for reports instead of work. If a large share of the retainer produces documents rather than changes, you are buying paperwork.

Rebuilding the website every two years. Usually a symptom of building on the wrong foundation, or of never fixing the actual problem — which is often content and conversion, not design.

Abandoning channels early. Stopping SEO at month four means you paid for the foundations and left before the return.

No measurement at all. Without it you cannot tell a good channel from a bad one, so you cut based on feeling and usually cut the wrong thing.

Three Illustrative Shapes

Not prescriptions, but they show how the reasoning plays out.

A new trades business, tight budget. Free local SEO work first. A modest brochure site. £300–£400 a month into Google Ads for the searches with obvious intent. Reviews requested from every job. Reassess in six months.

An established retailer with an ageing site. Most of year one into rebuilding the site properly, with a small ad budget maintaining current demand. Once launched, shift toward content and SEO, with the site now able to convert what arrives.

A professional services firm playing a long game. Weighted toward content, SEO and local authority. Ads used narrowly on high-intent terms only. Success measured in enquiry quality as much as volume, given what one client is worth.

Getting the Number Right for You

The most useful thing you can do before spending anything is find out honestly where you currently stand — whether the website is the constraint, where you sit against Belfast competitors, and which of the free work is still undone.

That is what our free website audit is for. If you would rather talk it through, get in touch — we are happy to be straight with you about whether you need a new website, better SEO, a digital marketing push, or simply to fix a few things you already have.