Guerrilla marketing is the art of getting noticed without a big budget. Instead of buying attention with advertising, you earn it with an idea: something surprising, useful or clever, in a place people don’t expect it.

The term comes from guerrilla warfare: small teams, fast movement, unexpected places. The classic examples are consumer brands. A giant shoebox shop. Chalk art on the pavement. A stunt that people photograph and share.

So you’d be forgiven for thinking it has nothing to do with accountants, solicitors or financial advisers. Mostly, you’d be right. But not entirely.

Why it’s back in 2026

Two reasons. First, people are tired of ads. Feeds are full and attention is expensive, so anything that feels real and unexpected stands out more than it used to.

Second, a good idea now travels further. A stunt that once reached the few hundred people walking past can reach thousands more online within a day, if it’s worth sharing.

The famous successes are genuinely impressive. Burger King’s “Whopper Detour” offered a one-cent burger to anyone who opened its app near a McDonald’s. Adweek reported a 37:1 return. Blendtec’s “Will It Blend?” videos started on a production budget of around $50.

The famous failures are just as instructive. Attention isn’t the same as trust, and a stunt that misjudges its audience can cost far more than it ever earned.

Should a professional services firm even try?

Honestly? Not the stunts. Clients choose an accountant or a solicitor because they seem careful, competent and safe. A flash mob outside the office doesn’t say any of those things.

But the principle behind guerrilla marketing is useful: get noticed through an idea rather than a budget. For a professional firm, the trick is to make the surprise come from being unexpectedly helpful, not unexpectedly loud.

Six ideas that suit a professional firm

1. The deadline desk

In the fortnight before the 31 January self-assessment deadline, an accountancy firm sets up a free “ten-minute questions” desk in a local co-working space, library or business hub. It’s useful, it’s timely, and it’s exactly the kind of thing local press and LinkedIn like to share.

2. The data drop

Publish something nobody else has: a short piece of original research. “We reviewed 100 local landlords’ tax questions.” “What 200 small firms told us about cash flow.” Original numbers get quoted, linked to and picked up by AI tools. It’s the most reliable form of B2B guerrilla marketing there is.

3. The same-day comment

When a budget, rate change or new regulation lands, be the first sensible voice on it — on LinkedIn, in a short article, in an email to the trade press. Speed and clarity get you noticed. It costs nothing but attention.

4. The unexpected venue

A “wills and probate questions” evening in a local café. A pension clinic at a sports club. Take the advice to where people already are, rather than waiting for them to find your office. (Check your regulator’s rules on promotion first.)

5. The myth-buster

Pick the most common misconception in your field and take it apart, clearly and with a bit of personality. “No, you don’t need a solicitor to … but here’s when you really do.” Candour is surprising in a profession known for caution.

6. The small, personal touch

Twenty handwritten letters to the twenty businesses you’d most like to work with, each with one genuinely useful observation about their situation. Not scalable. That’s exactly why it works.

Where most guerrilla campaigns fall down

Here’s the part the case studies leave out. A clever idea creates a moment of interest. What happens next decides whether it was worth it.

• People search for you. If your website is slow, vague or hard to use on a phone, the moment is gone.
• There’s no clear next step. Interested people need an obvious, low-effort way to get in touch.
• Nobody hears about it. A stunt seen by forty people is a nice afternoon. A stunt covered by the local paper and shared on LinkedIn is a campaign.
• Nobody measures it. Ask every new enquiry how they heard of you. Otherwise you’ll never know what worked.

In other words, guerrilla marketing doesn’t replace the fundamentals. It depends on them.

The short version

Guerrilla marketing is about earning attention with an idea instead of a budget. Most of the famous stunts would be wrong for a professional firm. The principle isn’t. Be useful in unexpected places, say something worth repeating, and make sure that when people come looking, your website is ready for them.

That last part is where we come in. Fresh Brands builds websites that turn interest into enquiries, and our sister agency Get Results PR makes sure the right people hear about the idea in the first place.

• Burger King “Whopper Detour” results as reported by Adweek (2019), summarised in Minneapolis Made, “Does Guerrilla Marketing Still Work?”, 2026.
• Blendtec “Will It Blend?” budget, per UNSW BusinessThink, summarised in the same article.