Email marketing for small businesses: a simple UK guide
For a small local business, email marketing means sending short, useful emails to people who've agreed to hear from you, mostly past customers, to remind them you're there and make booking again easy. You can start with the details you already have from bookings and enquiries, as long as you follow the UK rules on consent.
You don't need a big list, a designer or a weekly newsletter. A monthly email to a few hundred past customers is plenty.
Checked 18 Oct 2026
Who you're allowed to email
This is the part most guides skip, and it matters most. UK marketing emails are covered by PECR and UK GDPR.
The ICO says you must not send marketing emails or texts to individuals without their specific consent, with a limited exception for your own previous customers, the soft opt-in. That exception only applies if they bought (or asked about buying) a similar service from you, and you gave them a simple way to opt out when you took their details and in every message since. Every marketing email must also say who it's from and give a valid address to opt out (ICO).
In practice:
| Who | Can you send them marketing emails? |
|---|---|
| Past customers who were offered an opt-out when they booked, and every time since | Usually yes, under the soft opt-in, about similar services |
| People who ticked a box to hear from you | Yes |
| People who asked for a quote or price but didn't book | Under the soft opt-in, only if you offered an opt-out when they asked and in every message since; otherwise only with their consent |
| Sole traders and some partnerships | The same rules as individuals |
| Limited companies (to a work address) | Different rules: you can usually email them, but must say who you are and let them opt out |
| A bought list | No. Don't |
Sole traders and some partnerships count as individuals under these rules, so the consent or soft opt-in rules apply to them (ICO).
This is a summary, not legal advice.
Build your list from what you already have
Your bookings diary, your booking system, your invoices and your enquiry form already contain most of your list.
- Export the contacts from your booking system or accounts software.
- Remove anyone who has asked not to hear from you.
- Check how each group gave you their details, using the table above.
- From now on, offer a clear opt-out (or an opt-in tick box) when people book.
What to send
Keep each email short and about one thing. Ideas that work for local businesses:
- Availability. "We've got slots next week" or "Christmas bookings are open".
- Seasonal reminders. Boiler service before winter, a spring tidy for the garden, flea treatment season for dog owners.
- Something new. A new service, a new member of staff, new opening hours.
- A useful tip. How to keep a fringe tidy between cuts, what to check before calling a plumber.
Every email should end with one clear thing to do: usually your booking link.
How often
Once a month is a good starting point. Often enough to be remembered, not so often people unsubscribe. If you don't have anything useful to say, skip a month.
Which tool to use
You need an email tool rather than your normal inbox. It handles unsubscribes for you and stops your own email address being marked as spam. We checked these on 18 October 2026:
| Tool | Free plan | Cheapest paid plan | Notes |
|---|---|---|---|
| Mailchimp | Up to 250 contacts and 500 sends a month | Essentials, £9.85 a month for 500 contacts | Shown in pounds on the UK page; check whether tax is added |
| Brevo | Up to 300 emails a day | Starter, £6 a month (£5.42 a month paid yearly) | From 5,000 emails a month |
| MailerLite | Up to 250 subscribers and 2,500 emails a month | Comfort, from $12 a month | Shown in US dollars or euros from the UK, not pounds; may be subject to tax |
Prices change often, so check the page before you sign up.
If you ever send to a lot of Gmail addresses, Google's rules apply too. All senders must keep spam complaints low, and anyone sending more than 5,000 messages a day to Gmail accounts must offer one-click unsubscribe (Google). A good email tool handles most of this for you.
Common questions
Is email marketing worth it for a small business?
For a business that relies on repeat customers, usually yes. It costs little, and it reaches people who already know you.
Can I email my customers without their consent?
Sometimes. Under the soft opt-in you can email existing customers about similar services if they were given a chance to opt out when they bought and in every message since. Otherwise you need their consent.
How do I build an email list from scratch?
Start with your existing customers, add an opt-in tick box to your booking and enquiry forms, and offer something useful in return for signing up, without making the sign-up a condition of getting it.
Where we help
We look after your email and WhatsApp marketing using the booking and enquiry details your business already has. We tidy those into a usable list, don't buy lists or add people who never gave you their details, and record who opts out.
You approve every message and who receives it before anything is sent.
Get Your Free Business Roadmap
Book a free 20-minute Google Meet, then receive a simple one-page plan: The tool that will work FOR you day & night.
Less admin. Every month.
Monthly work from £375. Setup is quoted after the free call, once James knows what your business needs.