The short version: download the free WhatsApp Business app, register it with a phone number that isn’t already tied to your personal WhatsApp, build out your profile with hours, category and a catalogue, then set up quick replies and an away message before you tell a single customer it exists. The app takes about fifteen minutes to set up. What it does to your evenings takes a bit longer to sort out, and that’s the part most guides skip.
What you need before you touch the app
Before you download anything, sort out the phone number question, because this is where most small business owners trip up. WhatsApp Business needs its own phone number. It cannot share a number with your personal WhatsApp account unless you migrate that personal account across (which wipes some of the personal features you had, and merges your identity as “the business” from that point on).
Your options, realistically:
- Buy a cheap pay-as-you-go SIM (£1 to £10 depending on network) and use that number just for the business account
- Use a landline number, if you can receive the verification call rather than a text
- Port your existing personal WhatsApp number into the business app and accept that your personal account closes
I’ve seen business owners get this wrong more times than any other step. One client, a jeweller running a small workshop from home in Cheshire, tried to register the business app using her personal mobile number without realising it would try to migrate her personal WhatsApp too, contacts and all. She lost a week sorting out the mess with family group chats that had quietly vanished. Get a second SIM. It’s £1 well spent.
Setting up the app step by step
Once you’ve got a clean number sorted, here’s the actual sequence:
- Download WhatsApp Business from the App Store or Google Play (green icon, briefcase symbol, distinct from the regular WhatsApp app which is not the same product)
- Verify with your dedicated business number, entering the code sent by text or call
- Fill in your business profile: business name, category (there’s a long dropdown list, pick the closest match), a description up to 256 characters, your address, email and website
- Set your business hours, including which days you’re closed, because customers will message at 2am regardless and the hours only affect what they see, not whether they can send you a message
- Build a catalogue if you sell physical or fixed-price items, up to 500 listings, each with a photo, price and short description
- Turn on Greeting Messages, sent automatically the first time someone messages you or after 14 days of inactivity
- Turn on Away Messages, scheduled for outside your set hours
- Set up Quick Replies, shortcuts you type with a forward slash to fire off a saved response (you get up to 50)
- Create Labels to organise your chats, things like “New enquiry”, “Paid”, “Needs follow-up” (capped at 20 labels)
That’s the whole mechanical process. If you’re comfortable with apps generally, you can have this done inside fifteen minutes. The bit that takes longer, and that I’d argue matters more, is deciding what you’re going to say in those quick replies rather than leaving them sounding like every other small business’s canned response. This is the same problem I wrote about in why every small business’s AI copy sounds the same, and it applies just as much to a WhatsApp quick reply as it does to a marketing email.
The verified green tick (and why most businesses never get one)
You’ll notice big brands have a green tick next to their WhatsApp Business name. That’s the official business verification badge, and it comes through Meta Business Suite, not the WhatsApp app itself. You apply through Meta’s business verification process, which asks for legal business documents, a matching website domain, and can take anywhere from a few days to several weeks. Most small businesses, sole traders especially, either don’t bother or don’t qualify cleanly on the first attempt. A grey tick with a business profile is what most of us end up with, and honestly, customers rarely notice or care as long as your profile looks legitimate and your replies are quick.
The uncomfortable bit nobody puts in these guides
Here’s what I’d tell you over a coffee that most “how to set up WhatsApp Business” articles leave out entirely. Setting it up is the easy part. Living with it is the actual work.
WhatsApp doesn’t behave like Instagram DMs or a contact form, where people expect a delay. It behaves like texting a friend. Once a customer has your business number saved, they message you the way they’d message a mate, at 9pm on a Sunday, expecting a reply within the hour because that’s how the app trained them to behave everywhere else in their life. I had a bakery client in Kent, running her cake business from home, who went from zero to forty WhatsApp messages a week within a month of adding the number to her Instagram bio. Some came in at midnight. She felt obligated to reply because the little “seen” tick shows the moment you’ve read something, and customers notice when you’ve read a message and not answered it. That tick is doing something to your relationship with your phone that a website contact form never did.
The fix isn’t complicated, but it does require you to use it, rather than just switching it on and hoping. Set your away message to fire outside stated hours and mean it, close the app notifications after 6pm if you need to, and use quick replies that buy you time honestly (“Thanks for your message, I read these each morning and will get back to you by midday”) rather than pretending you’re instantly available around the clock. Customers respect a clear boundary far more than they respect silence followed by a guilty 11pm reply.
Broadcasting to customers without it feeling like spam
WhatsApp Business lets you send broadcast messages to up to 256 contacts at once, but only to people who already have your number saved in their phone. This is the detail that trips people up. You can’t blast a list you’ve collected elsewhere unless those people have added your business number themselves first, which usually means you need to ask them to save it during a purchase or enquiry.
Use broadcasts for things that need a nudge, a restock notification, a booking reminder, a small thank you after a purchase. Don’t use them the way some businesses use email lists, weekly and generic. WhatsApp still feels personal to most people, and the moment it starts feeling like a newsletter, they’ll mute you or block the number entirely, and you won’t get a bounce notification the way you would with email. You’ll simply stop seeing replies and have no idea why.
Where it fits alongside your other channels
WhatsApp Business isn’t a replacement for everything else you’re doing, it’s another door into the same shop. If you’re already handling enquiries through Facebook Messenger, some of the same discipline applies, and I’ve covered the practical side of that in Facebook Messenger tricks for business pages that move the needle. The tools differ slightly, but the principle of fast, clear, human replies carries across both.
If your volume grows, past roughly 250 conversations a day, the free app starts creaking, because it’s built for one person managing one phone, not a small team. That’s when businesses move to the WhatsApp Business Platform (the API), which runs through a registered provider rather than the app itself, and charges per conversation rather than being free. Pricing in the UK sits roughly in the range of 3 to 9 pence per conversation depending on the category, service replies at the lower end, marketing messages at the higher end, and it resets every 24 hours per customer thread. For most small businesses doing under fifty messages a day, you will never need this, and paying for the API before you need it is money you could spend elsewhere.
Once you’re running any kind of automated reply at scale, whether that’s WhatsApp quick replies or something more elaborate, it’s worth reading how AI chatbots are already answering customers before they reach your website, because the same behaviour is creeping into WhatsApp through third party bots plugged into the API. It’s not something a sole trader needs on day one, but it’s coming down the pipeline faster than most small businesses realise, and recent Meta updates are quietly pushing more AI features into the business tools by default.
Keeping an eye on what people say about you there
One thing WhatsApp Business doesn’t do well is give you visibility beyond your own chats. If a customer screenshots your reply and posts it on Twitter, or complains about your response time in a Facebook group, WhatsApp itself won’t tell you. That’s a separate job, and it’s worth pairing your WhatsApp setup with a proper habit of social listening to track brand mentions, because your WhatsApp reputation lives and dies in places WhatsApp can’t show you.
A short checklist before you go live
- Dedicated phone number sorted, separate from personal WhatsApp
- Profile filled in completely, including hours and category
- Catalogue built if you sell products or fixed-price services
- Away message and greeting message written in your own voice, not the default
- At least five quick replies drafted for your most common questions
- A real decision made about when you will and won’t reply, written down so you stick to it
Get those six things sorted and you’re ready, not just technically set up. The technical setup takes fifteen minutes. Deciding how you’ll run it is the part that determines whether it makes your business feel more responsive or slowly wears you down.
Frequently asked questions
Can I use the same phone number for WhatsApp Business and my personal WhatsApp?
Not without migrating your personal account into the business app, which merges the two and can affect your personal contacts and chat history. Most small business owners are better off getting a second, cheap SIM specifically for the business number.
Is WhatsApp Business free to use?
Yes, the WhatsApp Business app itself is free to download and use for one person managing chats manually. Costs only appear if you move to the WhatsApp Business Platform (the API), which is priced per conversation and usually only makes sense once you’re handling well over 100 to 250 messages a day.
How do I get the green verified tick on WhatsApp Business?
You apply through Meta Business Suite’s business verification process, which checks legal business documents and a matching website domain. It can take days to weeks, and many small businesses end up with a grey tick rather than a green one, which is fine for most customer relationships.
Do customers expect an instant reply on WhatsApp Business?
Often yes, because the app feels informal and shows read receipts, which trains customers to expect the same speed they’d get texting a friend. Setting a clear away message and stated hours protects you far better than staying silent and replying late.
Related reading: Good Side Hustle Ideas When You Already Run a Business and How Do You Turn Playing Games Online Into A Small Income (I Tried It For A Week).
Where to check the details
- WhatsApp’s own Help Centre
