Most AI spending by small businesses is a subscription in search of a problem. The workflows that reliably pay for themselves are the dull ones: chasing quotes and invoices, answering the phone, and replying to the same questions for the tenth time. None of them needs a consultant, and two of them cost nothing. Here are the honest setup costs, the monthly numbers, and the point where the honest answer is to do nothing.
The three that pay
All three share a pattern: the work is repetitive, the rules are simple enough to write down, and the cost of getting it wrong is a missed customer rather than a missed deadline.
1. Chasing quotes and invoices
If you send a quote and then spend Tuesday morning wondering whether to nudge, that is a workflow waiting to be automated. The cheapest version is free: Wave, the accounting tool, includes payment reminders on its free tier, and paid tools such as Xero and QuickBooks do the same. If your invoicing lives in a spreadsheet, a connector such as Zapier can send a polite reminder before a due date and a firmer one after; Zapier’s paid plans start at about $19.99 a month, which is roughly £16. Setup is one afternoon the first time and an hour to tweak afterwards.
Automation vendors estimate invoice reminders save two to four hours a week. That is believable if you bill more than ten invoices a month, because chasing is the job people put off, and the real win is not the time, it is getting paid sooner. A reminder that lands on day one collects money that used to arrive on day twelve.
2. Answering the phone when you cannot
A meaningful share of bookings land outside opening hours (the booking system cost post covers the numbers), and an unanswered phone at 9pm is a booking that went to whoever answers. An AI receptionist now costs from about £40 a month, with Smith.ai’s AI receptionist at $97.50 for thirty calls, around £75, and simpler services starting lower. Compare that with a live answering service at £100 to £1,000 plus, or a part time human receptionist, which is £1,000 a month before employer costs for twenty hours a week at the current minimum wage.
The setup cost is real but one off: an hour or two writing down what you do, where you work and what you charge, then a review of the first week’s calls. The catch is that a receptionist, human or otherwise, is only as good as the notes you give it. If you cannot describe your services in plain sentences, the bot will sound like a bot and the savings will evaporate.
3. Answering the same email for the tenth time
Every trade business gets the same five questions weekly: do you cover my town, how much notice, what does a service cost, what does a repair cost, can you invoice me. The free fix is a saved reply template, ten minutes of work, and it covers most of the volume. The paid fix is a bot that answers from your own written FAQ; Intercom’s Fin agent charges $0.99 per successfully resolved question with a monthly minimum of $49.50, around £40. Below roughly fifty genuine questions a month, the bot is theatre and the template is the whole answer.
| Workflow | Setup cost and effort | Monthly cost | What it saves | Skip it if |
|---|---|---|---|---|
| Invoice and quote reminders | Free to £16, one afternoon | £0 to £16 | Two to four hours a week, faster payment | You bill fewer than ten invoices a month |
| AI receptionist | One to two hours of notes | £40 to £80 | Missed after hours calls captured | You answer within two rings and miss nothing |
| FAQ bot and email triage | Ten minutes of templates | £0 to £40 | Repeat questions answered instantly | You get under fifty repeat questions a month |
| Saved reply templates | Ten minutes, once | £0 | The same five questions answered without retyping | You only ever get a handful of emails |
What to avoid buying
- AI content subscriptions. A £25 a month generator that produces drafts you rewrite only pays if you actually publish weekly. Most small businesses do not, and the subscription outlasts the enthusiasm.
- A chatbot that needs babysitting. If the setup involves training, weekly tuning and a support channel with the vendor, you have created a part time job, not a saving.
- A tool that replaces a person who never existed. Automating work nobody is currently doing, or doing badly, is a subscription for a problem you have not got.
- Consultants with a subscription attached. For a one to five person business, paying £150 an hour for someone to install a £40 tool has a payback problem of its own. These workflows are an afternoon of clicking.
When it is cheaper to do nothing
Do the maths on your own time before buying anything, and be honest about what the freed time is worth. Your hour is worth what you actually do with it when it is freed: if the saved time goes to billable work or rest, it has real value; if it goes to scrolling, the tool loses.
A workable rule of thumb: under thirty minutes a week, do not automate. Under five hours a week, use the free version. Over five hours a week, or when a missed call or a late invoice has a price you can name, pay. Count the hours first, then buy; that order is the whole method.
Most AI spending fails in the same way: the subscription arrives on day one and nobody has timed the job it is meant to replace. Count the hours first, and half the AI market talks itself out of the sale.
What to do now
Pick the workflow that annoys you most this week and time yourself on it. Then set up the free version: a saved reply, a reminder in your invoicing tool, a page of notes for a phone bot. If the free version holds up after a month, you have saved the subscription. If it does not, that is the moment to pay. If you want a second opinion on whether a workflow is worth automating at all, we build these for small businesses and will tell you straight when the answer is no.