A WorkLighter how-to

What AI actually costs a small business a month

Last updated 7 July 2026

AI costs a small business about £20 a month: one paid AI assistant, and for most owners that's the entire bill. It's a chat tool you use in your browser or on your phone, and it powers most of the everyday jobs, drafting quotes, replies, notes and posts, without anything else. The honest figure isn't zero, and it isn't the hundreds the adverts imply. It's roughly the price of a couple of coffees a week.

What does the basic setup actually cost?

One good AI assistant on its standard paid plan runs about £20 a month. That's the number. There's a free tier, and it's fine for a try, but it's slower, more limited, and cuts you off at busy moments, so once AI is doing real work for you the paid plan pays for itself in saved faff alone. You don't need a second subscription, a course, or a suite of tools to start. One assistant, about £20, is a complete setup for the jobs most small businesses actually have.

What about the free version?

Use it to test the water. The free tier of a mainstream assistant will show you whether this is worth it for your business without spending a penny. What it won't do is carry your daily work reliably: expect limits on how much you can do, slower responses, and no access to the better features. Treat the free tier as the trial and the £20 plan as the tool. If AI is saving you real time, the paid plan isn't the expensive part of your month.

What is the hidden cost?

Your time, at the start. The subscription is the small, visible cost; the real investment is the hour or two you spend setting things up properly, writing your business context down, showing it your voice, getting a workflow right. That's front-loaded: you pay it once and it saves you every week after. Anyone selling AI as instant and no work at all is skipping this part. It isn't hard and it isn't long, but it's real, and budgeting an evening for setup beats expecting magic and giving up. If you've not started yet, how to start using AI when you're not technical walks through that first evening.

When is a second tool worth paying for?

Rarely, and later than the adverts suggest. Eight of ten jobs run on the one assistant you already pay for. A second tool, an automation platform or a niche app, is worth it only when you hit a specific, repeating job the assistant genuinely can't do and you feel the pain of it weekly. Until then, don't buy it. The quickest way to overspend on AI is to buy tools for problems you don't have yet.

Help me sanity-check what AI should cost my business. Do not sell me anything.
What I want to use it for: [the jobs, e.g. quotes, replies, social posts]
What I pay now: [e.g. nothing, or a £20 assistant]

Tell me plainly whether the one assistant I have, or a single £20 plan, can do these jobs, or whether any of them genuinely needs a second paid tool. If it can all be done with one assistant, say so. Do not recommend extra tools I do not need.

Does it pay for itself?

Honestly, for most owners doing a few real jobs with it, yes, and quickly, though this site won't pretend it's guaranteed. If AI saves you a couple of hours a week, £20 a month is a rounding error against your time. If you set it up, use it for one thing, and it saves you nothing, cancel it. You've lost the price of a few coffees, not a fortune. That low downside is the point: the cost is small enough that the only real risk is not trying it. Be wary of anyone quoting you AI in the hundreds or promising it replaces staff. To see what you actually get for the money, read a complete recipe free.