Budgeting
What AI actually costs a small business
Every vendor prices AI the same way: a flat monthly figure per person, quoted as though that is the cost. It is the cheapest and most predictable part of what you will actually spend, and treating it as the whole number is how businesses end up paying for eleven subscriptions and unable to say what any of them did last month.
There are only two ways you get charged
Everything on the market is one of these, or a blend of both.
A seat: a flat monthly fee per person
Predictable, easy to budget, and the right default for a small business. You pay whether or not anyone uses it, which is both the risk and the appeal — nobody has to think about cost while working.
Usage: you pay for what you send and what comes back
This is how the underlying interfaces that developers build against are priced, and how most automation tools bill the AI portion of a workflow. It is metered by volume of text, so the bill moves with how much you actually do.
Usage pricing is genuinely cheap for the kind of work a small business does — short prompts, short answers, a few hundred times a day. It becomes expensive in exactly one situation: a loop that runs more often than you think, on more text than you intended. Which is worth knowing before you build one, not after.
Specific prices are deliberately absent here. Every number in this category has changed at least once a year, usually downward, and an article that quotes them is wrong within months. The method below survives the changes.
The four costs nobody budgets for
1. Checking time
This is the big one, and it is invisible because it never appears on an invoice. If a tool drafts something in ten seconds and you spend four minutes reading it carefully, your real cost per item is four minutes, not ten seconds.
That is still a win when the task used to take fifteen minutes. It is a loss when it used to take three. Plenty of AI adoption lands in the second category, and nobody notices because everyone is looking at the drafting time.
2. Setup, and the setup you do twice
The first version of anything takes longer than expected. The honest number is not the afternoon you spend building it — it is that afternoon, plus the second afternoon four weeks later when you discover the shape of your data was not what you assumed.
3. Rework
Output that is 85% right sounds excellent and can be worse than useless. Correcting someone else's near-miss is often slower than writing it yourself, because you have to read carefully enough to find what is wrong before you can fix it. Track how often you rewrite rather than approve; that ratio is the real quality measure.
4. Subscription creep
Two people sign up for similar tools two months apart. A trial converts to paid on a card nobody checks. A tool bought for one project keeps billing after the project ends. None of these are large individually, and collectively they are usually the largest AI line in a small business.
Work out your real cost per task
One calculation, done once, and it settles most arguments.
- Take one job you have automated. Count how many times it ran last month.
- Add up what you paid: the share of subscription attributable to it, plus any usage charges.
- Add checking time: how many minutes per item, multiplied by how many items, valued at whatever an hour of your time is worth.
- Divide by the number of times it ran. That is the true cost per item.
- Compare it against the cost of doing it by hand — the old minutes-per-item at the same hourly value.
The comparison is frequently uncomfortable, and it is supposed to be. A tool that costs a little each month and saves ten minutes a week is not a bargain, it is a rounding error with a login page. A tool that removes four hours a week is worth several times what you are paying and should probably be expanded.
What free tiers are for
A free tier exists so you can find out whether a tool fits before you pay. That is a genuinely useful thing and you should use it for exactly that.
What a free tier is not is a production plan. The predictable failure is the one that arrives at the worst moment: a limit you hit mid-month, a queue you sit in when you are busy, a feature that turns out to be gated, or a data policy that differs from the paid tier in ways that matter once real customer information is involved.
Evaluate free. Run on paid. And check what changes between the two beyond the price — on some products the answer includes how your data is handled, which is not a detail.
The quarterly audit, in fifteen minutes
Open the card statement. List every AI or automation charge. Next to each one, write what it did in the last month — not what it is for, what it did.
- If you cannot write anything, cancel it today. This will be at least one line.
- If two lines do roughly the same job, keep the one people actually open.
- If a seat belongs to someone who has not used it in a month, remove the seat, not the tool.
- If one line is doing a great deal of work, consider whether the next tier up would remove another job.
Fifteen minutes, four times a year. This recovers more money than any negotiation with a vendor, and it is the single cheapest thing in this article to act on.
A sensible shape for the first year
Start with one paid seat for the person who will actually use it daily, and nothing else. Give it a month. Then either add seats because it is obviously working, or stop paying and be honest that it was not.
Resist buying the platform, the connector, the assistant and the specialist tool in the same fortnight. Not because any of them is bad, but because with four new things running at once you will have no idea which one produced the improvement, and no idea which to cut when you need to.
One at a time is slower for about six weeks and then permanently faster, because you can always answer the question that matters: is this thing earning its money?
One line to keep
The bill is not what AI costs you. The bill plus the time spent checking its work is what AI costs you — and a tool that halves your drafting time while doubling your reviewing time has cost you money in a currency your accountant will never show you.