How much does AI automation cost in the UK?
A pilot on one workflow starts at £1,500 and takes four to six weeks. Several joined-up workflows land between £4,000 and £12,000. Automation built into a bespoke system is quoted as custom software, from £5,000. Running costs are usually a few pounds to a few tens of pounds a month.
Below: the bands, the six things that genuinely move the number, what it costs to keep running, and the tasks we tell people not to automate at any price.
By Lucas Reddington, full-stack developer and AI engineer, Northbytes. Last updated .
Before you spend anything
The cheapest AI automation is the one already inside software you pay for. Most CRMs, helpdesks, accounting packages and inboxes now ship an assistant, summariser or rules engine, and a surprising amount of small-business automation is a switch nobody has turned on. Check that before you brief anyone, including us.
Custom work earns its money in three situations: the task crosses systems that do not talk to each other, the output has to be in your own format or tone rather than a generic one, or the data cannot go through a general-purpose tool for legal or contractual reasons. Outside those, a subscription usually wins.
The second cheapest option is to not automate it. Half of this job is saying no, and the section further down is the test we apply before quoting anything.
The four bands
Grouped by how much of your process the automation touches, which is what the work follows.
Off-the-shelf tools, configured
£0 - £500 setup
The assistant already inside your CRM, helpdesk or accounting tool.
Before anyone builds anything, check what you are already paying for. A lot of small-business automation is a feature you own and have not switched on. If this covers the task, nothing below is worth spending.
A single-workflow pilot
£1,500 - £4,000
One task, automated end to end, running beside your current process.
Scoping session, the build, four to six weeks running alongside what you do today, and a measurement at the end against a number agreed before starting. This is where ours starts and where most small businesses should.
Several joined-up workflows
£4,000 - £12,000
Inbound sorted, data extracted, records updated, exceptions flagged to a person.
Once one pilot has proved itself, the neighbouring steps usually follow, and they share plumbing. The cost is dominated by the systems at each end, not by the AI in the middle.
Automation inside a bespoke system
From £5,000, quoted as custom software
The automation is a feature of your own platform, not a bolt-on.
When the workflow lives inside software we are building for you anyway, it is scoped and priced as part of that build. Our custom software work starts at £5,000.
How we estimated these ranges
- The bands are our read of publicly advertised UK pricing plus the quotes we write ourselves, grouped by how much of a process the automation touches. They are a planning aid, not survey data.
- Northbytes prices - £1,500 for a single-workflow pilot, from £5,000 where the automation sits inside a bespoke build - are our published rates, not market averages, and every project is a fixed quote agreed before we start.
- Usage costs are charged per unit of text by the model provider and are published openly; both major providers' pricing pages are listed under Sources. What you actually pay depends on your volume, so treat any figure on any page, including this one, as an order of magnitude rather than a quote.
- The data-protection positions on this page follow ICO guidance on AI and on automated decision-making, also linked under Sources. They are not legal advice.
What actually moves the number
Six things, in roughly the order they matter. Which model you use is not on the list, and rarely belongs near the top of anyone's.
How bad a wrong answer is
This is the biggest single factor and almost nobody asks about it first. Low blast radius means the model can act. High blast radius means a person approves every output, which means an approval interface, an audit log and a fallback path.
Where the work comes from
A structured webhook is cheap. An inbox is moderate. Scanned PDFs of varying quality, or a system with no API that someone currently exports by hand, is where the days go. The AI is rarely the expensive part.
How many systems it has to update
Reading is easy, writing is not. Every system the automation writes into needs credentials, error handling, and a decision about what happens when it is unavailable halfway through.
Whether the data can leave your control
Standard providers cover most cases. If your sector's rules mean data cannot go to a third-party model at all, the answer is a smaller model on infrastructure you own, which costs more to build and more to run.
How much of the rulebook is written down
If the rules live only in one experienced person's head, the first part of the job is getting them out, and that is discovery time rather than build time. It is also the honest signal that a task may not be ready to automate.
How you will know it worked
Measurement is scope. Running the automation beside the existing process for a few weeks so outputs can be compared costs a little more than switching over and hoping, and it is the difference between evidence and a feeling.
A worked example, with the assumptions stated
A supplier receives around eighty purchase orders a week as PDF attachments, in maybe a dozen different layouts. Someone in the office opens each one, retypes six fields into the order system and files the PDF. Call it five hours a week.
The automation reads the inbox, extracts the fields with a confidence score, writes the order, files the document and puts anything it is unsure about in a review queue with the PDF beside it. A person clears that queue in a few minutes a day instead of retyping everything.
That is a pilot: one workflow, one system to write into, low blast radius because a wrong figure is caught at approval, and a target agreed up front of four of those five hours saved. £1,500 to £2,500, four to six weeks, then a few pounds a month in usage.
What would move it: no API on the order system, so the write has to be scripted through a screen. Orders arriving by post as scans. Or the field being extracted feeding a payment that goes out without a human seeing it, which changes the blast radius and therefore the whole design.
What it costs to keep running
Usually small in money and non-zero in attention. The second half is the part that gets skipped.
Model provider usage
Charged per unit of text processed. At small-business volumes this is typically a few pounds to a few tens of pounds a month. Pay it on your own account so you can see exactly what is being spent, and so the automation is not hostage to a supplier's billing.
Hosting for the workflow itself
Something has to run the automation on a schedule or a trigger. For a single workflow this is small; where it sits inside an app we already host, it is inside the existing fee.
Watching it
Automations fail quietly, which is their worst property. Budget for monitoring and for someone reviewing the flagged cases. An automation nobody checks stops being an asset the first time an upstream format changes.
Re-tuning
Your business changes and so do the models. Expect a small amount of adjustment in the first year, and treat any supplier who implies otherwise with suspicion.
Where the cheapest answer is "don't"
A task is a bad fit if a wrong answer is expensive and hard to spot, if the work is genuinely different every time, if the rules live only in one experienced person's head, or if it happens rarely enough that the automation costs more than the time it saves. Any of those and the honest quote is no quote.
And a hard line rather than a preference: anything that decides something about a person - hiring, discipline, eligibility, credit, safeguarding - stays with a person. We will build the tool that gathers and summarises the evidence. We will not build the thing that decides, and under UK GDPR you would not want us to.
If you want the longer version of that reasoning, the AI automation guide has the workflow-scoring method and a 30-day pilot plan you can run yourself, and our AI automation page sets out how a pilot runs and what we do with your data.
Rough it out in thirty seconds
Answer four questions and see a range, plus which answers moved it. It is a planning aid built from our published prices, not a quote - the real number is fixed and agreed before anything starts.
Likely range for this shape of project
£1,500 – £2,400
Then model provider usage, billed to your own account, usually a few pounds to a few tens of pounds a month at small-business volumes.
What moved the number
Nothing yet - this is our published starting point. One workflow, four to six weeks, running alongside your existing process with a measured result at the end.
Assumes a UK-based team, no regulated-sector requirements, and that you own the result. The spread is real: the same brief lands differently once we have seen the actual data and the actual systems. Anything genuinely unusual we would rather scope properly than guess at.
Get the fixed numberCommon questions
How much does AI automation cost for a UK small business?
A pilot on a single workflow starts at £1,500 and takes four to six weeks, including the scoping session, the build, running it alongside your current process and measuring the result. Several joined-up workflows typically land between £4,000 and £12,000. Automation built into a bespoke system is quoted as custom software, from £5,000. On top of the build there are model provider usage charges, usually a few pounds to a few tens of pounds a month at small-business volumes, paid directly on your own account.
What are the ongoing costs after the build?
Three things: what the model provider charges for the text it processes, somewhere for the workflow to run, and the human time to review whatever the automation flags as uncertain. The first two are usually small. The third is the one people forget, and it is what stops an automation quietly degrading when an upstream form or file format changes.
How do I know it will save more than it costs?
Agree the number before building. Score each candidate task on how often it happens, how long it takes, how much judgement it needs and how bad a wrong answer would be, then pick the best ratio and set a target: hours saved a week, turnaround time, or error rate. Run the pilot beside the existing process so the comparison is real. If it misses the target, you have spent a pilot's budget rather than a platform's, and that is the point of doing it in that order.
Is it cheaper to use an off-the-shelf AI tool?
Often, and you should check first. Most CRMs, helpdesks and accounting packages now ship an assistant, and if it covers your task the right spend is zero. Custom work earns its cost when the task crosses systems that do not talk to each other, when the output has to be in your own format or tone, or when the data cannot go through a general-purpose tool. If a subscription you already pay for does the job, we will tell you so.
What will you refuse to automate?
Any final decision about a person: hiring, discipline, eligibility, credit, safeguarding. We will build the tool that gathers and summarises the evidence; we will not build the thing that decides. That is a hard line, and it is also what the ICO expects of automated decision-making under UK GDPR. We will also say no where the work is different every time, where the rules are not written down anywhere, or where the task happens so rarely that the automation costs more than the time it saves.
Sources
Figures quoted from outside Northbytes come from these sources, checked on 26 July 2026. Our own prices are our published rates.
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