15/07/2026
The biggest cost in your first UK AI project isn't the build. It's your CTO's time.
Most SME AI budgets account for the developer invoice. A few account for the monthly run rate. Almost none account for the 10-15 hours a week your senior team spends defining the problem before a single line of code is written.
That's not a soft cost. At a senior leadership day rate, six to eight weeks of internal discovery runs Β£20,000-Β£40,000 in unbillable hours β before you've signed a contract with anyone.
And that's before the compliance layer hits.
IR35 misclassification on an AI contractor engagement isn't a paperwork risk β it's a retrospective PAYE liability plus penalties. The compliance review to get it right costs Β£2,500-Β£5,000 and takes three to four weeks. Most project timelines don't carry that buffer.
GDPR adds another dimension. If your AI model trains on or processes UK customer data, you need a lawful basis documented, a data flow map updated, and potentially a DPIA completed. That's not a legal nicety β it's an ICO audit exposure if you skip it.
If you've scoped an AI project internally β what did the actual senior time cost end up being versus what you budgeted for it?
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