An honest cost comparison — what each genuinely delivers, where each falls short, and what most UK businesses get wrong about this decision.
For repetitive, document-heavy tasks (emails, reports, data entry, research), AI automation is dramatically cheaper and faster. For nuanced relationship management, phone calls, and physical tasks, a human PA is irreplaceable. Most teams we work with find the sweet spot is AI for volume tasks and a part-time human for everything else — at a fraction of the combined cost of a full-time PA.
A full-time PA in the UK costs between £25,000 and £40,000 per year in salary alone. Add employer National Insurance contributions (approximately 13.8% above the NI threshold), pension contributions (minimum 3%), holiday pay, sick leave provision, and management overhead — and the true annual cost of a full-time PA is typically £32,000 to £50,000+.
Part-time PAs start at around £14,000–£20,000 per year for 3 days per week, again before on-costs. Virtual assistants (VAs) start at around £25–£40 per hour, which adds up quickly once you account for the hours most businesses actually need.
Against that, Claude Pro costs approximately £16/month (£192/year), and our training starts at £149 one-time. Even our full implementation service at £2,000 pays for itself in the first month versus a PA hire — and continues delivering value indefinitely.
We'd be doing you a disservice if we said AI could replace every PA function — it can't. AI cannot make or receive phone calls (yet), handle physical post or packages, attend meetings in person, or pick up on subtle relationship dynamics in the way an experienced human assistant can.
A skilled PA understands context that goes beyond the text of an email: they know when a client is upset even if they're being polite, when a stakeholder needs careful handling, or when to escalate something that looks routine. AI lacks this situational awareness.
If your business is heavily relationship-driven and relies on human judgment in communication, a PA (full or part-time) may still be the right answer — or at minimum, the right complement to AI tooling.
The clients we work with who get the best results don't view this as an either-or decision. They use AI to handle the high-volume, repeatable tasks (drafting emails, processing documents, writing reports, data extraction) and — where they need human support — either a part-time PA or a specialist VA for genuinely nuanced work.
This approach typically costs £15,000–£20,000/year (part-time PA + AI tools) versus £35,000–£50,000/year for a full-time PA doing a mixture of AI-automatable and genuinely human tasks. The same output for less than half the cost, with the AI handling tasks at a speed no human can match.
The key question to ask is: of everything a PA currently does (or would do) for your business, what percentage is document and email work versus phone calls, relationship management, and physical tasks? For most professional services businesses, that ratio is 60–80% document-and-email — making a significant chunk of what you'd hire a PA to do directly automatable.
Yes — and this is one of the strongest use cases. Claude produces well-structured, appropriately formal UK business English without prompting. Our clients use it to draft client updates, complaint responses, proposal emails, and follow-up sequences consistently. The quality is indistinguishable from a skilled human drafter for most email types.
Phone calls and verbal communication, managing physical post, booking physical resources (meeting rooms, couriers), attending meetings in person, and exercising fine-grained human judgment in complex interpersonal situations. If these tasks make up a large part of what you need, a human PA is still essential — though AI can handle the document side while a part-time PA handles the rest.
With our training programme, most team members are producing useful outputs with Claude within the first training session. The full 8-module course is self-paced and typically completed over 2–4 weeks, with immediate time savings from day one. Our implementation service gets automations live within 2–4 weeks of engagement.
Book a free 30-minute discovery call or explore our Claude Cowork training — no AI experience needed.