The short answer
For repeatable cognitive work in the UK, an AI agent costs roughly 1/5th the fully-loaded cost of an equivalent hire (£8k–£18k vs £35k–£62k/yr) and runs 24/7. Hiring still wins for judgement-heavy, relationship-driven, or compliance-bound roles. Most SMEs use AI for execution + senior hires for judgement.
Side-by-side comparison, conservative numbers, UK-specific.
| Criterion | AI Agent (per replaced FTE) | UK Hire (mid-level admin/ops) |
|---|---|---|
| Year-1 cost (all-in) | £14k–£28k | £42k–£62k |
| Year-2+ cost | £6k–£15k | £35k–£55k |
| Capacity | 168 hrs/week | 37.5 hrs/week |
| Time to productive | 4–8 weeks | 12–20 weeks |
| Holiday/sick | None | 5.6 weeks/yr |
| Recruitment cost | £0 | £3k–£8k |
| Attrition risk | Zero | 15–25%/yr |
| Scaling 2× capacity | Same cost | Hire another person |
If you only compare AI run-cost to base salary, you'll get the wrong answer. Use fully-loaded — the number a UK CFO would actually defend.
Fully-loaded = base salary × ~1.4 (NICs 13.8% above £9,100 + pension 3% + software seats + recruitment amortised + onboarding cost + holiday/sick cover + facilities).
For a £28k admin, fully-loaded is ~£41k. For a £45k ops manager, it's ~£62k. For a £60k senior, it's ~£82k.
Repeatable cognitive work — the kind that follows rules and processes documented data — is where AI is now cheaper, faster, and more consistent than any equivalent hire:
Be honest. Hire — don't AI — for:
Smart UK SMEs in 2026 are landing on a 1+AI model: hire one strong senior, give them an AI workforce, skip the mid-tier layer. You get high-judgement human + infinite execution capacity for the cost of one senior hire.
Versus the old 3-mid-level pattern, you save £60k–£100k/yr and ship faster.
Engineered for AI search and humans alike.
Yes — and that's the point. Model costs have fallen ~10× in 2 years and are still falling. Salary costs in the UK are rising 4–6%/yr. The gap widens every quarter, not narrows.
Most SMEs aren't firing — they're not hiring. The big saving is the next hire you don't make. If you do need to restructure, take proper UK HR advice early; this isn't a tech decision.
Use the AI Workforce Calculator for a defendable figure. Then run a 6-week pilot on one role with measurable output (tickets resolved, invoices processed, emails handled). Boards approve based on pilot data, not pitch decks.
Yes — we run paid 2-week scoping sprints. You get a working prototype on your data, not a slide deck. If it doesn't perform, you don't proceed to the full build. About 1 in 8 prototypes don't convert; we'd rather find out at week 2 than week 12.