The advertised salary is just the beginning

When you post a job ad for a business admin at £28,000 per year, that number feels manageable. It works out at roughly £2,333 a month. Affordable for most growing SMBs. But that advertised salary is the starting point, not the total cost. Most small business owners underestimate the true cost of an employee by 30–50%, and it is only when the payroll, pension contributions, and hidden overheads start landing that the real figure becomes clear.

The gap between what you advertise and what you actually pay is where profitability quietly erodes. Let us break it down.

The real numbers: what a £28k admin actually costs

Here is the line-by-line breakdown for a full-time business administrator on a £28,000 salary in the UK:

Cost itemAnnual cost
Base salary£28,000
Employer NI (13.8% above threshold)£2,700
Pension (auto-enrolment minimum 3%)£840
Equipment (laptop, desk, phone — amortised)£1,200
Software licences (Office 365, CRM, accounting)£600
Recruitment costs (amortised over 2 years)£1,000
Management time (onboarding, reviews, supervision)£1,500
Holiday cover and sick days (28 + avg 4.4 days)£3,400
Training and development£500
Total£39,740

That is nearly £40,000 per year for one person — 42% more than the advertised salary. And this does not account for the 4–8 week hiring process where the work simply does not get done. Every week without cover is another week of missed enquiries, late invoices, and compliance deadlines slipping.

What does that admin actually do?

Let us be specific about the work. A typical business admin spends their day on tasks like these:

Look at that list carefully. These are repetitive, rule-based tasks that follow a predictable pattern. They are important — miss any of them and the business suffers — but they do not require creative thinking, relationship judgment, or physical presence. They require consistency, speed, and accuracy. Exactly the kind of work AI agents excel at.

What AI agents cost

TenHired deploys specialist AI agents that handle operational tasks like the ones above. Here is what it costs:

Even at the Pro tier, you are paying less than a third of what a single admin costs. And you are not getting one generalist who splits their attention across a dozen tasks. You are getting 10 specialists, each focused on a single domain, running simultaneously.

The comparison that matters

Numbers only tell part of the story. Here is how the two options compare in practice:

Human Admin

  • Works 9–5, Monday to Friday
  • 1 person covering all tasks
  • 28 days holiday + average 4.4 sick days
  • Requires ongoing management and reviews
  • 4–8 weeks to hire and onboard
  • Single point of failure if they leave
  • Costs £39,740 per year

TenHired AI Agents

  • Works 24/7/365, including weekends
  • 10 specialists running simultaneously
  • No holidays, no sick days, no downtime
  • No management overhead required
  • Live in approximately 1 week
  • No single point of failure
  • Costs £4,200–12,000 per year

When you still need a human

We believe in honesty, so here it is: AI agents are not a universal replacement for people. They handle operational, rule-based tasks brilliantly — the repetitive work that eats 60–70% of an admin's day. But they do not replace roles that are fundamentally about human relationships, creative strategy, or physical presence.

If you need someone to sit across the table from a client and build trust, that is a human job. If you need someone to develop a brand strategy or navigate a sensitive HR situation, that requires human judgment. If you need someone on-site to open a building or greet visitors, no AI agent can do that.

The smart move is not replacing your team entirely. It is freeing them from admin so they can focus on the work that actually grows the business — selling, building relationships, solving problems, and making decisions. Let the agents handle the rest.

The bottom line

The question is not “Can I afford AI agents?” It is “Can I afford not to deploy them?”

Every month you spend £3,300 on admin tasks that could run for £550 is money that could fund growth, marketing, or your next strategic hire. Over a year, that gap is worth £27,000 or more — enough to hire a senior salesperson, fund a marketing campaign, or simply take home as profit.

The maths is not ambiguous. The technology is proven. The only question left is how long you want to keep paying 2020 prices for work that 2026 technology handles better, faster, and cheaper.