True cost of an employee calculator

The calculator The real cost of a hire

Knowing what a hire truly costs is where the automate-or-hire decision starts in AI for Your Business: Basics →

How to read it The wage is only the start of the bill

A salary is the number on the offer letter. The cost is the number that leaves your bank each year — and it is normally bigger. On top of the base pay sit the taxes an employer must pay, a pension contribution, the benefits and software the person uses, and their share of the desk, equipment and premises. This calculator adds those to the wage and hands back the four figures an owner actually plans around — the ongoing annual cost, the fully-loaded cost of year one (which carries the one-off hiring bill), the effective monthly cost, and what an hour of that person's productive time really costs you.

The well-known rule of thumb is that the true cost of an employee lands at roughly 1.25 to 1.4 times the base salary. The default figures here put a £35,000 hire at £47,250 a year — about 1.35× the salary — which sits squarely inside that range. Your own multiple will move with the on-cost percentage and the overhead you carry, but if your total lands far outside 1.25–1.4× base, it is worth checking the inputs.

The formula, in full

On-costs = base salary × (employer tax % ÷ 100). Ongoing annual cost = base salary + on-costs + benefits and software + overhead. Fully-loaded first-year cost = ongoing annual cost + one-off hiring cost, because recruiting and onboarding are paid once, in year one. Effective monthly cost = ongoing annual cost ÷ 12. Real cost per productive hour = ongoing annual cost ÷ 1,750 — because a full-time role is paid for about 2,080 hours a year, but after holiday, sick days and the admin that isn't the job, only around 1,750 of those hours are actually productive. Dividing by the productive hours, not the paid ones, gives the honest hourly cost.

A worked example

Take a £35,000 salary with 15% employer on-costs, £3,000 a year of benefits and software, £4,000 of overhead, and a £3,000 one-off cost to recruit and onboard. The on-costs are 35,000 × 0.15 = £5,250. The ongoing annual cost is 35,000 + 5,250 + 3,000 + 4,000 = £47,250. Year one, carrying the £3,000 hiring bill, is £50,250. That's an effective £3,937.50 a month, and across 1,750 productive hours it works out at £27.00 an hour — nearly a third above the £20/hour the bare salary alone would suggest. The gap between £35,000 and £47,250 is the part most owners forget to budget for.

Edge cases the calculator handles

• A blank or negative input is treated as zero, so a stray minus sign or an empty box never produces a nonsense total — it simply drops that line out of the sum.
• The hourly figure uses ongoing cost, not first-year, on purpose. The one-off hiring bill is a year-one event; loading it into every future hour would overstate what the role costs once the person is settled in.
• The multiple of salary drifts by role. A field role with a van and kit, or a role with rich benefits, runs hotter than 1.4×; a lean remote hire can sit nearer 1.25×. The 1.25–1.4× band is a sense-check, not a law — trust your own inputs over it.

Common questions

Why divide by 1,750 hours and not 2,080?

2,080 is the paid year — 40 hours across 52 weeks. But nobody is productive for all of it. Take out holiday, public holidays, sick days and the meetings and admin that aren't the actual job, and a typical full-timer delivers around 1,750 productive hours. Costing an hour against the productive total, not the paid total, is what makes the hourly figure real rather than flattering.

Should I use this to decide between hiring and automating?

It's one half of that decision. This tells you the true annual and hourly cost of a person; the other half is what a tool or system would cost to do the same work, and how much time it frees. Put this figure next to the AI ROI calculator and a time-savings tool, and the automate-or-hire question becomes a comparison of two honest numbers instead of a gut call.

Is this financial or tax advice?

No. It's arithmetic on the numbers you enter, and it isn't financial or tax advice. The on-cost percentage and the number of productive hours both vary by country, sector and role — employer taxes and pension rules differ everywhere — so use your own figures, and check the local rates that apply to you before you budget off the result.