How to calculate the fully loaded hourly cost of an employee
The value of time saved by automation depends entirely on what an hour of staff time really costs. Using base pay understates it; using an inflated figure overstates your ROI. Here is how to get it right.
The formula
Step 1: Employer contributions
These are set by law and vary by country. A few examples:
| Country | Main employer contribution | Notes |
|---|---|---|
| United States | Social Security and Medicare: 7.65% of wages | Plus federal and state unemployment insurance and workers' compensation |
| United Kingdom | Employer National Insurance: 15% on earnings above £5,000 a year (2026-27) | Rate rose from 13.8% in April 2025; eligible employers can claim the Employment Allowance |
| Singapore | CPF: 17% of wages for employees aged 55 and below | Subject to the Ordinary Wage ceiling (S$8,000 a month from 1 January 2026); plus Skills Development Levy |
Rates change; check the current rules for your country and employees. Figures as of 24 Oct 2026.
Step 2: Benefits
Health insurance, retirement contributions above the legal minimum, paid leave and other benefits. In the United States, benefits made up 30% of total compensation costs for private-industry employers in June 2026, according to the Bureau of Labor Statistics — wages and salaries averaged $32.82 an hour and total compensation $46.89.
Step 3: Overheads
Equipment, software licences, office space, IT support, HR and management time. These are often 10–20% of salary for office roles, but your finance team may have an established figure — use it if so.
Step 4: Productive hours
Divide by the hours actually worked, not 52 weeks × 40 hours. After annual leave, public holidays and sick leave, most full-time staff work around 44–47 weeks a year. Our calculator defaults to 46.
Worked example
| Item | Amount |
|---|---|
| Base salary | $60,000 |
| Employer contributions (assume 12%) | $7,200 |
| Benefits (assume 15%) | $9,000 |
| Overheads (assume 12%) | $7,200 |
| Annual employment cost | $83,400 |
| Productive hours (46 weeks × 40 hours) | 1,840 |
| Loaded hourly cost | $45.33 |
| Base hourly pay for comparison ($60,000 ÷ 2,080) | $28.85 |
The loaded cost is about 1.57 times the naive base hourly rate — partly from on-costs, partly from dividing by real working hours rather than 2,080. Many organisations use a simpler multiplier of 1.25 to 1.4 on base pay; that is fine for rough planning, but a proper figure is worth calculating for a large project.
Contractors and outsourced work
If the work is done by contractors or an outsourcing provider, the loaded cost is simpler: it is the hourly or per-unit rate you pay, plus any management time on your side. Automation savings here are often easier to bank, because reducing outsourced volume reduces the invoice directly — one reason research on enterprise AI found some of the clearest returns in cutting outsourcing and agency costs.
Part-time and mixed roles
For part-time staff, use their actual contracted hours as productive hours. For people who spend only part of their time on the task you are automating, the loaded hourly cost is still the right rate — the calculator's hours per task captures how much of their time is affected.
Common mistakes
- Using base pay. Understates the value of time saved and can make good projects look marginal.
- Including revenue. Loaded cost is a cost measure. If you value time at the revenue it could generate, say so separately — it is a different, more optimistic argument.
- One rate for everyone. If the work is done by a mix of junior and senior staff, use a weighted average for the people who actually do it.
Enter your loaded figure as hourly cost per person in the ROI calculator.
Sources
- U.S. Bureau of Labor Statistics, "Compensation costs for private industry workers averaged $46.89 per hour worked in June 2026" (Sept 2026)
- Simply Business, "Employer National Insurance" — 2026-27 rates and thresholds
- Beansprout, "CPF contribution changes from 1 Jan 2026" — summarising CPF Board rates