Definition
HR cost optimisation is the practice of reducing what an organisation spends on people processes and the HR function without lowering the quality of hiring, employee service or compliance. It focuses on removing waste, such as duplicated tools and manual work, rather than cutting headcount across the board.
Where HR costs sit
HR costs fall into a few groups: the HR team itself, HR technology and software subscriptions, recruitment spend such as agency fees, job boards and assessment tools, learning and development, and outsourced services such as payroll or benefits administration. There is also the hidden cost of managers' time spent on HR tasks.
The indirect costs of early attrition and slow hiring, such as vacancies left open and roles recruited twice, can be larger than the visible line items but are harder to see because they rarely appear in the HR budget.
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How to measure HR cost
A useful starting figure is HR cost per employee: total HR operating cost for the year divided by average headcount. For example, an HR budget of $300,000 across an average of 500 employees is $600 per employee. Track it alongside cost per hire, the HR-to-employee ratio and time to hire, so that a falling cost is not hiding a drop in service.
Cost per hire is the other core figure: total internal and external recruitment costs for a period divided by the number of hires. If you spent $40,000 on recruitment, including agency fees, advertising, tools and recruiter time, and made 20 hires, cost per hire is $2,000. Watch quality alongside it, such as how many hires stay through their first year.
Practical ways to optimise HR costs
Audit software first. Overlapping tools for applicant tracking, assessments, surveys and learning are common, and consolidating them saves licence fees and admin time. Next, look at recruitment: reducing reliance on agencies, reusing past applicants and screening every applicant consistently in the first round can save more than trimming the HR team.
Then automate, or move to self-service, the high-volume, low-judgement work such as leave requests, standard letters, payslip queries and interview scheduling. Finally, compare outsourcing with in-house delivery for specialist or seasonal work like payroll, benefits administration and peak hiring.
Mistakes to avoid
Cutting training or onboarding can save money this year and raise attrition the next. Removing HR roles without removing the work pushes it onto managers, where it is often done more slowly and less consistently. Measure the effect of each change on service, hiring quality and turnover, and reverse changes that simply move cost elsewhere.
Be wary of savings that rest on a single assumption, such as a new tool replacing a role. Pilot the change with one team first, measure the result, then roll it out.
Frequently asked questions
The main items are usually HR team salaries, recruitment spend such as agency fees and job advertising, HR software, training, and outsourced payroll or benefits administration. Indirect costs, such as unfilled vacancies, early leavers and managers' time on HR admin, can be just as significant but rarely appear in the HR budget.
Add up total HR operating costs for the year, including HR salaries, HR software, recruitment spend, training and outsourced HR services, then divide by average headcount. For example, $250,000 of HR costs across 400 employees is $625 per employee. Define what you include and keep it consistent between years.
Not necessarily. The aim is to remove spending that adds no value, such as duplicated software, manual data entry, avoidable agency fees and repeated hiring caused by early leavers. Cutting HR roles without removing the work usually shifts the cost to managers rather than saving it.
Related terms
Part of the springhire HR glossary.
