How to use this calculator
The HR to employee ratio is the number leaders reach for when deciding whether to add HR headcount or invest in software. A ratio that is low for your size can mean a stretched team that only reacts to problems. A ratio that is high can mean too much manual work that a system should be doing.
Enter total employees and HR staff in full-time equivalents. Count recruiters, HR generalists, payroll and benefits staff, and HR leaders, and be consistent about whether payroll is included. If you are building the function from scratch, read our guide to building an HR department.
- Count all employees, including part-time employees as FTEs if you prefer.
- Count HR staff as FTEs, including people who split time between HR and other work.
- Decide whether payroll and recruiting count as HR, and keep that rule.
- Compare with companies of similar size and complexity.
How it's calculated
HR staff per 100 employees = HR FTEs / total employees x 100
Employees per HR person = total employees / HR FTEs
Worked example
A 250-person manufacturer has 3 people in HR: an HR manager, a generalist, and a payroll and benefits specialist. That's 1.2 HR staff per 100 employees, or about 83 employees per HR person.
Instead of hiring a fourth person, the company moved onboarding paperwork and PTO requests into an HRIS. Those two tasks had been taking roughly a day a week from each team member.
Rules to know
Surveys from groups such as SHRM consistently show the ratio falling as companies grow, because larger companies spread HR systems and specialists across more people. Small companies often have two or more HR staff per 100 employees, while large employers often have fewer than one. Multi-state workforces, unionized sites, hourly-heavy industries, and fast hiring all push the right ratio higher.
This is general information for US employers, not legal or tax advice. Rates and rules change and vary by state and city, so confirm current figures with the agency or a qualified advisor.
Common mistakes
- Comparing your ratio with companies of a very different size.
- Counting recruiters in one year and not the next.
- Treating a low ratio as efficiency when compliance work is slipping.
- Adding HR headcount before automating repetitive tasks.
Email templates that go with this
Once you have the number, these templates help you explain it to employees, candidates, or managers.
Where to go from here
A calculator answers one question. The right process and software keep the numbers right every pay period.
Build the skills behind this calculation
- SHRM-CP: SHRM Certified Professional$350 to $499. None required.
- aPHR: Associate Professional in Human Resources$400. None required.
Frequently asked questions
What is a typical HR to employee ratio?
When should a company hire its first HR person?
Does payroll count as HR?
How does HR software change the ratio?
Written by the HRTally Research Team
Our guides are written and reviewed by people with hands-on US HR, payroll, and HR technology experience. Legal and tax facts are checked against primary sources, such as the Department of Labor, IRS, EEOC, and USCIS, and linked at the end of each guide. Vendors never review or pay for our editorial content.