HR Outsourcing Cost for 50 Employees

At 50 employees, most companies have outgrown the founder-does-HR-on-weekends phase. You have multi-state payroll, benefits that matter, and enough people that something is always happening. The question is no longer whether to get HR help, it is which model costs the least for what you actually need.

The three options at 50 employees

Fractional HR: flat monthly retainer

A senior fractional HR partner at this size runs roughly $3,500 to $6,500/month depending on scope. The number does not move when you hire your 51st or 60th person, because it is flat. You pay for senior judgment and the systems to run HR well, not a headcount tax.

PEO: per employee, per month

A PEO typically charges $100 to $200 per employee per month. At 50 people and $125 each, that is about $6,250/month, or roughly $75,000 a year in administrative fees, and that is before the benefits themselves. The fee grows with every hire. The upside is pooled benefits, which can be real value, but on administration alone it is the most expensive line as you scale.

Full-time HR manager

A full-time HR manager at 50 employees costs $70,000 to $95,000 a year fully loaded, once you add benefits, payroll taxes, and software. That is one person's bandwidth, and it is often a mid-level generalist rather than the senior expertise you need for the hard calls.

At 50 employees the flat retainer usually wins on cost against a PEO, and gives you more senior expertise than a single mid-level hire. The exception is when a PEO's pooled benefits materially beat what you can get on your own.

Side by side at 50 employees

Option	Rough monthly cost	Scales with headcount?
Fractional HR	~$3,500–$6,500	No, flat
PEO (~$125/emp)	~$6,250	Yes, every hire
Full-time HR manager	~$6,000–$8,000	Salary, plus you still need senior backup

What 50 employees actually triggers

Headcount is not just a cost input, it changes your legal obligations. Once you cross 50 employees, the Family and Medical Leave Act applies, which brings job-protected leave and real paperwork. You are also near the Affordable Care Act's applicable large employer threshold, which carries its own reporting. The Department of Labor lays out the FMLA requirements in detail, and getting them wrong is expensive. This is the size where having senior HR, not just payroll software, starts to pay for itself.

The bottom line

For a 50-person company, fractional HR is usually the most cost-effective way to get senior HR coverage, flat and predictable, without the per-employee creep of a PEO or the single point of failure of one in-house hire. Run every quote to annual cost at your real headcount before you decide. Bevel HR keeps it flat, from $1,800/month, with no per-employee surprises.

Frequently asked

How much does HR outsourcing cost for 50 employees?

Fractional HR runs about $3,500 to $6,500/month flat at this size. A PEO at roughly $125 per employee is about $6,250/month and climbs with every hire. A full-time HR manager runs $70,000 to $95,000 a year fully loaded. The flat retainer is usually the most predictable and often the cheapest on administration.

Is a PEO or fractional HR cheaper at 50 employees?

On administration, fractional HR usually wins at 50 people because it is flat while a PEO's per-employee fee keeps growing. A PEO can still make sense if its pooled benefits are meaningfully better or cheaper than what you can get on your own, so compare total cost including benefits, not just the admin fee.

Do I need full-time HR at 50 employees?

Not necessarily. A single full-time hire at this size is usually a mid-level generalist who still needs senior backup for the hard calls. Fractional HR gives you senior expertise for less than a full salary, which is why many 50-person companies use fractional support instead of or alongside a junior in-house hire.

What laws kick in at 50 employees?

The Family and Medical Leave Act applies at 50 or more employees, which means job-protected leave and specific notice and recordkeeping rules. You are also near the ACA applicable large employer threshold, which brings its own reporting. These are the obligations where weak HR gets expensive.

Does fractional HR cost more as we grow past 50?

No. A true fractional retainer is flat, so it does not increase as you hire. That is the main cost advantage over a PEO, whose per-employee fee grows with every new hire. Always confirm the retainer is genuinely flat and what scope it covers.

HR Outsourcing Cost for a 50-Employee Company