Hiring a full-time COO is one of the most consequential decisions a founder makes, because the COO takes over much of what the founder used to do. It is also one of the most frequently premature. A fractional COO lets a founder test what the role should be before committing to a salary.
The full-time math
A COO at a $10M to $50M company typically earns $180,000 to $300,000 in base salary, plus a bonus of 20% to 40% and, at some companies, equity or a profit share. Payroll taxes and benefits add 20% to 25%. A retained search costs 25% to 30% of first-year cash, roughly $55,000 to $100,000. Year one all-in runs about $250,000 to $450,000. The failure rate for first COO hires is high, because the founder and the COO often discover they disagree about which decisions the COO really owns.
The fractional math
Published fractional COO retainers run $3,500 to $15,000 a month, about $40,000 to $180,000 a year. One day a week at $5,000 to $10,000 is the typical arrangement. Minimum terms are usually around three months, so a mismatch costs a quarter’s fees.
Where full-time starts to make sense
Operations workload tracks headcount and locations more closely than revenue.
- Under 20 employees: a fractional COO in an advisory arrangement, or the founder plus a strong operations manager.
- 20 to 75 employees: fractional at one day a week, with department heads reporting to the fractional for operational matters. This is the band where the role earns its fee fastest.
- 75 to 150 employees, or several locations: the switch usually happens here. Daily decisions across many teams need someone present, and the fractional’s one or two days are fully consumed by meetings.
- Over 150 employees or $50M in revenue: full-time, often with operations, delivery and people leaders reporting to the COO.
What you lose with fractional
You lose daily presence. Managers wait a few days for decisions that a full-time COO would make in the corridor. You lose the ability to manage a large team directly; a fractional manages through the weekly cadence. You lose some authority, too. Staff know a fractional works elsewhere as well, and some will wait for the founder’s view. Finally, a fractional COO is rarely a successor. If you want someone who could become CEO, you need a full-time hire.
What you gain
You gain experience across several companies, which is exactly what most founders lack when designing an operating structure. You also gain a cheap test of the role. After six months, you know which decisions you are willing to hand over, how your managers respond to accountability and what the full-time job description should say.
The handover
The best sequence is often fractional first, full-time second. The fractional COO installs the operating system, coaches the managers and, when headcount crosses the threshold, helps recruit the full-time COO and hands over a business that already runs on a weekly rhythm. A new COO who inherits a working scorecard and meeting cadence succeeds far more often than one who has to build them while learning the company.