// Glossary · fractional

Fractional COO

A part-time COO on retainer who gives funded teams the operations leadership they need without the cost of a full-time C-suite hire.

A fractional COO is a senior operator who runs the back-office leadership function of a funded company part-time. The role covers reporting cadence, board-grade dashboards, hiring plan governance, vendor consolidation, finance close, and the operating reviews that keep a 10 to 50 person team coherent. Below 25 employees, the founder usually wears this hat and burns 6 hours a week stitching Stripe, HubSpot, and Notion into a board update by Sunday night. Above 50, you hire a full-time COO and pay $250K plus equity. The fractional engagement covers the in-between, where the work exists but the headcount cost is not yet justifiable.

What the COO does and what the AI Ops Department does are complementary, not duplicate. The COO owns the operating model: which numbers matter, who reports what to whom, what the cadence is, what the escalation rules are. The department executes the operating model: live dashboards, finance close automation, document processing, internal copilots over your wiki and Drive. Pair the two and you remove both the strategy gap (no one owns operating excellence) and the execution gap (the COO would have to hire four people to run their own plan).

The trigger for hiring a fractional COO is usually one of three things. The founder is doing 6 plus hours a week of manual board prep and starts missing weeks. The reporting numbers across Stripe, HubSpot, and the finance ledger stop reconciling and nobody trusts the topline. Or the hiring plan slips because no one is governing the open roles against the burn rate. All three are leadership problems, not headcount problems, which is why the fractional model works. Engagements often pair with AI board reporting once the COO has set the operating cadence the agents need to maintain.

// Examples
  • A 30-person Series A retains a fractional COO 8 hours a week alongside an AI Ops Department running weekly board prep automatically.
  • A bootstrapped 40-person services firm uses a fractional COO for a 90-day operating model rebuild plus permanent AI Ops handoff.
  • A funded marketplace operator runs a fractional COO 12 hours a week to govern the hiring plan and own the Series B operating cadence.
// Common questions
When should a startup hire a fractional COO?
When the founder is losing 6 plus hours a week to board prep and operating cadence work, when reporting numbers stop reconciling across systems, or when the hiring plan slips because no one is governing open roles against burn. All three are leadership signals that the function needs an owner.
How is this different from a finance contractor or bookkeeper?
A bookkeeper closes the month. A finance contractor produces the reports. A fractional COO owns the operating model: which numbers matter, what cadence the company runs on, and how the leadership team makes decisions. The work is operating, not transactional.
Do I need an AI Ops Department alongside the fractional COO?
The COO can run a manual cadence if the company is small enough, but the output compounds when execution is automated underneath. The AI Ops Department handles dashboards, document processing, finance close, and internal copilots. The COO owns the plan the agents are executing against.
How long does a typical engagement run?
Anywhere from 90 days for a one-time operating model rebuild to 18 plus months as the permanent COO function. Most engagements run 12 months and convert to full-time around Series B, once the operating load justifies a $250K loaded executive base.
// Related terms
// Ready to ship?

EOI runs fractional AI departments for funded teams under 50. Sales, Content, Ops, Support. Live in 14 days on a monthly retainer.

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