A fractional COO is an experienced chief operating officer who works with your firm part-time, on a monthly retainer, instead of as a full-time employee. For an accountancy firm that means senior operational leadership — improving workflow, capacity, systems, pricing and delivery — at a fraction of the cost and commitment of a permanent hire.
What a fractional COO actually does
A COO — chief operating officer — is the person responsible for how a business runs day to day: its systems, its workflow, its people structure and its delivery. A fractional COO does exactly that job, but part-time and on a rolling monthly basis, so a firm that isn’t large enough to justify a full-time operator can still get senior operational leadership.
In an accountancy practice, that usually means owning the things partners rarely have time to fix properly:
- Mapping and improving how jobs flow through the firm — onboarding, compliance, delivery and review
- Building the systems, SOPs and rhythm that reduce reliance on a few key people
- Planning capacity, clarifying roles and developing managers to own their areas
- Getting the practice-management software actually embedded, not just installed
- Turning better clients, pricing and advisory into a practical operating model
Why accountancy firms use a fractional COO
Most firms don’t plateau because they lack technical ability. They plateau because the business has outgrown the way it operates. Work gets stuck between people and systems, the owner is pulled into everything, and growth creates more complexity rather than more control. A fractional COO brings the operational discipline to break that pattern — without adding a senior salary, on-costs and recruitment risk to a firm that isn’t ready for them.
How it differs from a consultant or practice manager
A consultant typically produces a report and leaves. A fractional COO stays involved, works on what is actually stuck each week, and leaves systems embedded and owned by your team. A practice manager coordinates day-to-day admin; a fractional COO works a level up, on operating strategy and the systems that make the firm scalable. We compare all three in fractional COO vs full-time COO vs practice manager.
When to bring one in
- The firm is busy and growing, but the owner is still too close to the day-to-day
- Deadlines, delivery or client experience are starting to suffer as you scale
- You want to grow advisory or use your technology properly but can’t create the capacity
- You’re preparing for succession, merger or sale and want a firm that runs on systems, not on you
What it costs
A fractional COO is a fraction of the cost of a full-time hire. Optivo, for example, is a single monthly retainer of £4,000 + VAT. See how much a fractional COO costs for the full picture.
Common questions
Is a fractional COO the same as a consultant?
No. A consultant usually delivers a report and moves on. A fractional COO is an ongoing operating partner who works on live issues every week and leaves systems and habits embedded and owned by your team.
How many days a month does a fractional COO work?
It varies by provider. Optivo works to a weekly rhythm — a weekly working session plus a monthly operating review and light-touch support in between — rather than selling a fixed number of days.
What size of firm needs a fractional COO?
Typically founder-led accountancy firms from around £250k to £3m+ in fees: big enough to feel the operational strain, not yet big enough to justify a full-time COO.
Do I still need a practice manager?
Often yes — they do different jobs. A practice manager runs day-to-day coordination; a fractional COO works on operating strategy and the systems that make the firm scalable, and will usually help a practice manager become more effective.
Let’s build a firm that runs without you in the middle of it.
A confidential, no-obligation call to understand your firm, where it’s stuck, and whether Optivo is the right fit. If it’s not, I’ll tell you.