Fractional executive search firms UK: how they work, fees & the top firms

A fractional executive search firm specialises in placing part-time senior executives, while traditional executive search firms focus on permanent full-time appointments.

Fractional search firms like Fractional Quest maintain candidate pools of experienced executives seeking flexible, part-time roles.

Traditional executive search firms — sometimes called 'retained search firms' or 'headhunters' — run structured processes to identify permanent candidates, with features including (1) upfront retainers, (2) exclusive engagements, and (3) proactive candidate approaches.

The industry self-regulator is the Association of Executive Search and Leadership Consultants (AESC), founded in 1959 and headquartered in New York.

AESC member firms commit to its Code of Professional Practice.

Two of the firms on this page (Odgers, Boyden) explicitly state AESC membership on their own websites; the others are widely cited as AESC members but do not surface the membership claim on the About pages we reviewed.

Retained search is the standard model for C-suite and board appointments.

The firm is paid a retainer upfront (typically in three instalments — at engagement, at shortlist delivery, and at placement).

The fee is usually 30–35% of the placed candidate's first-year cash compensation for Big Five firms, and 25–33% for UK-headquartered firms and sector boutiques.

The retainer model exists because the firm invests heavily in research and assessment before any candidate signs an offer, and because the search must be confidential and exclusive.

Engaged or hybrid search combines a smaller upfront retainer with a success fee paid only on placement.

It is used by some mid-market and growth-stage firms where the client wants the rigour of a retained process but at lower commercial risk.

Contingency search is paid only on a successful placement.

It is uncommon at genuine C-suite level — the firm has no incentive to invest deeply in research, and the search cannot be exclusive (multiple firms are usually running the same brief in parallel).

Contingency works for functional senior hires below board level, where the candidate pool is wider and timelines are shorter.

Weeks 0–2 (briefing and research): The lead partner spends time with the chair, CEO, and any nomination committee to write the position specification — the role, the success measures, the compensation envelope, the constraints.

The research team builds a market map of every plausible candidate (typically 100–250 names), segmented by current role, sector, geography and risk-of-move.

Weeks 2–8 (longlist and approach): Researchers approach candidates discreetly, screen for interest and fit, and present a longlist (typically 20–40) to the client.

The partner then runs structured interviews and reference work to compress the longlist to a shortlist of 4–6 named candidates that the board will meet.

Weeks 8–16 (shortlist and offer): Board interviews, deeper referencing on the front-runners, psychometric or leadership assessment (firms vary), and offer negotiation.

The placement guarantee — typically 12 months at the Big Five — covers re-search at no additional fee if the placed executive leaves or is terminated within the guarantee period.

A retained search is the right tool for permanent, multi-year, identity-defining appointments — a CEO succession, a public-company CFO, a FTSE board chair.

It is expensive (£60–£200k+ in fees on a £200–£600k role) and slow (3–6 months) because that depth and rigour is what the appointment requires.

It is the wrong tool for several other things that look similar from the outside.

If you need senior capability for a specific phase — a Series A founder building first finance discipline, an interim CFO bridging a fundraise, a turnaround chair for 12 months, a fractional CMO who runs marketing two days a week — a retained search is overkill on cost and timeline.

The same is true if you're not sure you need a full-time role at all and want to learn before committing.

Fractional and interim placements typically start within 1–3 weeks rather than 12–16, cost a fraction of a permanent first-year package (because there's no 30%+ search fee and no annualised full-time salary), and can convert to permanent if the fit is right.

See our guide to top fractional executive search firms for firms specialising in part-time placements.

They don't replace executive search — they sit alongside it as the right answer to a different question.