Fractional COO Salary UK
Chief Operating Officer salary benchmarks for the UK — full-time and fractional. The average COO salary runs £115,590 (Glassdoor) to a £190,000 advertised median, startup COOs from £94,500 (seed) to £135,000 (Series B), and London around £238,000. A fractional COO costs £3,000–£15,000/mo (1–3 days a week) — 40–60% less than a permanent hire.
Chief Operating Officer Salary UK — by stage & percentile
Full-time COO salaries UK 2026 by company stage and segment — startup pay from Sifted, averages from Glassdoor, Salary Expert, Indeed and ITJobsWatch, with the fractional-equivalent monthly retainer alongside (FACTS 25, 173–175).
Role analysis market data.
| Segment | UK Salary | London Salary | Fractional Equivalent |
|---|---|---|---|
| Seed startup | £94,500 | — | £3,000–£5,000/mo |
| Series B startup | £135,000 | — | £6,000–£10,000/mo |
| UK average (Glassdoor) | £115,590 | £238,328 | £5,000–£8,000/mo |
| 25th | £110,000 | £125,000 | £3,000–£5,000/mo |
| Median | £137,834 | £153,346 | £6,000–£10,000/mo |
| 75th | £175,000 | £195,000 | £8,000–£12,000/mo |
| Top 10% | £250,000+ | £280,000+ | £12,000–£15,000/mo |
| London Avg | — | £241,498 | £10,000–£14,000/mo |
True Cost of Full-time COO vs Fractional
Full-time COO loaded cost includes base salary plus employer National Insurance (15% (gov.uk) from April 2025), pension contributions (3–12%), recruitment fees (20–35% first-year salary), plus management overhead and office costs.
UK COO median £137,834 ([Exec Capital](https://execcapital.co.uk/coo-salary-guide-2026)) becomes ~£200,000–£250,000 loaded in year one.
London average £241,498 becomes ~£350,000+ loaded with recruitment, NI, pension, and infrastructure.
Fractional COO at 2 days/week (£8,000–£12,000/mo = £96k–£144k annually) provides 40–60% ([Fractionus](https://fractionus.com/fractional-vs-fulltime-cost-analysis)) savings versus full-time loaded cost while delivering senior operations leadership at the intensity most scale-ups actually need.
Related Resources
More of the same shape — internal.